gui: Avoid code generating HTML (#8923)

Co-authored-by: Jakob Borg <jakob@kastelo.net>

.codecov.yml

@@ -1,5 +1,20 @@
+comment: false
+
 coverage:
   range: "40...100"
+  precision: 1
+  status:
+    patch:
+      default:
+        informational: true
+    project:
+      default:
+        informational: true
+
+github_checks:
+  annotations: false
 
 ignore:
   - "**.pb.go"
+  - "**_mocked.go"
+  - "**/mocks/*"

.deepsource.toml

@@ -1,7 +1,7 @@
 version = 1
 
-exclude_patterns = ["*.pb.go"]
-test_patterns = ["*_test.go"]
+exclude_patterns = ["**/*.pb.go"]
+test_patterns = ["**/*_test.go"]
 
 [[analyzers]]
 name = "go"

.github/dependabot.yml

@@ -0,0 +1,13 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 10
+
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 10

.github/workflows/build-syncthing.yaml

@@ -0,0 +1,551 @@
+name: Build Syncthing
+
+on:
+  pull_request:
+  push:
+
+env:
+  # The go version to use for builds.
+  GO_VERSION: "^1.20.3"
+
+  # Optimize compatibility on the slow archictures.
+  GO386: softfloat
+  GOARM: "5"
+  GOMIPS: softfloat
+
+  # Avoid hilarious amounts of obscuring log output when running tests.
+  LOGGER_DISCARD: "1"
+
+  # Our build metadata
+  BUILD_USER: builder
+  BUILD_HOST: github.syncthing.net
+
+# A note on actions and third party code... The actions under actions/ (like
+# `uses: actions/checkout`) are maintained by GitHub, and we need to trust
+# GitHub to maintain their code and infrastructure or we're in deep shit in
+# general. The same doesn't necessarily apply to other actions authors, so
+# some care needs to be taken when adding steps, especially in the paths
+# that lead up to code being packaged and signed.
+
+jobs:
+
+  #
+  # Tests for all platforms. Runs a matrix build on Windows, Linux and Mac,
+  # with the list of expected supported Go versions (current, previous).
+  #
+
+  build-test:
+    name: Build and test
+    strategy:
+      fail-fast: false
+      matrix:
+        runner: ["windows-latest", "ubuntu-latest", "macos-latest"]
+        # The oldest version in this list should match what we have in our go.mod.
+        # Variables don't seem to be supported here, or we could have done something nice.
+        go: ["1.19", "1.20"]
+    runs-on: ${{ matrix.runner }}
+    steps:
+      - name: Set git to use LF
+        if: matrix.runner == 'windows-latest'
+        # Without this, the Windows checkout will happen with CRLF line
+        # endings, which is fine for the source code but messes up tests
+        # that depend on data on disk being as expected. Ideally, those
+        # tests should be fixed, but not today.
+        run: |
+          git config --global core.autocrlf false
+          git config --global core.eol lf
+
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ${{ matrix.go }}
+          cache: true
+
+      - name: Build
+        run: |
+          go run build.go
+
+      - name: Test
+        # Our Windows tests currently don't work on Go 1.20
+        # https://github.com/syncthing/syncthing/issues/8779
+        # https://github.com/syncthing/syncthing/issues/8778
+        if: "!(matrix.go == '1.20' && matrix.runner == 'windows-latest')"
+        run: |
+          go run build.go test
+
+  #
+  # Meta checks for formatting, copyright, etc
+  #
+
+  correctness:
+    name: Check correctness
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Check correctness
+        run: |
+          go test -v ./meta
+
+  #
+  # Windows
+  #
+
+  package-windows:
+    name: Package for Windows
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/release' || startsWith(github.ref, 'refs/heads/release-'))
+    environment: signing
+    needs:
+      - build-test
+    runs-on: windows-latest
+    steps:
+      - name: Set git to use LF
+        # Without this, the checkout will happen with CRLF line endings,
+        # which is fine for the source code but messes up tests that depend
+        # on data on disk being as expected. Ideally, those tests should be
+        # fixed, but not today.
+        run: |
+          git config --global core.autocrlf false
+          git config --global core.eol lf
+
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - uses: actions/cache@v3
+        with:
+          path: |
+            ~\AppData\Local\go-build
+            ~\go\pkg\mod
+          key: ${{ runner.os }}-go-${{ env.GO_VERSION }}-package-${{ hashFiles('**/go.sum') }}
+
+      - name: Install dependencies
+        run: |
+          go install github.com/josephspurrier/goversioninfo/cmd/goversioninfo@v1.4.0
+
+      - name: Create packages
+        run: |
+          go run build.go -goarch amd64 zip
+          go run build.go -goarch arm zip
+          go run build.go -goarch arm64 zip
+          go run build.go -goarch 386 zip
+        env:
+          CGO_ENABLED: "0"
+          CODESIGN_SIGNTOOL: ${{ secrets.CODESIGN_SIGNTOOL }}
+          CODESIGN_CERTIFICATE_BASE64: ${{ secrets.CODESIGN_CERTIFICATE_BASE64 }}
+          CODESIGN_CERTIFICATE_PASSWORD: ${{ secrets.CODESIGN_CERTIFICATE_PASSWORD }}
+          CODESIGN_TIMESTAMP_SERVER: ${{ secrets.CODESIGN_TIMESTAMP_SERVER }}
+
+      - name: Archive artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: packages-windows
+          path: syncthing-windows-*.zip
+
+  #
+  # Linux
+  #
+
+  package-linux:
+    name: Package for Linux
+    needs:
+      - build-test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ env.GO_VERSION }}-package-${{ hashFiles('**/go.sum') }}
+
+      - name: Create packages
+        run: |
+          archs=$(go tool dist list | grep linux | sed 's#linux/##')
+          for goarch in $archs ; do
+            go run build.go -goarch "$goarch" tar
+          done
+        env:
+          CGO_ENABLED: "0"
+
+      - name: Archive artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: packages-linux
+          path: syncthing-linux-*.tar.gz
+
+  #
+  # macOS
+  #
+
+  package-macos:
+    name: Package for macOS
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/release' || startsWith(github.ref, 'refs/heads/release-'))
+    environment: signing
+    needs:
+      - build-test
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ env.GO_VERSION }}-package-${{ hashFiles('**/go.sum') }}
+
+      - name: Import signing certificate
+        run: |
+          # Set up a run-specific keychain, making it available for the
+          # `codesign` tool.
+          umask 066
+          KEYCHAIN_PATH=$RUNNER_TEMP/codesign.keychain
+          KEYCHAIN_PASSWORD=$(uuidgen)
+          security create-keychain -p "$KEYCHAIN_PASSWORD" "$KEYCHAIN_PATH"
+          security default-keychain -s "$KEYCHAIN_PATH"
+          security unlock-keychain -p "$KEYCHAIN_PASSWORD" "$KEYCHAIN_PATH"
+          security set-keychain-settings -lut 21600 "$KEYCHAIN_PATH"
+
+          # Import the certificate
+          CERTIFICATE_PATH=$RUNNER_TEMP/codesign.p12
+          echo "$DEVELOPER_ID_CERTIFICATE_BASE64" | base64 -d -o "$CERTIFICATE_PATH"
+          security import "$CERTIFICATE_PATH" -k "$KEYCHAIN_PATH" -P "$DEVELOPER_ID_CERTIFICATE_PASSWORD" -T /usr/bin/codesign -T /usr/bin/productsign
+          security set-key-partition-list -S apple-tool:,apple: -s -k actions "$KEYCHAIN_PATH"
+
+          # Set the codesign identity for following steps
+          echo "CODESIGN_IDENTITY=$CODESIGN_IDENTITY" >> $GITHUB_ENV
+        env:
+          DEVELOPER_ID_CERTIFICATE_BASE64: ${{ secrets.DEVELOPER_ID_CERTIFICATE_BASE64 }}
+          DEVELOPER_ID_CERTIFICATE_PASSWORD: ${{ secrets.DEVELOPER_ID_CERTIFICATE_PASSWORD }}
+          CODESIGN_IDENTITY: ${{ secrets.CODESIGN_IDENTITY }}
+
+      - name: Create package (amd64)
+        run: |
+          go run build.go -goarch amd64 zip
+        env:
+          CGO_ENABLED: "1"
+
+      - name: Create package (arm64 cross)
+        run: |
+          cat <<EOT > xgo.sh
+          #!/bin/bash
+          CGO_ENABLED=1 \
+            CGO_CFLAGS="-target arm64-apple-macos10.15" \
+            CGO_LDFLAGS="-target arm64-apple-macos10.15" \
+            go "\$@"
+          EOT
+          chmod 755 xgo.sh
+          go run build.go -gocmd ./xgo.sh -goarch arm64 zip
+        env:
+          CGO_ENABLED: "1"
+
+      - name: Create package (universal)
+        run: |
+          rm -rf _tmp
+          mkdir _tmp
+          pushd _tmp
+
+          unzip ../syncthing-macos-amd64-*.zip
+          unzip ../syncthing-macos-arm64-*.zip
+          lipo -create syncthing-macos-amd64-*/syncthing syncthing-macos-arm64-*/syncthing -o syncthing
+
+          amd64=(syncthing-macos-amd64-*)
+          universal="${amd64/amd64/universal}"
+          mv "$amd64" "$universal"
+          mv syncthing "$universal"
+          zip -r "../$universal.zip" "$universal"
+
+      - name: Archive artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: packages-macos
+          path: syncthing-*.zip
+
+  notarize-macos:
+    name: Notarize for macOS
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/release' || startsWith(github.ref, 'refs/heads/release-'))
+    environment: signing
+    needs:
+      - package-macos
+    runs-on: macos-latest
+    steps:
+      - name: Download artifacts
+        uses: actions/download-artifact@v3
+        with:
+          name: packages-macos
+
+      - name: Notarize binaries
+        run: |
+          APPSTORECONNECT_API_KEY_PATH="$RUNNER_TEMP/apikey.p8"
+          echo "$APPSTORECONNECT_API_KEY" | base64 -d -o "$APPSTORECONNECT_API_KEY_PATH"
+          for file in syncthing-macos-*.zip ; do
+            xcrun notarytool submit \
+              -k "$APPSTORECONNECT_API_KEY_PATH" \
+              -d "$APPSTORECONNECT_API_KEY_ID" \
+              -i "$APPSTORECONNECT_API_KEY_ISSUER" \
+              $file
+          done
+        env:
+          APPSTORECONNECT_API_KEY: ${{ secrets.APPSTORECONNECT_API_KEY }}
+          APPSTORECONNECT_API_KEY_ID: ${{ secrets.APPSTORECONNECT_API_KEY_ID }}
+          APPSTORECONNECT_API_KEY_ISSUER: ${{ secrets.APPSTORECONNECT_API_KEY_ISSUER }}
+
+  #
+  # Cross compile other unixes
+  #
+
+  package-cross:
+    name: Package cross compiled
+    needs:
+      - build-test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ env.GO_VERSION }}-cross-${{ hashFiles('**/go.sum') }}
+
+      - name: Create packages
+        run: |
+          platforms=$(go tool dist list \
+            | grep -v aix/ppc64 \
+            | grep -v android/ \
+            | grep -v darwin/ \
+            | grep -v ios/ \
+            | grep -v js/ \
+            | grep -v linux/ \
+            | grep -v nacl/ \
+            | grep -v plan9/ \
+            | grep -v windows/ \
+          )
+
+          for plat in $platforms; do
+            goos="${plat%/*}"
+            goarch="${plat#*/}"
+            if ! go run build.go -goos "$goos" -goarch "$goarch" tar ; then
+              echo "*** $plat failed ***"
+            fi
+          done
+        env:
+          CGO_ENABLED: "0"
+
+      - name: Archive artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: packages-other
+          path: syncthing-*.tar.gz
+
+  #
+  # Source
+  #
+
+  package-source:
+    name: Package source code
+    needs:
+      - build-test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Package source
+        run: |
+          version=$(go run build.go version)
+          echo "$version" > RELEASE
+
+          go mod vendor
+          go run build.go assets
+
+          cd ..
+
+          tar c -z -f "syncthing-source-$version.tar.gz" \
+            --exclude .git \
+            syncthing
+
+          mv "syncthing-source-$version.tar.gz" syncthing
+
+      - name: Archive artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: packages-source
+          path: syncthing-source-*.tar.gz
+
+  #
+  # Sign binaries for auto upgrade
+  #
+
+  sign-for-upgrade:
+    name: Sign for upgrade
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/release' || startsWith(github.ref, 'refs/heads/release-'))
+    environment: signing
+    needs:
+      - package-windows
+      - package-linux
+      - package-macos
+      - package-cross
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: actions/checkout@v3
+        with:
+          repository: syncthing/release-tools
+          path: tools
+          fetch-depth: 0
+
+      - name: Download artifacts
+        uses: actions/download-artifact@v3
+
+      - name: Install signing tool
+        run: |
+          go install ./cmd/stsigtool
+
+      - name: Sign archives
+        run: |
+          export PRIVATE_KEY="$RUNNER_TEMP/privkey.pem"
+          export PATH="$PATH:$(go env GOPATH)/bin"
+          echo "$STSIGTOOL_PRIVATE_KEY" | base64 -d > "$PRIVATE_KEY"
+          mkdir packages
+          mv packages-*/* packages
+          pushd packages
+          "$GITHUB_WORKSPACE/tools/sign-only"
+        env:
+          STSIGTOOL_PRIVATE_KEY: ${{ secrets.STSIGTOOL_PRIVATE_KEY }}
+
+      - name: Archive artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: packages-signed
+          path: packages/*
+
+  #
+  # Debian
+  #
+
+  package-debian:
+    name: Package for Debian
+    needs:
+      - build-test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.0'
+
+      - name: Install fpm
+        run: |
+          gem install fpm
+
+      - uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ env.GO_VERSION }}-debian-${{ hashFiles('**/go.sum') }}
+
+      - name: Package for Debian
+        run: |
+          for goarch in amd64 arm64 arm ; do
+            go run build.go -goos linux -goarch "$goarch" deb
+          done
+        env:
+          BUILD_USER: debian
+
+      - name: Archive artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: debian-packages
+          path: "*.deb"
+
+  #
+  # Nightlies
+  #
+
+  publish-nightly:
+    name: Publish nightly build
+    if: github.event_name == 'push' && startsWith(github.ref, 'refs/heads/release-nightly')
+    environment: signing
+    needs:
+      - sign-for-upgrade
+      - notarize-macos
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          repository: syncthing/release-tools
+          path: tools
+          fetch-depth: 0
+
+      - name: Download artifacts
+        uses: actions/download-artifact@v3
+        with:
+          name: packages-signed
+          path: packages
+
+      - name: Create release json
+        run: |
+          cd packages
+          "$GITHUB_WORKSPACE/tools/generate-release-json" "$BASE_URL" > nightly.json
+        env:
+          BASE_URL: https://syncthing.ams3.digitaloceanspaces.com/nightly/
+
+      - name: Push artifacts
+        uses: docker://docker.io/rclone/rclone:latest
+        env:
+          RCLONE_CONFIG_SPACES_TYPE: s3
+          RCLONE_CONFIG_SPACES_PROVIDER: DigitalOcean
+          RCLONE_CONFIG_SPACES_ACCESS_KEY_ID: ${{ secrets.SPACES_KEY }}
+          RCLONE_CONFIG_SPACES_SECRET_ACCESS_KEY: ${{ secrets.SPACES_SECRET }}
+          RCLONE_CONFIG_SPACES_ENDPOINT: ams3.digitaloceanspaces.com
+          RCLONE_CONFIG_SPACES_ACL: public-read
+        with:
+          args: sync packages spaces:syncthing/nightly

.github/workflows/trigger-nightly.yaml

@@ -0,0 +1,21 @@
+name: Trigger nightly build & release
+on:
+  workflow_dispatch:
+  schedule:
+    # Run nightly build at 01:00 UTC
+    - cron: '00 01 * * *'
+
+jobs:
+
+  trigger-nightly:
+    runs-on: ubuntu-latest
+    name: Push to release-nightly to trigger build
+    steps:
+
+      - uses: actions/checkout@v3
+        with:
+          token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
+          fetch-depth: 0
+
+      - run: |
+          git push origin main:release-nightly

.github/workflows/update-docs-translations.yaml

@@ -0,0 +1,28 @@
+name: Update translations and documentation
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '42 3 * * 1'
+
+jobs:
+
+  update_transifex_docs:
+    runs-on: ubuntu-latest
+    name: Update translations and documentation
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ^1.19.6
+      - run: |
+          set -euo pipefail
+          git config --global user.name 'Syncthing Release Automation'
+          git config --global user.email 'release@syncthing.net'
+          bash build.sh translate
+          bash build.sh prerelease
+          git push
+        env:
+          WEBLATE_TOKEN: ${{ secrets.WEBLATE_TOKEN }}

.gitignore

@@ -19,3 +19,4 @@ deb
 /repos
 /proto/scripts/protoc-gen-gosyncthing
 /gui/next-gen-gui
+.idea

.yamlfmt

@@ -0,0 +1,4 @@
+line_ending: lf
+formatter:
+  type: basic
+  retain_line_breaks: true

AUTHORS

@@ -18,24 +18,31 @@ Adam Piggott (ProactiveServices) <aD@simplypeachy.co.uk> <simplypeachy@users.nor
 Adel Qalieh (adelq) <aqalieh95@gmail.com> <adelq@users.noreply.github.com>
 Alan Pope <alan@popey.com>
 Alberto Donato <albertodonato@users.noreply.github.com>
+Aleksey Vasenev <margtu-fivt@ya.ru>
 Alessandro G. (alessandro.g89) <alessandro.g89@gmail.com>
 Alex Lindeman <139387+aelindeman@users.noreply.github.com>
 Alex Xu <alex.hello71@gmail.com>
 Alexander Graf (alex2108) <register-github@alex-graf.de>
+Alexandre Alves <alexandrealvesdb.contact@gmail.com>
 Alexandre Viau (aviau) <alexandre@alexandreviau.net> <aviau@debian.org>
 Aman Gupta <aman@tmm1.net>
 Anderson Mesquita (andersonvom) <andersonvom@gmail.com>
+Andreas Sommer <andreas.sommer87@googlemail.com>
 andresvia <andres.via@gmail.com>
 Andrew Dunham (andrew-d) <andrew@du.nham.ca>
+Andrew Meyer <andrewm.bpi@gmail.com>
 Andrew Rabert (nvllsvm) <ar@nullsum.net> <6550543+nvllsvm@users.noreply.github.com>
 Andrey D (scienmind) <scintertech@cryptolab.net> <scienmind@users.noreply.github.com>
 André Colomb (acolomb) <src@andre.colomb.de> <github.com@andre.colomb.de>
 andyleap <andyleap@gmail.com>
 Anjan Momi <anjan@momi.ca>
+Anthony Goeckner <agoeckner@users.noreply.github.com>
 Antoine Lamielle (0x010C) <antoine.lamielle@0x010c.fr> <gh@0x010c.fr>
 Antony Male (canton7) <antony.male@gmail.com>
+Anur <anurnomeru@163.com>
 Aranjedeath <Aranjedeath@users.noreply.github.com>
 Arkadiusz Tymiński <gevleeog@gmail.com>
+Aroun <login@b-vo.fr>
 Arthur Axel fREW Schmidt (frioux) <frew@afoolishmanifesto.com> <frioux@gmail.com>
 Artur Zubilewicz <AkaZecik@users.noreply.github.com>
 Audrius Butkevicius (AudriusButkevicius) <audrius.butkevicius@gmail.com> <github@audrius.rocks>
@@ -48,6 +55,7 @@ Ben Shepherd (benshep) <bjashepherd@gmail.com>
 Ben Sidhom (bsidhom) <bsidhom@gmail.com>
 Benedikt Heine (bebehei) <bebe@bebehei.de>
 Benedikt Morbach <benedikt.morbach@googlemail.com>
+Benjamin Nater <17193640+bn4t@users.noreply.github.com>
 Benno Fünfstück <benno.fuenfstueck@gmail.com>
 Benny Ng (tpng) <benny.tpng@gmail.com>
 boomsquared <54829195+boomsquared@users.noreply.github.com>
@@ -62,6 +70,7 @@ Carsten Hagemann (carstenhag) <moter8@gmail.com> <carsten@chagemann.de>
 Cathryne Linenweaver (Cathryne) <cathryne.linenweaver@gmail.com> <Cathryne@users.noreply.github.com> <katrinleinweber@MAC.local>
 Cedric Staniewski (xduugu) <cedric@gmx.ca>
 chenrui <rui@meetup.com>
+Chih-Hsuan Yen <yan12125@gmail.com>
 Choongkyu <choongkyu.kim+gh@gmail.com> <vapidlyrapid+gh@gmail.com>
 Chris Howie (cdhowie) <me@chrishowie.com>
 Chris Joel (cdata) <chris@scriptolo.gy>
@@ -70,28 +79,37 @@ Christian Prescott <me@christianprescott.com>
 chucic <chucic@seznam.cz>
 Colin Kennedy (moshen) <moshen.colin@gmail.com>
 Cromefire_ <tim.l@nghorst.net> <26320625+cromefire@users.noreply.github.com>
+cui fliter <imcusg@gmail.com>
 Cyprien Devillez <cypx@users.noreply.github.com>
 Dale Visser <dale.visser@live.com>
 Dan <benda.daniel@gmail.com>
+Daniel Barczyk <46358936+DanielBarczyk@users.noreply.github.com>
 Daniel Bergmann (brgmnn) <dan.arne.bergmann@gmail.com> <brgmnn@users.noreply.github.com>
 Daniel Harte (norgeous) <daniel@harte.me> <daniel@danielharte.co.uk> <norgeous@users.noreply.github.com>
 Daniel Martí (mvdan) <mvdan@mvdan.cc>
 Darshil Chanpura (dtchanpura) <dtchanpura@gmail.com> <dcprime314@gmail.com>
 David Rimmer (dinosore) <dinosore@dbrsoftware.co.uk>
+deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>
 Denis A. (dva) <denisva@gmail.com>
 Dennis Wilson (snnd) <dw@risu.io>
 dependabot-preview[bot] <dependabot-preview[bot]@users.noreply.github.com> <27856297+dependabot-preview[bot]@users.noreply.github.com>
-dependabot[bot] <dependabot[bot]@users.noreply.github.com>
+dependabot[bot] <dependabot[bot]@users.noreply.github.com> <49699333+dependabot[bot]@users.noreply.github.com>
 derekriemer <derek.riemer@colorado.edu>
 desbma <desbma@users.noreply.github.com>
+Devon G. Redekopp <devon@redekopp.com>
+Dimitri Papadopoulos Orfanos <3234522+DimitriPapadopoulos@users.noreply.github.com>
 Dmitry Saveliev (dsaveliev) <d.e.saveliev@gmail.com>
 Domenic Horner <domenic@tgxn.net>
 Dominik Heidler (asdil12) <dominik@heidler.eu>
 Elias Jarlebring (jarlebring) <jarlebring@gmail.com>
 Elliot Huffman <thelich2@gmail.com>
 Emil Hessman (ceh) <emil@hessman.se>
+Eng Zer Jun <engzerjun@gmail.com>
+entity0xfe <109791748+entity0xfe@users.noreply.github.com> <entity0xfe@my.domain>
 Eric Lesiuta <elesiuta@gmail.com>
+Eric P <eric@kastelo.net>
 Erik Meitner (WSGCSysadmin) <e.meitner@willystreet.coop>
+Evan Spensley <94762716+0evan@users.noreply.github.com>
 Evgeny Kuznetsov <evgeny@kuznetsov.md>
 Federico Castagnini (facastagnini) <federico.castagnini@gmail.com>
 Felix Ableitner (Nutomic) <me@nutomic.com>
@@ -99,12 +117,14 @@ Felix Lampe <mail@flampe.de>
 Felix Unterpaintner (bigbear2nd) <bigbear2nd@gmail.com>
 Francois-Xavier Gsell (zukoo) <fxgsell@gmail.com>
 Frank Isemann (fti7) <frank@isemann.name>
+Gahl Saraf <saraf.gahl@gmail.com> <gahl@raftt.io>
 georgespatton <georgespatton@users.noreply.github.com>
 ghjklw <malo@jaffre.info>
 Gilli Sigurdsson (gillisig) <gilli@vx.is>
 Gleb Sinyavskiy <zhulik.gleb@gmail.com>
 Graham Miln (grahammiln) <graham.miln@dssw.co.uk> <graham.miln@miln.eu>
 greatroar <61184462+greatroar@users.noreply.github.com>
+Greg <gco@jazzhaiku.com>
 Han Boetes <han@boetes.org>
 HansK-p <42314815+HansK-p@users.noreply.github.com>
 Harrison Jones (harrisonhjones) <harrisonhjones@users.noreply.github.com>
@@ -112,6 +132,8 @@ Heiko Zuerker (Smiley73) <heiko@zuerker.org>
 Hugo Locurcio <hugo.locurcio@hugo.pro>
 Iain Barnett <iainspeed@gmail.com>
 Ian Johnson (anonymouse64) <ian.johnson@canonical.com> <person.uwsome@gmail.com>
+ignacy123 <ignacy.buczek@onet.pl>
+Ikko Ashimine <eltociear@gmail.com>
 Ilya Brin <464157+ilyabrin@users.noreply.github.com>
 Iskander Sharipov (Alex) <quasilyte@gmail.com>
 Jaakko Hannikainen (jgke) <jgke@jgke.fi>
@@ -120,12 +142,16 @@ Jack Croft <jccroft1@users.noreply.github.com>
 Jacob <jyundt@gmail.com>
 Jake Peterson (acogdev) <jake@acogdev.com>
 Jakob Borg (calmh) <jakob@nym.se> <jakob@kastelo.net>
+James O'Beirne <wild-github@au92.org>
 James Patterson (jpjp) <jamespatterson@operamail.com> <jpjp@users.noreply.github.com>
 janost <janost@tuta.io>
 Jaroslav Lichtblau <svetlemodry@users.noreply.github.com>
 Jaroslav Malec (dzarda) <dzardacz@gmail.com>
 jaseg <githubaccount@jaseg.net>
+Jauder Ho <jauderho@users.noreply.github.com>
 Jaya Chithra (jayachithra) <s.k.jayachithra@gmail.com>
+Jaya Kumar <jaya.kumar@ict.nl>
+Jeffery To <jeffery.to@gmail.com>
 jelle van der Waa <jelle@vdwaa.nl>
 Jens Diemer (jedie) <github.com@jensdiemer.de> <git@jensdiemer.de>
 Jerry Jacobs (xor-gate) <jerry.jacobs@xor-gate.org> <xor-gate@users.noreply.github.com>
@@ -135,13 +161,17 @@ Johan Andersson <j@i19.se>
 Johan Vromans (sciurius) <jvromans@squirrel.nl>
 John Rinehart (fuzzybear3965) <johnrichardrinehart@gmail.com>
 Jonas Thelemann <e-mail@jonas-thelemann.de>
-Jonathan <artback@protonmail.com>
+Jonathan <artback@protonmail.com> <jonagn@gmail.com>
 Jonathan Cross <jcross@gmail.com>
+Jonta <359397+Jonta@users.noreply.github.com>
 Jose Manuel Delicado (jmdaweb) <jmdaweb@hotmail.com> <jmdaweb@users.noreply.github.com>
+jtagcat <git-514635f7@jtag.cat> <git-12dbd862@jtag.cat>
 Jörg Thalheim <Mic92@users.noreply.github.com>
 Jędrzej Kula <kula.jedrek@gmail.com>
+K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
 Kalle Laine <pahakalle@protonmail.com>
 Karol Różycki (krozycki) <rozycki.karol@gmail.com>
+Kebin Liu <lkebin@gmail.com>
 Keith Turner <kturner@apache.org>
 Kelong Cong (kc1212) <kc04bc@gmx.com> <kc1212@users.noreply.github.com>
 Ken'ichi Kamada (kamadak) <kamada@nanohz.org>
@@ -151,13 +181,16 @@ Kevin White, Jr. (kwhite17) <kevinwhite1710@gmail.com>
 klemens <ka7@github.com>
 Kurt Fitzner (Kudalufi) <kurt@va1der.ca> <kurt.fitzner@gmail.com>
 Lars K.W. Gohlke (lkwg82) <lkwg82@gmx.de>
+Lars Lehtonen <lars.lehtonen@gmail.com>
 Laurent Arnoud <laurent@spkdev.net>
 Laurent Etiemble (letiemble) <laurent.etiemble@gmail.com> <laurent.etiemble@monobjc.net>
 Leo Arias (elopio) <yo@elopio.net>
 Liu Siyuan (liusy182) <liusy182@gmail.com> <liusy182@hotmail.com>
 Lode Hoste (Zillode) <zillode@zillode.be>
 Lord Landon Agahnim (LordLandon) <lordlandon@gmail.com>
+LSmithx2 <42276854+lsmithx2@users.noreply.github.com>
 Lukas Lihotzki <lukas@lihotzki.de>
+luzpaz <luzpaz@users.noreply.github.com>
 Majed Abdulaziz (majedev) <majed.alhajry@gmail.com>
 Marc Laporte (marclaporte) <marc@marclaporte.com> <marc@laporte.name>
 Marc Pujol (kilburn) <kilburn@la3.org>
@@ -166,6 +199,7 @@ marco-m <marco.molteni@laposte.net>
 Marcus Legendre <marcus.legendre@gmail.com>
 Mario Majila <mariustshipichik@gmail.com>
 Mark Pulford (mpx) <mark@kyne.com.au>
+Martchus <martchus@gmx.net>
 Mateusz Naściszewski (mateon1) <matin1111@wp.pl>
 Mateusz Ż <thedead4fun@live.com>
 Matic Potočnik <hairyfotr@gmail.com>
@@ -173,20 +207,25 @@ Matt Burke (burkemw3) <mburke@amplify.com> <burkemw3@gmail.com>
 Matt Robenolt <matt@ydekproductions.com>
 Matteo Ruina <matteo.ruina@gmail.com>
 Maurizio Tomasi <ziotom78@gmail.com>
+Max <github@germancoding.com>
 Max Schulze (kralo) <max.schulze@online.de> <kralo@users.noreply.github.com>
 MaximAL <almaximal@ya.ru>
 Maxime Thirouin <m@moox.io>
+mclang <1721600+mclang@users.noreply.github.com>
 Michael Jephcote (Rewt0r) <rewt0r@gmx.com> <Rewt0r@users.noreply.github.com>
 Michael Ploujnikov (plouj) <ploujj@gmail.com>
 Michael Rienstra <mrienstra@gmail.com>
 Michael Tilli (pyfisch) <pyfisch@gmail.com>
+MichaIng <micha@dietpi.com>
 Mike Boone <mike@boonedocks.net>
 MikeLund <MikeLund@users.noreply.github.com>
 MikolajTwarog <43782609+MikolajTwarog@users.noreply.github.com>
 Mingxuan Lin <gdlmx@users.noreply.github.com>
 mv1005 <49659413+mv1005@users.noreply.github.com>
 Nate Morrison (nrm21) <natemorrison@gmail.com>
+Naveen <172697+naveensrinivasan@users.noreply.github.com>
 Nicholas Rishel (PrototypeNM1) <rishel.nick@gmail.com> <PrototypeNM1@users.noreply.github.com>
+Nick Busey <NickBusey@users.noreply.github.com>
 Nico Stapelbroek <3368018+nstapelbroek@users.noreply.github.com>
 Nicolas Braud-Santoni <nicolas@braud-santoni.eu>
 Nicolas Perraut <n.perraut@gmail.com>
@@ -198,6 +237,7 @@ NoLooseEnds <jon.koslung@gmail.com>
 Oliver Freyermuth <o.freyermuth@googlemail.com>
 otbutz <tbutz@optitool.de>
 Otiel <Otiel@users.noreply.github.com>
+overkill <22098433+0verk1ll@users.noreply.github.com>
 Oyebanji Jacob Mayowa <oyebanji05@gmail.com>
 Pablo <pbaeyens31+github@gmail.com>
 Pascal Jungblut (pascalj) <github@pascalj.com> <mail@pascal-jungblut.com>
@@ -218,6 +258,7 @@ Piotr Bejda (piobpl) <piotrb10@gmail.com>
 Pramodh KP (pramodhkp) <pramodh.p@directi.com> <1507241+pramodhkp@users.noreply.github.com>
 Quentin Hibon <qh.public@yahoo.com>
 Rahmi Pruitt <rjpruitt16@gmail.com>
+red_led <red-led@users.noreply.github.com>
 Richard Hartmann <RichiH@users.noreply.github.com>
 Robert Carosi (nov1n) <robert@carosi.nl>
 Roberto Santalla <roobre@users.noreply.github.com>
@@ -226,11 +267,13 @@ Roman Zaynetdinov (zaynetro) <romanznet@gmail.com>
 Ross Smith II (rasa) <ross@smithii.com>
 rubenbe <github-com-00ff86@vandamme.email>
 Ruslan Yevdokymov <38809160+ruslanye@users.noreply.github.com>
+Ryan Qian <i@bitbili.net>
 Ryan Sullivan (KayoticSully) <kayoticsully@gmail.com>
 Sacheendra Talluri (sacheendra) <sacheendra.t@gmail.com>
 Scott Klupfel (kluppy) <kluppy@going2blue.com>
+sec65 <106604020+sec65@users.noreply.github.com>
 Sergey Mishin (ralder) <ralder@yandex.ru>
-Shaarad Dalvi <60266155+shaaraddalvi@users.noreply.github.com>
+Shaarad Dalvi <60266155+shaaraddalvi@users.noreply.github.com> <shdalv@microsoft.com>
 Simon Frei (imsodin) <freisim93@gmail.com>
 Simon Mwepu <simonmwepu@gmail.com>
 Sly_tom_cat <slytomcat@mail.ru>
@@ -238,6 +281,8 @@ Stefan Kuntz (Stefan-Code) <stefan.github@gmail.com> <Stefan.github@gmail.com>
 Stefan Tatschner (rumpelsepp) <stefan@sevenbyte.org> <rumpelsepp@sevenbyte.org> <stefan@rumpelsepp.org>
 Steven Eckhoff <steven.eckhoff.opensource@gmail.com>
 Suhas Gundimeda (snugghash) <suhas.gundimeda@gmail.com> <snugghash@gmail.com>
+Syncthing Automation <automation@syncthing.net>
+Syncthing Release Automation <release@syncthing.net>
 Taylor Khan (nelsonkhan) <nelsonkhan@gmail.com>
 Thomas Hipp <thomashipp@gmail.com>
 Tim Abell (timabell) <tim@timwise.co.uk>
@@ -254,8 +299,10 @@ Tyler Kropp <kropptyler@gmail.com>
 Unrud (Unrud) <unrud@openaliasbox.org> <Unrud@users.noreply.github.com>
 Veeti Paananen (veeti) <veeti.paananen@rojekti.fi>
 Victor Buinsky (buinsky) <vix_booja@tut.by>
+Vik <63919734+ViktorOn@users.noreply.github.com>
 Vil Brekin (Vilbrekin) <vilbrekin@gmail.com>
-Vladimir Rusinov <vrusinov@google.com>
+villekalliomaki <53118179+villekalliomaki@users.noreply.github.com>
+Vladimir Rusinov <vrusinov@google.com> <vladimir.rusinov@gmail.com>
 wangguoliang <liangcszzu@163.com>
 William A. Kennington III (wkennington) <william@wkennington.com>
 wouter bolsterlee <wouter@bolsterl.ee>
@@ -265,3 +312,4 @@ Xavier O. (damajor) <damajor@gmail.com>
 xjtdy888 (xjtdy888) <xjtdy888@163.com>
 Yannic A. (eipiminus1) <eipiminusone+github@gmail.com> <eipiminus1@users.noreply.github.com>
 佛跳墙 <daoquan@qq.com>
+落心 <luoxin.ttt@gmail.com>

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 ## Reporting Bugs
 
-Please file bugs in the [Github Issue
+Please file bugs in the [GitHub Issue
 Tracker](https://github.com/syncthing/syncthing/issues). Include at
 least the following:
 
@@ -24,10 +24,15 @@ too much information will never get you yelled at. :)
 ## Contributing Translations
 
 All translations are done via
-[Transifex](https://www.transifex.com/projects/p/syncthing/). If you
-wish to contribute to a translation, just head over there and sign up.
+[Weblate](https://hosted.weblate.org/projects/syncthing/). If you wish
+to contribute to a translation, just head over there and sign up.
 Before every release, the language resources are updated from the
-latest info on Transifex.
+latest info on Weblate.
+
+Note that the previously used service at
+[Transifex](https://www.transifex.com/projects/p/syncthing/) is being
+retired and we kindly ask you to sign up on Weblate for continued
+involvement.
 
 ## Contributing Code
 

Dockerfile

@@ -15,7 +15,7 @@ EXPOSE 8384 22000/tcp 22000/udp 21027/udp
 
 VOLUME ["/var/syncthing"]
 
-RUN apk add --no-cache ca-certificates su-exec tzdata
+RUN apk add --no-cache ca-certificates curl libcap su-exec tzdata
 
 COPY --from=builder /src/syncthing /bin/syncthing
 COPY --from=builder /src/script/docker-entrypoint.sh /bin/entrypoint.sh
@@ -23,7 +23,8 @@ COPY --from=builder /src/script/docker-entrypoint.sh /bin/entrypoint.sh
 ENV PUID=1000 PGID=1000 HOME=/var/syncthing
 
 HEALTHCHECK --interval=1m --timeout=10s \
-  CMD nc -z 127.0.0.1 8384 || exit 1
+  CMD curl -fkLsS -m 2 127.0.0.1:8384/rest/noauth/health | grep -o --color=never OK || exit 1
 
 ENV STGUIADDRESS=0.0.0.0:8384
+RUN chmod 755 /bin/entrypoint.sh
 ENTRYPOINT ["/bin/entrypoint.sh", "/bin/syncthing", "-home", "/var/syncthing/config"]

Dockerfile.builder

@@ -6,4 +6,4 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 	locales rubygems ruby-dev build-essential git \
 	&& apt-get clean \
 	&& rm -rf /var/lib/apt/lists/* \
-	&& gem install --no-ri --no-rdoc fpm
+	&& gem install fpm

Dockerfile.buildx

@@ -5,7 +5,7 @@ EXPOSE 8384 22000/tcp 22000/udp 21027/udp
 
 VOLUME ["/var/syncthing"]
 
-RUN apk add --no-cache ca-certificates su-exec tzdata
+RUN apk add --no-cache ca-certificates curl libcap su-exec tzdata
 
 COPY ./syncthing-linux-$TARGETARCH /bin/syncthing
 COPY ./script/docker-entrypoint.sh /bin/entrypoint.sh
@@ -13,7 +13,7 @@ COPY ./script/docker-entrypoint.sh /bin/entrypoint.sh
 ENV PUID=1000 PGID=1000 HOME=/var/syncthing
 
 HEALTHCHECK --interval=1m --timeout=10s \
-  CMD nc -z 127.0.0.1 8384 || exit 1
+  CMD curl -fkLsS -m 2 127.0.0.1:8384/rest/noauth/health | grep -o --color=never OK || exit 1
 
 ENV STGUIADDRESS=0.0.0.0:8384
 ENTRYPOINT ["/bin/entrypoint.sh", "/bin/syncthing", "-home", "/var/syncthing/config"]

Dockerfile.stcrashreceiver

@@ -0,0 +1,18 @@
+ARG GOVERSION=latest
+FROM golang:$GOVERSION AS builder
+
+WORKDIR /src
+COPY . .
+
+ENV CGO_ENABLED=0
+ENV BUILD_HOST=syncthing.net
+ENV BUILD_USER=docker
+RUN rm -f stcrashreceiver && go run build.go build stcrashreceiver
+
+FROM alpine
+
+EXPOSE 8080
+
+COPY --from=builder /src/stcrashreceiver /bin/stcrashreceiver
+
+ENTRYPOINT [ "/bin/stcrashreceiver" ]

Dockerfile.strelaypoolsrv

@@ -0,0 +1,26 @@
+ARG GOVERSION=latest
+FROM golang:$GOVERSION AS builder
+
+WORKDIR /src
+COPY . .
+
+ENV CGO_ENABLED=0
+ENV BUILD_HOST=syncthing.net
+ENV BUILD_USER=docker
+RUN rm -f strelaysrv && go run build.go -no-upgrade build strelaypoolsrv
+
+FROM alpine
+
+EXPOSE 8080
+
+RUN apk add --no-cache ca-certificates su-exec curl
+ENV PUID=1000 PGID=1000 MAXMIND_KEY=
+
+RUN mkdir /var/strelaypoolsrv && chown 1000 /var/strelaypoolsrv
+USER 1000
+
+COPY --from=builder /src/strelaypoolsrv /bin/strelaypoolsrv
+COPY --from=builder /src/script/strelaypoolsrv-entrypoint.sh /bin/entrypoint.sh
+
+WORKDIR /var/strelaypoolsrv
+ENTRYPOINT ["/bin/entrypoint.sh", "/bin/strelaypoolsrv", "-listen", ":8080"]

Dockerfile.stupgrades

@@ -0,0 +1,18 @@
+ARG GOVERSION=latest
+FROM golang:$GOVERSION AS builder
+
+WORKDIR /src
+COPY . .
+
+ENV CGO_ENABLED=0
+ENV BUILD_HOST=syncthing.net
+ENV BUILD_USER=docker
+RUN rm -f stupgrades && go run build.go build stupgrades
+
+FROM alpine
+
+EXPOSE 8080
+
+COPY --from=builder /src/stupgrades /bin/stupgrades
+
+ENTRYPOINT [ "/bin/stupgrades" ]

GOALS.md

@@ -57,7 +57,7 @@ latest technology is not always available to any given individual.
 > Computers include desktops, laptops, servers, virtual machines, small
 > general purpose computers such as Raspberry Pis and, *where possible*,
 > tablets and phones. NAS appliances, toasters, cars, firearms, thermostats
-> and so on may include computing capabitilies but it is not our goal for
+> and so on may include computing capabilities but it is not our goal for
 > Syncthing to run smoothly on these devices.
 
 ### 6. For Individuals

README-Docker.md

@@ -7,25 +7,57 @@ Use the `/var/syncthing` volume to have the synchronized files available on the
 host. You can add more folders and map them as you prefer.
 
 Note that Syncthing runs as UID 1000 and GID 1000 by default. These may be
-altered with the ``PUID`` and ``PGID`` environment variables.
+altered with the `PUID` and `PGID` environment variables. In addition
+the name of the Syncthing instance can be optionally defined by using
+`--hostname=syncthing` parameter.
+
+To grant Syncthing additional capabilities without running as root, use the
+`PCAP` environment variable with the same syntax as that for `setcap(8)`.
+For example, `PCAP=cap_chown,cap_fowner+ep`.
 
 ## Example Usage
 
+**Docker cli**
 ```
 $ docker pull syncthing/syncthing
-$ docker run -p 8384:8384 -p 22000:22000/tcp -p 22000:22000/udp \
+$ docker run -p 8384:8384 -p 22000:22000/tcp -p 22000:22000/udp -p 21027:21027/udp \
     -v /wherever/st-sync:/var/syncthing \
+    --hostname=my-syncthing \
     syncthing/syncthing:latest
 ```
 
+**Docker compose**
+```yml
+---
+version: "3"
+services:
+  syncthing:
+    image: syncthing/syncthing
+    container_name: syncthing
+    hostname: my-syncthing
+    environment:
+      - PUID=1000
+      - PGID=1000
+    volumes:
+      - /wherever/st-sync:/var/syncthing
+    ports:
+      - 8384:8384 # Web UI
+      - 22000:22000/tcp # TCP file transfers
+      - 22000:22000/udp # QUIC file transfers
+      - 21027:21027/udp # Receive local discovery broadcasts
+    restart: unless-stopped
+```
+
 ## Discovery
 
-Note that local device discovery will not work with the above command,
-resulting in poor local transfer rates if local device addresses are not
-manually configured.
+Note that Docker's default network mode prevents local IP addresses from
+being discovered, as Syncthing is only able to see the internal IP of the
+container on the `172.17.0.0/16` subnet. This will result in poor transfer rates
+if local device addresses are not manually configured.
 
-To allow local discovery, the docker host network can be used instead:
+It is therefore advisable to use the [host network mode](https://docs.docker.com/network/host/) instead:
 
+**Docker cli**
 ```
 $ docker pull syncthing/syncthing
 $ docker run --network=host \
@@ -33,6 +65,24 @@ $ docker run --network=host \
     syncthing/syncthing:latest
 ```
 
+**Docker compose**
+```yml
+---
+version: "3"
+services:
+  syncthing:
+    image: syncthing/syncthing
+    container_name: syncthing
+    hostname: my-syncthing
+    environment:
+      - PUID=1000
+      - PGID=1000
+    volumes:
+      - /wherever/st-sync:/var/syncthing
+    network_mode: host
+    restart: unless-stopped
+```
+
 Be aware that syncthing alone is now in control of what interfaces and ports it
 listens on. You can edit the syncthing configuration to change the defaults if
 there are conflicts.

README.md

@@ -73,15 +73,16 @@ This helps the team understand what are the biggest pain points for our users, a
 
 ## Getting in Touch
 
-The first and best point of contact is the [Forum][8]. There is also an IRC
-channel, `#syncthing` on [freenode][4] (with a [web client][9]), for talking
-directly to developers and users. If you've found something that is clearly a
+The first and best point of contact is the [Forum][8].
+If you've found something that is clearly a
 bug, feel free to report it in the [GitHub issue tracker][10].
 
 ## Building
 
-Building Syncthing from source is easy, and there's a [guide][5]
-that describes it for both Unix and Windows systems.
+Building Syncthing from source is easy. After extracting the source bundle from
+a release or checking out git, you just need to run `go run build.go` and the
+binaries are created in `./bin`. There's [a guide][5] with more details on the
+build process.
 
 ## Signed Releases
 
@@ -95,19 +96,17 @@ binaries are also properly code signed.
 
 ## Documentation
 
-Please see the [Syncthing documentation site][6].
+Please see the Syncthing [documentation site][6] [[source]][17].
 
 All code is licensed under the [MPLv2 License][7].
 
 [1]: https://docs.syncthing.net/specs/bep-v1.html
 [2]: https://docs.syncthing.net/intro/getting-started.html
 [3]: https://github.com/syncthing/syncthing/blob/main/etc
-[4]: https://www.freenode.net/
 [5]: https://docs.syncthing.net/dev/building.html
 [6]: https://docs.syncthing.net/
 [7]: https://github.com/syncthing/syncthing/blob/main/LICENSE
 [8]: https://forum.syncthing.net/
-[9]: https://kiwiirc.com/client/irc.freenode.net/#syncthing
 [10]: https://github.com/syncthing/syncthing/issues
 [11]: https://docs.syncthing.net/users/contrib.html#gui-wrappers
 [12]: https://www.bountysource.com/teams/syncthing/issues
@@ -115,4 +114,4 @@ All code is licensed under the [MPLv2 License][7].
 [14]: assets/logo-text-128.png
 [15]: https://syncthing.net/
 [16]: https://github.com/syncthing/syncthing/blob/main/README-Docker.md
-
+[17]: https://github.com/syncthing/docs

build.go

@@ -4,6 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
+//go:build ignore
 // +build ignore
 
 package main
@@ -14,13 +15,12 @@ import (
 	"bytes"
 	"compress/flate"
 	"compress/gzip"
-	"crypto/sha256"
+	"encoding/base64"
 	"encoding/json"
 	"errors"
 	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
@@ -30,7 +30,10 @@ import (
 	"runtime"
 	"strconv"
 	"strings"
+	"text/template"
 	"time"
+
+	buildpkg "github.com/syncthing/syncthing/lib/build"
 )
 
 var (
@@ -47,9 +50,12 @@ var (
 	cc             string
 	run            string
 	benchRun       string
+	buildOut       string
 	debugBinary    bool
 	coverage       bool
+	long           bool
 	timeout        = "120s"
+	longTimeout    = "600s"
 	numVersions    = 5
 	withNextGenGUI = os.Getenv("BUILD_NEXT_GEN_GUI") != ""
 )
@@ -59,12 +65,11 @@ type target struct {
 	debname           string
 	debdeps           []string
 	debpre            string
-	debpost           string
 	description       string
 	buildPkgs         []string
 	binaryName        string
 	archiveFiles      []archiveFile
-	systemdServices   []string
+	systemdService    string
 	installationFiles []archiveFile
 	tags              []string
 }
@@ -86,7 +91,6 @@ var targets = map[string]target{
 		name:        "syncthing",
 		debname:     "syncthing",
 		debdeps:     []string{"libc6", "procps"},
-		debpost:     "script/post-upgrade",
 		description: "Open Source Continuous File Synchronization",
 		buildPkgs:   []string{"github.com/syncthing/syncthing/cmd/syncthing"},
 		binaryName:  "syncthing", // .exe will be added automatically for Windows builds
@@ -97,6 +101,7 @@ var targets = map[string]target{
 			{src: "AUTHORS", dst: "AUTHORS.txt", perm: 0644},
 			// All files from etc/ and extra/ added automatically in init().
 		},
+		systemdService: "syncthing@*.service",
 		installationFiles: []archiveFile{
 			{src: "{{binary}}", dst: "deb/usr/bin/{{binary}}", perm: 0755},
 			{src: "README.md", dst: "deb/usr/share/doc/syncthing/README.txt", perm: 0644},
@@ -141,15 +146,14 @@ var targets = map[string]target{
 			{src: "LICENSE", dst: "LICENSE.txt", perm: 0644},
 			{src: "AUTHORS", dst: "AUTHORS.txt", perm: 0644},
 		},
-		systemdServices: []string{
-			"cmd/stdiscosrv/etc/linux-systemd/stdiscosrv.service",
-		},
+		systemdService: "stdiscosrv.service",
 		installationFiles: []archiveFile{
 			{src: "{{binary}}", dst: "deb/usr/bin/{{binary}}", perm: 0755},
 			{src: "cmd/stdiscosrv/README.md", dst: "deb/usr/share/doc/syncthing-discosrv/README.txt", perm: 0644},
 			{src: "LICENSE", dst: "deb/usr/share/doc/syncthing-discosrv/LICENSE.txt", perm: 0644},
 			{src: "AUTHORS", dst: "deb/usr/share/doc/syncthing-discosrv/AUTHORS.txt", perm: 0644},
 			{src: "man/stdiscosrv.1", dst: "deb/usr/share/man/man1/stdiscosrv.1", perm: 0644},
+			{src: "cmd/stdiscosrv/etc/linux-systemd/stdiscosrv.service", dst: "deb/lib/systemd/system/stdiscosrv.service", perm: 0644},
 			{src: "cmd/stdiscosrv/etc/linux-systemd/default", dst: "deb/etc/default/syncthing-discosrv", perm: 0644},
 			{src: "cmd/stdiscosrv/etc/firewall-ufw/stdiscosrv", dst: "deb/etc/ufw/applications.d/stdiscosrv", perm: 0644},
 		},
@@ -170,9 +174,7 @@ var targets = map[string]target{
 			{src: "LICENSE", dst: "LICENSE.txt", perm: 0644},
 			{src: "AUTHORS", dst: "AUTHORS.txt", perm: 0644},
 		},
-		systemdServices: []string{
-			"cmd/strelaysrv/etc/linux-systemd/strelaysrv.service",
-		},
+		systemdService: "strelaysrv.service",
 		installationFiles: []archiveFile{
 			{src: "{{binary}}", dst: "deb/usr/bin/{{binary}}", perm: 0755},
 			{src: "cmd/strelaysrv/README.md", dst: "deb/usr/share/doc/syncthing-relaysrv/README.txt", perm: 0644},
@@ -180,6 +182,7 @@ var targets = map[string]target{
 			{src: "LICENSE", dst: "deb/usr/share/doc/syncthing-relaysrv/LICENSE.txt", perm: 0644},
 			{src: "AUTHORS", dst: "deb/usr/share/doc/syncthing-relaysrv/AUTHORS.txt", perm: 0644},
 			{src: "man/strelaysrv.1", dst: "deb/usr/share/man/man1/strelaysrv.1", perm: 0644},
+			{src: "cmd/strelaysrv/etc/linux-systemd/strelaysrv.service", dst: "deb/lib/systemd/system/strelaysrv.service", perm: 0644},
 			{src: "cmd/strelaysrv/etc/linux-systemd/default", dst: "deb/etc/default/syncthing-relaysrv", perm: 0644},
 			{src: "cmd/strelaysrv/etc/firewall-ufw/strelaysrv", dst: "deb/etc/ufw/applications.d/strelaysrv", perm: 0644},
 		},
@@ -204,18 +207,18 @@ var targets = map[string]target{
 			{src: "AUTHORS", dst: "deb/usr/share/doc/syncthing-relaypoolsrv/AUTHORS.txt", perm: 0644},
 		},
 	},
-}
-
-// These are repos we need to clone to run "go generate"
-
-type dependencyRepo struct {
-	path   string
-	repo   string
-	commit string
-}
-
-var dependencyRepos = []dependencyRepo{
-	{path: "xdr", repo: "https://github.com/calmh/xdr.git", commit: "08e072f9cb16"},
+	"stupgrades": {
+		name:        "stupgrades",
+		description: "Syncthing Upgrade Check Server",
+		buildPkgs:   []string{"github.com/syncthing/syncthing/cmd/stupgrades"},
+		binaryName:  "stupgrades",
+	},
+	"stcrashreceiver": {
+		name:        "stupgrastcrashreceiverdes",
+		description: "Syncthing Crash Server",
+		buildPkgs:   []string{"github.com/syncthing/syncthing/cmd/stcrashreceiver"},
+		binaryName:  "stcrashreceiver",
+	},
 }
 
 func initTargets() {
@@ -314,6 +317,9 @@ func runCommand(cmd string, target target) {
 	case "assets":
 		rebuildAssets()
 
+	case "update-deps":
+		updateDependencies()
+
 	case "proto":
 		proto()
 
@@ -326,6 +332,9 @@ func runCommand(cmd string, target target) {
 	case "transifex":
 		transifex()
 
+	case "weblate":
+		weblate()
+
 	case "tar":
 		buildTar(target, tags)
 
@@ -379,10 +388,12 @@ func parseFlags() {
 	flag.StringVar(&cc, "cc", os.Getenv("CC"), "Set CC environment variable for `go build`")
 	flag.BoolVar(&debugBinary, "debug-binary", debugBinary, "Create unoptimized binary to use with delve, set -gcflags='-N -l' and omit -ldflags")
 	flag.BoolVar(&coverage, "coverage", coverage, "Write coverage profile of tests to coverage.txt")
+	flag.BoolVar(&long, "long", long, "Run tests without the -short flag")
 	flag.IntVar(&numVersions, "num-versions", numVersions, "Number of versions for changelog command")
 	flag.StringVar(&run, "run", "", "Specify which tests to run")
 	flag.StringVar(&benchRun, "bench", "", "Specify which benchmarks to run")
 	flag.BoolVar(&withNextGenGUI, "with-next-gen-gui", withNextGenGUI, "Also build 'newgui'")
+	flag.StringVar(&buildOut, "build-out", "", "Set the '-o' value for 'go build'")
 	flag.Parse()
 }
 
@@ -390,11 +401,17 @@ func test(tags []string, pkgs ...string) {
 	lazyRebuildAssets()
 
 	tags = append(tags, "purego")
-	args := []string{"test", "-short", "-timeout", timeout, "-tags", strings.Join(tags, " ")}
+	args := []string{"test", "-tags", strings.Join(tags, " ")}
+	if long {
+		timeout = longTimeout
+	} else {
+		args = append(args, "-short")
+	}
+	args = append(args, "-timeout", timeout)
 
 	if runtime.GOARCH == "amd64" {
 		switch runtime.GOOS {
-		case "darwin", "linux", "freebsd": // , "windows": # See https://github.com/golang/go/issues/27089
+		case buildpkg.Darwin, buildpkg.Linux, buildpkg.FreeBSD: // , "windows": # See https://github.com/golang/go/issues/27089
 			args = append(args, "-race")
 		}
 	}
@@ -476,7 +493,7 @@ func install(target target, tags []string) {
 		defer shouldCleanupSyso(sysoPath)
 	}
 
-	args := []string{"install", "-v", "-trimpath"}
+	args := []string{"install", "-v"}
 	args = appendParameters(args, tags, target.buildPkgs...)
 	runPrint(goCmd, args...)
 }
@@ -508,7 +525,10 @@ func build(target target, tags []string) {
 		defer shouldCleanupSyso(sysoPath)
 	}
 
-	args := []string{"build", "-v", "-trimpath"}
+	args := []string{"build", "-v"}
+	if buildOut != "" {
+		args = append(args, "-o", buildOut)
+	}
 	args = appendParameters(args, tags, target.buildPkgs...)
 	runPrint(goCmd, args...)
 }
@@ -542,13 +562,13 @@ func appendParameters(args []string, tags []string, pkgs ...string) []string {
 
 	if !debugBinary {
 		// Regular binaries get version tagged and skip some debug symbols
-		args = append(args, "-ldflags", ldflags(tags))
+		args = append(args, "-trimpath", "-ldflags", ldflags(tags))
 	} else {
 		// -gcflags to disable optimizations and inlining. Skip -ldflags
 		// because `Could not launch program: decoding dwarf section info at
 		// offset 0x0: too short` on 'dlv exec ...' see
 		// https://github.com/go-delve/delve/issues/79
-		args = append(args, "-gcflags", "-N -l")
+		args = append(args, "-gcflags", "all=-N -l")
 	}
 
 	return append(args, pkgs...)
@@ -654,11 +674,13 @@ func buildDeb(target target) {
 	for _, dep := range target.debdeps {
 		args = append(args, "-d", dep)
 	}
-	for _, service := range target.systemdServices {
-		args = append(args, "--deb-systemd", service)
-	}
-	if target.debpost != "" {
-		args = append(args, "--after-upgrade", target.debpost)
+	if target.systemdService != "" {
+		debpost, err := createPostInstScript(target)
+		defer os.Remove(debpost)
+		if err != nil {
+			log.Fatal(err)
+		}
+		args = append(args, "--after-upgrade", debpost)
 	}
 	if target.debpre != "" {
 		args = append(args, "--before-install", target.debpre)
@@ -666,6 +688,28 @@ func buildDeb(target target) {
 	runPrint("fpm", args...)
 }
 
+func createPostInstScript(target target) (string, error) {
+	scriptname := filepath.Join("script", "deb-post-inst.template")
+	t, err := template.ParseFiles(scriptname)
+	if err != nil {
+		return "", err
+	}
+	scriptname = strings.TrimSuffix(scriptname, ".template")
+	w, err := os.Create(scriptname)
+	if err != nil {
+		return "", err
+	}
+	defer w.Close()
+	if err = t.Execute(w, struct {
+		Service, Command string
+	}{
+		target.systemdService, target.binaryName,
+	}); err != nil {
+		return "", err
+	}
+	return scriptname, nil
+}
+
 func shouldBuildSyso(dir string) (string, error) {
 	type M map[string]interface{}
 	version := getVersion()
@@ -701,7 +745,7 @@ func shouldBuildSyso(dir string) (string, error) {
 	}
 
 	jsonPath := filepath.Join(dir, "versioninfo.json")
-	err = ioutil.WriteFile(jsonPath, bs, 0644)
+	err = os.WriteFile(jsonPath, bs, 0644)
 	if err != nil {
 		return "", errors.New("failed to create " + jsonPath + ": " + err.Error())
 	}
@@ -714,7 +758,13 @@ func shouldBuildSyso(dir string) (string, error) {
 
 	sysoPath := filepath.Join(dir, "cmd", "syncthing", "resource.syso")
 
-	if _, err := runError("goversioninfo", "-o", sysoPath); err != nil {
+	// See https://github.com/josephspurrier/goversioninfo#command-line-flags
+	armOption := ""
+	if strings.Contains(goarch, "arm") {
+		armOption = "-arm=true"
+	}
+
+	if _, err := runError("goversioninfo", "-o", sysoPath, armOption); err != nil {
 		return "", errors.New("failed to create " + sysoPath + ": " + err.Error())
 	}
 
@@ -734,12 +784,12 @@ func shouldCleanupSyso(sysoFilePath string) {
 // exists. The permission bits are copied as well. If dst already exists and
 // the contents are identical to src the modification time is not updated.
 func copyFile(src, dst string, perm os.FileMode) error {
-	in, err := ioutil.ReadFile(src)
+	in, err := os.ReadFile(src)
 	if err != nil {
 		return err
 	}
 
-	out, err := ioutil.ReadFile(dst)
+	out, err := os.ReadFile(dst)
 	if err != nil {
 		// The destination probably doesn't exist, we should create
 		// it.
@@ -755,7 +805,7 @@ func copyFile(src, dst string, perm os.FileMode) error {
 
 copy:
 	os.MkdirAll(filepath.Dir(dst), 0777)
-	if err := ioutil.WriteFile(dst, in, perm); err != nil {
+	if err := os.WriteFile(dst, in, perm); err != nil {
 		return err
 	}
 
@@ -849,30 +899,46 @@ func shouldRebuildAssets(target, srcdir string) bool {
 	return assetsAreNewer
 }
 
+func updateDependencies() {
+	// Figure out desired Go version
+	bs, err := os.ReadFile("go.mod")
+	if err != nil {
+		log.Fatal(err)
+	}
+	re := regexp.MustCompile(`(?m)^go\s+([0-9.]+)`)
+	matches := re.FindSubmatch(bs)
+	if len(matches) != 2 {
+		log.Fatal("failed to parse go.mod")
+	}
+	goVersion := string(matches[1])
+
+	runPrint(goCmd, "get", "-u", "./...")
+	runPrint(goCmd, "mod", "tidy", "-go="+goVersion, "-compat="+goVersion)
+
+	// We might have updated the protobuf package and should regenerate to match.
+	proto()
+}
+
 func proto() {
 	pv := protobufVersion()
-	dependencyRepos = append(dependencyRepos,
-		dependencyRepo{path: "protobuf", repo: "https://github.com/gogo/protobuf.git", commit: pv},
-	)
+	repo := "https://github.com/gogo/protobuf.git"
+	path := filepath.Join("repos", "protobuf")
 
-	runPrint(goCmd, "get", fmt.Sprintf("github.com/gogo/protobuf/protoc-gen-gogofast@%v", pv))
+	runPrint(goCmd, "install", fmt.Sprintf("github.com/gogo/protobuf/protoc-gen-gogofast@%v", pv))
 	os.MkdirAll("repos", 0755)
-	for _, dep := range dependencyRepos {
-		path := filepath.Join("repos", dep.path)
-		if _, err := os.Stat(path); err != nil {
-			runPrintInDir("repos", "git", "clone", dep.repo, dep.path)
-		} else {
-			runPrintInDir(path, "git", "fetch")
-		}
-		runPrintInDir(path, "git", "checkout", dep.commit)
+
+	if _, err := os.Stat(path); err != nil {
+		runPrint("git", "clone", repo, path)
+	} else {
+		runPrintInDir(path, "git", "fetch")
 	}
+	runPrintInDir(path, "git", "checkout", pv)
+
 	runPrint(goCmd, "generate", "github.com/syncthing/syncthing/cmd/stdiscosrv")
 	runPrint(goCmd, "generate", "proto/generate.go")
 }
 
 func testmocks() {
-	runPrint(goCmd, "get", "golang.org/x/tools/cmd/goimports")
-	runPrint(goCmd, "get", "github.com/maxbrunsfeld/counterfeiter/v6")
 	args := []string{
 		"generate",
 		"github.com/syncthing/syncthing/lib/config",
@@ -902,6 +968,11 @@ func transifex() {
 	runPrint(goCmd, "run", "../../../../script/transifexdl.go")
 }
 
+func weblate() {
+	os.Chdir("gui/default/assets/lang")
+	runPrint(goCmd, "run", "../../../../script/weblatedl.go")
+}
+
 func ldflags(tags []string) string {
 	b := new(strings.Builder)
 	b.WriteString("-w")
@@ -926,7 +997,7 @@ func rmr(paths ...string) {
 }
 
 func getReleaseVersion() (string, error) {
-	bs, err := ioutil.ReadFile("RELEASE")
+	bs, err := os.ReadFile("RELEASE")
 	if err != nil {
 		return "", err
 	}
@@ -949,7 +1020,7 @@ func getGitVersion() (string, error) {
 	v0 := string(bs)
 
 	// To be more semantic-versionish and ensure proper ordering in our
-	// upgrade process, we make sure there's only one hypen in the version.
+	// upgrade process, we make sure there's only one hyphen in the version.
 
 	versionRe := regexp.MustCompile(`-([0-9]{1,3}-g[0-9a-f]{5,10}(-dirty)?)`)
 	if m := versionRe.FindStringSubmatch(vcur); len(m) > 0 {
@@ -1037,10 +1108,14 @@ func getBranchSuffix() string {
 
 	branch = parts[len(parts)-1]
 	switch branch {
-	case "master", "release", "main":
+	case "release", "main":
 		// these are not special
 		return ""
 	}
+	if strings.HasPrefix(branch, "release-") {
+		// release branches are not special
+		return ""
+	}
 
 	validBranchRe := regexp.MustCompile(`^[a-zA-Z0-9_.-]+$`)
 	if !validBranchRe.MatchString(branch) {
@@ -1258,11 +1333,11 @@ func zipFile(out string, files []archiveFile) {
 
 		if strings.HasSuffix(f.dst, ".txt") {
 			// Text file. Read it and convert line endings.
-			bs, err := ioutil.ReadAll(sf)
+			bs, err := io.ReadAll(sf)
 			if err != nil {
 				log.Fatal(err)
 			}
-			bs = bytes.Replace(bs, []byte{'\n'}, []byte{'\n', '\r'}, -1)
+			bs = bytes.Replace(bs, []byte{'\n'}, []byte{'\r', '\n'}, -1)
 			fh.UncompressedSize = uint32(len(bs))
 			fh.UncompressedSize64 = uint64(len(bs))
 
@@ -1333,6 +1408,33 @@ func windowsCodesign(file string) {
 		args := []string{"sign", "/fd", algo}
 		if f := os.Getenv("CODESIGN_CERTIFICATE_FILE"); f != "" {
 			args = append(args, "/f", f)
+		} else if b := os.Getenv("CODESIGN_CERTIFICATE_BASE64"); b != "" {
+			// Decode the PFX certificate from base64.
+			bs, err := base64.RawStdEncoding.DecodeString(b)
+			if err != nil {
+				log.Println("Codesign: signing failed: decoding base64:", err)
+				return
+			}
+
+			// Write it to a temporary file
+			f, err := os.CreateTemp("", "codesign-*.pfx")
+			if err != nil {
+				log.Println("Codesign: signing failed: creating temp file:", err)
+				return
+			}
+			_ = f.Chmod(0600) // best effort remove other users' access
+			defer os.Remove(f.Name())
+			if _, err := f.Write(bs); err != nil {
+				log.Println("Codesign: signing failed: writing temp file:", err)
+				return
+			}
+			if err := f.Close(); err != nil {
+				log.Println("Codesign: signing failed: closing temp file:", err)
+				return
+			}
+
+			// Use that when signing
+			args = append(args, "/f", f.Name())
 		}
 		if p := os.Getenv("CODESIGN_CERTIFICATE_PASSWORD"); p != "" {
 			args = append(args, "/p", p)
@@ -1352,7 +1454,7 @@ func windowsCodesign(file string) {
 
 		bs, err := runError(st, args...)
 		if err != nil {
-			log.Println("Codesign: signing failed:", string(bs))
+			log.Printf("Codesign: signing failed: %v: %s", err, string(bs))
 			return
 		}
 		log.Println("Codesign: successfully signed", file, "using", algo)
@@ -1369,32 +1471,6 @@ func metalintShort() {
 	runPrint(goCmd, "test", "-short", "-run", "Metalint", "./meta")
 }
 
-func temporaryBuildDir() (string, error) {
-	// The base of our temp dir is "syncthing-xxxxxxxx" where the x:es
-	// are eight bytes from the sha256 of our working directory. We do
-	// this because we want a name in the global temp dir that doesn't
-	// conflict with someone else building syncthing on the same
-	// machine, yet is persistent between runs from the same source
-	// directory.
-	wd, err := os.Getwd()
-	if err != nil {
-		return "", err
-	}
-	hash := sha256.Sum256([]byte(wd))
-	base := fmt.Sprintf("syncthing-%x", hash[:4])
-
-	// The temp dir is taken from $STTMPDIR if set, otherwise the system
-	// default (potentially infrluenced by $TMPDIR on unixes).
-	var tmpDir string
-	if t := os.Getenv("STTMPDIR"); t != "" {
-		tmpDir = t
-	} else {
-		tmpDir = os.TempDir()
-	}
-
-	return filepath.Join(tmpDir, base), nil
-}
-
 func (t target) BinaryName() string {
 	if goos == "windows" {
 		return t.binaryName + ".exe"

build.sh

@@ -23,7 +23,7 @@ case "${1:-default}" in
 
 	prerelease)
 		script authors
-		build transifex
+		build weblate
 		pushd man ; ./refresh.sh ; popd
 		git add -A gui man AUTHORS
 		git commit -m 'gui, man, authors: Update docs, translations, and contributors'

cmd/stcrashreceiver/diskstore.go

@@ -0,0 +1,187 @@
+// Copyright (C) 2023 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package main
+
+import (
+	"bytes"
+	"compress/gzip"
+	"context"
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"sort"
+	"time"
+)
+
+type diskStore struct {
+	dir      string
+	inbox    chan diskEntry
+	maxBytes int64
+	maxFiles int
+
+	currentFiles []currentFile
+	currentSize  int64
+}
+
+type diskEntry struct {
+	path string
+	data []byte
+}
+
+type currentFile struct {
+	path  string
+	size  int64
+	mtime int64
+}
+
+func (d *diskStore) Serve(ctx context.Context) {
+	if err := os.MkdirAll(d.dir, 0750); err != nil {
+		log.Println("Creating directory:", err)
+		return
+	}
+
+	if err := d.inventory(); err != nil {
+		log.Println("Failed to inventory disk store:", err)
+	}
+	d.clean()
+
+	cleanTimer := time.NewTicker(time.Minute)
+	inventoryTimer := time.NewTicker(24 * time.Hour)
+
+	buf := new(bytes.Buffer)
+	gw := gzip.NewWriter(buf)
+	for {
+		select {
+		case entry := <-d.inbox:
+			path := d.fullPath(entry.path)
+
+			if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil {
+				log.Println("Creating directory:", err)
+				continue
+			}
+
+			buf.Reset()
+			gw.Reset(buf)
+			if _, err := gw.Write(entry.data); err != nil {
+				log.Println("Failed to compress crash report:", err)
+				continue
+			}
+			if err := gw.Close(); err != nil {
+				log.Println("Failed to compress crash report:", err)
+				continue
+			}
+			if err := os.WriteFile(path, buf.Bytes(), 0644); err != nil {
+				log.Printf("Failed to write %s: %v", entry.path, err)
+				_ = os.Remove(path)
+				continue
+			}
+
+			d.currentSize += int64(buf.Len())
+			d.currentFiles = append(d.currentFiles, currentFile{
+				size: int64(len(entry.data)),
+				path: path,
+			})
+
+		case <-cleanTimer.C:
+			d.clean()
+
+		case <-inventoryTimer.C:
+			if err := d.inventory(); err != nil {
+				log.Println("Failed to inventory disk store:", err)
+			}
+
+		case <-ctx.Done():
+			return
+		}
+	}
+}
+
+func (d *diskStore) Put(path string, data []byte) bool {
+	select {
+	case d.inbox <- diskEntry{
+		path: path,
+		data: data,
+	}:
+		return true
+	default:
+		return false
+	}
+}
+
+func (d *diskStore) Get(path string) ([]byte, error) {
+	path = d.fullPath(path)
+	bs, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	gr, err := gzip.NewReader(bytes.NewReader(bs))
+	if err != nil {
+		return nil, err
+	}
+	defer gr.Close()
+	return io.ReadAll(gr)
+}
+
+func (d *diskStore) Exists(path string) bool {
+	path = d.fullPath(path)
+	_, err := os.Lstat(path)
+	return err == nil
+}
+
+func (d *diskStore) clean() {
+	for len(d.currentFiles) > 0 && (len(d.currentFiles) > d.maxFiles || d.currentSize > d.maxBytes) {
+		f := d.currentFiles[0]
+		log.Println("Removing", f.path)
+		if err := os.Remove(f.path); err != nil {
+			log.Println("Failed to remove file:", err)
+		}
+		d.currentFiles = d.currentFiles[1:]
+		d.currentSize -= f.size
+	}
+	var oldest time.Duration
+	if len(d.currentFiles) > 0 {
+		oldest = time.Since(time.Unix(d.currentFiles[0].mtime, 0)).Truncate(time.Minute)
+	}
+	log.Printf("Clean complete: %d files, %d MB, oldest is %v ago", len(d.currentFiles), d.currentSize>>20, oldest)
+}
+
+func (d *diskStore) inventory() error {
+	d.currentFiles = nil
+	d.currentSize = 0
+	err := filepath.Walk(d.dir, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if info.IsDir() {
+			return nil
+		}
+		if filepath.Ext(path) != ".gz" {
+			return nil
+		}
+		d.currentSize += info.Size()
+		d.currentFiles = append(d.currentFiles, currentFile{
+			path:  path,
+			size:  info.Size(),
+			mtime: info.ModTime().Unix(),
+		})
+		return nil
+	})
+	sort.Slice(d.currentFiles, func(i, j int) bool {
+		return d.currentFiles[i].mtime < d.currentFiles[j].mtime
+	})
+	var oldest time.Duration
+	if len(d.currentFiles) > 0 {
+		oldest = time.Since(time.Unix(d.currentFiles[0].mtime, 0)).Truncate(time.Minute)
+	}
+	log.Printf("Inventory complete: %d files, %d MB, oldest is %v ago", len(d.currentFiles), d.currentSize>>20, oldest)
+	return err
+}
+
+func (d *diskStore) fullPath(path string) string {
+	return filepath.Join(d.dir, path[0:2], path[2:]) + ".gz"
+}

cmd/stcrashreceiver/main.go

@@ -13,17 +13,17 @@
 package main
 
 import (
+	"context"
 	"encoding/json"
-	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
-	"net"
 	"net/http"
 	"os"
+	"path/filepath"
 	"time"
 
+	"github.com/alecthomas/kong"
 	"github.com/syncthing/syncthing/lib/sha256"
 	"github.com/syncthing/syncthing/lib/ur"
 
@@ -32,34 +32,58 @@ import (
 
 const maxRequestSize = 1 << 20 // 1 MiB
 
+type cli struct {
+	Dir           string        `help:"Parent directory to store crash and failure reports in" env:"REPORTS_DIR" default:"."`
+	DSN           string        `help:"Sentry DSN" env:"SENTRY_DSN"`
+	Listen        string        `help:"HTTP listen address" default:":8080" env:"LISTEN_ADDRESS"`
+	MaxDiskFiles  int           `help:"Maximum number of reports on disk" default:"100000" env:"MAX_DISK_FILES"`
+	MaxDiskSizeMB int64         `help:"Maximum disk space to use for reports" default:"1024" env:"MAX_DISK_SIZE_MB"`
+	CleanInterval time.Duration `help:"Interval between cleaning up old reports" default:"12h" env:"CLEAN_INTERVAL"`
+	SentryQueue   int           `help:"Maximum number of reports to queue for sending to Sentry" default:"64" env:"SENTRY_QUEUE"`
+	DiskQueue     int           `help:"Maximum number of reports to queue for writing to disk" default:"64" env:"DISK_QUEUE"`
+}
+
 func main() {
-	dir := flag.String("dir", ".", "Directory to store reports in")
-	dsn := flag.String("dsn", "", "Sentry DSN")
-	listen := flag.String("listen", ":22039", "HTTP listen address")
-	flag.Parse()
+	var params cli
+	kong.Parse(&params)
 
 	mux := http.NewServeMux()
 
-	cr := &crashReceiver{
-		dir: *dir,
-		dsn: *dsn,
+	ds := &diskStore{
+		dir:      filepath.Join(params.Dir, "crash_reports"),
+		inbox:    make(chan diskEntry, params.DiskQueue),
+		maxFiles: params.MaxDiskFiles,
+		maxBytes: params.MaxDiskSizeMB << 20,
 	}
+	go ds.Serve(context.Background())
+
+	ss := &sentryService{
+		dsn:   params.DSN,
+		inbox: make(chan sentryRequest, params.SentryQueue),
+	}
+	go ss.Serve(context.Background())
+
+	cr := &crashReceiver{
+		store:  ds,
+		sentry: ss,
+	}
+
 	mux.Handle("/", cr)
 
-	if *dsn != "" {
-		mux.HandleFunc("/newcrash/failure", handleFailureFn(*dsn))
+	if params.DSN != "" {
+		mux.HandleFunc("/newcrash/failure", handleFailureFn(params.DSN, filepath.Join(params.Dir, "failure_reports")))
 	}
 
 	log.SetOutput(os.Stdout)
-	if err := http.ListenAndServe(*listen, mux); err != nil {
+	if err := http.ListenAndServe(params.Listen, mux); err != nil {
 		log.Fatalln("HTTP serve:", err)
 	}
 }
 
-func handleFailureFn(dsn string) func(w http.ResponseWriter, req *http.Request) {
+func handleFailureFn(dsn, failureDir string) func(w http.ResponseWriter, req *http.Request) {
 	return func(w http.ResponseWriter, req *http.Request) {
 		lr := io.LimitReader(req.Body, maxRequestSize)
-		bs, err := ioutil.ReadAll(lr)
+		bs, err := io.ReadAll(lr)
 		req.Body.Close()
 		if err != nil {
 			http.Error(w, err.Error(), 500)
@@ -89,7 +113,20 @@ func handleFailureFn(dsn string) func(w http.ResponseWriter, req *http.Request)
 			pkt.Extra = raven.Extra{
 				"count": r.Count,
 			}
-			pkt.Fingerprint = []string{r.Description}
+			for k, v := range r.Extra {
+				pkt.Extra[k] = v
+			}
+			if r.Goroutines != "" {
+				url, err := saveFailureWithGoroutines(r.FailureData, failureDir)
+				if err != nil {
+					log.Println("Saving failure report:", err)
+					http.Error(w, "Internal server error", http.StatusInternalServerError)
+					return
+				}
+				pkt.Extra["goroutinesURL"] = url
+			}
+			message := sanitizeMessageLDB(r.Description)
+			pkt.Fingerprint = []string{message}
 
 			if err := sendReport(dsn, pkt, userIDFor(req)); err != nil {
 				log.Println("Failed to send failure report:", err)
@@ -100,19 +137,15 @@ func handleFailureFn(dsn string) func(w http.ResponseWriter, req *http.Request)
 	}
 }
 
-// userIDFor returns a string we can use as the user ID for the purpose of
-// counting affected users. It's the truncated hash of a salt, the user
-// remote IP, and the current month.
-func userIDFor(req *http.Request) string {
-	addr := req.RemoteAddr
-	if fwd := req.Header.Get("x-forwarded-for"); fwd != "" {
-		addr = fwd
+func saveFailureWithGoroutines(data ur.FailureData, failureDir string) (string, error) {
+	bs := make([]byte, len(data.Description)+len(data.Goroutines))
+	copy(bs, data.Description)
+	copy(bs[len(data.Description):], data.Goroutines)
+	id := fmt.Sprintf("%x", sha256.Sum256(bs))
+	path := fullPathCompressed(failureDir, id)
+	err := compressAndWrite(bs, path)
+	if err != nil {
+		return "", err
 	}
-	if host, _, err := net.SplitHostPort(addr); err == nil {
-		addr = host
-	}
-	now := time.Now().Format("200601")
-	salt := "stcrashreporter"
-	hash := sha256.Sum256([]byte(salt + addr + now))
-	return fmt.Sprintf("%x", hash[:8])
+	return reportServer + path, nil
 }

cmd/stcrashreceiver/sentry.go

@@ -8,14 +8,16 @@ package main
 
 import (
 	"bytes"
+	"context"
 	"errors"
-	"io/ioutil"
+	"io"
+	"log"
 	"regexp"
 	"strings"
 	"sync"
 
 	raven "github.com/getsentry/raven-go"
-	"github.com/maruel/panicparse/stack"
+	"github.com/maruel/panicparse/v2/stack"
 )
 
 const reportServer = "https://crash.syncthing.net/report/"
@@ -31,6 +33,44 @@ var (
 	clientsMut sync.Mutex
 )
 
+type sentryService struct {
+	dsn   string
+	inbox chan sentryRequest
+}
+
+type sentryRequest struct {
+	reportID string
+	data     []byte
+}
+
+func (s *sentryService) Serve(ctx context.Context) {
+	for {
+		select {
+		case req := <-s.inbox:
+			pkt, err := parseCrashReport(req.reportID, req.data)
+			if err != nil {
+				log.Println("Failed to parse crash report:", err)
+				continue
+			}
+			if err := sendReport(s.dsn, pkt, req.reportID); err != nil {
+				log.Println("Failed to send crash report:", err)
+			}
+
+		case <-ctx.Done():
+			return
+		}
+	}
+}
+
+func (s *sentryService) Send(reportID string, data []byte) bool {
+	select {
+	case s.inbox <- sentryRequest{reportID, data}:
+		return true
+	default:
+		return false
+	}
+}
+
 func sendReport(dsn string, pkt *raven.Packet, userID string) error {
 	pkt.Interfaces = append(pkt.Interfaces, &raven.User{ID: userID})
 
@@ -93,10 +133,13 @@ func parseCrashReport(path string, report []byte) (*raven.Packet, error) {
 	}
 
 	r := bytes.NewReader(report)
-	ctx, err := stack.ParseDump(r, ioutil.Discard, false)
-	if err != nil {
+	ctx, _, err := stack.ScanSnapshot(r, io.Discard, stack.DefaultOpts())
+	if err != nil && err != io.EOF {
 		return nil, err
 	}
+	if ctx == nil || len(ctx.Goroutines) == 0 {
+		return nil, errors.New("no goroutines found")
+	}
 
 	// Lock the source code loader to the version we are processing here.
 	if version.commit != "" {
@@ -116,7 +159,7 @@ func parseCrashReport(path string, report []byte) (*raven.Packet, error) {
 		if gr.First {
 			trace.Frames = make([]*raven.StacktraceFrame, len(gr.Stack.Calls))
 			for i, sc := range gr.Stack.Calls {
-				trace.Frames[len(trace.Frames)-1-i] = raven.NewStacktraceFrame(0, sc.Func.Name(), sc.SrcPath, sc.Line, 3, nil)
+				trace.Frames[len(trace.Frames)-1-i] = raven.NewStacktraceFrame(0, sc.Func.Name, sc.RemoteSrcPath, sc.Line, 3, nil)
 			}
 			break
 		}
@@ -143,15 +186,20 @@ var (
 	ldbPathRe        = regexp.MustCompile(`(open|write|read) .+[\\/].+[\\/]index[^\\/]+[\\/][^\\/]+: `)
 )
 
-func crashReportFingerprint(message string) []string {
-	// Do not fingerprint on the stack in case of db corruption or fatal
-	// db io error - where it occurs doesn't matter.
-	orig := message
+func sanitizeMessageLDB(message string) string {
 	message = ldbPosRe.ReplaceAllString(message, "${1}x)")
 	message = ldbFileRe.ReplaceAllString(message, "${1}x${3}")
 	message = ldbChecksumRe.ReplaceAllString(message, "${1}X${3}X")
 	message = ldbInternalKeyRe.ReplaceAllString(message, "${1}x${2}x")
 	message = ldbPathRe.ReplaceAllString(message, "$1 x: ")
+	return message
+}
+
+func crashReportFingerprint(message string) []string {
+	// Do not fingerprint on the stack in case of db corruption or fatal
+	// db io error - where it occurs doesn't matter.
+	orig := message
+	message = sanitizeMessageLDB(message)
 	if message != orig {
 		return []string{message}
 	}

cmd/stcrashreceiver/sentry_test.go

@@ -8,7 +8,7 @@ package main
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"testing"
 )
 
@@ -59,7 +59,7 @@ func TestParseVersion(t *testing.T) {
 }
 
 func TestParseReport(t *testing.T) {
-	bs, err := ioutil.ReadFile("_testdata/panic.log")
+	bs, err := os.ReadFile("_testdata/panic.log")
 	if err != nil {
 		t.Fatal(err)
 	}

cmd/stcrashreceiver/sourcecodeloader.go

@@ -9,7 +9,7 @@ package main
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"path/filepath"
 	"strings"
@@ -80,7 +80,7 @@ func (l *githubSourceCodeLoader) Load(filename string, line, context int) ([][]b
 			fmt.Println("Loading source:", resp.Status)
 			return nil, 0
 		}
-		data, err := ioutil.ReadAll(resp.Body)
+		data, err := io.ReadAll(resp.Body)
 		_ = resp.Body.Close()
 		if err != nil {
 			fmt.Println("Loading source:", err.Error())

cmd/stcrashreceiver/stcrashreceiver.go

@@ -7,21 +7,16 @@
 package main
 
 import (
-	"bytes"
-	"compress/gzip"
 	"io"
-	"io/ioutil"
 	"log"
 	"net/http"
-	"os"
 	"path"
-	"path/filepath"
 	"strings"
 )
 
 type crashReceiver struct {
-	dir string
-	dsn string
+	store  *diskStore
+	sentry *sentryService
 }
 
 func (r *crashReceiver) ServeHTTP(w http.ResponseWriter, req *http.Request) {
@@ -44,99 +39,55 @@ func (r *crashReceiver) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 		return
 	}
 
-	// The location of the report on disk, compressed
-	fullPath := filepath.Join(r.dir, r.dirFor(reportID), reportID) + ".gz"
-
 	switch req.Method {
 	case http.MethodGet:
-		r.serveGet(fullPath, w, req)
+		r.serveGet(reportID, w, req)
 	case http.MethodHead:
-		r.serveHead(fullPath, w, req)
+		r.serveHead(reportID, w, req)
 	case http.MethodPut:
-		r.servePut(reportID, fullPath, w, req)
+		r.servePut(reportID, w, req)
 	default:
 		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
 	}
 }
 
 // serveGet responds to GET requests by serving the uncompressed report.
-func (r *crashReceiver) serveGet(fullPath string, w http.ResponseWriter, _ *http.Request) {
-	fd, err := os.Open(fullPath)
+func (r *crashReceiver) serveGet(reportID string, w http.ResponseWriter, _ *http.Request) {
+	bs, err := r.store.Get(reportID)
 	if err != nil {
 		http.Error(w, "Not found", http.StatusNotFound)
 		return
 	}
-
-	defer fd.Close()
-	gr, err := gzip.NewReader(fd)
-	if err != nil {
-		http.Error(w, "Internal server error", http.StatusInternalServerError)
-		return
-	}
-	_, _ = io.Copy(w, gr) // best effort
+	w.Write(bs)
 }
 
 // serveHead responds to HEAD requests by checking if the named report
 // already exists in the system.
-func (r *crashReceiver) serveHead(fullPath string, w http.ResponseWriter, _ *http.Request) {
-	if _, err := os.Lstat(fullPath); err != nil {
+func (r *crashReceiver) serveHead(reportID string, w http.ResponseWriter, _ *http.Request) {
+	if !r.store.Exists(reportID) {
 		http.Error(w, "Not found", http.StatusNotFound)
 	}
 }
 
 // servePut accepts and stores the given report.
-func (r *crashReceiver) servePut(reportID, fullPath string, w http.ResponseWriter, req *http.Request) {
-	// Ensure the destination directory exists
-	if err := os.MkdirAll(filepath.Dir(fullPath), 0755); err != nil {
-		log.Println("Creating directory:", err)
-		http.Error(w, "Internal server error", http.StatusInternalServerError)
-		return
-	}
-
+func (r *crashReceiver) servePut(reportID string, w http.ResponseWriter, req *http.Request) {
 	// Read at most maxRequestSize of report data.
 	log.Println("Receiving report", reportID)
 	lr := io.LimitReader(req.Body, maxRequestSize)
-	bs, err := ioutil.ReadAll(lr)
+	bs, err := io.ReadAll(lr)
 	if err != nil {
 		log.Println("Reading report:", err)
 		http.Error(w, "Internal server error", http.StatusInternalServerError)
 		return
 	}
 
-	// Compress the report for storage
-	buf := new(bytes.Buffer)
-	gw := gzip.NewWriter(buf)
-	_, _ = gw.Write(bs) // can't fail
-	gw.Close()
-
-	// Create an output file with the compressed report
-	err = ioutil.WriteFile(fullPath, buf.Bytes(), 0644)
-	if err != nil {
-		log.Println("Saving report:", err)
-		http.Error(w, "Internal server error", http.StatusInternalServerError)
-		return
+	// Store the report
+	if !r.store.Put(reportID, bs) {
+		log.Println("Failed to store report (queue full):", reportID)
 	}
 
 	// Send the report to Sentry
-	if r.dsn != "" {
-		// Remote ID
-		user := userIDFor(req)
-
-		go func() {
-			// There's no need for the client to have to wait for this part.
-			pkt, err := parseCrashReport(reportID, bs)
-			if err != nil {
-				log.Println("Failed to parse crash report:", err)
-				return
-			}
-			if err := sendReport(r.dsn, pkt, user); err != nil {
-				log.Println("Failed to send crash report:", err)
-			}
-		}()
+	if !r.sentry.Send(reportID, bs) {
+		log.Println("Failed to send report to sentry (queue full):", reportID)
 	}
 }
-
-// 01234567890abcdef... => 01/23
-func (r *crashReceiver) dirFor(base string) string {
-	return filepath.Join(base[0:2], base[2:4])
-}

cmd/stcrashreceiver/util.go

@@ -0,0 +1,57 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package main
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"net"
+	"net/http"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/syncthing/syncthing/lib/sha256"
+)
+
+// userIDFor returns a string we can use as the user ID for the purpose of
+// counting affected users. It's the truncated hash of a salt, the user
+// remote IP, and the current month.
+func userIDFor(req *http.Request) string {
+	addr := req.RemoteAddr
+	if fwd := req.Header.Get("x-forwarded-for"); fwd != "" {
+		addr = fwd
+	}
+	if host, _, err := net.SplitHostPort(addr); err == nil {
+		addr = host
+	}
+	now := time.Now().Format("200601")
+	salt := "stcrashreporter"
+	hash := sha256.Sum256([]byte(salt + addr + now))
+	return fmt.Sprintf("%x", hash[:8])
+}
+
+// 01234567890abcdef... => 01/23
+func dirFor(base string) string {
+	return filepath.Join(base[0:2], base[2:4])
+}
+
+func fullPathCompressed(root, reportID string) string {
+	return filepath.Join(root, dirFor(reportID), reportID) + ".gz"
+}
+
+func compressAndWrite(bs []byte, fullPath string) error {
+	// Compress the report for storage
+	buf := new(bytes.Buffer)
+	gw := gzip.NewWriter(buf)
+	_, _ = gw.Write(bs) // can't fail
+	gw.Close()
+
+	// Create an output file with the compressed report
+	return os.WriteFile(fullPath, buf.Bytes(), 0644)
+}

cmd/stdiscosrv/apisrv.go

@@ -10,8 +10,10 @@ import (
 	"bytes"
 	"context"
 	"crypto/tls"
+	"encoding/base64"
 	"encoding/json"
 	"encoding/pem"
+	"errors"
 	"fmt"
 	"log"
 	"math/rand"
@@ -66,7 +68,7 @@ func newAPISrv(addr string, cert tls.Certificate, db database, repl replicator,
 	}
 }
 
-func (s *apiSrv) Serve(ctx context.Context) error {
+func (s *apiSrv) Serve(_ context.Context) error {
 	if s.useHTTP {
 		listener, err := net.Listen("tcp", s.addr)
 		if err != nil {
@@ -229,10 +231,10 @@ func (s *apiSrv) handleGET(ctx context.Context, w http.ResponseWriter, req *http
 func (s *apiSrv) handlePOST(ctx context.Context, remoteAddr *net.TCPAddr, w http.ResponseWriter, req *http.Request) {
 	reqID := ctx.Value(idKey).(requestID)
 
-	rawCert := certificateBytes(req)
-	if rawCert == nil {
+	rawCert, err := certificateBytes(req)
+	if err != nil {
 		if debug {
-			log.Println(reqID, "no certificates")
+			log.Println(reqID, "no certificates:", err)
 		}
 		announceRequestsTotal.WithLabelValues("no_certificate").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
@@ -300,13 +302,13 @@ func (s *apiSrv) handleAnnounce(deviceID protocol.DeviceID, addresses []string)
 	return s.db.merge(key, dbAddrs, seen)
 }
 
-func handlePing(w http.ResponseWriter, r *http.Request) {
+func handlePing(w http.ResponseWriter, _ *http.Request) {
 	w.WriteHeader(204)
 }
 
-func certificateBytes(req *http.Request) []byte {
+func certificateBytes(req *http.Request) ([]byte, error) {
 	if req.TLS != nil && len(req.TLS.PeerCertificates) > 0 {
-		return req.TLS.PeerCertificates[0].Raw
+		return req.TLS.PeerCertificates[0].Raw, nil
 	}
 
 	var bs []byte
@@ -319,7 +321,7 @@ func certificateBytes(req *http.Request) []byte {
 			hdr, err := url.QueryUnescape(hdr)
 			if err != nil {
 				// Decoding failed
-				return nil
+				return nil, err
 			}
 
 			bs = []byte(hdr)
@@ -338,6 +340,15 @@ func certificateBytes(req *http.Request) []byte {
 				}
 			}
 		}
+	} else if hdr := req.Header.Get("X-Tls-Client-Cert-Der-Base64"); hdr != "" {
+		// Caddy {tls_client_certificate_der_base64}
+		hdr, err := base64.StdEncoding.DecodeString(hdr)
+		if err != nil {
+			// Decoding failed
+			return nil, err
+		}
+
+		bs = pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: hdr})
 	} else if hdr := req.Header.Get("X-Forwarded-Tls-Client-Cert"); hdr != "" {
 		// Traefik 2 passtlsclientcert
 		// The certificate is in PEM format with url encoding but without newlines
@@ -346,7 +357,7 @@ func certificateBytes(req *http.Request) []byte {
 		hdr, err := url.QueryUnescape(hdr)
 		if err != nil {
 			// Decoding failed
-			return nil
+			return nil, err
 		}
 
 		for i := 64; i < len(hdr); i += 65 {
@@ -359,16 +370,16 @@ func certificateBytes(req *http.Request) []byte {
 	}
 
 	if bs == nil {
-		return nil
+		return nil, errors.New("empty certificate header")
 	}
 
 	block, _ := pem.Decode(bs)
 	if block == nil {
 		// Decoding failed
-		return nil
+		return nil, errors.New("certificate decode result is empty")
 	}
 
-	return block.Bytes
+	return block.Bytes, nil
 }
 
 // fixupAddresses checks the list of addresses, removing invalid ones and
@@ -419,7 +430,7 @@ func fixupAddresses(remote *net.TCPAddr, addresses []string) []string {
 
 			// If zero port was specified, use remote port.
 			if port == "0" && remote.Port > 0 {
-				port = fmt.Sprintf("%d", remote.Port)
+				port = strconv.Itoa(remote.Port)
 			}
 		}
 

cmd/stdiscosrv/database.go

@@ -16,6 +16,7 @@ import (
 	"time"
 
 	"github.com/syndtr/goleveldb/leveldb"
+	"github.com/syndtr/goleveldb/leveldb/storage"
 	"github.com/syndtr/goleveldb/leveldb/util"
 )
 
@@ -54,6 +55,18 @@ func newLevelDBStore(dir string) (*levelDBStore, error) {
 	}, nil
 }
 
+func newMemoryLevelDBStore() (*levelDBStore, error) {
+	db, err := leveldb.Open(storage.NewMemStorage(), nil)
+	if err != nil {
+		return nil, err
+	}
+	return &levelDBStore{
+		db:    db,
+		inbox: make(chan func(), 16),
+		clock: defaultClock{},
+	}, nil
+}
+
 func (s *levelDBStore) put(key string, rec DatabaseRecord) error {
 	t0 := time.Now()
 	defer func() {

cmd/stdiscosrv/database.pb.go

@@ -510,10 +510,7 @@ func (m *DatabaseRecord) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthDatabase
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthDatabase
 			}
 			if (iNdEx + skippy) > l {
@@ -648,10 +645,7 @@ func (m *ReplicationRecord) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthDatabase
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthDatabase
 			}
 			if (iNdEx + skippy) > l {
@@ -752,10 +746,7 @@ func (m *DatabaseAddress) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthDatabase
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthDatabase
 			}
 			if (iNdEx + skippy) > l {

cmd/stdiscosrv/database_test.go

@@ -9,15 +9,12 @@ package main
 import (
 	"context"
 	"fmt"
-	"os"
 	"testing"
 	"time"
 )
 
 func TestDatabaseGetSet(t *testing.T) {
-	os.RemoveAll("_database")
-	defer os.RemoveAll("_database")
-	db, err := newLevelDBStore("_database")
+	db, err := newMemoryLevelDBStore()
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -119,7 +116,7 @@ func TestDatabaseGetSet(t *testing.T) {
 
 	// Put a record with misses
 
-	rec = DatabaseRecord{Misses: 42}
+	rec = DatabaseRecord{Misses: 42, Missed: tc.Now().UnixNano()}
 	if err := db.put("efgh", rec); err != nil {
 		t.Fatal(err)
 	}
@@ -209,5 +206,6 @@ func (t *testClock) wind(d time.Duration) {
 }
 
 func (t *testClock) Now() time.Time {
+	t.now = t.now.Add(time.Nanosecond)
 	return t.now
 }

cmd/stdiscosrv/main.go

@@ -116,8 +116,11 @@ func main() {
 	var replicationDestinations []string
 	parts := strings.Split(replicationPeers, ",")
 	for _, part := range parts {
-		fields := strings.Split(part, "@")
+		if part == "" {
+			continue
+		}
 
+		fields := strings.Split(part, "@")
 		switch len(fields) {
 		case 2:
 			// This is an id@address specification. Grab the address for the
@@ -137,6 +140,9 @@ func main() {
 			if err != nil {
 				log.Fatalln("Parsing device ID:", err)
 			}
+			if id == protocol.EmptyDeviceID {
+				log.Fatalf("Missing device ID for peer in %q", part)
+			}
 			allowedReplicationPeers = append(allowedReplicationPeers, id)
 
 		default:

cmd/stdiscosrv/replication.go

@@ -120,7 +120,7 @@ func (s *replicationSender) Serve(ctx context.Context) error {
 			if _, err := conn.Write(buf[:4+n]); err != nil {
 				replicationSendsTotal.WithLabelValues("error").Inc()
 				log.Println("Replication write:", err)
-				// Yes, we are loosing the replication event here.
+				// Yes, we are losing the replication event here.
 				return err
 			}
 			replicationSendsTotal.WithLabelValues("success").Inc()
@@ -135,7 +135,7 @@ func (s *replicationSender) String() string {
 	return fmt.Sprintf("replicationSender(%q)", s.dst)
 }
 
-func (s *replicationSender) send(key string, ps []DatabaseAddress, seen int64) {
+func (s *replicationSender) send(key string, ps []DatabaseAddress, _ int64) {
 	item := ReplicationRecord{
 		Key:       key,
 		Addresses: ps,

cmd/stdiscosrv/stats.go

@@ -10,6 +10,7 @@ import (
 	"os"
 
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/collectors"
 )
 
 var (
@@ -109,7 +110,7 @@ func init() {
 		databaseKeys, databaseStatisticsSeconds,
 		databaseOperations, databaseOperationSeconds)
 
-	processCollectorOpts := prometheus.ProcessCollectorOpts{
+	processCollectorOpts := collectors.ProcessCollectorOpts{
 		Namespace: "syncthing_discovery",
 		PidFn: func() (int, error) {
 			return os.Getpid(), nil
@@ -117,7 +118,7 @@ func init() {
 	}
 
 	prometheus.MustRegister(
-		prometheus.NewProcessCollector(processCollectorOpts),
+		collectors.NewProcessCollector(processCollectorOpts),
 	)
 
 }

cmd/stfinddevice/main.go

@@ -84,7 +84,7 @@ func checkServers(deviceID protocol.DeviceID, servers ...string) {
 }
 
 func checkServer(deviceID protocol.DeviceID, server string) checkResult {
-	disco, err := discover.NewGlobal(server, tls.Certificate{}, nil, events.NoopLogger)
+	disco, err := discover.NewGlobal(server, tls.Certificate{}, nil, events.NoopLogger, nil)
 	if err != nil {
 		return checkResult{error: err}
 	}

cmd/stfindignored/main.go

@@ -4,7 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
-// Commmand stfindignored lists ignored files under a given folder root.
+// Command stfindignored lists ignored files under a given folder root.
 package main
 
 import (

cmd/stgenfiles/main.go

@@ -66,7 +66,7 @@ func generateFiles(dir string, files, maxexp int, srcname string) error {
 }
 
 func generateOneFile(fd io.ReadSeeker, p1 string, s int64) error {
-	src := io.LimitReader(&inifiteReader{fd}, s)
+	src := io.LimitReader(&infiniteReader{fd}, s)
 	dst, err := os.Create(p1)
 	if err != nil {
 		return err
@@ -105,11 +105,11 @@ func readRand(bs []byte) (int, error) {
 	return len(bs), nil
 }
 
-type inifiteReader struct {
+type infiniteReader struct {
 	rd io.ReadSeeker
 }
 
-func (i *inifiteReader) Read(bs []byte) (int, error) {
+func (i *infiniteReader) Read(bs []byte) (int, error) {
 	n, err := i.rd.Read(bs)
 	if err == io.EOF {
 		err = nil

cmd/stindex/main.go

@@ -1,52 +0,0 @@
-// Copyright (C) 2014 The Syncthing Authors.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at https://mozilla.org/MPL/2.0/.
-
-package main
-
-import (
-	"flag"
-	"fmt"
-	"log"
-	"os"
-	"path/filepath"
-
-	"github.com/syncthing/syncthing/lib/db/backend"
-)
-
-func main() {
-	var mode string
-	log.SetFlags(0)
-	log.SetOutput(os.Stdout)
-
-	flag.StringVar(&mode, "mode", "dump", "Mode of operation: dump, dumpsize, idxck")
-
-	flag.Parse()
-
-	path := flag.Arg(0)
-	if path == "" {
-		path = filepath.Join(defaultConfigDir(), "index-v0.14.0.db")
-	}
-
-	ldb, err := backend.OpenLevelDBRO(path)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	switch mode {
-	case "dump":
-		dump(ldb)
-	case "dumpsize":
-		dumpsize(ldb)
-	case "idxck":
-		if !idxck(ldb) {
-			os.Exit(1)
-		}
-	case "account":
-		account(ldb)
-	default:
-		fmt.Println("Unknown mode")
-	}
-}

cmd/stindex/util.go

@@ -1,52 +0,0 @@
-// Copyright (C) 2015 The Syncthing Authors.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at https://mozilla.org/MPL/2.0/.
-
-package main
-
-import (
-	"log"
-	"os"
-	"path/filepath"
-	"runtime"
-
-	"github.com/syncthing/syncthing/lib/fs"
-)
-
-func nulString(bs []byte) string {
-	for i := range bs {
-		if bs[i] == 0 {
-			return string(bs[:i])
-		}
-	}
-	return string(bs)
-}
-
-func defaultConfigDir() string {
-	switch runtime.GOOS {
-	case "windows":
-		if p := os.Getenv("LocalAppData"); p != "" {
-			return filepath.Join(p, "Syncthing")
-		}
-		return filepath.Join(os.Getenv("AppData"), "Syncthing")
-
-	case "darwin":
-		dir, err := fs.ExpandTilde("~/Library/Application Support/Syncthing")
-		if err != nil {
-			log.Fatal(err)
-		}
-		return dir
-
-	default:
-		if xdgCfg := os.Getenv("XDG_CONFIG_HOME"); xdgCfg != "" {
-			return filepath.Join(xdgCfg, "syncthing")
-		}
-		dir, err := fs.ExpandTilde("~/.config/syncthing")
-		if err != nil {
-			log.Fatal(err)
-		}
-		return dir
-	}
-}

cmd/strelaypoolsrv/auto/noassets.go

@@ -4,7 +4,8 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
-//+build noassets
+//go:build noassets
+// +build noassets
 
 package auto
 

cmd/strelaypoolsrv/gui/index.html

@@ -46,18 +46,18 @@
       <h1>Relay Pool Data</h1>
       <div ng-if="relays === undefined" class="text-center">
         <img src="https://cdnjs.cloudflare.com/ajax/libs/galleriffic/2.0.1/css/loader.gif" alt=""/>
-        <p>Please wait while we gather data</p>
+        <p>Please wait while we gather data…</p>
       </div>
       <div>
         <div ng-show="relays !== undefined" class="ng-hide">
           <p>
             The relays listed on this page are not managed or vetted by the Syncthing project.
             Each relay is the responsibility of the relay operator.
-            Currently {{ relays.length }} relays online.
+            Currently {{ relays.length }} relays are online.
           </p>
         </div>
         <div id="map"></div> <!-- Can't hide the map, otherwise it freaks out -->
-        <p>The circle size represents how much bytes the relay transferred relative to other relays</p>
+        <p>The circle size represents how much bytes the relay has transferred relatively to other relays.</p>
       </div>
       <div>
         <table class="table table-striped table-condensed table">
@@ -188,7 +188,7 @@
       <hr>
       <p>
         This product includes GeoLite2 data created by MaxMind, available from
-        <a href="http://www.maxmind.com">http://www.maxmind.com</a>.
+        <a href="https://www.maxmind.com">https://www.maxmind.com</a>.
       </p>
     </div>
 

cmd/strelaypoolsrv/main.go

@@ -3,15 +3,12 @@
 package main
 
 import (
-	"compress/gzip"
 	"context"
 	"crypto/tls"
 	"crypto/x509"
 	"encoding/json"
 	"flag"
 	"fmt"
-	"io"
-	"io/ioutil"
 	"log"
 	"net"
 	"net/http"
@@ -20,11 +17,13 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
+	"sync/atomic"
 	"time"
 
+	lru "github.com/hashicorp/golang-lru/v2"
+	"github.com/syncthing/syncthing/lib/httpcache"
 	"github.com/syncthing/syncthing/lib/protocol"
 
-	"github.com/golang/groupcache/lru"
 	"github.com/oschwald/geoip2-golang"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
@@ -34,7 +33,6 @@ import (
 	"github.com/syncthing/syncthing/lib/relay/client"
 	"github.com/syncthing/syncthing/lib/sync"
 	"github.com/syncthing/syncthing/lib/tlsutil"
-	"golang.org/x/time/rate"
 )
 
 type location struct {
@@ -100,27 +98,13 @@ var (
 	dir               string
 	evictionTime      = time.Hour
 	debug             bool
-	getLRUSize        = 10 << 10
-	getLimitBurst     = 10
-	getLimitAvg       = 2
-	postLRUSize       = 1 << 10
-	postLimitBurst    = 2
-	postLimitAvg      = 2
-	getLimit          time.Duration
-	postLimit         time.Duration
 	permRelaysFile    string
 	ipHeader          string
 	geoipPath         string
 	proto             string
-	statsRefresh      = time.Minute / 2
-	requestQueueLen   = 10
-	requestProcessors = 1
-
-	getMut      = sync.NewMutex()
-	getLRUCache *lru.Cache
-
-	postMut      = sync.NewMutex()
-	postLRUCache *lru.Cache
+	statsRefresh      = time.Minute
+	requestQueueLen   = 64
+	requestProcessors = 8
 
 	requests chan request
 
@@ -128,6 +112,7 @@ var (
 	knownRelays     = make([]*relay, 0)
 	permanentRelays = make([]*relay, 0)
 	evictionTimers  = make(map[string]*time.Timer)
+	globalBlocklist = newErrorTracker(1000)
 )
 
 const (
@@ -142,13 +127,8 @@ func main() {
 	flag.StringVar(&dir, "keys", dir, "Directory where http-cert.pem and http-key.pem is stored for TLS listening")
 	flag.BoolVar(&debug, "debug", debug, "Enable debug output")
 	flag.DurationVar(&evictionTime, "eviction", evictionTime, "After how long the relay is evicted")
-	flag.IntVar(&getLRUSize, "get-limit-cache", getLRUSize, "Get request limiter cache size")
-	flag.IntVar(&getLimitAvg, "get-limit-avg", getLimitAvg, "Allowed average get request rate, per 10 s")
-	flag.IntVar(&getLimitBurst, "get-limit-burst", getLimitBurst, "Allowed burst get requests")
-	flag.IntVar(&postLRUSize, "post-limit-cache", postLRUSize, "Post request limiter cache size")
-	flag.IntVar(&postLimitAvg, "post-limit-avg", postLimitAvg, "Allowed average post request rate, per minute")
-	flag.IntVar(&postLimitBurst, "post-limit-burst", postLimitBurst, "Allowed burst post requests")
 	flag.StringVar(&permRelaysFile, "perm-relays", "", "Path to list of permanent relays")
+	flag.StringVar(&knownRelaysFile, "known-relays", knownRelaysFile, "Path to list of current relays")
 	flag.StringVar(&ipHeader, "ip-header", "", "Name of header which holds clients ip:port. Only meaningful when running behind a reverse proxy.")
 	flag.StringVar(&geoipPath, "geoip", "GeoLite2-City.mmdb", "Path to GeoLite2-City database")
 	flag.StringVar(&proto, "protocol", "tcp", "Protocol used for listening. 'tcp' for IPv4 and IPv6, 'tcp4' for IPv4, 'tcp6' for IPv6")
@@ -160,12 +140,6 @@ func main() {
 
 	requests = make(chan request, requestQueueLen)
 
-	getLimit = 10 * time.Second / time.Duration(getLimitAvg)
-	postLimit = time.Minute / time.Duration(postLimitAvg)
-
-	getLRUCache = lru.New(getLRUSize)
-	postLRUCache = lru.New(postLRUSize)
-
 	var listener net.Listener
 	var err error
 
@@ -241,7 +215,7 @@ func main() {
 
 	handler := http.NewServeMux()
 	handler.HandleFunc("/", handleAssets)
-	handler.HandleFunc("/endpoint", handleRequest)
+	handler.Handle("/endpoint", httpcache.SinglePath(http.HandlerFunc(handleRequest), 15*time.Second))
 	handler.HandleFunc("/metrics", handleMetrics)
 
 	srv := http.Server{
@@ -292,21 +266,17 @@ func handleRequest(w http.ResponseWriter, r *http.Request) {
 	}()
 
 	if ipHeader != "" {
-		r.RemoteAddr = r.Header.Get(ipHeader)
+		hdr := r.Header.Get(ipHeader)
+		fields := strings.Split(hdr, ",")
+		if len(fields) > 0 {
+			r.RemoteAddr = strings.TrimSpace(fields[len(fields)-1])
+		}
 	}
 	w.Header().Set("Access-Control-Allow-Origin", "*")
 	switch r.Method {
 	case "GET":
-		if limit(r.RemoteAddr, getLRUCache, getMut, getLimit, getLimitBurst) {
-			w.WriteHeader(httpStatusEnhanceYourCalm)
-			return
-		}
 		handleGetRequest(w, r)
 	case "POST":
-		if limit(r.RemoteAddr, postLRUCache, postMut, postLimit, postLimitBurst) {
-			w.WriteHeader(httpStatusEnhanceYourCalm)
-			return
-		}
 		handlePostRequest(w, r)
 	default:
 		if debug {
@@ -328,20 +298,28 @@ func handleGetRequest(rw http.ResponseWriter, r *http.Request) {
 	// Shuffle
 	rand.Shuffle(relays)
 
-	w := io.Writer(rw)
-	if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
-		rw.Header().Set("Content-Encoding", "gzip")
-		gw := gzip.NewWriter(rw)
-		defer gw.Close()
-		w = gw
-	}
-
-	_ = json.NewEncoder(w).Encode(map[string][]*relay{
+	_ = json.NewEncoder(rw).Encode(map[string][]*relay{
 		"relays": relays,
 	})
 }
 
 func handlePostRequest(w http.ResponseWriter, r *http.Request) {
+	// Get the IP address of the client
+	rhost := r.RemoteAddr
+	if host, _, err := net.SplitHostPort(rhost); err == nil {
+		rhost = host
+	}
+
+	// Check the black list. A client is blacklisted if their last 10
+	// attempts to join have all failed. The "Unauthorized" status return
+	// causes strelaysrv to cease attempting to join.
+	if globalBlocklist.IsBlocked(rhost) {
+		log.Println("Rejected blocked client", rhost)
+		http.Error(w, "Too many errors", http.StatusUnauthorized)
+		globalBlocklist.ClearErrors(rhost)
+		return
+	}
+
 	var relayCert *x509.Certificate
 	if r.TLS != nil && len(r.TLS.PeerCertificates) > 0 {
 		relayCert = r.TLS.PeerCertificates[0]
@@ -369,6 +347,11 @@ func handlePostRequest(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// Canonicalize the URL. In particular, parse and re-encode the query
+	// string so that it's guaranteed to be valid.
+	uri.RawQuery = uri.Query().Encode()
+	newRelay.URL = uri.String()
+
 	if relayCert != nil {
 		advertisedId := uri.Query().Get("id")
 		idFromCert := protocol.NewDeviceID(relayCert.Raw).String()
@@ -388,12 +371,6 @@ func handlePostRequest(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Get the IP address of the client
-	rhost := r.RemoteAddr
-	if host, _, err := net.SplitHostPort(rhost); err == nil {
-		rhost = host
-	}
-
 	ip := net.ParseIP(host)
 	// The client did not provide an IP address, use the IP address of the client.
 	if ip == nil || ip.IsUnspecified() {
@@ -425,10 +402,14 @@ func handlePostRequest(w http.ResponseWriter, r *http.Request) {
 	case requests <- request{&newRelay, reschan, prometheus.NewTimer(relayTestActionsSeconds.WithLabelValues("queue"))}:
 		result := <-reschan
 		if result.err != nil {
+			log.Println("Join from", r.RemoteAddr, "failed:", result.err)
+			globalBlocklist.AddError(rhost)
 			relayTestsTotal.WithLabelValues("failed").Inc()
 			http.Error(w, result.err.Error(), http.StatusBadRequest)
 			return
 		}
+		log.Println("Join from", r.RemoteAddr, "succeeded")
+		globalBlocklist.ClearErrors(rhost)
 		relayTestsTotal.WithLabelValues("success").Inc()
 		w.Header().Set("Content-Type", "application/json; charset=utf-8")
 		json.NewEncoder(w).Encode(map[string]time.Duration{
@@ -542,25 +523,8 @@ func evict(relay *relay) func() {
 	}
 }
 
-func limit(addr string, cache *lru.Cache, lock sync.Mutex, intv time.Duration, burst int) bool {
-	if host, _, err := net.SplitHostPort(addr); err == nil {
-		addr = host
-	}
-
-	lock.Lock()
-	v, _ := cache.Get(addr)
-	bkt, ok := v.(*rate.Limiter)
-	if !ok {
-		bkt = rate.NewLimiter(rate.Every(intv), burst)
-		cache.Add(addr, bkt)
-	}
-	lock.Unlock()
-
-	return !bkt.Allow()
-}
-
 func loadRelays(file string) []*relay {
-	content, err := ioutil.ReadFile(file)
+	content, err := os.ReadFile(file)
 	if err != nil {
 		log.Println("Failed to load relays: " + err.Error())
 		return nil
@@ -568,7 +532,7 @@ func loadRelays(file string) []*relay {
 
 	var relays []*relay
 	for _, line := range strings.Split(string(content), "\n") {
-		if len(line) == 0 {
+		if line == "" {
 			continue
 		}
 
@@ -598,11 +562,11 @@ func saveRelays(file string, relays []*relay) error {
 	for _, relay := range relays {
 		content += relay.uri.String() + "\n"
 	}
-	return ioutil.WriteFile(file, []byte(content), 0777)
+	return os.WriteFile(file, []byte(content), 0o777)
 }
 
 func createTestCertificate() tls.Certificate {
-	tmpDir, err := ioutil.TempDir("", "relaypoolsrv")
+	tmpDir, err := os.MkdirTemp("", "relaypoolsrv")
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -657,3 +621,42 @@ func (lrw *loggingResponseWriter) WriteHeader(code int) {
 	lrw.statusCode = code
 	lrw.ResponseWriter.WriteHeader(code)
 }
+
+type errorTracker struct {
+	errors *lru.TwoQueueCache[string, *errorCounter]
+}
+
+type errorCounter struct {
+	count atomic.Int32
+}
+
+func newErrorTracker(size int) *errorTracker {
+	cache, err := lru.New2Q[string, *errorCounter](size)
+	if err != nil {
+		panic(err)
+	}
+	return &errorTracker{
+		errors: cache,
+	}
+}
+
+func (b *errorTracker) AddError(host string) {
+	entry, ok := b.errors.Get(host)
+	if !ok {
+		entry = &errorCounter{}
+		b.errors.Add(host, entry)
+	}
+	c := entry.count.Add(1)
+	log.Printf("Error count for %s is now %d", host, c)
+}
+
+func (b *errorTracker) ClearErrors(host string) {
+	b.errors.Remove(host)
+}
+
+func (b *errorTracker) IsBlocked(host string) bool {
+	if be, ok := b.errors.Get(host); ok {
+		return be.count.Load() > 10
+	}
+	return false
+}

cmd/strelaypoolsrv/main_test.go

@@ -11,6 +11,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http/httptest"
+	"net/url"
 	"strings"
 	"sync"
 	"testing"
@@ -65,3 +66,29 @@ func TestHandleGetRequest(t *testing.T) {
 		}
 	}
 }
+
+func TestCanonicalizeQueryValues(t *testing.T) {
+	// This just demonstrates and validates the uri.Parse/String stuff in
+	// regards to query strings.
+
+	in := "http://example.com/?some weird= query^value"
+	exp := "http://example.com/?some+weird=+query%5Evalue"
+
+	uri, err := url.Parse(in)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	str := uri.String()
+	if str != in {
+		// Just re-encoding the URL doesn't sanitize the query string.
+		t.Errorf("expected %q, got %q", in, str)
+	}
+
+	uri.RawQuery = uri.Query().Encode()
+	str = uri.String()
+	if str != exp {
+		// The query string is now in correct format.
+		t.Errorf("expected %q, got %q", exp, str)
+	}
+}

cmd/strelaypoolsrv/stats.go

@@ -10,11 +10,12 @@ import (
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/collectors"
 	"github.com/syncthing/syncthing/lib/sync"
 )
 
 func init() {
-	processCollectorOpts := prometheus.ProcessCollectorOpts{
+	processCollectorOpts := collectors.ProcessCollectorOpts{
 		Namespace: "syncthing_relaypoolsrv",
 		PidFn: func() (int, error) {
 			return os.Getpid(), nil
@@ -22,7 +23,7 @@ func init() {
 	}
 
 	prometheus.MustRegister(
-		prometheus.NewProcessCollector(processCollectorOpts),
+		collectors.NewProcessCollector(processCollectorOpts),
 	)
 }
 

cmd/strelaysrv/listener.go

@@ -20,10 +20,10 @@ import (
 var (
 	outboxesMut    = sync.RWMutex{}
 	outboxes       = make(map[syncthingprotocol.DeviceID]chan interface{})
-	numConnections int64
+	numConnections atomic.Int64
 )
 
-func listener(proto, addr string, config *tls.Config) {
+func listener(_, addr string, config *tls.Config, token string) {
 	tcpListener, err := net.Listen("tcp", addr)
 	if err != nil {
 		log.Fatalln(err)
@@ -49,7 +49,7 @@ func listener(proto, addr string, config *tls.Config) {
 		}
 
 		if isTLS {
-			go protocolConnectionHandler(conn, config)
+			go protocolConnectionHandler(conn, config, token)
 		} else {
 			go sessionConnectionHandler(conn)
 		}
@@ -57,7 +57,7 @@ func listener(proto, addr string, config *tls.Config) {
 	}
 }
 
-func protocolConnectionHandler(tcpConn net.Conn, config *tls.Config) {
+func protocolConnectionHandler(tcpConn net.Conn, config *tls.Config, token string) {
 	conn := tls.Server(tcpConn, config)
 	if err := conn.SetDeadline(time.Now().Add(messageTimeout)); err != nil {
 		if debug {
@@ -76,7 +76,7 @@ func protocolConnectionHandler(tcpConn net.Conn, config *tls.Config) {
 	}
 
 	state := conn.ConnectionState()
-	if (!state.NegotiatedProtocolIsMutual || state.NegotiatedProtocol != protocol.ProtocolName) && debug {
+	if debug && state.NegotiatedProtocol != protocol.ProtocolName {
 		log.Println("Protocol negotiation error")
 	}
 
@@ -119,7 +119,16 @@ func protocolConnectionHandler(tcpConn net.Conn, config *tls.Config) {
 
 			switch msg := message.(type) {
 			case protocol.JoinRelayRequest:
-				if atomic.LoadInt32(&overLimit) > 0 {
+				if token != "" && msg.Token != token {
+					if debug {
+						log.Printf("invalid token %s\n", msg.Token)
+					}
+					protocol.WriteMessage(conn, protocol.ResponseWrongToken)
+					conn.Close()
+					continue
+				}
+
+				if overLimit.Load() {
 					protocol.WriteMessage(conn, protocol.RelayFull{})
 					if debug {
 						log.Println("Refusing join request from", id, "due to being over limits")
@@ -258,7 +267,7 @@ func protocolConnectionHandler(tcpConn net.Conn, config *tls.Config) {
 				conn.Close()
 			}
 
-			if atomic.LoadInt32(&overLimit) > 0 && !hasSessions(id) {
+			if overLimit.Load() && !hasSessions(id) {
 				if debug {
 					log.Println("Dropping", id, "as it has no sessions and we are over our limits")
 				}
@@ -351,8 +360,8 @@ func sessionConnectionHandler(conn net.Conn) {
 }
 
 func messageReader(conn net.Conn, messages chan<- interface{}, errors chan<- error) {
-	atomic.AddInt64(&numConnections, 1)
-	defer atomic.AddInt64(&numConnections, -1)
+	numConnections.Add(1)
+	defer numConnections.Add(-1)
 
 	for {
 		msg, err := protocol.ReadMessage(conn)

cmd/strelaysrv/main.go

@@ -14,7 +14,6 @@ import (
 	"os"
 	"os/signal"
 	"path/filepath"
-	"runtime"
 	"strings"
 	"sync/atomic"
 	"syscall"
@@ -50,13 +49,14 @@ var (
 
 	sessionLimitBps   int
 	globalLimitBps    int
-	overLimit         int32
+	overLimit         atomic.Bool
 	descriptorLimit   int64
 	sessionLimiter    *rate.Limiter
 	globalLimiter     *rate.Limiter
 	networkBufferSize int
 
 	statusAddr       string
+	token            string
 	poolAddrs        string
 	pools            []string
 	providedBy       string
@@ -90,6 +90,7 @@ func main() {
 	flag.IntVar(&globalLimitBps, "global-rate", globalLimitBps, "Global rate limit, in bytes/s")
 	flag.BoolVar(&debug, "debug", debug, "Enable debug output")
 	flag.StringVar(&statusAddr, "status-srv", ":22070", "Listen address for status service (blank to disable)")
+	flag.StringVar(&token, "token", "", "Token to restrict access to the relay (optional). Disables joining any pools.")
 	flag.StringVar(&poolAddrs, "pools", defaultPoolAddrs, "Comma separated list of relay pool addresses to join")
 	flag.StringVar(&providedBy, "provided-by", "", "An optional description about who provides the relay")
 	flag.StringVar(&extAddress, "ext-address", "", "An optional address to advertise as being available on.\n\tAllows listening on an unprivileged port with port forwarding from e.g. 443, and be connected to on port 443.")
@@ -146,7 +147,7 @@ func main() {
 		log.Println("Connection limit", descriptorLimit)
 
 		go monitorLimits()
-	} else if err != nil && runtime.GOOS != "windows" {
+	} else if err != nil && !build.IsWindows {
 		log.Println("Assuming no connection limit, due to error retrieving rlimits:", err)
 	}
 
@@ -200,7 +201,7 @@ func main() {
 		go natSvc.Serve(ctx)
 		defer cancel()
 		found := make(chan struct{})
-		mapping.OnChanged(func(_ *nat.Mapping, _, _ []nat.Address) {
+		mapping.OnChanged(func() {
 			select {
 			case found <- struct{}{}:
 			default:
@@ -230,14 +231,37 @@ func main() {
 		go statusService(statusAddr)
 	}
 
-	uri, err := url.Parse(fmt.Sprintf("relay://%s/?id=%s&pingInterval=%s&networkTimeout=%s&sessionLimitBps=%d&globalLimitBps=%d&statusAddr=%s&providedBy=%s", mapping.Address(), id, pingInterval, networkTimeout, sessionLimitBps, globalLimitBps, statusAddr, providedBy))
+	uri, err := url.Parse(fmt.Sprintf("relay://%s/", mapping.Address()))
 	if err != nil {
 		log.Fatalln("Failed to construct URI", err)
 		return
 	}
 
+	// Add properly encoded query string parameters to URL.
+	query := make(url.Values)
+	query.Set("id", id.String())
+	query.Set("pingInterval", pingInterval.String())
+	query.Set("networkTimeout", networkTimeout.String())
+	if sessionLimitBps > 0 {
+		query.Set("sessionLimitBps", fmt.Sprint(sessionLimitBps))
+	}
+	if globalLimitBps > 0 {
+		query.Set("globalLimitBps", fmt.Sprint(globalLimitBps))
+	}
+	if statusAddr != "" {
+		query.Set("statusAddr", statusAddr)
+	}
+	if providedBy != "" {
+		query.Set("providedBy", providedBy)
+	}
+	uri.RawQuery = query.Encode()
+
 	log.Println("URI:", uri.String())
 
+	if token != "" {
+		poolAddrs = ""
+	}
+
 	if poolAddrs == defaultPoolAddrs {
 		log.Println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")
 		log.Println("!!  Joining default relay pools, this relay will be available for public use. !!")
@@ -253,7 +277,7 @@ func main() {
 		}
 	}
 
-	go listener(proto, listen, tlsCfg)
+	go listener(proto, listen, tlsCfg, token)
 
 	sigs := make(chan os.Signal, 1)
 	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
@@ -284,10 +308,10 @@ func main() {
 func monitorLimits() {
 	limitCheckTimer = time.NewTimer(time.Minute)
 	for range limitCheckTimer.C {
-		if atomic.LoadInt64(&numConnections)+atomic.LoadInt64(&numProxies) > descriptorLimit {
-			atomic.StoreInt32(&overLimit, 1)
+		if numConnections.Load()+numProxies.Load() > descriptorLimit {
+			overLimit.Store(true)
 			log.Println("Gone past our connection limits. Starting to refuse new/drop idle connections.")
-		} else if atomic.CompareAndSwapInt32(&overLimit, 1, 0) {
+		} else if overLimit.CompareAndSwap(true, false) {
 			log.Println("Dropped below our connection limits. Accepting new connections.")
 		}
 		limitCheckTimer.Reset(time.Minute)

cmd/strelaysrv/pool.go

@@ -6,7 +6,7 @@ import (
 	"bytes"
 	"crypto/tls"
 	"encoding/json"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"net/url"
@@ -56,7 +56,7 @@ func poolHandler(pool string, uri *url.URL, mapping mapping, ownCert tls.Certifi
 			continue
 		}
 
-		bs, err := ioutil.ReadAll(resp.Body)
+		bs, err := io.ReadAll(resp.Body)
 		resp.Body.Close()
 		if err != nil {
 			log.Printf("Error joining pool %v: reading response: %v", pool, err)
@@ -74,9 +74,8 @@ func poolHandler(pool string, uri *url.URL, mapping mapping, ownCert tls.Certifi
 				log.Printf("Joined pool %s, rejoining in %v", pool, rejoin)
 				time.Sleep(rejoin)
 				continue
-			} else {
-				log.Printf("Joined pool %s, failed to deserialize response: %v", pool, err)
 			}
+			log.Printf("Joined pool %s, failed to deserialize response: %v", pool, err)
 
 		case http.StatusInternalServerError:
 			log.Printf("Failed to join %v: server error", pool)

cmd/strelaysrv/session.go

@@ -23,8 +23,8 @@ var (
 	sessionMut      = sync.RWMutex{}
 	activeSessions  = make([]*session, 0)
 	pendingSessions = make(map[string]*session)
-	numProxies      int64
-	bytesProxied    int64
+	numProxies      atomic.Int64
+	bytesProxied    atomic.Int64
 )
 
 func newSession(serverid, clientid syncthingprotocol.DeviceID, sessionRateLimit, globalRateLimit *rate.Limiter) *session {
@@ -251,8 +251,8 @@ func (s *session) proxy(c1, c2 net.Conn) error {
 		log.Println("Proxy", c1.RemoteAddr(), "->", c2.RemoteAddr())
 	}
 
-	atomic.AddInt64(&numProxies, 1)
-	defer atomic.AddInt64(&numProxies, -1)
+	numProxies.Add(1)
+	defer numProxies.Add(-1)
 
 	buf := make([]byte, networkBufferSize)
 	for {
@@ -262,7 +262,7 @@ func (s *session) proxy(c1, c2 net.Conn) error {
 			return err
 		}
 
-		atomic.AddInt64(&bytesProxied, int64(n))
+		bytesProxied.Add(int64(n))
 
 		if debug {
 			log.Printf("%d bytes from %s to %s", n, c1.RemoteAddr(), c2.RemoteAddr())

cmd/strelaysrv/status.go

@@ -36,7 +36,7 @@ func statusService(addr string) {
 	}
 }
 
-func getStatus(w http.ResponseWriter, r *http.Request) {
+func getStatus(w http.ResponseWriter, _ *http.Request) {
 	w.Header().Set("Access-Control-Allow-Origin", "*")
 	status := make(map[string]interface{})
 
@@ -51,9 +51,9 @@ func getStatus(w http.ResponseWriter, r *http.Request) {
 	status["numPendingSessionKeys"] = len(pendingSessions)
 	status["numActiveSessions"] = len(activeSessions)
 	sessionMut.Unlock()
-	status["numConnections"] = atomic.LoadInt64(&numConnections)
-	status["numProxies"] = atomic.LoadInt64(&numProxies)
-	status["bytesProxied"] = atomic.LoadInt64(&bytesProxied)
+	status["numConnections"] = numConnections.Load()
+	status["numProxies"] = numProxies.Load()
+	status["bytesProxied"] = bytesProxied.Load()
 	status["goVersion"] = runtime.Version()
 	status["goOS"] = runtime.GOOS
 	status["goArch"] = runtime.GOARCH
@@ -88,13 +88,13 @@ func getStatus(w http.ResponseWriter, r *http.Request) {
 }
 
 type rateCalculator struct {
-	counter   *int64 // atomic, must remain 64-bit aligned
+	counter   *atomic.Int64
 	rates     []int64
 	prev      int64
 	startTime time.Time
 }
 
-func newRateCalculator(keepIntervals int, interval time.Duration, counter *int64) *rateCalculator {
+func newRateCalculator(keepIntervals int, interval time.Duration, counter *atomic.Int64) *rateCalculator {
 	r := &rateCalculator{
 		rates:     make([]int64, keepIntervals),
 		counter:   counter,
@@ -112,7 +112,7 @@ func (r *rateCalculator) updateRates(interval time.Duration) {
 		next := now.Truncate(interval).Add(interval)
 		time.Sleep(next.Sub(now))
 
-		cur := atomic.LoadInt64(r.counter)
+		cur := r.counter.Load()
 		rate := int64(float64(cur-r.prev) / interval.Seconds())
 		copy(r.rates[1:], r.rates)
 		r.rates[0] = rate

cmd/strelaysrv/testutil/main.go

@@ -57,7 +57,7 @@ func main() {
 
 	if join {
 		log.Println("Creating client")
-		relay, err := client.NewClient(uri, []tls.Certificate{cert}, nil, 10*time.Second)
+		relay, err := client.NewClient(uri, []tls.Certificate{cert}, 10*time.Second)
 		if err != nil {
 			log.Fatal(err)
 		}
@@ -127,10 +127,6 @@ func stdinReader(c chan<- string) {
 }
 
 func connectToStdio(stdin <-chan string, conn net.Conn) {
-	go func() {
-
-	}()
-
 	buf := make([]byte, 1024)
 	for {
 		conn.SetReadDeadline(time.Now().Add(time.Millisecond))

cmd/stsigtool/main.go

@@ -9,7 +9,6 @@ package main
 import (
 	"flag"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 
@@ -69,7 +68,7 @@ func gen() {
 }
 
 func sign(keyname, dataname string) {
-	privkey, err := ioutil.ReadFile(keyname)
+	privkey, err := os.ReadFile(keyname)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -95,7 +94,7 @@ func sign(keyname, dataname string) {
 }
 
 func verifyWithFile(signame, dataname, keyname string) {
-	pubkey, err := ioutil.ReadFile(keyname)
+	pubkey, err := os.ReadFile(keyname)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -103,7 +102,7 @@ func verifyWithFile(signame, dataname, keyname string) {
 }
 
 func verifyWithKey(signame, dataname string, pubkey []byte) {
-	sig, err := ioutil.ReadFile(signame)
+	sig, err := os.ReadFile(signame)
 	if err != nil {
 		log.Fatal(err)
 	}

cmd/stupgrades/main.go

@@ -7,31 +7,112 @@
 package main
 
 import (
+	"bytes"
 	"encoding/json"
-	"flag"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
 	"os"
 	"sort"
+	"strings"
+	"time"
 
+	"github.com/alecthomas/kong"
+	"github.com/syncthing/syncthing/lib/httpcache"
 	"github.com/syncthing/syncthing/lib/upgrade"
 )
 
-const defaultURL = "https://api.github.com/repos/syncthing/syncthing/releases?per_page=25"
+type cli struct {
+	Listen    string        `default:":8080" help:"Listen address"`
+	URL       string        `short:"u" default:"https://api.github.com/repos/syncthing/syncthing/releases?per_page=25" help:"GitHub releases url"`
+	Forward   []string      `short:"f" help:"Forwarded pages, format: /path->https://example/com/url"`
+	CacheTime time.Duration `default:"15m" help:"Cache time"`
+}
 
 func main() {
-	url := flag.String("u", defaultURL, "GitHub releases url")
-	flag.Parse()
-
-	rels := upgrade.FetchLatestReleases(*url, "")
-	if rels == nil {
-		// An error was already logged
+	var params cli
+	kong.Parse(&params)
+	if err := server(&params); err != nil {
+		fmt.Printf("Error: %v\n", err)
 		os.Exit(1)
 	}
+}
+
+func server(params *cli) error {
+	http.Handle("/meta.json", httpcache.SinglePath(&githubReleases{url: params.URL}, params.CacheTime))
+
+	for _, fwd := range params.Forward {
+		path, url, ok := strings.Cut(fwd, "->")
+		if !ok {
+			return fmt.Errorf("invalid forward: %q", fwd)
+		}
+		http.Handle(path, httpcache.SinglePath(&proxy{url: url}, params.CacheTime))
+	}
+
+	return http.ListenAndServe(params.Listen, nil)
+}
+
+type githubReleases struct {
+	url string
+}
+
+func (p *githubReleases) ServeHTTP(w http.ResponseWriter, req *http.Request) {
+	log.Println("Fetching", p.url)
+	rels := upgrade.FetchLatestReleases(p.url, "")
+	if rels == nil {
+		http.Error(w, "no releases", http.StatusInternalServerError)
+		return
+	}
 
 	sort.Sort(upgrade.SortByRelease(rels))
 	rels = filterForLatest(rels)
 
-	if err := json.NewEncoder(os.Stdout).Encode(rels); err != nil {
-		os.Exit(1)
+	buf := new(bytes.Buffer)
+	_ = json.NewEncoder(buf).Encode(rels)
+
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "GET")
+	w.Write(buf.Bytes())
+}
+
+type proxy struct {
+	url string
+}
+
+func (p *proxy) ServeHTTP(w http.ResponseWriter, req *http.Request) {
+	log.Println("Fetching", p.url)
+	req, err := http.NewRequestWithContext(req.Context(), http.MethodGet, p.url, nil)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	defer resp.Body.Close()
+
+	ct := resp.Header.Get("Content-Type")
+	w.Header().Set("Content-Type", ct)
+	if resp.StatusCode == http.StatusOK {
+		w.Header().Set("Cache-Control", "public, max-age=900")
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Methods", "GET")
+	}
+	w.WriteHeader(resp.StatusCode)
+	if strings.HasPrefix(ct, "application/json") {
+		// Special JSON handling; clean it up a bit.
+		var v interface{}
+		if err := json.NewDecoder(resp.Body).Decode(&v); err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		_ = json.NewEncoder(w).Encode(v)
+	} else {
+		_, _ = io.Copy(w, resp.Body)
 	}
 }
 

cmd/stvanity/main.go

@@ -44,7 +44,7 @@ func main() {
 
 	found := make(chan result)
 	stop := make(chan struct{})
-	var count int64
+	var count atomic.Int64
 
 	// Print periodic progress reports.
 	go printProgress(prefix, &count)
@@ -72,7 +72,7 @@ func main() {
 // Try certificates until one is found that has the prefix at the start of
 // the resulting device ID. Increments count atomically, sends the result to
 // found, returns when stop is closed.
-func generatePrefixed(prefix string, count *int64, found chan<- result, stop <-chan struct{}) {
+func generatePrefixed(prefix string, count *atomic.Int64, found chan<- result, stop <-chan struct{}) {
 	notBefore := time.Now()
 	notAfter := time.Date(2049, 12, 31, 23, 59, 59, 0, time.UTC)
 
@@ -109,7 +109,7 @@ func generatePrefixed(prefix string, count *int64, found chan<- result, stop <-c
 		}
 
 		id := protocol.NewDeviceID(derBytes)
-		atomic.AddInt64(count, 1)
+		count.Add(1)
 
 		if strings.HasPrefix(id.String(), prefix) {
 			select {
@@ -121,7 +121,7 @@ func generatePrefixed(prefix string, count *int64, found chan<- result, stop <-c
 	}
 }
 
-func printProgress(prefix string, count *int64) {
+func printProgress(prefix string, count *atomic.Int64) {
 	started := time.Now()
 	wantBits := 5 * len(prefix)
 	if wantBits > 63 {
@@ -132,7 +132,7 @@ func printProgress(prefix string, count *int64) {
 	fmt.Printf("Want %d bits for prefix %q, about %.2g certs to test (statistically speaking)\n", wantBits, prefix, expectedIterations)
 
 	for range time.NewTicker(15 * time.Second).C {
-		tried := atomic.LoadInt64(count)
+		tried := count.Load()
 		elapsed := time.Since(started)
 		rate := float64(tried) / elapsed.Seconds()
 		expected := timeStr(expectedIterations / rate)

cmd/syncthing/cli/client.go

@@ -10,40 +10,98 @@ import (
 	"bytes"
 	"context"
 	"crypto/tls"
+	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"net"
 	"net/http"
 	"strings"
 
 	"github.com/syncthing/syncthing/lib/config"
+	"github.com/syncthing/syncthing/lib/events"
+	"github.com/syncthing/syncthing/lib/locations"
+	"github.com/syncthing/syncthing/lib/protocol"
 )
 
-type APIClient struct {
+type APIClient interface {
+	Get(url string) (*http.Response, error)
+	Post(url, body string) (*http.Response, error)
+	PutJSON(url string, o interface{}) (*http.Response, error)
+}
+
+type apiClient struct {
 	http.Client
 	cfg    config.GUIConfiguration
 	apikey string
 }
 
-func getClient(cfg config.GUIConfiguration) *APIClient {
+type apiClientFactory struct {
+	cfg config.GUIConfiguration
+}
+
+func (f *apiClientFactory) getClient() (APIClient, error) {
+	// Now if the API key and address is not provided (we are not connecting to a remote instance),
+	// try to rip it out of the config.
+	if f.cfg.RawAddress == "" && f.cfg.APIKey == "" {
+		var err error
+		f.cfg, err = loadGUIConfig()
+		if err != nil {
+			return nil, err
+		}
+	} else if f.cfg.Address() == "" || f.cfg.APIKey == "" {
+		return nil, errors.New("Both --gui-address and --gui-apikey should be specified")
+	}
+
 	httpClient := http.Client{
 		Transport: &http.Transport{
 			TLSClientConfig: &tls.Config{
 				InsecureSkipVerify: true,
 			},
 			DialContext: func(_ context.Context, _, _ string) (net.Conn, error) {
-				return net.Dial(cfg.Network(), cfg.Address())
+				return net.Dial(f.cfg.Network(), f.cfg.Address())
 			},
 		},
 	}
-	return &APIClient{
+	return &apiClient{
 		Client: httpClient,
-		cfg:    cfg,
-		apikey: cfg.APIKey,
-	}
+		cfg:    f.cfg,
+		apikey: f.cfg.APIKey,
+	}, nil
 }
 
-func (c *APIClient) Endpoint() string {
+func loadGUIConfig() (config.GUIConfiguration, error) {
+	// Load the certs and get the ID
+	cert, err := tls.LoadX509KeyPair(
+		locations.Get(locations.CertFile),
+		locations.Get(locations.KeyFile),
+	)
+	if err != nil {
+		return config.GUIConfiguration{}, fmt.Errorf("reading device ID: %w", err)
+	}
+
+	myID := protocol.NewDeviceID(cert.Certificate[0])
+
+	// Load the config
+	cfg, _, err := config.Load(locations.Get(locations.ConfigFile), myID, events.NoopLogger)
+	if err != nil {
+		return config.GUIConfiguration{}, fmt.Errorf("loading config: %w", err)
+	}
+
+	guiCfg := cfg.GUI()
+
+	if guiCfg.Address() == "" {
+		return config.GUIConfiguration{}, errors.New("Could not find GUI Address")
+	}
+
+	if guiCfg.APIKey == "" {
+		return config.GUIConfiguration{}, errors.New("Could not find GUI API key")
+	}
+
+	return guiCfg, nil
+}
+
+func (c *apiClient) Endpoint() string {
 	if c.cfg.Network() == "unix" {
 		return "http://unix/"
 	}
@@ -54,7 +112,7 @@ func (c *APIClient) Endpoint() string {
 	return url
 }
 
-func (c *APIClient) Do(req *http.Request) (*http.Response, error) {
+func (c *apiClient) Do(req *http.Request) (*http.Response, error) {
 	req.Header.Set("X-API-Key", c.apikey)
 	resp, err := c.Client.Do(req)
 	if err != nil {
@@ -63,28 +121,46 @@ func (c *APIClient) Do(req *http.Request) (*http.Response, error) {
 	return resp, checkResponse(resp)
 }
 
-func (c *APIClient) Get(url string) (*http.Response, error) {
-	request, err := http.NewRequest("GET", c.Endpoint()+"rest/"+url, nil)
+func (c *apiClient) Request(url, method string, r io.Reader) (*http.Response, error) {
+	request, err := http.NewRequest(method, c.Endpoint()+"rest/"+url, r)
 	if err != nil {
 		return nil, err
 	}
 	return c.Do(request)
 }
 
-func (c *APIClient) Post(url, body string) (*http.Response, error) {
-	request, err := http.NewRequest("POST", c.Endpoint()+"rest/"+url, bytes.NewBufferString(body))
+func (c *apiClient) RequestString(url, method, data string) (*http.Response, error) {
+	return c.Request(url, method, bytes.NewBufferString(data))
+}
+
+func (c *apiClient) RequestJSON(url, method string, o interface{}) (*http.Response, error) {
+	data, err := json.Marshal(o)
 	if err != nil {
 		return nil, err
 	}
-	return c.Do(request)
+	return c.Request(url, method, bytes.NewBuffer(data))
 }
 
+func (c *apiClient) Get(url string) (*http.Response, error) {
+	return c.RequestString(url, "GET", "")
+}
+
+func (c *apiClient) Post(url, body string) (*http.Response, error) {
+	return c.RequestString(url, "POST", body)
+}
+
+func (c *apiClient) PutJSON(url string, o interface{}) (*http.Response, error) {
+	return c.RequestJSON(url, "PUT", o)
+}
+
+var errNotFound = errors.New("invalid endpoint or API call")
+
 func checkResponse(response *http.Response) error {
-	if response.StatusCode == 404 {
-		return errors.New("invalid endpoint or API call")
-	} else if response.StatusCode == 403 {
+	if response.StatusCode == http.StatusNotFound {
+		return errNotFound
+	} else if response.StatusCode == http.StatusUnauthorized {
 		return errors.New("invalid API key")
-	} else if response.StatusCode != 200 {
+	} else if response.StatusCode != http.StatusOK {
 		data, err := responseToBArray(response)
 		if err != nil {
 			return err

cmd/syncthing/cli/config.go

@@ -0,0 +1,87 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"reflect"
+
+	"github.com/AudriusButkevicius/recli"
+	"github.com/syncthing/syncthing/lib/config"
+	"github.com/urfave/cli"
+)
+
+type configHandler struct {
+	original, cfg config.Configuration
+	client        APIClient
+	err           error
+}
+
+func getConfigCommand(f *apiClientFactory) (cli.Command, error) {
+	h := new(configHandler)
+	h.client, h.err = f.getClient()
+	if h.err == nil {
+		h.cfg, h.err = getConfig(h.client)
+	}
+	h.original = h.cfg.Copy()
+
+	// Copy the config and set the default flags
+	recliCfg := recli.DefaultConfig
+	recliCfg.IDTag.Name = "xml"
+	recliCfg.SkipTag.Name = "json"
+
+	commands, err := recli.New(recliCfg).Construct(&h.cfg)
+	if err != nil {
+		return cli.Command{}, fmt.Errorf("config reflect: %w", err)
+	}
+
+	return cli.Command{
+		Name:        "config",
+		HideHelp:    true,
+		Usage:       "Configuration modification command group",
+		Subcommands: commands,
+		Before:      h.configBefore,
+		After:       h.configAfter,
+	}, nil
+}
+
+func (h *configHandler) configBefore(c *cli.Context) error {
+	for _, arg := range c.Args() {
+		if arg == "--help" || arg == "-h" {
+			return nil
+		}
+	}
+	return h.err
+}
+
+func (h *configHandler) configAfter(_ *cli.Context) error {
+	if h.err != nil {
+		// Error was already returned in configBefore
+		return nil
+	}
+	if reflect.DeepEqual(h.cfg, h.original) {
+		return nil
+	}
+	body, err := json.MarshalIndent(h.cfg, "", "  ")
+	if err != nil {
+		return err
+	}
+	resp, err := h.client.Post("system/config", string(body))
+	if err != nil {
+		return err
+	}
+	if resp.StatusCode != 200 {
+		body, err := responseToBArray(resp)
+		if err != nil {
+			return err
+		}
+		return errors.New(string(body))
+	}
+	return nil
+}

cmd/syncthing/cli/debug.go

@@ -0,0 +1,55 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"fmt"
+	"net/url"
+
+	"github.com/urfave/cli"
+)
+
+var debugCommand = cli.Command{
+	Name:     "debug",
+	HideHelp: true,
+	Usage:    "Debug command group",
+	Subcommands: []cli.Command{
+		{
+			Name:      "file",
+			Usage:     "Show information about a file (or directory/symlink)",
+			ArgsUsage: "FOLDER-ID PATH",
+			Action:    expects(2, debugFile()),
+		},
+		indexCommand,
+		{
+			Name:      "profile",
+			Usage:     "Save a profile to help figuring out what Syncthing does.",
+			ArgsUsage: "cpu | heap",
+			Action:    expects(1, profile()),
+		},
+	},
+}
+
+func debugFile() cli.ActionFunc {
+	return func(c *cli.Context) error {
+		query := make(url.Values)
+		query.Set("folder", c.Args()[0])
+		query.Set("file", normalizePath(c.Args()[1]))
+		return indexDumpOutput("debug/file?" + query.Encode())(c)
+	}
+}
+
+func profile() cli.ActionFunc {
+	return func(c *cli.Context) error {
+		switch t := c.Args()[0]; t {
+		case "cpu", "heap":
+			return saveToFile(fmt.Sprintf("debug/%vprof", c.Args()[0]))(c)
+		default:
+			return fmt.Errorf("expected cpu or heap as argument, got %v", t)
+		}
+	}
+}

cmd/syncthing/cli/errors.go

@@ -22,12 +22,12 @@ var errorsCommand = cli.Command{
 		{
 			Name:   "show",
 			Usage:  "Show pending errors",
-			Action: expects(0, dumpOutput("system/error")),
+			Action: expects(0, indexDumpOutput("system/error")),
 		},
 		{
 			Name:      "push",
 			Usage:     "Push an error to active clients",
-			ArgsUsage: "[error message]",
+			ArgsUsage: "ERROR-MESSAGE",
 			Action:    expects(1, errorsPush),
 		},
 		{
@@ -39,7 +39,7 @@ var errorsCommand = cli.Command{
 }
 
 func errorsPush(c *cli.Context) error {
-	client := c.App.Metadata["client"].(*APIClient)
+	client := c.App.Metadata["client"].(APIClient)
 	errStr := strings.Join(c.Args(), " ")
 	response, err := client.Post("system/error", strings.TrimSpace(errStr))
 	if err != nil {

cmd/syncthing/cli/index.go

@@ -0,0 +1,38 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"github.com/urfave/cli"
+)
+
+var indexCommand = cli.Command{
+	Name:  "index",
+	Usage: "Show information about the index (database)",
+	Subcommands: []cli.Command{
+		{
+			Name:   "dump",
+			Usage:  "Print the entire db",
+			Action: expects(0, indexDump),
+		},
+		{
+			Name:   "dump-size",
+			Usage:  "Print the db size of different categories of information",
+			Action: expects(0, indexDumpSize),
+		},
+		{
+			Name:   "check",
+			Usage:  "Check the database for inconsistencies",
+			Action: expects(0, indexCheck),
+		},
+		{
+			Name:   "account",
+			Usage:  "Print key and value size statistics per key type",
+			Action: expects(0, indexAccount),
+		},
+	},
+}

cmd/syncthing/cli/index_accounting.go

@@ -4,22 +4,26 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
-package main
+package cli
 
 import (
 	"fmt"
-	"log"
 	"os"
 	"text/tabwriter"
 
-	"github.com/syncthing/syncthing/lib/db/backend"
+	"github.com/urfave/cli"
 )
 
-// account prints key and data size statistics per class
-func account(ldb backend.Backend) {
+// indexAccount prints key and data size statistics per class
+func indexAccount(*cli.Context) error {
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
+
 	it, err := ldb.NewPrefixIterator(nil)
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}
 
 	var ksizes [256]int
@@ -55,4 +59,6 @@ func account(ldb backend.Backend) {
 	}
 	fmt.Fprintf(tw, "Total\t%d items,\t%d KB keys +\t%d KB data.\t\n", toti, totks/1000, totds/1000)
 	tw.Flush()
+
+	return nil
 }

cmd/syncthing/cli/index_dump.go

@@ -4,23 +4,27 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
-package main
+package cli
 
 import (
 	"encoding/binary"
 	"fmt"
-	"log"
 	"time"
 
+	"github.com/urfave/cli"
+
 	"github.com/syncthing/syncthing/lib/db"
-	"github.com/syncthing/syncthing/lib/db/backend"
 	"github.com/syncthing/syncthing/lib/protocol"
 )
 
-func dump(ldb backend.Backend) {
+func indexDump(*cli.Context) error {
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
 	it, err := ldb.NewPrefixIterator(nil)
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}
 	for it.Next() {
 		key := it.Key()
@@ -34,7 +38,7 @@ func dump(ldb backend.Backend) {
 			var f protocol.FileInfo
 			err := f.Unmarshal(it.Value())
 			if err != nil {
-				log.Fatal(err)
+				return err
 			}
 			fmt.Printf(" V:%v\n", f)
 
@@ -61,10 +65,10 @@ func dump(ldb backend.Backend) {
 			folder := binary.BigEndian.Uint32(key[1:])
 			name := nulString(key[1+4:])
 			val := it.Value()
-			var real, virt time.Time
-			real.UnmarshalBinary(val[:len(val)/2])
-			virt.UnmarshalBinary(val[len(val)/2:])
-			fmt.Printf("[mtime] F:%d N:%q R:%v V:%v\n", folder, name, real, virt)
+			var realTime, virtualTime time.Time
+			realTime.UnmarshalBinary(val[:len(val)/2])
+			virtualTime.UnmarshalBinary(val[len(val)/2:])
+			fmt.Printf("[mtime] F:%d N:%q R:%v V:%v\n", folder, name, realTime, virtualTime)
 
 		case db.KeyTypeFolderIdx:
 			key := binary.BigEndian.Uint32(key[1:])
@@ -152,4 +156,5 @@ func dump(ldb backend.Backend) {
 			fmt.Printf("[??? %d]\n  %x\n  %x\n", key[0], key, it.Value())
 		}
 	}
+	return nil
 }

cmd/syncthing/cli/index_dumpsize.go

@@ -4,51 +4,38 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
-package main
+package cli
 
 import (
-	"container/heap"
 	"encoding/binary"
 	"fmt"
-	"log"
+	"sort"
+
+	"github.com/urfave/cli"
 
 	"github.com/syncthing/syncthing/lib/db"
-	"github.com/syncthing/syncthing/lib/db/backend"
 )
 
-type SizedElement struct {
-	key  string
-	size int
-}
+func indexDumpSize(*cli.Context) error {
+	type sizedElement struct {
+		key  string
+		size int
+	}
 
-type ElementHeap []SizedElement
-
-func (h ElementHeap) Len() int           { return len(h) }
-func (h ElementHeap) Less(i, j int) bool { return h[i].size > h[j].size }
-func (h ElementHeap) Swap(i, j int)      { h[i], h[j] = h[j], h[i] }
-
-func (h *ElementHeap) Push(x interface{}) {
-	*h = append(*h, x.(SizedElement))
-}
-
-func (h *ElementHeap) Pop() interface{} {
-	old := *h
-	n := len(old)
-	x := old[n-1]
-	*h = old[0 : n-1]
-	return x
-}
-
-func dumpsize(ldb backend.Backend) {
-	h := &ElementHeap{}
-	heap.Init(h)
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
 
 	it, err := ldb.NewPrefixIterator(nil)
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}
-	var ele SizedElement
+
+	var elems []sizedElement
 	for it.Next() {
+		var ele sizedElement
+
 		key := it.Key()
 		switch key[0] {
 		case db.KeyTypeDevice:
@@ -89,11 +76,15 @@ func dumpsize(ldb backend.Backend) {
 			ele.key = fmt.Sprintf("UNKNOWN:%x", key)
 		}
 		ele.size = len(it.Value())
-		heap.Push(h, ele)
+		elems = append(elems, ele)
 	}
 
-	for h.Len() > 0 {
-		ele = heap.Pop(h).(SizedElement)
+	sort.Slice(elems, func(i, j int) bool {
+		return elems[i].size > elems[j].size
+	})
+	for _, ele := range elems {
 		fmt.Println(ele.key, ele.size)
 	}
+
+	return nil
 }

cmd/syncthing/cli/index_idxck.go

@@ -4,17 +4,18 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
-package main
+package cli
 
 import (
 	"bytes"
 	"encoding/binary"
+	"errors"
 	"fmt"
-	"log"
 	"sort"
 
+	"github.com/urfave/cli"
+
 	"github.com/syncthing/syncthing/lib/db"
-	"github.com/syncthing/syncthing/lib/db/backend"
 	"github.com/syncthing/syncthing/lib/protocol"
 )
 
@@ -34,7 +35,12 @@ type sequenceKey struct {
 	sequence uint64
 }
 
-func idxck(ldb backend.Backend) (success bool) {
+func indexCheck(*cli.Context) (err error) {
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
+
 	folders := make(map[uint32]string)
 	devices := make(map[uint32]string)
 	deviceToIDs := make(map[string]uint32)
@@ -47,11 +53,20 @@ func idxck(ldb backend.Backend) (success bool) {
 	usedBlocklists := make(map[string]struct{})
 	usedVersions := make(map[string]struct{})
 	var localDeviceKey uint32
-	success = true
+	success := true
+	defer func() {
+		if err == nil {
+			if success {
+				fmt.Println("Index check completed successfully.")
+			} else {
+				err = errors.New("Inconsistencies found in the index")
+			}
+		}
+	}()
 
 	it, err := ldb.NewPrefixIterator(nil)
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}
 	for it.Next() {
 		key := it.Key()
@@ -329,12 +344,12 @@ func idxck(ldb backend.Backend) (success bool) {
 		fmt.Printf("%d version entries out of %d needs GC\n", d, len(versions))
 	}
 
-	return
+	return nil
 }
 
 func needsLocally(vl db.VersionList) bool {
 	gfv, gok := vl.GetGlobal()
-	if !gok { // That's weird, but we hardly need something non-existant
+	if !gok { // That's weird, but we hardly need something non-existent
 		return false
 	}
 	fv, ok := vl.Get(protocol.LocalDeviceID[:])

cmd/syncthing/cli/main.go

@@ -8,30 +8,26 @@ package cli
 
 import (
 	"bufio"
-	"crypto/tls"
-	"encoding/json"
-	"io/ioutil"
+	"errors"
+	"fmt"
+	"io"
 	"os"
-	"reflect"
 	"strings"
 
-	"github.com/AudriusButkevicius/recli"
 	"github.com/alecthomas/kong"
 	"github.com/flynn-archive/go-shlex"
-	"github.com/mattn/go-isatty"
-	"github.com/pkg/errors"
-	"github.com/syncthing/syncthing/lib/config"
-	"github.com/syncthing/syncthing/lib/events"
-	"github.com/syncthing/syncthing/lib/locations"
-	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/urfave/cli"
+
+	"github.com/syncthing/syncthing/cmd/syncthing/cmdutil"
+	"github.com/syncthing/syncthing/lib/config"
 )
 
 type preCli struct {
 	GUIAddress string `name:"gui-address"`
 	GUIAPIKey  string `name:"gui-apikey"`
 	HomeDir    string `name:"home"`
-	ConfDir    string `name:"conf"`
+	ConfDir    string `name:"config"`
+	DataDir    string `name:"data"`
 }
 
 func Run() error {
@@ -42,76 +38,31 @@ func Run() error {
 	// add flags there...
 	c := preCli{}
 	parseFlags(&c)
+	return runInternal(c, os.Args)
+}
 
+func RunWithArgs(cliArgs []string) error {
+	c := preCli{}
+	parseFlagsWithArgs(cliArgs, &c)
+	return runInternal(c, cliArgs)
+}
+
+func runInternal(c preCli, cliArgs []string) error {
 	// Not set as default above because the strings can be really long.
-	var err error
-	homeSet := c.HomeDir != ""
-	confSet := c.ConfDir != ""
-	switch {
-	case homeSet && confSet:
-		err = errors.New("-home must not be used together with -conf")
-	case homeSet:
-		err = locations.SetBaseDir(locations.ConfigBaseDir, c.HomeDir)
-	case confSet:
-		err = locations.SetBaseDir(locations.ConfigBaseDir, c.ConfDir)
-	}
+	err := cmdutil.SetConfigDataLocationsFromFlags(c.HomeDir, c.ConfDir, c.DataDir)
 	if err != nil {
-		return errors.Wrap(err, "Command line options:")
+		return fmt.Errorf("Command line options: %w", err)
 	}
-	guiCfg := config.GUIConfiguration{
-		RawAddress: c.GUIAddress,
-		APIKey:     c.GUIAPIKey,
+	clientFactory := &apiClientFactory{
+		cfg: config.GUIConfiguration{
+			RawAddress: c.GUIAddress,
+			APIKey:     c.GUIAPIKey,
+		},
 	}
 
-	// Now if the API key and address is not provided (we are not connecting to a remote instance),
-	// try to rip it out of the config.
-	if guiCfg.RawAddress == "" && guiCfg.APIKey == "" {
-		// Load the certs and get the ID
-		cert, err := tls.LoadX509KeyPair(
-			locations.Get(locations.CertFile),
-			locations.Get(locations.KeyFile),
-		)
-		if err != nil {
-			return errors.Wrap(err, "reading device ID")
-		}
-
-		myID := protocol.NewDeviceID(cert.Certificate[0])
-
-		// Load the config
-		cfg, _, err := config.Load(locations.Get(locations.ConfigFile), myID, events.NoopLogger)
-		if err != nil {
-			return errors.Wrap(err, "loading config")
-		}
-
-		guiCfg = cfg.GUI()
-	} else if guiCfg.Address() == "" || guiCfg.APIKey == "" {
-		return errors.New("Both --gui-address and --gui-apikey should be specified")
-	}
-
-	if guiCfg.Address() == "" {
-		return errors.New("Could not find GUI Address")
-	}
-
-	if guiCfg.APIKey == "" {
-		return errors.New("Could not find GUI API key")
-	}
-
-	client := getClient(guiCfg)
-
-	cfg, err := getConfig(client)
-	original := cfg.Copy()
+	configCommand, err := getConfigCommand(clientFactory)
 	if err != nil {
-		return errors.Wrap(err, "getting config")
-	}
-
-	// Copy the config and set the default flags
-	recliCfg := recli.DefaultConfig
-	recliCfg.IDTag.Name = "xml"
-	recliCfg.SkipTag.Name = "json"
-
-	commands, err := recli.New(recliCfg).Construct(&cfg)
-	if err != nil {
-		return errors.Wrap(err, "config reflect")
+		return err
 	}
 
 	// Implement the same flags at the upper CLI, but do nothing with them.
@@ -119,23 +70,23 @@ func Run() error {
 	fakeFlags := []cli.Flag{
 		cli.StringFlag{
 			Name:  "gui-address",
-			Value: "URL",
-			Usage: "Override GUI address (e.g. \"http://192.0.2.42:8443\")",
+			Usage: "Override GUI address to `URL` (e.g. \"192.0.2.42:8443\")",
 		},
 		cli.StringFlag{
 			Name:  "gui-apikey",
-			Value: "API-KEY",
-			Usage: "Override GUI API key",
+			Usage: "Override GUI API key to `API-KEY`",
 		},
 		cli.StringFlag{
 			Name:  "home",
-			Value: "PATH",
-			Usage: "Set configuration and data directory",
+			Usage: "Set configuration and data directory to `PATH`",
 		},
 		cli.StringFlag{
-			Name:  "conf",
-			Value: "PATH",
-			Usage: "Set configuration directory (config and keys)",
+			Name:  "config",
+			Usage: "Set configuration directory (config and keys) to `PATH`",
+		},
+		cli.StringFlag{
+			Name:  "data",
+			Usage: "Set data directory (database and logs) to `PATH`",
 		},
 	}
 
@@ -143,71 +94,53 @@ func Run() error {
 	app := cli.NewApp()
 	app.Author = "The Syncthing Authors"
 	app.Metadata = map[string]interface{}{
-		"client": client,
+		"clientFactory": clientFactory,
 	}
 	app.Commands = []cli.Command{{
 		Name:  "cli",
 		Usage: "Syncthing command line interface",
 		Flags: fakeFlags,
 		Subcommands: []cli.Command{
-			{
-				Name:        "config",
-				HideHelp:    true,
-				Usage:       "Configuration modification command group",
-				Subcommands: commands,
-			},
+			configCommand,
 			showCommand,
 			operationCommand,
 			errorsCommand,
+			debugCommand,
+			{
+				Name:     "-",
+				HideHelp: true,
+				Usage:    "Read commands from stdin",
+				Action: func(ctx *cli.Context) error {
+					if ctx.NArg() > 0 {
+						return errors.New("command does not expect any arguments")
+					}
+
+					// Drop the `-` not to recurse into self.
+					args := make([]string, len(cliArgs)-1)
+					copy(args, cliArgs)
+
+					fmt.Println("Reading commands from stdin...", args)
+					scanner := bufio.NewScanner(os.Stdin)
+					for scanner.Scan() {
+						input, err := shlex.Split(scanner.Text())
+						if err != nil {
+							return fmt.Errorf("parsing input: %w", err)
+						}
+						if len(input) == 0 {
+							continue
+						}
+						err = app.Run(append(args, input...))
+						if err != nil {
+							return err
+						}
+					}
+					return scanner.Err()
+				},
+			},
 		},
 	}}
 
-	tty := isatty.IsTerminal(os.Stdin.Fd()) || isatty.IsCygwinTerminal(os.Stdin.Fd())
-	if !tty {
-		// Not a TTY, consume from stdin
-		scanner := bufio.NewScanner(os.Stdin)
-		for scanner.Scan() {
-			input, err := shlex.Split(scanner.Text())
-			if err != nil {
-				return errors.Wrap(err, "parsing input")
-			}
-			if len(input) == 0 {
-				continue
-			}
-			err = app.Run(append(os.Args, input...))
-			if err != nil {
-				return err
-			}
-		}
-		err = scanner.Err()
-		if err != nil {
-			return err
-		}
-	} else {
-		err = app.Run(os.Args)
-		if err != nil {
-			return err
-		}
-	}
-
-	if !reflect.DeepEqual(cfg, original) {
-		body, err := json.MarshalIndent(cfg, "", "  ")
-		if err != nil {
-			return err
-		}
-		resp, err := client.Post("system/config", string(body))
-		if err != nil {
-			return err
-		}
-		if resp.StatusCode != 200 {
-			body, err := responseToBArray(resp)
-			if err != nil {
-				return err
-			}
-			return errors.New(string(body))
-		}
-	}
-	return nil
+	return app.Run(cliArgs)
 }
 
 func parseFlags(c *preCli) error {
@@ -216,7 +149,10 @@ func parseFlags(c *preCli) error {
 	if len(os.Args) <= 2 {
 		return nil
 	}
-	args := os.Args[2:]
+	return parseFlagsWithArgs(os.Args[2:], c)
+}
+
+func parseFlagsWithArgs(args []string, c *preCli) error {
 	for i := 0; i < len(args); i++ {
 		if !strings.HasPrefix(args[i], "--") {
 			args = args[:i]
@@ -227,7 +163,7 @@ func parseFlags(c *preCli) error {
 		}
 	}
 	// We don't want kong to print anything nor os.Exit (e.g. on -h)
-	parser, err := kong.New(c, kong.Writers(ioutil.Discard, ioutil.Discard), kong.Exit(func(int) {}))
+	parser, err := kong.New(c, kong.Writers(io.Discard, io.Discard), kong.Exit(func(int) {}))
 	if err != nil {
 		return err
 	}

cmd/syncthing/cli/operations.go

@@ -7,8 +7,13 @@
 package cli
 
 import (
+	"bufio"
+	"errors"
 	"fmt"
+	"path/filepath"
 
+	"github.com/syncthing/syncthing/lib/config"
+	"github.com/syncthing/syncthing/lib/fs"
 	"github.com/urfave/cli"
 )
 
@@ -35,14 +40,23 @@ var operationCommand = cli.Command{
 		{
 			Name:      "folder-override",
 			Usage:     "Override changes on folder (remote for sendonly, local for receiveonly). WARNING: Destructive - deletes/changes your data.",
-			ArgsUsage: "[folder id]",
+			ArgsUsage: "FOLDER-ID",
 			Action:    expects(1, foldersOverride),
 		},
+		{
+			Name:      "default-ignores",
+			Usage:     "Set the default ignores (config) from a file",
+			ArgsUsage: "PATH",
+			Action:    expects(1, setDefaultIgnores),
+		},
 	},
 }
 
 func foldersOverride(c *cli.Context) error {
-	client := c.App.Metadata["client"].(*APIClient)
+	client, err := getClientFactory(c).getClient()
+	if err != nil {
+		return err
+	}
 	cfg, err := getConfig(client)
 	if err != nil {
 		return err
@@ -64,10 +78,36 @@ func foldersOverride(c *cli.Context) error {
 				if body != "" {
 					errStr += "\nBody: " + body
 				}
-				return fmt.Errorf(errStr)
+				return errors.New(errStr)
 			}
 			return nil
 		}
 	}
-	return fmt.Errorf("Folder " + rid + " not found")
+	return fmt.Errorf("Folder %q not found", rid)
+}
+
+func setDefaultIgnores(c *cli.Context) error {
+	client, err := getClientFactory(c).getClient()
+	if err != nil {
+		return err
+	}
+	dir, file := filepath.Split(c.Args()[0])
+	filesystem := fs.NewFilesystem(fs.FilesystemTypeBasic, dir)
+
+	fd, err := filesystem.Open(file)
+	if err != nil {
+		return err
+	}
+	scanner := bufio.NewScanner(fd)
+	var lines []string
+	for scanner.Scan() {
+		lines = append(lines, scanner.Text())
+	}
+	fd.Close()
+	if err := scanner.Err(); err != nil {
+		return err
+	}
+
+	_, err = client.PutJSON("config/defaults/ignores", config.Ignores{Lines: lines})
+	return err
 }

cmd/syncthing/cli/pending.go

@@ -0,0 +1,45 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"net/url"
+
+	"github.com/urfave/cli"
+)
+
+var pendingCommand = cli.Command{
+	Name:     "pending",
+	HideHelp: true,
+	Usage:    "Pending subcommand group",
+	Subcommands: []cli.Command{
+		{
+			Name:   "devices",
+			Usage:  "Show pending devices",
+			Action: expects(0, indexDumpOutput("cluster/pending/devices")),
+		},
+		{
+			Name:  "folders",
+			Usage: "Show pending folders",
+			Flags: []cli.Flag{
+				cli.StringFlag{Name: "device", Usage: "Show pending folders offered by given device"},
+			},
+			Action: expects(0, folders()),
+		},
+	},
+}
+
+func folders() cli.ActionFunc {
+	return func(c *cli.Context) error {
+		if c.String("device") != "" {
+			query := make(url.Values)
+			query.Set("device", c.String("device"))
+			return indexDumpOutput("cluster/pending/folders?" + query.Encode())(c)
+		}
+		return indexDumpOutput("cluster/pending/folders")(c)
+	}
+}

cmd/syncthing/cli/show.go

@@ -18,27 +18,33 @@ var showCommand = cli.Command{
 		{
 			Name:   "version",
 			Usage:  "Show syncthing client version",
-			Action: expects(0, dumpOutput("system/version")),
+			Action: expects(0, indexDumpOutput("system/version")),
 		},
 		{
 			Name:   "config-status",
 			Usage:  "Show configuration status, whether or not a restart is required for changes to take effect",
-			Action: expects(0, dumpOutput("config/restart-required")),
+			Action: expects(0, indexDumpOutput("config/restart-required")),
 		},
 		{
 			Name:   "system",
 			Usage:  "Show system status",
-			Action: expects(0, dumpOutput("system/status")),
+			Action: expects(0, indexDumpOutput("system/status")),
 		},
 		{
 			Name:   "connections",
 			Usage:  "Report about connections to other devices",
-			Action: expects(0, dumpOutput("system/connections")),
+			Action: expects(0, indexDumpOutput("system/connections")),
 		},
+		{
+			Name:   "discovery",
+			Usage:  "Show the discovered addresses of remote devices (from cache of the running syncthing instance)",
+			Action: expects(0, indexDumpOutput("system/discovery")),
+		},
+		pendingCommand,
 		{
 			Name:   "usage",
 			Usage:  "Show usage report",
-			Action: expects(0, dumpOutput("svc/report")),
+			Action: expects(0, indexDumpOutput("svc/report")),
 		},
 	},
 }

cmd/syncthing/cli/utils.go

@@ -8,17 +8,22 @@ package cli
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
+	"mime"
 	"net/http"
 	"os"
+	"path/filepath"
 
 	"github.com/syncthing/syncthing/lib/config"
+	"github.com/syncthing/syncthing/lib/db/backend"
+	"github.com/syncthing/syncthing/lib/locations"
 	"github.com/urfave/cli"
 )
 
 func responseToBArray(response *http.Response) ([]byte, error) {
-	bytes, err := ioutil.ReadAll(response.Body)
+	bytes, err := io.ReadAll(response.Body)
 	if err != nil {
 		return nil, err
 	}
@@ -27,24 +32,69 @@ func responseToBArray(response *http.Response) ([]byte, error) {
 
 func emptyPost(url string) cli.ActionFunc {
 	return func(c *cli.Context) error {
-		client := c.App.Metadata["client"].(*APIClient)
-		_, err := client.Post(url, "")
+		client, err := getClientFactory(c).getClient()
+		if err != nil {
+			return err
+		}
+		_, err = client.Post(url, "")
 		return err
 	}
 }
 
-func dumpOutput(url string) cli.ActionFunc {
+func indexDumpOutput(url string) cli.ActionFunc {
 	return func(c *cli.Context) error {
-		client := c.App.Metadata["client"].(*APIClient)
+		client, err := getClientFactory(c).getClient()
+		if err != nil {
+			return err
+		}
+		response, err := client.Get(url)
+		if errors.Is(err, errNotFound) {
+			return errors.New("not found (folder/file not in database)")
+		}
+		if err != nil {
+			return err
+		}
+		return prettyPrintResponse(response)
+	}
+}
+
+func saveToFile(url string) cli.ActionFunc {
+	return func(c *cli.Context) error {
+		client, err := getClientFactory(c).getClient()
+		if err != nil {
+			return err
+		}
 		response, err := client.Get(url)
 		if err != nil {
 			return err
 		}
-		return prettyPrintResponse(c, response)
+		_, params, err := mime.ParseMediaType(response.Header.Get("Content-Disposition"))
+		if err != nil {
+			return err
+		}
+		filename := params["filename"]
+		if filename == "" {
+			return errors.New("Missing filename in response")
+		}
+		bs, err := responseToBArray(response)
+		if err != nil {
+			return err
+		}
+		f, err := os.Create(filename)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+		_, err = f.Write(bs)
+		if err != nil {
+			return err
+		}
+		fmt.Println("Wrote results to", filename)
+		return err
 	}
 }
 
-func getConfig(c *APIClient) (config.Configuration, error) {
+func getConfig(c APIClient) (config.Configuration, error) {
 	cfg := config.Configuration{}
 	response, err := c.Get("system/config")
 	if err != nil {
@@ -55,8 +105,8 @@ func getConfig(c *APIClient) (config.Configuration, error) {
 		return cfg, err
 	}
 	err = json.Unmarshal(bytes, &cfg)
-	if err == nil {
-		return cfg, err
+	if err != nil {
+		return config.Configuration{}, err
 	}
 	return cfg, nil
 }
@@ -80,7 +130,7 @@ func prettyPrintJSON(data interface{}) error {
 	return enc.Encode(data)
 }
 
-func prettyPrintResponse(c *cli.Context, response *http.Response) error {
+func prettyPrintResponse(response *http.Response) error {
 	bytes, err := responseToBArray(response)
 	if err != nil {
 		return err
@@ -92,3 +142,24 @@ func prettyPrintResponse(c *cli.Context, response *http.Response) error {
 	// TODO: Check flag for pretty print format
 	return prettyPrintJSON(data)
 }
+
+func getDB() (backend.Backend, error) {
+	return backend.OpenLevelDBRO(locations.Get(locations.Database))
+}
+
+func nulString(bs []byte) string {
+	for i := range bs {
+		if bs[i] == 0 {
+			return string(bs[:i])
+		}
+	}
+	return string(bs)
+}
+
+func normalizePath(path string) string {
+	return filepath.ToSlash(filepath.Clean(path))
+}
+
+func getClientFactory(c *cli.Context) *apiClientFactory {
+	return c.App.Metadata["clientFactory"].(*apiClientFactory)
+}

cmd/syncthing/cmdutil/options_common.go

@@ -0,0 +1,16 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cmdutil
+
+// CommonOptions are reused among several subcommands
+type CommonOptions struct {
+	buildCommonOptions
+	ConfDir         string `name:"config" placeholder:"PATH" help:"Set configuration directory (config and keys)"`
+	HomeDir         string `name:"home" placeholder:"PATH" help:"Set configuration and data directory"`
+	NoDefaultFolder bool   `env:"STNODEFAULTFOLDER" help:"Don't create the \"default\" folder on first startup"`
+	SkipPortProbing bool   `help:"Don't try to find free ports for GUI and listen addresses on first startup"`
+}

cmd/syncthing/cmdutil/options_others.go

@@ -4,10 +4,11 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
+//go:build !windows
 // +build !windows
 
-package main
+package cmdutil
 
-type buildServeOptions struct {
+type buildCommonOptions struct {
 	HideConsole bool `hidden:""`
 }

cmd/syncthing/cmdutil/options_windows.go

@@ -4,8 +4,8 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
-package main
+package cmdutil
 
-type buildServeOptions struct {
+type buildCommonOptions struct {
 	HideConsole bool `name:"no-console" help:"Hide console window"`
 }

cmd/syncthing/cmdutil/util.go

@@ -0,0 +1,35 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cmdutil
+
+import (
+	"errors"
+
+	"github.com/syncthing/syncthing/lib/locations"
+)
+
+func SetConfigDataLocationsFromFlags(homeDir, confDir, dataDir string) error {
+	homeSet := homeDir != ""
+	confSet := confDir != ""
+	dataSet := dataDir != ""
+	switch {
+	case dataSet != confSet:
+		return errors.New("either both or none of --config and --data must be given, use --home to set both at once")
+	case homeSet && dataSet:
+		return errors.New("--home must not be used together with --config and --data")
+	case homeSet:
+		confDir = homeDir
+		dataDir = homeDir
+		fallthrough
+	case dataSet:
+		if err := locations.SetBaseDir(locations.ConfigBaseDir, confDir); err != nil {
+			return err
+		}
+		return locations.SetBaseDir(locations.DataBaseDir, dataDir)
+	}
+	return nil
+}

cmd/syncthing/crash_reporting.go

@@ -10,7 +10,6 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -62,7 +61,7 @@ func uploadPanicLogs(ctx context.Context, urlBase, dir string) {
 // the log contents. A HEAD request is made to see if the log has already
 // been reported. If not, a PUT is made with the log contents.
 func uploadPanicLog(ctx context.Context, urlBase, file string) error {
-	data, err := ioutil.ReadFile(file)
+	data, err := os.ReadFile(file)
 	if err != nil {
 		return err
 	}

cmd/syncthing/decrypt/decrypt.go

@@ -10,10 +10,11 @@ package decrypt
 import (
 	"encoding/binary"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
+	"os"
 	"path/filepath"
 
 	"github.com/syncthing/syncthing/lib/config"
@@ -34,6 +35,7 @@ type CLI struct {
 	TokenPath  string `placeholder:"PATH" help:"Path to the token file within the folder (used to determine folder ID)"`
 
 	folderKey *[32]byte
+	keyGen    *protocol.KeyGenerator
 }
 
 type storedEncryptionToken struct {
@@ -45,7 +47,7 @@ func (c *CLI) Run() error {
 	log.SetFlags(0)
 
 	if c.To == "" && !c.VerifyOnly {
-		return fmt.Errorf("must set --to or --verify")
+		return errors.New("must set --to or --verify-only")
 	}
 
 	if c.TokenPath == "" {
@@ -67,7 +69,8 @@ func (c *CLI) Run() error {
 		}
 	}
 
-	c.folderKey = protocol.KeyFromPassword(c.FolderID, c.Password)
+	c.keyGen = protocol.NewKeyGenerator()
+	c.folderKey = c.keyGen.KeyFromPassword(c.FolderID, c.Password)
 
 	return c.walk()
 }
@@ -112,7 +115,7 @@ func (c *CLI) withContinue(err error) error {
 // error.
 func (c *CLI) getFolderID() (string, error) {
 	tokenPath := filepath.Join(c.Path, c.TokenPath)
-	bs, err := ioutil.ReadFile(tokenPath)
+	bs, err := os.ReadFile(tokenPath)
 	if err != nil {
 		return "", fmt.Errorf("reading folder token: %w", err)
 	}
@@ -128,6 +131,9 @@ func (c *CLI) getFolderID() (string, error) {
 // process handles the file named path in srcFs, decrypting it into dstFs
 // unless dstFs is nil.
 func (c *CLI) process(srcFs fs.Filesystem, dstFs fs.Filesystem, path string) error {
+	// Which filemode bits to preserve
+	const retainBits = fs.ModePerm | fs.ModeSetgid | fs.ModeSetuid | fs.ModeSticky
+
 	if c.Verbose {
 		log.Printf("Processing %q", path)
 	}
@@ -138,7 +144,7 @@ func (c *CLI) process(srcFs fs.Filesystem, dstFs fs.Filesystem, path string) err
 	}
 	defer encFd.Close()
 
-	encFi, err := c.loadEncryptedFileInfo(encFd)
+	encFi, err := loadEncryptedFileInfo(encFd)
 	if err != nil {
 		return fmt.Errorf("%s: loading metadata trailer: %w", path, err)
 	}
@@ -147,7 +153,7 @@ func (c *CLI) process(srcFs fs.Filesystem, dstFs fs.Filesystem, path string) err
 	// in native format, while protocol expects wire format (slashes).
 	encFi.Name = osutil.NormalizedFilename(encFi.Name)
 
-	plainFi, err := protocol.DecryptFileInfo(*encFi, c.folderKey)
+	plainFi, err := protocol.DecryptFileInfo(c.keyGen, *encFi, c.folderKey)
 	if err != nil {
 		return fmt.Errorf("%s: decrypting metadata: %w", path, err)
 	}
@@ -158,7 +164,7 @@ func (c *CLI) process(srcFs fs.Filesystem, dstFs fs.Filesystem, path string) err
 
 	var plainFd fs.File
 	if dstFs != nil {
-		if err := dstFs.MkdirAll(filepath.Dir(plainFi.Name), 0700); err != nil {
+		if err := dstFs.MkdirAll(filepath.Dir(plainFi.Name), 0o700); err != nil {
 			return fmt.Errorf("%s: %w", plainFi.Name, err)
 		}
 
@@ -167,6 +173,9 @@ func (c *CLI) process(srcFs fs.Filesystem, dstFs fs.Filesystem, path string) err
 			return fmt.Errorf("%s: %w", plainFi.Name, err)
 		}
 		defer plainFd.Close() // also closed explicitly in the return
+		if err := dstFs.Chmod(plainFi.Name, fs.FileMode(plainFi.Permissions&uint32(retainBits))); err != nil {
+			return fmt.Errorf("%s: %w", plainFi.Name, err)
+		}
 	}
 
 	if err := c.decryptFile(encFi, &plainFi, encFd, plainFd); err != nil {
@@ -183,7 +192,12 @@ func (c *CLI) process(srcFs fs.Filesystem, dstFs fs.Filesystem, path string) err
 	}
 
 	if plainFd != nil {
-		return plainFd.Close()
+		if err := plainFd.Close(); err != nil {
+			return fmt.Errorf("%s: %w", plainFi.Name, err)
+		}
+		if err := dstFs.Chtimes(plainFi.Name, plainFi.ModTime(), plainFi.ModTime()); err != nil {
+			return fmt.Errorf("%s: %w", plainFi.Name, err)
+		}
 	}
 	return nil
 }
@@ -197,7 +211,7 @@ func (c *CLI) decryptFile(encFi *protocol.FileInfo, plainFi *protocol.FileInfo,
 		return fmt.Errorf("block count mismatch: encrypted %d != plaintext %d", len(encFi.Blocks), len(plainFi.Blocks))
 	}
 
-	fileKey := protocol.FileKey(plainFi.Name, c.folderKey)
+	fileKey := c.keyGen.FileKey(plainFi.Name, c.folderKey)
 	for i, encBlock := range encFi.Blocks {
 		// Read the encrypted block
 		buf := make([]byte, encBlock.Size)
@@ -246,7 +260,7 @@ func (c *CLI) decryptFile(encFi *protocol.FileInfo, plainFi *protocol.FileInfo,
 
 // loadEncryptedFileInfo loads the encrypted FileInfo trailer from a file on
 // disk.
-func (c *CLI) loadEncryptedFileInfo(fd fs.File) (*protocol.FileInfo, error) {
+func loadEncryptedFileInfo(fd fs.File) (*protocol.FileInfo, error) {
 	// Seek to the size of the trailer block
 	if _, err := fd.Seek(-4, io.SeekEnd); err != nil {
 		return nil, err

cmd/syncthing/generate/generate.go

@@ -0,0 +1,136 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+// Package generate implements the `syncthing generate` subcommand.
+package generate
+
+import (
+	"bufio"
+	"context"
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/syncthing/syncthing/cmd/syncthing/cmdutil"
+	"github.com/syncthing/syncthing/lib/config"
+	"github.com/syncthing/syncthing/lib/events"
+	"github.com/syncthing/syncthing/lib/fs"
+	"github.com/syncthing/syncthing/lib/locations"
+	"github.com/syncthing/syncthing/lib/logger"
+	"github.com/syncthing/syncthing/lib/osutil"
+	"github.com/syncthing/syncthing/lib/protocol"
+	"github.com/syncthing/syncthing/lib/syncthing"
+)
+
+type CLI struct {
+	cmdutil.CommonOptions
+	GUIUser     string `placeholder:"STRING" help:"Specify new GUI authentication user name"`
+	GUIPassword string `placeholder:"STRING" help:"Specify new GUI authentication password (use - to read from standard input)"`
+}
+
+func (c *CLI) Run(l logger.Logger) error {
+	if c.HideConsole {
+		osutil.HideConsole()
+	}
+
+	if c.HomeDir != "" {
+		if c.ConfDir != "" {
+			return errors.New("--home must not be used together with --config")
+		}
+		c.ConfDir = c.HomeDir
+	}
+	if c.ConfDir == "" {
+		c.ConfDir = locations.GetBaseDir(locations.ConfigBaseDir)
+	}
+
+	// Support reading the password from a pipe or similar
+	if c.GUIPassword == "-" {
+		reader := bufio.NewReader(os.Stdin)
+		password, _, err := reader.ReadLine()
+		if err != nil {
+			return fmt.Errorf("failed reading GUI password: %w", err)
+		}
+		c.GUIPassword = string(password)
+	}
+
+	if err := Generate(l, c.ConfDir, c.GUIUser, c.GUIPassword, c.NoDefaultFolder, c.SkipPortProbing); err != nil {
+		return fmt.Errorf("failed to generate config and keys: %w", err)
+	}
+	return nil
+}
+
+func Generate(l logger.Logger, confDir, guiUser, guiPassword string, noDefaultFolder, skipPortProbing bool) error {
+	dir, err := fs.ExpandTilde(confDir)
+	if err != nil {
+		return err
+	}
+
+	if err := syncthing.EnsureDir(dir, 0700); err != nil {
+		return err
+	}
+	locations.SetBaseDir(locations.ConfigBaseDir, dir)
+
+	var myID protocol.DeviceID
+	certFile, keyFile := locations.Get(locations.CertFile), locations.Get(locations.KeyFile)
+	cert, err := tls.LoadX509KeyPair(certFile, keyFile)
+	if err == nil {
+		l.Warnln("Key exists; will not overwrite.")
+	} else {
+		cert, err = syncthing.GenerateCertificate(certFile, keyFile)
+		if err != nil {
+			return fmt.Errorf("create certificate: %w", err)
+		}
+	}
+	myID = protocol.NewDeviceID(cert.Certificate[0])
+	l.Infoln("Device ID:", myID)
+
+	cfgFile := locations.Get(locations.ConfigFile)
+	cfg, _, err := config.Load(cfgFile, myID, events.NoopLogger)
+	if fs.IsNotExist(err) {
+		if cfg, err = syncthing.DefaultConfig(cfgFile, myID, events.NoopLogger, noDefaultFolder, skipPortProbing); err != nil {
+			return fmt.Errorf("create config: %w", err)
+		}
+	} else if err != nil {
+		return fmt.Errorf("load config: %w", err)
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	go cfg.Serve(ctx)
+	defer cancel()
+
+	var updateErr error
+	waiter, err := cfg.Modify(func(cfg *config.Configuration) {
+		updateErr = updateGUIAuthentication(l, &cfg.GUI, guiUser, guiPassword)
+	})
+	if err != nil {
+		return fmt.Errorf("modify config: %w", err)
+	}
+
+	waiter.Wait()
+	if updateErr != nil {
+		return updateErr
+	}
+	if err := cfg.Save(); err != nil {
+		return fmt.Errorf("save config: %w", err)
+	}
+	return nil
+}
+
+func updateGUIAuthentication(l logger.Logger, guiCfg *config.GUIConfiguration, guiUser, guiPassword string) error {
+	if guiUser != "" && guiCfg.User != guiUser {
+		guiCfg.User = guiUser
+		l.Infoln("Updated GUI authentication user name:", guiUser)
+	}
+
+	if guiPassword != "" && guiCfg.Password != guiPassword {
+		if err := guiCfg.HashAndSetPassword(guiPassword); err != nil {
+			return fmt.Errorf("failed to set GUI authentication password: %w", err)
+		}
+		l.Infoln("Updated GUI authentication password.")
+	}
+	return nil
+}

cmd/syncthing/main.go

@@ -10,9 +10,9 @@ import (
 	"bytes"
 	"context"
 	"crypto/tls"
+	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"net/http"
 	_ "net/http/pprof" // Need to import this to support STPROFILER.
@@ -34,7 +34,9 @@ import (
 	"github.com/thejerf/suture/v4"
 
 	"github.com/syncthing/syncthing/cmd/syncthing/cli"
+	"github.com/syncthing/syncthing/cmd/syncthing/cmdutil"
 	"github.com/syncthing/syncthing/cmd/syncthing/decrypt"
+	"github.com/syncthing/syncthing/cmd/syncthing/generate"
 	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/config"
 	"github.com/syncthing/syncthing/lib/db"
@@ -48,16 +50,11 @@ import (
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/svcutil"
 	"github.com/syncthing/syncthing/lib/syncthing"
-	"github.com/syncthing/syncthing/lib/tlsutil"
 	"github.com/syncthing/syncthing/lib/upgrade"
-
-	"github.com/pkg/errors"
 )
 
 const (
-	tlsDefaultCommonName   = "syncthing"
-	deviceCertLifetimeDays = 20 * 365
-	sigTerm                = syscall.Signal(15)
+	sigTerm = syscall.Signal(15)
 )
 
 const (
@@ -70,14 +67,14 @@ The --logflags value is a sum of the following:
    8  Long filename
   16  Short filename
 
-I.e. to prefix each log line with date and time, set --logflags=3 (1 + 2 from
-above). The value 0 is used to disable all of the above. The default is to
-show time only (2).
+I.e. to prefix each log line with time and filename, set --logflags=18 (2 + 16
+from above). The value 0 is used to disable all of the above. The default is
+to show date and time (3).
 
 Logging always happens to the command line (stdout) and optionally to the
-file at the path specified by -logfile=path. In addition to an path, the special
+file at the path specified by --logfile=path. In addition to an path, the special
 values "default" and "-" may be used. The former logs to DATADIR/syncthing.log
-(see -data-dir), which is the default on Windows, and the latter only to stdout,
+(see --data), which is the default on Windows, and the latter only to stdout,
 no file, which is the default anywhere else.
 
 
@@ -134,32 +131,30 @@ var (
 // commands and options here are top level commands to syncthing.
 // Cli is just a placeholder for the help text (see main).
 var entrypoint struct {
-	Serve   serveOptions `cmd:"" help:"Run Syncthing"`
-	Decrypt decrypt.CLI  `cmd:"" help:"Decrypt or verify an encrypted folder"`
-	Cli     struct{}     `cmd:"" help:"Command line interface for Syncthing"`
+	Serve    serveOptions `cmd:"" help:"Run Syncthing"`
+	Generate generate.CLI `cmd:"" help:"Generate key and config, then exit"`
+	Decrypt  decrypt.CLI  `cmd:"" help:"Decrypt or verify an encrypted folder"`
+	Cli      struct{}     `cmd:"" help:"Command line interface for Syncthing"`
 }
 
 // serveOptions are the options for the `syncthing serve` command.
 type serveOptions struct {
-	buildServeOptions
+	cmdutil.CommonOptions
 	AllowNewerConfig bool   `help:"Allow loading newer than current config version"`
 	Audit            bool   `help:"Write events to audit file"`
 	AuditFile        string `name:"auditfile" placeholder:"PATH" help:"Specify audit file (use \"-\" for stdout, \"--\" for stderr)"`
 	BrowserOnly      bool   `help:"Open GUI in browser"`
-	ConfDir          string `name:"conf" placeholder:"PATH" help:"Set configuration directory (config and keys)"`
 	DataDir          string `name:"data" placeholder:"PATH" help:"Set data directory (database and logs)"`
 	DeviceID         bool   `help:"Show the device ID"`
-	GenerateDir      string `name:"generate" placeholder:"PATH" help:"Generate key and config in specified dir, then exit"`
+	GenerateDir      string `name:"generate" placeholder:"PATH" help:"Generate key and config in specified dir, then exit"` //DEPRECATED: replaced by subcommand!
 	GUIAddress       string `name:"gui-address" placeholder:"URL" help:"Override GUI address (e.g. \"http://192.0.2.42:8443\")"`
 	GUIAPIKey        string `name:"gui-apikey" placeholder:"API-KEY" help:"Override GUI API key"`
-	HomeDir          string `name:"home" placeholder:"PATH" help:"Set configuration and data directory"`
 	LogFile          string `name:"logfile" default:"${logFile}" placeholder:"PATH" help:"Log file name (see below)"`
 	LogFlags         int    `name:"logflags" default:"${logFlags}" placeholder:"BITS" help:"Select information in log line prefix (see below)"`
 	LogMaxFiles      int    `placeholder:"N" default:"${logMaxFiles}" name:"log-max-old-files" help:"Number of old files to keep (zero to keep only current)"`
 	LogMaxSize       int    `placeholder:"BYTES" default:"${logMaxSize}" help:"Maximum size of any file (zero to disable log rotation)"`
 	NoBrowser        bool   `help:"Do not start browser"`
 	NoRestart        bool   `env:"STNORESTART" help:"Do not restart Syncthing when exiting due to API/GUI command, upgrade, or crash"`
-	NoDefaultFolder  bool   `env:"STNODEFAULTFOLDER" help:"Don't create the \"default\" folder on first startup"`
 	NoUpgrade        bool   `env:"STNOUPGRADE" help:"Disable automatic upgrades"`
 	Paths            bool   `help:"Show configuration paths"`
 	Paused           bool   `help:"Start with all devices and folders paused"`
@@ -177,7 +172,7 @@ type serveOptions struct {
 	DebugGUIAssetsDir         string        `placeholder:"PATH" help:"Directory to load GUI assets from" env:"STGUIASSETS"`
 	DebugPerfStats            bool          `env:"STPERFSTATS" help:"Write running performance statistics to perf-$pid.csv (Unix only)"`
 	DebugProfileBlock         bool          `env:"STBLOCKPROFILE" help:"Write block profiles to block-$pid-$timestamp.pprof every 20 seconds"`
-	DebugProfileCPU           bool          `help:"Write a CPU profile to cpu-$pid.pprof on exit" env:"CPUPROFILE"`
+	DebugProfileCPU           bool          `help:"Write a CPU profile to cpu-$pid.pprof on exit" env:"STCPUPROFILE"`
 	DebugProfileHeap          bool          `env:"STHEAPPROFILE" help:"Write heap profiles to heap-$pid-$timestamp.pprof each time heap usage increases"`
 	DebugProfilerListen       string        `placeholder:"ADDR" env:"STPROFILER" help:"Network profiler listen address"`
 	DebugResetDatabase        bool          `name:"reset-database" help:"Reset the database, forcing a full rescan and resync"`
@@ -191,7 +186,7 @@ type serveOptions struct {
 func defaultVars() kong.Vars {
 	vars := kong.Vars{}
 
-	vars["logFlags"] = strconv.Itoa(log.Ltime)
+	vars["logFlags"] = strconv.Itoa(logger.DefaultFlags)
 	vars["logMaxSize"] = strconv.Itoa(10 << 20) // 10 MiB
 	vars["logMaxFiles"] = "3"                   // plus the current one
 
@@ -203,7 +198,7 @@ func defaultVars() kong.Vars {
 	// Windows, the "default" options.logFile will later be replaced with the
 	// default path, unless the user has manually specified "-" or
 	// something else.
-	if runtime.GOOS == "windows" {
+	if build.IsWindows {
 		vars["logFile"] = "default"
 	} else {
 		vars["logFile"] = "-"
@@ -256,6 +251,7 @@ func main() {
 
 	ctx, err := parser.Parse(args)
 	parser.FatalIfErrorf(err)
+	ctx.BindTo(l, (*logger.Logger)(nil)) // main logger available to subcommands
 	err = ctx.Run()
 	parser.FatalIfErrorf(err)
 }
@@ -290,39 +286,31 @@ func (options serveOptions) Run() error {
 	}
 
 	// Not set as default above because the strings can be really long.
-	var err error
-	homeSet := options.HomeDir != ""
-	confSet := options.ConfDir != ""
-	dataSet := options.DataDir != ""
-	switch {
-	case dataSet != confSet:
-		err = errors.New("either both or none of -conf and -data must be given, use -home to set both at once")
-	case homeSet && dataSet:
-		err = errors.New("-home must not be used together with -conf and -data")
-	case homeSet:
-		if err = locations.SetBaseDir(locations.ConfigBaseDir, options.HomeDir); err == nil {
-			err = locations.SetBaseDir(locations.DataBaseDir, options.HomeDir)
-		}
-	case dataSet:
-		if err = locations.SetBaseDir(locations.ConfigBaseDir, options.ConfDir); err == nil {
-			err = locations.SetBaseDir(locations.DataBaseDir, options.DataDir)
-		}
-	}
+	err := cmdutil.SetConfigDataLocationsFromFlags(options.HomeDir, options.ConfDir, options.DataDir)
 	if err != nil {
 		l.Warnln("Command line options:", err)
 		os.Exit(svcutil.ExitError.AsInt())
 	}
 
-	if options.LogFile == "default" || options.LogFile == "" {
+	// Treat an explicitly empty log file name as no log file
+	if options.LogFile == "" {
+		options.LogFile = "-"
+	}
+	if options.LogFile != "default" {
 		// We must set this *after* expandLocations above.
-		// Handling an empty value is for backwards compatibility (<1.4.1).
-		options.LogFile = locations.Get(locations.LogFile)
+		if err := locations.Set(locations.LogFile, options.LogFile); err != nil {
+			l.Warnln("Setting log file path:", err)
+			os.Exit(svcutil.ExitError.AsInt())
+		}
 	}
 
-	if options.DebugGUIAssetsDir == "" {
+	if options.DebugGUIAssetsDir != "" {
 		// The asset dir is blank if STGUIASSETS wasn't set, in which case we
 		// should look for extra assets in the default place.
-		options.DebugGUIAssetsDir = locations.Get(locations.GUIAssets)
+		if err := locations.Set(locations.GUIAssets, options.DebugGUIAssetsDir); err != nil {
+			l.Warnln("Setting GUI assets path:", err)
+			os.Exit(svcutil.ExitError.AsInt())
+		}
 	}
 
 	if options.Version {
@@ -331,7 +319,7 @@ func (options serveOptions) Run() error {
 	}
 
 	if options.Paths {
-		showPaths(options)
+		fmt.Print(locations.PrettyPaths())
 		return nil
 	}
 
@@ -350,7 +338,7 @@ func (options serveOptions) Run() error {
 	}
 
 	if options.BrowserOnly {
-		if err := openGUI(protocol.EmptyDeviceID); err != nil {
+		if err := openGUI(); err != nil {
 			l.Warnln("Failed to open web UI:", err)
 			os.Exit(svcutil.ExitError.AsInt())
 		}
@@ -358,7 +346,7 @@ func (options serveOptions) Run() error {
 	}
 
 	if options.GenerateDir != "" {
-		if err := generate(options.GenerateDir, options.NoDefaultFolder); err != nil {
+		if err := generate.Generate(l, options.GenerateDir, "", "", options.NoDefaultFolder, options.SkipPortProbing); err != nil {
 			l.Warnln("Failed to generate config and keys:", err)
 			os.Exit(svcutil.ExitError.AsInt())
 		}
@@ -366,7 +354,7 @@ func (options serveOptions) Run() error {
 	}
 
 	// Ensure that our home directory exists.
-	if err := ensureDir(locations.GetBaseDir(locations.ConfigBaseDir), 0700); err != nil {
+	if err := syncthing.EnsureDir(locations.GetBaseDir(locations.ConfigBaseDir), 0700); err != nil {
 		l.Warnln("Failure on home directory:", err)
 		os.Exit(svcutil.ExitError.AsInt())
 	}
@@ -427,13 +415,13 @@ func (options serveOptions) Run() error {
 	return nil
 }
 
-func openGUI(myID protocol.DeviceID) error {
-	cfg, err := loadOrDefaultConfig(myID, events.NoopLogger, true)
+func openGUI() error {
+	cfg, err := loadOrDefaultConfig()
 	if err != nil {
 		return err
 	}
-	if cfg.GUI().Enabled {
-		if err := openURL(cfg.GUI().URL()); err != nil {
+	if guiCfg := cfg.GUI(); guiCfg.Enabled {
+		if err := openURL(guiCfg.URL()); err != nil {
 			return err
 		}
 	} else {
@@ -442,46 +430,6 @@ func openGUI(myID protocol.DeviceID) error {
 	return nil
 }
 
-func generate(generateDir string, noDefaultFolder bool) error {
-	dir, err := fs.ExpandTilde(generateDir)
-	if err != nil {
-		return err
-	}
-
-	if err := ensureDir(dir, 0700); err != nil {
-		return err
-	}
-
-	var myID protocol.DeviceID
-	certFile, keyFile := filepath.Join(dir, "cert.pem"), filepath.Join(dir, "key.pem")
-	cert, err := tls.LoadX509KeyPair(certFile, keyFile)
-	if err == nil {
-		l.Warnln("Key exists; will not overwrite.")
-	} else {
-		cert, err = tlsutil.NewCertificate(certFile, keyFile, tlsDefaultCommonName, deviceCertLifetimeDays)
-		if err != nil {
-			return errors.Wrap(err, "create certificate")
-		}
-	}
-	myID = protocol.NewDeviceID(cert.Certificate[0])
-	l.Infoln("Device ID:", myID)
-
-	cfgFile := filepath.Join(dir, "config.xml")
-	if _, err := os.Stat(cfgFile); err == nil {
-		l.Warnln("Config exists; will not overwrite.")
-		return nil
-	}
-	cfg, err := syncthing.DefaultConfig(cfgFile, myID, events.NoopLogger, noDefaultFolder)
-	if err != nil {
-		return err
-	}
-	err = cfg.Save()
-	if err != nil {
-		return errors.Wrap(err, "save config")
-	}
-	return nil
-}
-
 func debugFacilities() string {
 	facilities := l.Facilities()
 
@@ -513,7 +461,7 @@ func (e *errNoUpgrade) Error() string {
 }
 
 func checkUpgrade() (upgrade.Release, error) {
-	cfg, err := loadOrDefaultConfig(protocol.EmptyDeviceID, events.NoopLogger, true)
+	cfg, err := loadOrDefaultConfig()
 	if err != nil {
 		return upgrade.Release{}, err
 	}
@@ -532,7 +480,11 @@ func checkUpgrade() (upgrade.Release, error) {
 }
 
 func upgradeViaRest() error {
-	cfg, _ := loadOrDefaultConfig(protocol.EmptyDeviceID, events.NoopLogger, true)
+	cfg, err := loadOrDefaultConfig()
+	if err != nil {
+		return err
+	}
+
 	u, err := url.Parse(cfg.GUI().URL())
 	if err != nil {
 		return err
@@ -556,7 +508,7 @@ func upgradeViaRest() error {
 		return err
 	}
 	if resp.StatusCode != 200 {
-		bs, err := ioutil.ReadAll(resp.Body)
+		bs, err := io.ReadAll(resp.Body)
 		defer resp.Body.Close()
 		if err != nil {
 			return err
@@ -608,7 +560,7 @@ func syncthingMain(options serveOptions) {
 	evLogger := events.NewLogger()
 	earlyService.Add(evLogger)
 
-	cfgWrapper, err := syncthing.LoadConfigAtStartup(locations.Get(locations.ConfigFile), cert, evLogger, options.AllowNewerConfig, options.NoDefaultFolder)
+	cfgWrapper, err := syncthing.LoadConfigAtStartup(locations.Get(locations.ConfigFile), cert, evLogger, options.AllowNewerConfig, options.NoDefaultFolder, options.SkipPortProbing)
 	if err != nil {
 		l.Warnln("Failed to initialize config:", err)
 		os.Exit(svcutil.ExitError.AsInt())
@@ -640,7 +592,7 @@ func syncthingMain(options serveOptions) {
 	}
 
 	// Check if auto-upgrades is possible, and if yes, and it's enabled do an initial
-	// upgrade immedately. The auto-upgrade routine can only be started
+	// upgrade immediately. The auto-upgrade routine can only be started
 	// later after App is initialised.
 
 	autoUpgradePossible := autoUpgradePossible(options)
@@ -669,7 +621,6 @@ func syncthingMain(options serveOptions) {
 	}
 
 	appOpts := syncthing.Options{
-		AssetDir:             options.DebugGUIAssetsDir,
 		DeadlockTimeoutS:     options.DebugDeadlockTimeout,
 		NoUpgrade:            options.NoUpgrade,
 		ProfilerAddr:         options.DebugProfilerListen,
@@ -704,7 +655,7 @@ func syncthingMain(options serveOptions) {
 
 	setupSignalHandling(app)
 
-	if len(os.Getenv("GOMAXPROCS")) == 0 {
+	if os.Getenv("GOMAXPROCS") == "" {
 		runtime.GOMAXPROCS(runtime.NumCPU())
 	}
 
@@ -720,8 +671,6 @@ func syncthingMain(options serveOptions) {
 		}
 	}
 
-	go standbyMonitor(app, cfgWrapper)
-
 	if err := app.Start(); err != nil {
 		os.Exit(svcutil.ExitError.AsInt())
 	}
@@ -768,12 +717,15 @@ func setupSignalHandling(app *syncthing.App) {
 	}()
 }
 
-func loadOrDefaultConfig(myID protocol.DeviceID, evLogger events.Logger, noDefaultFolder bool) (config.Wrapper, error) {
+// loadOrDefaultConfig creates a temporary, minimal configuration wrapper if no file
+// exists.  As it disregards some command-line options, that should never be persisted.
+func loadOrDefaultConfig() (config.Wrapper, error) {
 	cfgFile := locations.Get(locations.ConfigFile)
-	cfg, _, err := config.Load(cfgFile, myID, evLogger)
+	cfg, _, err := config.Load(cfgFile, protocol.EmptyDeviceID, events.NoopLogger)
 
 	if err != nil {
-		cfg, err = syncthing.DefaultConfig(cfgFile, myID, evLogger, noDefaultFolder)
+		newCfg := config.New(protocol.EmptyDeviceID)
+		return config.Wrap(cfgFile, newCfg, protocol.EmptyDeviceID, events.NoopLogger), nil
 	}
 
 	return cfg, err
@@ -815,49 +767,6 @@ func resetDB() error {
 	return os.RemoveAll(locations.Get(locations.Database))
 }
 
-func ensureDir(dir string, mode fs.FileMode) error {
-	fs := fs.NewFilesystem(fs.FilesystemTypeBasic, dir)
-	err := fs.MkdirAll(".", mode)
-	if err != nil {
-		return err
-	}
-
-	if fi, err := fs.Stat("."); err == nil {
-		// Apprently the stat may fail even though the mkdirall passed. If it
-		// does, we'll just assume things are in order and let other things
-		// fail (like loading or creating the config...).
-		currentMode := fi.Mode() & 0777
-		if currentMode != mode {
-			err := fs.Chmod(".", mode)
-			// This can fail on crappy filesystems, nothing we can do about it.
-			if err != nil {
-				l.Warnln(err)
-			}
-		}
-	}
-	return nil
-}
-
-func standbyMonitor(app *syncthing.App, cfg config.Wrapper) {
-	restartDelay := 60 * time.Second
-	now := time.Now()
-	for {
-		time.Sleep(10 * time.Second)
-		if time.Since(now) > 2*time.Minute && cfg.Options().RestartOnWakeup {
-			l.Infof("Paused state detected, possibly woke up from standby. Restarting in %v.", restartDelay)
-
-			// We most likely just woke from standby. If we restart
-			// immediately chances are we won't have networking ready. Give
-			// things a moment to stabilize.
-			time.Sleep(restartDelay)
-
-			app.Stop(svcutil.ExitRestart)
-			return
-		}
-		now = time.Now()
-	}
-}
-
 func autoUpgradePossible(options serveOptions) bool {
 	if upgrade.DisabledByCompilation {
 		return false
@@ -989,16 +898,6 @@ func cleanConfigDirectory() {
 	}
 }
 
-func showPaths(options serveOptions) {
-	fmt.Printf("Configuration file:\n\t%s\n\n", locations.Get(locations.ConfigFile))
-	fmt.Printf("Database directory:\n\t%s\n\n", locations.Get(locations.Database))
-	fmt.Printf("Device private key & certificate files:\n\t%s\n\t%s\n\n", locations.Get(locations.KeyFile), locations.Get(locations.CertFile))
-	fmt.Printf("HTTPS private key & certificate files:\n\t%s\n\t%s\n\n", locations.Get(locations.HTTPSKeyFile), locations.Get(locations.HTTPSCertFile))
-	fmt.Printf("Log file:\n\t%s\n\n", options.LogFile)
-	fmt.Printf("GUI override directory:\n\t%s\n\n", options.DebugGUIAssetsDir)
-	fmt.Printf("Default sync folder directory:\n\t%s\n\n", locations.Get(locations.DefFolder))
-}
-
 func setPauseState(cfgWrapper config.Wrapper, paused bool) {
 	_, err := cfgWrapper.Modify(func(cfg *config.Configuration) {
 		for i := range cfg.Devices {

cmd/syncthing/monitor.go

@@ -15,16 +15,14 @@ import (
 	"os/exec"
 	"os/signal"
 	"path/filepath"
-	"runtime"
 	"strings"
 	"syscall"
 	"time"
 
-	"github.com/syncthing/syncthing/lib/events"
+	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/fs"
 	"github.com/syncthing/syncthing/lib/locations"
 	"github.com/syncthing/syncthing/lib/osutil"
-	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/svcutil"
 	"github.com/syncthing/syncthing/lib/sync"
 )
@@ -50,7 +48,7 @@ func monitorMain(options serveOptions) {
 
 	var dst io.Writer = os.Stdout
 
-	logFile := options.LogFile
+	logFile := locations.Get(locations.LogFile)
 	if logFile != "-" {
 		if expanded, err := fs.ExpandTilde(logFile); err == nil {
 			logFile = expanded
@@ -68,7 +66,7 @@ func monitorMain(options serveOptions) {
 		if err != nil {
 			l.Warnln("Failed to setup logging to file, proceeding with logging to stdout only:", err)
 		} else {
-			if runtime.GOOS == "windows" {
+			if build.IsWindows {
 				// Translate line breaks to Windows standard
 				fileDst = osutil.ReplacingWriter{
 					Writer: fileDst,
@@ -85,6 +83,11 @@ func monitorMain(options serveOptions) {
 	}
 
 	args := os.Args
+	binary, err := getBinary(args[0])
+	if err != nil {
+		l.Warnln("Error starting the main Syncthing process:", err)
+		panic("Error starting the main Syncthing process")
+	}
 	var restarts [restartCounts]time.Time
 
 	stopSign := make(chan os.Signal, 1)
@@ -106,7 +109,7 @@ func monitorMain(options serveOptions) {
 		copy(restarts[0:], restarts[1:])
 		restarts[len(restarts)-1] = time.Now()
 
-		cmd := exec.Command(args[0], args[1:]...)
+		cmd := exec.Command(binary, args[1:]...)
 		cmd.Env = childEnv
 
 		stderr, err := cmd.StderrPipe()
@@ -182,7 +185,7 @@ func monitorMain(options serveOptions) {
 				// Restart the monitor process to release the .old
 				// binary as part of the upgrade process.
 				l.Infoln("Restarting monitor...")
-				if err = restartMonitor(args); err != nil {
+				if err = restartMonitor(binary, args); err != nil {
 					l.Warnln("Restart:", err)
 				}
 				os.Exit(exitCode)
@@ -205,6 +208,19 @@ func monitorMain(options serveOptions) {
 	}
 }
 
+func getBinary(args0 string) (string, error) {
+	e, err := os.Executable()
+	if err == nil {
+		return e, nil
+	}
+	// Check if args0 cuts it
+	e, lerr := exec.LookPath(args0)
+	if lerr == nil {
+		return e, nil
+	}
+	return "", err
+}
+
 func copyStderr(stderr io.Reader, dst io.Writer) {
 	br := bufio.NewReader(stderr)
 
@@ -257,7 +273,7 @@ func copyStderr(stderr io.Reader, dst io.Writer) {
 * This crash usually occurs due to one of the following reasons:                *
 *  - Syncthing being stopped abruptly (killed/loss of power)                    *
 *  - Bad hardware (memory/disk issues)                                          *
-*  - Software that affects disk writes (SSD caching software and simillar)      *
+*  - Software that affects disk writes (SSD caching software and similar)       *
 *                                                                               *
 * Please see the following URL for instructions on how to recover:              *
 *   https://docs.syncthing.net/users/faq.html#my-syncthing-database-is-corrupt  *
@@ -311,40 +327,30 @@ func copyStdout(stdout io.Reader, dst io.Writer) {
 	}
 }
 
-func restartMonitor(args []string) error {
+func restartMonitor(binary string, args []string) error {
 	// Set the STRESTART environment variable to indicate to the next
 	// process that this is a restart and not initial start. This prevents
 	// opening the browser on startup.
 	os.Setenv("STRESTART", "yes")
 
-	if runtime.GOOS != "windows" {
+	if !build.IsWindows {
 		// syscall.Exec is the cleanest way to restart on Unixes as it
 		// replaces the current process with the new one, keeping the pid and
 		// controlling terminal and so on
-		return restartMonitorUnix(args)
+		return restartMonitorUnix(binary, args)
 	}
 
 	// but it isn't supported on Windows, so there we start a normal
 	// exec.Command and return.
-	return restartMonitorWindows(args)
+	return restartMonitorWindows(binary, args)
 }
 
-func restartMonitorUnix(args []string) error {
-	if !strings.ContainsRune(args[0], os.PathSeparator) {
-		// The path to the binary doesn't contain a slash, so it should be
-		// found in $PATH.
-		binary, err := exec.LookPath(args[0])
-		if err != nil {
-			return err
-		}
-		args[0] = binary
-	}
-
+func restartMonitorUnix(binary string, args []string) error {
 	return syscall.Exec(args[0], args, os.Environ())
 }
 
-func restartMonitorWindows(args []string) error {
-	cmd := exec.Command(args[0], args[1:]...)
+func restartMonitorWindows(binary string, args []string) error {
+	cmd := exec.Command(binary, args[1:]...)
 	// Retain the standard streams
 	cmd.Stderr = os.Stderr
 	cmd.Stdout = os.Stdout
@@ -564,7 +570,7 @@ func childEnv() []string {
 // panicUploadMaxWait uploading panics...
 func maybeReportPanics() {
 	// Try to get a config to see if/where panics should be reported.
-	cfg, err := loadOrDefaultConfig(protocol.EmptyDeviceID, events.NoopLogger, true)
+	cfg, err := loadOrDefaultConfig()
 	if err != nil {
 		l.Warnln("Couldn't load config; not reporting crash")
 		return

cmd/syncthing/monitor_test.go

@@ -8,7 +8,6 @@ package main
 
 import (
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -18,14 +17,17 @@ import (
 func TestRotatedFile(t *testing.T) {
 	// Verify that log rotation happens.
 
-	dir, err := ioutil.TempDir("", "syncthing")
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer os.RemoveAll(dir)
+	dir := t.TempDir()
 
 	open := func(name string) (io.WriteCloser, error) {
-		return os.Create(name)
+		f, err := os.Create(name)
+		t.Cleanup(func() {
+			if f != nil {
+				_ = f.Close()
+			}
+		})
+
+		return f, err
 	}
 
 	logName := filepath.Join(dir, "log.txt")
@@ -179,7 +181,7 @@ func TestAutoClosedFile(t *testing.T) {
 	}
 
 	// The file should have both writes in it.
-	bs, err := ioutil.ReadFile(file)
+	bs, err := os.ReadFile(file)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -199,7 +201,7 @@ func TestAutoClosedFile(t *testing.T) {
 	}
 
 	// It should now contain three writes, as the file is always opened for appending
-	bs, err = ioutil.ReadFile(file)
+	bs, err = os.ReadFile(file)
 	if err != nil {
 		t.Fatal(err)
 	}

cmd/syncthing/openurl_unix.go

@@ -4,26 +4,25 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
+//go:build !windows
 // +build !windows
 
 package main
 
 import (
 	"os/exec"
-	"runtime"
 	"syscall"
+
+	"github.com/syncthing/syncthing/lib/build"
 )
 
 func openURL(url string) error {
-	switch runtime.GOOS {
-	case "darwin":
+	if build.IsDarwin {
 		return exec.Command("open", url).Run()
-
-	default:
-		cmd := exec.Command("xdg-open", url)
-		cmd.SysProcAttr = &syscall.SysProcAttr{
-			Setpgid: true,
-		}
-		return cmd.Run()
 	}
+	cmd := exec.Command("xdg-open", url)
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		Setpgid: true,
+	}
+	return cmd.Run()
 }

cmd/syncthing/openurl_windows.go

@@ -4,6 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
+//go:build windows
 // +build windows
 
 package main

cmd/syncthing/perfstats_unix.go

@@ -4,6 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
+//go:build !solaris && !windows
 // +build !solaris,!windows
 
 package main

cmd/syncthing/perfstats_unsupported.go

@@ -4,6 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
+//go:build solaris || windows
 // +build solaris windows
 
 package main

cmd/syncthing/traceback.go

@@ -4,7 +4,8 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
-//+build go1.7
+//go:build go1.7
+// +build go1.7
 
 package main
 

cmd/uraggregate/main.go

@@ -47,32 +47,25 @@ func main() {
 func runAggregation(db *sql.DB) {
 	since := maxIndexedDay(db, "VersionSummary")
 	log.Println("Aggregating VersionSummary data since", since)
-	rows, err := aggregateVersionSummary(db, since)
+	rows, err := aggregateVersionSummary(db, since.Add(24*time.Hour))
 	if err != nil {
-		log.Fatalln("aggregate:", err)
+		log.Println("aggregate:", err)
 	}
 	log.Println("Inserted", rows, "rows")
 
-	log.Println("Aggregating UserMovement data")
-	rows, err = aggregateUserMovement(db)
-	if err != nil {
-		log.Fatalln("aggregate:", err)
-	}
-	log.Println("Inserted", rows, "rows")
-
-	log.Println("Aggregating Performance data")
 	since = maxIndexedDay(db, "Performance")
-	rows, err = aggregatePerformance(db, since)
+	log.Println("Aggregating Performance data since", since)
+	rows, err = aggregatePerformance(db, since.Add(24*time.Hour))
 	if err != nil {
-		log.Fatalln("aggregate:", err)
+		log.Println("aggregate:", err)
 	}
 	log.Println("Inserted", rows, "rows")
 
-	log.Println("Aggregating BlockStats data")
 	since = maxIndexedDay(db, "BlockStats")
-	rows, err = aggregateBlockStats(db, since)
+	log.Println("Aggregating BlockStats data since", since)
+	rows, err = aggregateBlockStats(db, since.Add(24*time.Hour))
 	if err != nil {
-		log.Fatalln("aggregate:", err)
+		log.Println("aggregate:", err)
 	}
 	log.Println("Inserted", rows, "rows")
 }
@@ -119,13 +112,13 @@ func setupDB(db *sql.DB) error {
 	_, err = db.Exec(`CREATE TABLE IF NOT EXISTS BlockStats (
 		Day TIMESTAMP NOT NULL,
 		Reports INTEGER NOT NULL,
-		Total INTEGER NOT NULL,
-		Renamed INTEGER NOT NULL,
-		Reused INTEGER NOT NULL,
-		Pulled INTEGER NOT NULL,
-		CopyOrigin INTEGER NOT NULL,
-		CopyOriginShifted INTEGER NOT NULL,
-		CopyElsewhere INTEGER NOT NULL
+		Total BIGINT NOT NULL,
+		Renamed BIGINT NOT NULL,
+		Reused BIGINT NOT NULL,
+		Pulled BIGINT NOT NULL,
+		CopyOrigin BIGINT NOT NULL,
+		CopyOriginShifted BIGINT NOT NULL,
+		CopyElsewhere BIGINT NOT NULL
 	)`)
 	if err != nil {
 		return err
@@ -163,7 +156,7 @@ func setupDB(db *sql.DB) error {
 
 func maxIndexedDay(db *sql.DB, table string) time.Time {
 	var t time.Time
-	row := db.QueryRow("SELECT MAX(Day) FROM " + table)
+	row := db.QueryRow("SELECT MAX(DATE_TRUNC('day', Day)) FROM " + table)
 	err := row.Scan(&t)
 	if err != nil {
 		return time.Time{}
@@ -179,8 +172,8 @@ func aggregateVersionSummary(db *sql.DB, since time.Time) (int64, error) {
 		COUNT(*) AS Count
 		FROM ReportsJson
 		WHERE
-			DATE_TRUNC('day', Received) > $1
-			AND DATE_TRUNC('day', Received) < DATE_TRUNC('day', NOW())
+			Received > $1
+			AND Received < DATE_TRUNC('day', NOW())
 			AND Report->>'version' like 'v_.%'
 		GROUP BY Day, Ver
 		);
@@ -198,7 +191,8 @@ func aggregateUserMovement(db *sql.DB) (int64, error) {
 		Report->>'uniqueID'
 		FROM ReportsJson
 		WHERE
-			DATE_TRUNC('day', Received) < DATE_TRUNC('day', NOW())
+			Report->>'uniqueID' IS NOT NULL
+			AND Received < DATE_TRUNC('day', NOW())
 			AND Report->>'version' like 'v_.%'
 		ORDER BY Day
 	`)
@@ -283,9 +277,11 @@ func aggregatePerformance(db *sql.DB, since time.Time) (int64, error) {
 		AVG((Report->>'memoryUsageMiB')::numeric) As MemoryUsageMiB
 		FROM ReportsJson
 		WHERE
-			DATE_TRUNC('day', Received) > $1
-			AND DATE_TRUNC('day', Received) < DATE_TRUNC('day', NOW())
+			Received > $1
+			AND Received < DATE_TRUNC('day', NOW())
 			AND Report->>'version' like 'v_.%'
+			/* Some custom implementation reported bytes when we expect megabytes, cap at petabyte */
+			AND (Report->>'memorySize')::numeric < 1073741824
 		GROUP BY Day
 		);
 	`, since)
@@ -303,17 +299,17 @@ func aggregateBlockStats(db *sql.DB, since time.Time) (int64, error) {
 	SELECT
 		DATE_TRUNC('day', Received) AS Day,
 		COUNT(1) As Reports,
-		SUM((Report->'blockStats'->>'total')::numeric) AS Total,
-		SUM((Report->'blockStats'->>'renamed')::numeric) AS Renamed,
-		SUM((Report->'blockStats'->>'reused')::numeric) AS Reused,
-		SUM((Report->'blockStats'->>'pulled')::numeric) AS Pulled,
-		SUM((Report->'blockStats'->>'copyOrigin')::numeric) AS CopyOrigin,
-		SUM((Report->'blockStats'->>'copyOriginShifted')::numeric) AS CopyOriginShifted,
-		SUM((Report->'blockStats'->>'copyElsewhere')::numeric) AS CopyElsewhere
+		SUM((Report->'blockStats'->>'total')::numeric)::bigint AS Total,
+		SUM((Report->'blockStats'->>'renamed')::numeric)::bigint AS Renamed,
+		SUM((Report->'blockStats'->>'reused')::numeric)::bigint AS Reused,
+		SUM((Report->'blockStats'->>'pulled')::numeric)::bigint AS Pulled,
+		SUM((Report->'blockStats'->>'copyOrigin')::numeric)::bigint AS CopyOrigin,
+		SUM((Report->'blockStats'->>'copyOriginShifted')::numeric)::bigint AS CopyOriginShifted,
+		SUM((Report->'blockStats'->>'copyElsewhere')::numeric)::bigint AS CopyElsewhere
 		FROM ReportsJson
 		WHERE
-			DATE_TRUNC('day', Received) > $1
-			AND DATE_TRUNC('day', Received) < DATE_TRUNC('day', NOW())
+			Received > $1
+			AND Received < DATE_TRUNC('day', NOW())
 			AND (Report->>'urVersion')::numeric >= 3
 			AND Report->>'version' like 'v_.%'
 			AND Report->>'version' NOT LIKE 'v0.14.40%'

cmd/ursrv/main.go

@@ -13,7 +13,6 @@ import (
 	"encoding/json"
 	"html/template"
 	"io"
-	"io/ioutil"
 	"log"
 	"net"
 	"net/http"
@@ -26,7 +25,10 @@ import (
 	"time"
 	"unicode"
 
+	_ "github.com/lib/pq" // PostgreSQL driver
 	"github.com/oschwald/geoip2-golang"
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
 
 	"github.com/syncthing/syncthing/lib/upgrade"
 	"github.com/syncthing/syncthing/lib/ur/contract"
@@ -48,19 +50,19 @@ var (
 	knownDistributions = []distributionMatch{
 		// Maps well known builders to the official distribution method that
 		// they represent
-		{regexp.MustCompile("android-.*teamcity@build.syncthing.net"), "Google Play"},
-		{regexp.MustCompile("teamcity@build.syncthing.net"), "GitHub"},
-		{regexp.MustCompile("deb@build.syncthing.net"), "APT"},
-		{regexp.MustCompile("docker@syncthing.net"), "Docker Hub"},
-		{regexp.MustCompile("jenkins@build.syncthing.net"), "GitHub"},
-		{regexp.MustCompile("snap@build.syncthing.net"), "Snapcraft"},
-		{regexp.MustCompile("android-.*vagrant@basebox-stretch64"), "F-Droid"},
-		{regexp.MustCompile("builduser@(archlinux|svetlemodry)"), "Arch (3rd party)"},
-		{regexp.MustCompile("synology@kastelo.net"), "Synology (Kastelo)"},
-		{regexp.MustCompile("@debian"), "Debian (3rd party)"},
-		{regexp.MustCompile("@fedora"), "Fedora (3rd party)"},
+		{regexp.MustCompile(`android-.*teamcity@build\.syncthing\.net`), "Google Play"},
+		{regexp.MustCompile(`teamcity@build\.syncthing\.net`), "GitHub"},
+		{regexp.MustCompile(`deb@build\.syncthing\.net`), "APT"},
+		{regexp.MustCompile(`docker@syncthing\.net`), "Docker Hub"},
+		{regexp.MustCompile(`jenkins@build\.syncthing\.net`), "GitHub"},
+		{regexp.MustCompile(`snap@build\.syncthing\.net`), "Snapcraft"},
+		{regexp.MustCompile(`android-.*vagrant@basebox-stretch64`), "F-Droid"},
+		{regexp.MustCompile(`builduser@(archlinux|svetlemodry)`), "Arch (3rd party)"},
+		{regexp.MustCompile(`synology@kastelo\.net`), "Synology (Kastelo)"},
+		{regexp.MustCompile(`@debian`), "Debian (3rd party)"},
+		{regexp.MustCompile(`@fedora`), "Fedora (3rd party)"},
 		{regexp.MustCompile(`\bbrew@`), "Homebrew (3rd party)"},
-		{regexp.MustCompile("."), "Others"},
+		{regexp.MustCompile(`.`), "Others"},
 	}
 )
 
@@ -130,11 +132,6 @@ func setupDB(db *sql.DB) error {
 		}
 	}
 
-	// Migrate from old schema to new schema if the table exists.
-	if err := migrate(db); err != nil {
-		return err
-	}
-
 	return nil
 }
 
@@ -162,7 +159,7 @@ func main() {
 	if err != nil {
 		log.Fatalln("template:", err)
 	}
-	bs, err := ioutil.ReadAll(fd)
+	bs, err := io.ReadAll(fd)
 	if err != nil {
 		log.Fatalln("template:", err)
 	}
@@ -285,7 +282,7 @@ func rootHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-func locationsHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
+func locationsHandler(db *sql.DB, w http.ResponseWriter, _ *http.Request) {
 	cacheMut.Lock()
 	defer cacheMut.Unlock()
 
@@ -324,7 +321,7 @@ func newDataHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
 	rep.Address = addr
 
 	lr := &io.LimitedReader{R: r.Body, N: 40 * 1024}
-	bs, _ := ioutil.ReadAll(lr)
+	bs, _ := io.ReadAll(lr)
 	if err := json.Unmarshal(bs, &rep); err != nil {
 		log.Println("decode:", err)
 		if debug {
@@ -378,7 +375,7 @@ func summaryHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
 	w.Write(bs)
 }
 
-func movementHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
+func movementHandler(db *sql.DB, w http.ResponseWriter, _ *http.Request) {
 	s, err := getMovement(db)
 	if err != nil {
 		log.Println("movementHandler:", err)
@@ -397,7 +394,7 @@ func movementHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
 	w.Write(bs)
 }
 
-func performanceHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
+func performanceHandler(db *sql.DB, w http.ResponseWriter, _ *http.Request) {
 	s, err := getPerformance(db)
 	if err != nil {
 		log.Println("performanceHandler:", err)
@@ -416,7 +413,7 @@ func performanceHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
 	w.Write(bs)
 }
 
-func blockStatsHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
+func blockStatsHandler(db *sql.DB, w http.ResponseWriter, _ *http.Request) {
 	s, err := getBlockStats(db)
 	if err != nil {
 		log.Println("blockStatsHandler:", err)
@@ -581,7 +578,6 @@ func getReport(db *sql.DB) map[string]interface{} {
 
 	for rows.Next() {
 		err := rows.Scan(&rep.Received, &rep)
-
 		if err != nil {
 			log.Println("sql:", err)
 			return nil
@@ -774,7 +770,7 @@ func getReport(db *sql.DB) map[string]interface{} {
 			}
 
 			for transport, count := range rep.TransportStats {
-				add(featureGroups["Connection"]["v3"], "Transport", strings.Title(transport), count)
+				add(featureGroups["Connection"]["v3"], "Transport", cases.Title(language.English).String(transport), count)
 				if strings.HasSuffix(transport, "4") {
 					add(featureGroups["Connection"]["v3"], "IP version", "IPv4", count)
 				} else if strings.HasSuffix(transport, "6") {
@@ -786,72 +782,53 @@ func getReport(db *sql.DB) map[string]interface{} {
 		}
 	}
 
-	var categories []category
-	categories = append(categories, category{
-		Values: statsForInts(totFiles),
-		Descr:  "Files Managed per Device",
-	})
-
-	categories = append(categories, category{
-		Values: statsForInts(maxFiles),
-		Descr:  "Files in Largest Folder",
-	})
-
-	categories = append(categories, category{
-		Values: statsForInt64s(totMiB),
-		Descr:  "Data Managed per Device",
-		Unit:   "B",
-		Type:   NumberBinary,
-	})
-
-	categories = append(categories, category{
-		Values: statsForInt64s(maxMiB),
-		Descr:  "Data in Largest Folder",
-		Unit:   "B",
-		Type:   NumberBinary,
-	})
-
-	categories = append(categories, category{
-		Values: statsForInts(numDevices),
-		Descr:  "Number of Devices in Cluster",
-	})
-
-	categories = append(categories, category{
-		Values: statsForInts(numFolders),
-		Descr:  "Number of Folders Configured",
-	})
-
-	categories = append(categories, category{
-		Values: statsForInt64s(memoryUsage),
-		Descr:  "Memory Usage",
-		Unit:   "B",
-		Type:   NumberBinary,
-	})
-
-	categories = append(categories, category{
-		Values: statsForInt64s(memorySize),
-		Descr:  "System Memory",
-		Unit:   "B",
-		Type:   NumberBinary,
-	})
-
-	categories = append(categories, category{
-		Values: statsForFloats(sha256Perf),
-		Descr:  "SHA-256 Hashing Performance",
-		Unit:   "B/s",
-		Type:   NumberBinary,
-	})
-
-	categories = append(categories, category{
-		Values: statsForInts(numCPU),
-		Descr:  "Number of CPU cores",
-	})
-
-	categories = append(categories, category{
-		Values: statsForInts(uptime),
-		Descr:  "Uptime (v3)",
-		Type:   NumberDuration,
-	})
+	categories := []category{
+		{
+			Values: statsForInts(totFiles),
+			Descr:  "Files Managed per Device",
+		}, {
+			Values: statsForInts(maxFiles),
+			Descr:  "Files in Largest Folder",
+		}, {
+			Values: statsForInt64s(totMiB),
+			Descr:  "Data Managed per Device",
+			Unit:   "B",
+			Type:   NumberBinary,
+		}, {
+			Values: statsForInt64s(maxMiB),
+			Descr:  "Data in Largest Folder",
+			Unit:   "B",
+			Type:   NumberBinary,
+		}, {
+			Values: statsForInts(numDevices),
+			Descr:  "Number of Devices in Cluster",
+		}, {
+			Values: statsForInts(numFolders),
+			Descr:  "Number of Folders Configured",
+		}, {
+			Values: statsForInt64s(memoryUsage),
+			Descr:  "Memory Usage",
+			Unit:   "B",
+			Type:   NumberBinary,
+		}, {
+			Values: statsForInt64s(memorySize),
+			Descr:  "System Memory",
+			Unit:   "B",
+			Type:   NumberBinary,
+		}, {
+			Values: statsForFloats(sha256Perf),
+			Descr:  "SHA-256 Hashing Performance",
+			Unit:   "B/s",
+			Type:   NumberBinary,
+		}, {
+			Values: statsForInts(numCPU),
+			Descr:  "Number of CPU cores",
+		}, {
+			Values: statsForInts(uptime),
+			Descr:  "Uptime (v3)",
+			Type:   NumberDuration,
+		},
+	}
 
 	reportFeatures := make(map[string][]feature)
 	for featureType, versions := range features {
@@ -917,7 +894,7 @@ func getReport(db *sql.DB) map[string]interface{} {
 	r["distributions"] = analyticsFor(distributions, len(knownDistributions))
 	r["featureOrder"] = featureOrder
 	r["locations"] = locations
-	r["contries"] = countryList
+	r["countries"] = countryList
 
 	return r
 }
@@ -1041,7 +1018,7 @@ func (s *summary) filter(min int) {
 func getSummary(db *sql.DB, min int) (summary, error) {
 	s := newSummary()
 
-	rows, err := db.Query(`SELECT Day, Version, Count FROM VersionSummary WHERE Day > now() - '2 year'::INTERVAL;`)
+	rows, err := db.Query(`SELECT Day, Version, Count FROM VersionSummary WHERE Day > now() - '3 year'::INTERVAL;`)
 	if err != nil {
 		return summary{}, err
 	}
@@ -1074,7 +1051,7 @@ func getSummary(db *sql.DB, min int) (summary, error) {
 }
 
 func getMovement(db *sql.DB) ([][]interface{}, error) {
-	rows, err := db.Query(`SELECT Day, Added, Removed, Bounced FROM UserMovement WHERE Day > now() - '2 year'::INTERVAL ORDER BY Day`)
+	rows, err := db.Query(`SELECT Day, Added, Removed, Bounced FROM UserMovement WHERE Day > now() - '3 year'::INTERVAL ORDER BY Day`)
 	if err != nil {
 		return nil, err
 	}
@@ -1107,7 +1084,7 @@ func getMovement(db *sql.DB) ([][]interface{}, error) {
 }
 
 func getPerformance(db *sql.DB) ([][]interface{}, error) {
-	rows, err := db.Query(`SELECT Day, TotFiles, TotMiB, SHA256Perf, MemorySize, MemoryUsageMiB FROM Performance WHERE Day > '2014-06-20'::TIMESTAMP ORDER BY Day`)
+	rows, err := db.Query(`SELECT Day, TotFiles, TotMiB, SHA256Perf, MemorySize, MemoryUsageMiB FROM Performance WHERE Day > now() - '5 year'::INTERVAL ORDER BY Day`)
 	if err != nil {
 		return nil, err
 	}
@@ -1134,7 +1111,7 @@ func getPerformance(db *sql.DB) ([][]interface{}, error) {
 }
 
 func getBlockStats(db *sql.DB) ([][]interface{}, error) {
-	rows, err := db.Query(`SELECT Day, Reports, Pulled, Renamed, Reused, CopyOrigin, CopyOriginShifted, CopyElsewhere FROM BlockStats WHERE Day > '2017-10-23'::TIMESTAMP ORDER BY Day`)
+	rows, err := db.Query(`SELECT Day, Reports, Pulled, Renamed, Reused, CopyOrigin, CopyOriginShifted, CopyElsewhere FROM BlockStats WHERE Day > now() - '3 year'::INTERVAL ORDER BY Day`)
 	if err != nil {
 		return nil, err
 	}
@@ -1151,6 +1128,10 @@ func getBlockStats(db *sql.DB) ([][]interface{}, error) {
 		if err != nil {
 			return nil, err
 		}
+		// Legacy bad data on certain days
+		if reports <= 0 || pulled < 0 || renamed < 0 || reused < 0 || copyOrigin < 0 || copyOriginShifted < 0 || copyElsewhere < 0 {
+			continue
+		}
 		row := []interface{}{
 			day.Format("2006-01-02"),
 			reports,
@@ -1172,9 +1153,11 @@ type sortableFeatureList []feature
 func (l sortableFeatureList) Len() int {
 	return len(l)
 }
+
 func (l sortableFeatureList) Swap(a, b int) {
 	l[a], l[b] = l[b], l[a]
 }
+
 func (l sortableFeatureList) Less(a, b int) bool {
 	if l[a].Pct != l[b].Pct {
 		return l[a].Pct < l[b].Pct

cmd/ursrv/migration.go

@@ -1,143 +0,0 @@
-// Copyright (C) 2020 The Syncthing Authors.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at https://mozilla.org/MPL/2.0/.
-
-package main
-
-import (
-	"database/sql"
-	"database/sql/driver"
-	"encoding/json"
-	"errors"
-	"log"
-	"strings"
-
-	"github.com/lib/pq"
-
-	"github.com/syncthing/syncthing/lib/ur/contract"
-)
-
-func migrate(db *sql.DB) error {
-	var count uint64
-	log.Println("Checking old table row count, this might take a while...")
-	if err := db.QueryRow(`SELECT COUNT(1) FROM Reports`).Scan(&count); err != nil || count == 0 {
-		// err != nil most likely means table does not exist.
-		return nil
-	}
-	log.Printf("Found %d records, will perform migration.", count)
-
-	tx, err := db.Begin()
-	if err != nil {
-		log.Println("sql:", err)
-		return err
-	}
-	defer tx.Rollback()
-
-	// These must be lower case, because we don't quote them when creating, so postgres creates them lower case.
-	// Yet pg.CopyIn quotes them, which makes them case sensitive.
-	stmt, err := tx.Prepare(pq.CopyIn("reportsjson", "received", "report"))
-	if err != nil {
-		log.Println("sql:", err)
-		return err
-	}
-
-	// Custom types used in the old struct.
-	var rep contract.Report
-	var rescanIntvs pq.Int64Array
-	var fsWatcherDelay pq.Int64Array
-	pullOrder := make(IntMap)
-	fileSystemType := make(IntMap)
-	themes := make(IntMap)
-	transportStats := make(IntMap)
-
-	rows, err := db.Query(`SELECT ` + strings.Join(rep.FieldNames(), ", ") + `, FolderFsWatcherDelays, RescanIntvs, FolderPullOrder, FolderFilesystemType, GUITheme, Transport FROM Reports`)
-	if err != nil {
-		log.Println("sql:", err)
-		return err
-	}
-	defer rows.Close()
-
-	var done uint64
-	pct := count / 100
-
-	for rows.Next() {
-		err := rows.Scan(append(rep.FieldPointers(), &fsWatcherDelay, &rescanIntvs, &pullOrder, &fileSystemType, &themes, &transportStats)...)
-		if err != nil {
-			log.Println("sql scan:", err)
-			return err
-		}
-		// Patch up parts that used to use custom types
-		rep.RescanIntvs = make([]int, len(rescanIntvs))
-		for i := range rescanIntvs {
-			rep.RescanIntvs[i] = int(rescanIntvs[i])
-		}
-		rep.FolderUsesV3.FsWatcherDelays = make([]int, len(fsWatcherDelay))
-		for i := range fsWatcherDelay {
-			rep.FolderUsesV3.FsWatcherDelays[i] = int(fsWatcherDelay[i])
-		}
-		rep.FolderUsesV3.PullOrder = pullOrder
-		rep.FolderUsesV3.FilesystemType = fileSystemType
-		rep.GUIStats.Theme = themes
-		rep.TransportStats = transportStats
-
-		_, err = stmt.Exec(rep.Received, rep)
-		if err != nil {
-			log.Println("sql insert:", err)
-			return err
-		}
-		done++
-		if done%pct == 0 {
-			log.Printf("Migration progress %d/%d (%d%%)", done, count, (100*done)/count)
-		}
-	}
-
-	// Tell the driver bulk copy is finished
-	_, err = stmt.Exec()
-	if err != nil {
-		log.Println("sql stmt exec:", err)
-		return err
-	}
-
-	err = stmt.Close()
-	if err != nil {
-		log.Println("sql stmt close:", err)
-		return err
-	}
-
-	_, err = tx.Exec("DROP TABLE Reports")
-	if err != nil {
-		log.Println("sql drop:", err)
-		return err
-	}
-
-	err = tx.Commit()
-	if err != nil {
-		log.Println("sql commit:", err)
-		return err
-	}
-	return nil
-}
-
-type IntMap map[string]int
-
-func (p IntMap) Value() (driver.Value, error) {
-	return json.Marshal(p)
-}
-
-func (p *IntMap) Scan(src interface{}) error {
-	source, ok := src.([]byte)
-	if !ok {
-		return errors.New("Type assertion .([]byte) failed.")
-	}
-
-	var i map[string]int
-	err := json.Unmarshal(source, &i)
-	if err != nil {
-		return err
-	}
-
-	*p = i
-	return nil
-}

cmd/ursrv/static/index.html

@@ -50,7 +50,6 @@ found in the LICENSE file.
 
   <script type="text/javascript">
     google.setOnLoadCallback(drawVersionChart);
-    google.setOnLoadCallback(drawMovementChart);
     google.setOnLoadCallback(drawBlockStatsChart);
     google.setOnLoadCallback(drawPerformanceCharts);
 
@@ -82,37 +81,6 @@ found in the LICENSE file.
       chart.draw(data, options);
     }
 
-    function drawMovementChart() {
-      var jsonData = $.ajax({url: "movement.json", dataType:"json", async: false}).responseText;
-      var rows = JSON.parse(jsonData);
-
-      var data = new google.visualization.DataTable();
-      data.addColumn('date', 'Day');
-      for (var i = 1; i < rows[0].length; i++){
-        data.addColumn('number', rows[0][i]);
-      }
-
-      for (var i = 1; i < rows.length; i++){
-        rows[i][0] = new Date(rows[i][0]);
-        if (rows[i][1] > 500) {
-          rows[i][1] = null;
-        }
-        if (rows[i][2] < -500) {
-          rows[i][2] = null;
-        }
-        data.addRow(rows[i]);
-      };
-
-      var options = {
-        legend: { position: 'bottom', alignment: 'center' },
-        colors: ['rgb(102,194,165)','rgb(252,141,98)','rgb(141,160,203)','rgb(231,138,195)','rgb(166,216,84)','rgb(255,217,47)'],
-        chartArea: {left: 80, top: 20, width: '1020', height: '300'},
-      };
-
-      var chart = new google.visualization.AreaChart(document.getElementById('movementChart'));
-      chart.draw(data, options);
-    }
-
     function formatGibibytes(gibibytes, decimals) {
       if(gibibytes == 0) return '0 GiB';
       var k = 1024,
@@ -273,14 +241,6 @@ found in the LICENSE file.
         </p>
         <div class="img-thumbnail" id="versionChart" style="width: 1130px; height: 400px; padding: 10px;"></div>
 
-        <h4 id="joining-leaving">Users Joining and Leaving per Day</h4>
-        <p>
-          This is the total number of unique users joining and leaving per day. A user is counted as "joined" on first the day their unique ID is seen, and as "left" on the last day the unique ID was seen before a two weeks or longer absence. "Bounced" refers to users who joined and left on the same day.
-        </p>
-        <div class="img-thumbnail" id="movementChart" style="width: 1130px; height: 400px; padding: 10px;"></div>
-        <p class="text-muted">
-         Reappearance of users cause the "left" data to shrink retroactively.
-        </p>
         <div id="block-stats">
           <h4>Data Transfers per Day</h4>
           <p>
@@ -315,7 +275,7 @@ found in the LICENSE file.
                 <div class="col-md-6">
                   <table class="table table-striped">
                     <tbody>
-                      {{range .contries | slice 2 1}}
+                      {{range .countries | slice 2 1}}
                       <tr>
                         <td style="width: 45%">{{.Key}}</td>
                         <td style="width: 5%" class="text-right">{{if ge .Pct 10.0}}{{.Pct | printf "%.0f"}}{{else if ge .Pct 1.0}}{{.Pct | printf "%.01f"}}{{else}}{{.Pct | printf "%.02f"}}{{end}}%</td>
@@ -331,7 +291,7 @@ found in the LICENSE file.
                 <div class="col-md-6">
                   <table class="table table-striped">
                     <tbody>
-                      {{range .contries | slice 2 2}}
+                      {{range .countries | slice 2 2}}
                       <tr>
                         <td style="width: 45%">{{.Key}}</td>
                         <td style="width: 5%" class="text-right">{{if ge .Pct 10.0}}{{.Pct | printf "%.0f"}}{{else if ge .Pct 1.0}}{{.Pct | printf "%.01f"}}{{else}}{{.Pct | printf "%.02f"}}{{end}}%</td>

etc/freebsd-rc/README.md

@@ -13,4 +13,4 @@ syncthing_log_file=</path/to/syncthing/log/file>
 syncthing_user=<syncthing_user>
 syncthing_group=<syncthing_group>
 ```
-See the rc.d script for more informations.
+See the rc.d script for more information.

etc/linux-sysctl/30-syncthing.conf

@@ -1,3 +1,3 @@
 # Increase maximum receive socket buffer size to 2MiB for QUIC connections
-# see https://github.com/lucas-clemente/quic-go/wiki/UDP-Receive-Buffer-Size
+# see https://github.com/quic-go/quic-go/wiki/UDP-Receive-Buffer-Size
 net.core.rmem_max = 2097152

etc/linux-systemd/README.md

@@ -5,4 +5,4 @@ This directory contains configuration files for running Syncthing under the
 systemd user service. For further documentation take a look at the [systemd
 section][1] on https://docs.syncthing.net.
 
-[1]: https://docs.syncthing.net/users/autostart.html#using-systemd
+[1]: https://docs.syncthing.net/users/autostart#using-systemd

etc/linux-systemd/system/syncthing@.service

@@ -2,14 +2,14 @@
 Description=Syncthing - Open Source Continuous File Synchronization for %I
 Documentation=man:syncthing(1)
 After=network.target
+StartLimitIntervalSec=60
+StartLimitBurst=4
 
 [Service]
 User=%i
 ExecStart=/usr/bin/syncthing serve --no-browser --no-restart --logflags=0
 Restart=on-failure
 RestartSec=1
-StartLimitIntervalSec=60
-StartLimitBurst=4
 SuccessExitStatus=3 4
 RestartForceExitStatus=3 4
 
@@ -20,5 +20,9 @@ SystemCallArchitectures=native
 MemoryDenyWriteExecute=true
 NoNewPrivileges=true
 
+# Elevated permissions to sync ownership (disabled by default),
+# see https://docs.syncthing.net/advanced/folder-sync-ownership
+#AmbientCapabilities=CAP_CHOWN CAP_FOWNER
+
 [Install]
 WantedBy=multi-user.target

etc/linux-systemd/user/syncthing.service

@@ -1,13 +1,13 @@
 [Unit]
 Description=Syncthing - Open Source Continuous File Synchronization
 Documentation=man:syncthing(1)
+StartLimitIntervalSec=60
+StartLimitBurst=4
 
 [Service]
 ExecStart=/usr/bin/syncthing serve --no-browser --no-restart --logflags=0
 Restart=on-failure
 RestartSec=1
-StartLimitIntervalSec=60
-StartLimitBurst=4
 SuccessExitStatus=3 4
 RestartForceExitStatus=3 4
 
@@ -16,5 +16,9 @@ SystemCallArchitectures=native
 MemoryDenyWriteExecute=true
 NoNewPrivileges=true
 
+# Elevated permissions to sync ownership (disabled by default),
+# see https://docs.syncthing.net/advanced/folder-sync-ownership
+#AmbientCapabilities=CAP_CHOWN CAP_FOWNER
+
 [Install]
 WantedBy=default.target

go.mod

@@ -1,57 +1,83 @@
 module github.com/syncthing/syncthing
 
+go 1.19
+
 require (
-	github.com/AudriusButkevicius/pfilter v0.0.0-20210218141631-7468b85d810a
-	github.com/AudriusButkevicius/recli v0.0.5
-	github.com/alecthomas/kong v0.2.12
-	github.com/bkaradzic/go-lz4 v0.0.0-20160924222819-7224d8d8f27e
+	github.com/AudriusButkevicius/pfilter v0.0.11
+	github.com/AudriusButkevicius/recli v0.0.7-0.20220911121932-d000ce8fbf0f
+	github.com/alecthomas/kong v0.7.1
+	github.com/calmh/incontainer v0.0.0-20221224152218-b3e71b103d7a
 	github.com/calmh/xdr v1.1.0
-	github.com/ccding/go-stun v0.1.2
-	github.com/certifi/gocertifi v0.0.0-20200922220541-2c3bb06c6054 // indirect
-	github.com/chmduquesne/rollinghash v0.0.0-20180912150627-a60f8e7142b5
+	github.com/ccding/go-stun v0.1.4
+	github.com/certifi/gocertifi v0.0.0-20210507211836-431795d63e8d // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/chmduquesne/rollinghash v4.0.0+incompatible
+	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
 	github.com/d4l3k/messagediff v1.2.1
-	github.com/dchest/siphash v1.2.2
 	github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568
 	github.com/getsentry/raven-go v0.2.0
-	github.com/go-ldap/ldap/v3 v3.2.4
+	github.com/go-asn1-ber/asn1-ber v1.5.4 // indirect
+	github.com/go-ldap/ldap/v3 v3.4.4
 	github.com/gobwas/glob v0.2.3
-	github.com/gogo/protobuf v1.3.1
-	github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e
-	github.com/golang/protobuf v1.4.3
-	github.com/greatroar/blobloom v0.5.0
-	github.com/hashicorp/golang-lru v0.5.1
-	github.com/jackpal/gateway v1.0.6
+	github.com/gogo/protobuf v1.3.2
+	github.com/golang/snappy v0.0.4 // indirect
+	github.com/greatroar/blobloom v0.7.2
+	github.com/hashicorp/golang-lru/v2 v2.0.2
+	github.com/jackpal/gateway v1.0.10
 	github.com/jackpal/go-nat-pmp v1.0.2
 	github.com/julienschmidt/httprouter v1.3.0
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
-	github.com/lib/pq v1.8.0
-	github.com/lucas-clemente/quic-go v0.19.3
-	github.com/maruel/panicparse v1.5.1
-	github.com/mattn/go-isatty v0.0.12
-	github.com/maxbrunsfeld/counterfeiter/v6 v6.3.0 // indirect
-	github.com/minio/sha256-simd v0.1.1
+	github.com/klauspost/cpuid/v2 v2.2.4 // indirect
+	github.com/lib/pq v1.10.7
+	github.com/maruel/panicparse/v2 v2.3.1
+	github.com/maxbrunsfeld/counterfeiter/v6 v6.5.0
+	github.com/minio/sha256-simd v1.0.0
 	github.com/miscreant/miscreant.go v0.0.0-20200214223636-26d376326b75
-	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
-	github.com/onsi/gomega v1.10.3 // indirect
-	github.com/oschwald/geoip2-golang v1.4.0
-	github.com/petermattis/goid v0.0.0-20180202154549-b0b1615b78e5 // indirect
-	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.8.0
-	github.com/rcrowley/go-metrics v0.0.0-20200313005456-10cdbea86bc0
-	github.com/sasha-s/go-deadlock v0.2.0
-	github.com/shirou/gopsutil/v3 v3.20.11
-	github.com/syncthing/notify v0.0.0-20210308121556-f45149b04939
-	github.com/syndtr/goleveldb v1.0.1-0.20200815071216-d9e9293bd0f7
-	github.com/thejerf/suture/v4 v4.0.0
-	github.com/urfave/cli v1.22.4
+	github.com/oschwald/geoip2-golang v1.8.0
+	github.com/pierrec/lz4/v4 v4.1.17
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/prometheus/client_golang v1.14.0
+	github.com/prometheus/common v0.42.0 // indirect
+	github.com/prometheus/procfs v0.9.0 // indirect
+	github.com/quic-go/quic-go v0.34.0
+	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475
+	github.com/sasha-s/go-deadlock v0.3.1
+	github.com/shirou/gopsutil/v3 v3.23.3
+	github.com/syncthing/notify v0.0.0-20210616190510-c6b7342338d2
+	github.com/syndtr/goleveldb v1.0.1-0.20220721030215-126854af5e6d
+	github.com/thejerf/suture/v4 v4.0.2
+	github.com/urfave/cli v1.22.12
 	github.com/vitrun/qart v0.0.0-20160531060029-bf64b92db6b0
-	golang.org/x/crypto v0.0.0-20201016220609-9e8e0b390897
-	golang.org/x/net v0.0.0-20201031054903-ff519b6c9102
-	golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4
-	golang.org/x/text v0.3.4
-	golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e
-	golang.org/x/tools v0.1.0 // indirect
-	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
+	golang.org/x/crypto v0.8.0
+	golang.org/x/mod v0.10.0 // indirect
+	golang.org/x/net v0.9.0
+	golang.org/x/sys v0.7.0
+	golang.org/x/text v0.9.0
+	golang.org/x/time v0.3.0
+	golang.org/x/tools v0.8.0
+	google.golang.org/protobuf v1.30.0
 )
 
-go 1.14
+require (
+	github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/go-ole/go-ole v1.2.6 // indirect
+	github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 // indirect
+	github.com/golang/mock v1.6.0 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/pprof v0.0.0-20230406165453-00490a63f317 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/onsi/ginkgo/v2 v2.9.2 // indirect
+	github.com/oschwald/maxminddb-golang v1.10.0 // indirect
+	github.com/petermattis/goid v0.0.0-20230317030725-371a4b8eda08 // indirect
+	github.com/power-devops/perfstat v0.0.0-20221212215047-62379fc7944b // indirect
+	github.com/prometheus/client_model v0.3.0 // indirect
+	github.com/quic-go/qtls-go1-19 v0.3.2 // indirect
+	github.com/quic-go/qtls-go1-20 v0.2.2 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/yusufpapurcu/wmi v1.2.2 // indirect
+	golang.org/x/exp v0.0.0-20230321023759-10a507213a29 // indirect
+)
+
+// https://github.com/gobwas/glob/pull/55
+replace github.com/gobwas/glob v0.2.3 => github.com/calmh/glob v0.0.0-20220615080505-1d823af5017b

go.sum

@@ -1,674 +1,314 @@
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-dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0/go.mod h1:JLBrvjyP0v+ecvNYvCpyZgu5/xkfAUhi6wJj28eUfSU=
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-google.golang.org/grpc v1.22.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
-google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
-google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
-google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+golang.org/x/xerrors v0.0.0-20220517211312-f3a8303e98df/go.mod h1:K8+ghG5WaK9qNqU5K3HdILfMLy1f3aNYFI/wnl100a8=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
 google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
-google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
+google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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-gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
-gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
-gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
-gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
-gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
-gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
-gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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-honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
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-rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
-rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
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+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
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gui/black/assets/css/theme.css

@@ -42,7 +42,7 @@ a:hover,a:focus,a.focus{
 .nav-tabs > li > a:hover,
 .nav-tabs > li > a:focus {
   background-color: #222222 !important;
-  border: none !important;
+  border-color: transparent !important;
 }
 
 .navbar-text, .dropdown>a, .dropdown-menu>li>a, .hidden-xs>a, .navbar-link {
@@ -265,6 +265,16 @@ code.ng-binding{
     color: #222;
 }
 
-.fancytree-title {
-    color: #aaa !important;
+/*
+ * Fancytree tweaks
+ */
+
+.fancytree-container tr:hover,
+.fancytree-focused {
+    background-color: #222;
+}
+
+/* Remote Devices 'connection type'-icon color set to #aaa */
+.reception {
+    filter: invert(77%) sepia(0%) saturate(724%) hue-rotate(146deg) brightness(91%) contrast(85%);
 }

gui/dark/assets/css/theme.css

@@ -45,7 +45,7 @@ a:hover,a:focus,a.focus{
 .nav-tabs > li > a:hover,
 .nav-tabs > li > a:focus {
   background-color: #424242 !important;
-  border: none !important;
+  border-color: transparent !important;
 }
 
 
@@ -277,6 +277,16 @@ code.ng-binding{
     color: #3fa9f0;
 }
 
-.fancytree-title {
-    color: #aaa !important;
+/*
+ * Fancytree tweaks
+ */
+
+.fancytree-container tr:hover,
+.fancytree-focused {
+    background-color: #424242;
 }
+
+/* Remote Devices 'connection type'-icon color set to #aaa */
+.reception {
+    filter: invert(77%) sepia(0%) saturate(724%) hue-rotate(146deg) brightness(91%) contrast(85%);
+}

gui/default/assets/css/overrides.css

@@ -10,6 +10,7 @@
 body {
     padding-bottom: 70px;
     font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
+    overflow-y: scroll;
 }
 
 h1, h2, h3, h4, h5 {
@@ -143,8 +144,48 @@ table.table-auto td {
     max-width: 0px;
 }
 
+td input[type="checkbox"] {
+    margin-top: 13px;
+}
+
+/* Remote Devices connection-quality indicator */
+.reception-0 {
+    background: url('../../vendor/bootstrap/fonts/reception-0.svg') no-repeat;
+}
+
+.reception-1 {
+    background: url('../../vendor/bootstrap/fonts/reception-1.svg') no-repeat;
+}
+
+.reception-2 {
+    background: url('../../vendor/bootstrap/fonts/reception-2.svg') no-repeat;
+}
+
+.reception-3 {
+    background: url('../../vendor/bootstrap/fonts/reception-3.svg') no-repeat;
+}
+
+.reception-4 {
+    background: url('../../vendor/bootstrap/fonts/reception-4.svg') no-repeat;
+}
+
+.reception {
+    width: 1em;
+    height: 1em;
+    display: inline-block;
+    vertical-align: -10%;
+    background-size: contain;
+    /* Simulate same width as Fork Awesome icons. */
+    margin-left: .14285715em;
+    margin-right: .14285715em;
+}
+
+.remote-devices-panel {
+    display: inline-block;
+}
+
 /* Wrap long file paths to prevent text overflow. See issue #6268. */
-.file-path {
+.word-break-all {
     word-break: break-all;
 }
 
@@ -166,16 +207,13 @@ table.table-auto td {
     display: none;
 }
 
-*[language-select] > .dropdown-menu {
+li[language-select] > .dropdown-menu {
+    column-count: 2;
+    column-gap: 0;
     width: 450px;
 }
 
-*[language-select] > .dropdown-menu > li {
-    float: left;
-    width: 50%;
-}
-
-*[language-select] > .dropdown-menu > li > a {
+li[language-select] > .dropdown-menu > li > a {
     overflow: hidden;
     text-overflow: ellipsis;
 }
@@ -304,6 +342,62 @@ ul.three-columns li, ul.two-columns li {
     z-index: 980;
 }
 
+/*
+ * Restore Versions tweaks
+ */
+
+#restoreTree-container {
+    overflow-y: scroll;
+    resize: vertical;
+    /* Limit height to prevent vertical screen overflow. */
+    max-height: calc(100vh - 390px);
+    /* Always fit at least one folder with dropdown open. */
+    min-height: 136px;
+}
+@media (min-width: 768px) {
+    #restoreTree-container {
+        max-height: calc(100vh - 401px);
+    }
+}
+@media (min-width: 992px) {
+    #restoreTree-container {
+        max-height: calc(100vh - 333px);
+    }
+}
+
+/* Ignore fixed height when manually resized. */
+#restoreTree-container[style*="height"] {
+    max-height: none;
+}
+
+/* Remove table outline as rows have own focus style already. */
+#restoreTree:focus {
+    outline: 0;
+}
+
+/* Align dropdown with title first line. */
+#restoreTree td + td {
+    padding-top: 4px;
+    vertical-align: top;
+}
+
+/* Reduce space between toggle and menu on mobile. */
+#restoreTree .dropdown-toggle {
+    margin-bottom: 0;
+}
+
+/* Change direction to remain on screen on mobile. */
+#restoreTree .dropdown-menu {
+    left: auto;
+    right: 0;
+}
+
+/* Ensure maximum space for filtering and date range. */
+#restoreVersions .form-group,
+#restoreVersions .form-control {
+    width: 100%;
+}
+
 /** Footer nav on small devices **/
 @media (max-width: 1199px) {
     /* Stay at the end of the page, with space reserved for the footer
@@ -351,24 +445,19 @@ ul.three-columns li, ul.two-columns li {
         border-radius: 2px;
     }
 
-    *[language-select] {
+    li[language-select] {
         position: static !important;
     }
 
-    *[language-select] > .dropdown-menu {
+    li[language-select] > .dropdown-menu {
+        column-count: auto;
         margin-left: 15px;
         margin-right: 15px;
         margin-top: -12px !important;
         max-width: 450px;
-        height: 265px;
         overflow-y: scroll;
-    }
-
-    table.table-condensed td,
-    table.table-condensed th {
-        /* for mobile phones to allow linebreaks in long repro folder/shared with
-        * columns. */
-        white-space: normal;
+        /* height of 5.5 elements + negative margin-top */
+        height: 276px;
     }
 
     .two-columns {
@@ -397,10 +486,6 @@ ul.three-columns li, ul.two-columns li {
     padding-top: 10px;
 }
 
-.fancytree-ext-table {
-    width: 100% !important;
-}
-
 @media (max-width: 419px) {
     /* the selectors are build to target only the content of folder and device
        panels as it would "destroy" e.g. out of sync or recent changes listings */
@@ -421,12 +506,32 @@ ul.three-columns li, ul.two-columns li {
         width: 100%;
     }
 
-    /* all buttons, except panel headings, get bottom margin, as they won't fit
-       beside each other anymore */
+    /* All buttons, except panel headings, get bottom margin, as they
+       won't fit beside each other anymore. Reduce footer padding to
+       compensate for the margin. */
     .btn:not(.panel-heading),
-    /* this "+"-selector is needed to override some bootstrap defaults */
     .btn:not(.panel-heading) + .btn:not(.panel-heading) {
-        margin-bottom: 1rem;
+        margin-bottom: 10px;
+    }
+    .panel-footer {
+        padding-bottom: 0;
+    }
+    .modal-footer {
+        padding-bottom: 5px;
+    }
+
+    table.table-auto td,
+    table.table-auto th,
+    table.table-condensed td,
+    table.table-condensed th {
+        /* for mobile phones to allow linebreaks in long repro folder/shared with
+        * columns. */
+        white-space: normal;
+    }
+
+    /* Move share buttons below device ID on small screens. */
+    #shareDeviceIdButtons {
+        display: inline-block;
     }
 }
 
@@ -443,3 +548,28 @@ ul.three-columns li, ul.two-columns li {
     background-color: #eeeeee;
     opacity: 1;
 }
+
+/* Make a "well" look more like a readonly text input when grouped with a button */
+.input-group .well-sm {
+  padding-top: 6px;
+  padding-bottom: 6px;
+}
+
+/* CJK languages don't use italic at all, hence don't force it on them. */
+html[lang|="zh"] i,
+html[lang="ja"] i,
+html[lang|="ko"] i {
+    font-style: normal;
+}
+
+/* Prevent buttons from jumping up and down
+   when a tooltip is shown for one of them. */
+.btn-group-vertical > .tooltip + .btn,
+.btn-group-vertical > .tooltip + .btn-group {
+    margin-top: -1px;
+}
+
+.select-on-click {
+    -webkit-user-select: all;
+    user-select: all;
+}

gui/default/assets/css/tree.css

@@ -0,0 +1,58 @@
+/*
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+*/
+
+.fancytree-container {
+    cursor: pointer;
+    width: 100%;
+}
+
+.fancytree-hide {
+    visibility: collapse;
+}
+
+/* Node needs to be block, and expander, icon and title
+   inline-block to properly wrap unbreakable text. */
+.fancytree-node {
+    display: block;
+    white-space: nowrap;
+    /* expander 16px + icon 16px + title padding 8px */
+    padding-right: 40px;
+}
+.fancytree-expander,
+.fancytree-icon,
+.fancytree-title {
+    display: inline-block;
+}
+
+.fancytree-expander,
+.fancytree-icon {
+    margin-top: 4px;
+    vertical-align: top;
+    width: 16px;
+}
+
+.fancytree-childcounter {
+    background: #777;
+    border-radius: 10px;
+    border: 1px solid gray;
+    color: #fff;
+    font-size: 13px;
+    opacity: .75;
+    padding: 2px 3px;
+    position: relative;
+    right: 8px;
+    top: -9px;
+    user-select: none;
+}
+
+.fancytree-title {
+    padding-left: 8px;
+    white-space: normal;
+    word-break: break-all;
+}

gui/default/assets/lang/README.txt

@@ -1,7 +1,7 @@
 All files in this directory are auto generated. Do not change any of
 them. To contribute translations, please head over to
 
- https://www.transifex.com/projects/p/syncthing/
+ https://hosted.weblate.org/projects/syncthing/
 
-Any updates made on Transifex will be automatically pulled into these
+Any updates made on Weblate will be automatically pulled into these
 files.

gui/default/assets/lang/lang-ar.json

@@ -0,0 +1,345 @@
+{
+    "A device with that ID is already added.": "تم أضافه عنوان هذا الجهاز من قبل.",
+    "A negative number of days doesn't make sense.": "لا يمكن استخدام قيمة سالبة لعدد الأيام.",
+    "A new major version may not be compatible with previous versions.": "الإصدار الجديد قد لا يتوافق مع الإصدارات السابقة.",
+    "API Key": "مفتاح API",
+    "About": "حول",
+    "Action": "اجراء",
+    "Actions": "الإجراءات",
+    "Active filter rules": "قواعد التصفية النشطة",
+    "Add": "إضافة",
+    "Add Device": "إضافة جهاز",
+    "Add Folder": "إضافة مجلد",
+    "Add Remote Device": "أضافه جهاز بعيد",
+    "Add devices from the introducer to our device list, for mutually shared folders.": "اضف أجهزة من المعرف/المقدم إلى قائمة الأجهزة الخاصة بنا، للمجلدات المشتركة بشكل متبادل.",
+    "Add filter entry": "إضافة عامل التصفية",
+    "Add ignore patterns": "أضف أنماط التجاهل",
+    "Add new folder?": "إضافة مجلد جديد؟",
+    "Additionally the full rescan interval will be increased (times 60, i.e. new default of 1h). You can also configure it manually for every folder later after choosing No.": "بالإضافة إلى ذلك ، سيتم زيادة الفاصل الزمني لإعادة الفحص الكامل (60 مرة، وهو الافتراضي الجديد من 1H). يمكنك أيضًا التحكم بالإعدادات وتعديلها يدويًا لكل مجلد لاحقًا بعد اختيار \"لا\".",
+    "Address": "العنوان",
+    "Addresses": "العناوين",
+    "Advanced": "متقدم",
+    "Advanced Configuration": "ضبط متقدم",
+    "All Data": "كل المعلومات",
+    "All Time": "كل الوقت",
+    "All folders shared with this device must be protected by a password, such that all sent data is unreadable without the given password.": "يجب حماية جميع المجلدات التي تمت مشاركتها مع هذا الجهاز بكلمة مرور ، بحيث تكون جميع البيانات المرسلة غير قابلة للقراءة بدون كلمة المرور المقدمة.",
+    "Allow Anonymous Usage Reporting?": "السماح بإرسال تقارير الإستخدام المجهولة؟",
+    "Allowed Networks": "الشبكات المسموح بها",
+    "Alphabetic": "أبجدية",
+    "Altered by ignoring deletes.": "تم التغيير بتجاهل عمليات الحذف.",
+    "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "الإصدار يتم معالجته بواسطة أمر خارجي. يجب إزالة الملف من المجلدات المشتركة. إذا كان المسار للتطبيق يحتوي على مسافات، يجب وضعها بين علامتي تنصيص دلالة على الاقتباس.",
+    "Anonymous Usage Reporting": "تقارير الإستخدام المجهولة",
+    "Anonymous usage report format has changed. Would you like to move to the new format?": "هل تريد الانتقال الى التصميم الجديد لتقرير الاستخدام المجهول ؟",
+    "Apply": "تقدم",
+    "Are you sure you want to override all remote changes?": "هل أنت متأكد أنك تريد تجاوز كافة التغييرات عن بُعد؟",
+    "Are you sure you want to permanently delete all these files?": "هل أنت متأكد أنك تريد حذف كل هذه الملفات بشكل دائم؟",
+    "Are you sure you want to remove device {%name%}?": " هل انت متاكد من حذف الجهاز {{name}}? ",
+    "Are you sure you want to remove folder {%label%}?": "هل انت متاكد من حذف المجلد {{label}}؟",
+    "Are you sure you want to restore {%count%} files?": "هل انت متاكد من استعادة {{count}} ملف؟",
+    "Are you sure you want to revert all local changes?": "هل أنت متأكد أنك تريد التراجع عن كافة التغييرات المحلية؟",
+    "Are you sure you want to upgrade?": "هل أنت متأكد أنك تريد الترقية؟",
+    "Authors": "المؤلفون",
+    "Auto Accept": "القبول تلقائيا",
+    "Automatic Crash Reporting": "التبليغ التلقائي للاخطاء",
+    "Automatic upgrade now offers the choice between stable releases and release candidates.": "توفر الترقية التلقائية الاختيار بين النسخ الثابتة أو النسخ المرشحة.",
+    "Automatic upgrades": "تحديث تلقائي",
+    "Automatic upgrades are always enabled for candidate releases.": "الترقية التلقائية مفعلة دائمًا للنسخ المرشحة. ",
+    "Automatically create or share folders that this device advertises at the default path.": "تلقائيا أنشئ وشارك المجلدات الموجودة في المسار الافتراضي.",
+    "Available debug logging facilities:": "خدمات سجلات تدقيق البرمجيات المتوفرة:",
+    "Be careful!": "احذر!",
+    "Body:": "جسم:",
+    "Bugs": "أخطاء برمجية",
+    "Cancel": "إلغاء",
+    "Changelog": "سجل التغيير",
+    "Clean out after": "نظف بعد",
+    "Cleanup Interval": "الفاصل الزمني للتنظيف",
+    "Click to see full identification string and QR code.": "انقر لرؤية سلسلة التعريف الكاملة ورمز الاستجابة السريعة QR.",
+    "Close": "أغلق",
+    "Command": "أمر",
+    "Comment, when used at the start of a line": "التعليق، عندما تستخدم في بداية خط",
+    "Compression": "ضغط",
+    "Configuration Directory": "دليل التكوين",
+    "Configuration File": "ملف الضبط",
+    "Configured": "تكوين",
+    "Connected (Unused)": "متصل (غير مستخدم)",
+    "Connection Error": "خطأ في الإتصال",
+    "Connection Type": "نوع الاتصال",
+    "Connections": "اتصالات",
+    "Continuously watching for changes is now available within Syncthing. This will detect changes on disk and issue a scan on only the modified paths. The benefits are that changes are propagated quicker and that less full scans are required.": "مراقبة الملفات بشكل مستمر متوفر في Syncthing. يتم فحص الملفات التي تم تغييرها في المسار فقط. هذا يساعد على تجنب فحص كامل المسار لأداء اسرع. ",
+    "Copied from elsewhere": "منسوخ من مكان أخر",
+    "Copied from original": "منسوخ من الأصل",
+    "Copied!": "تم النسخ",
+    "Copy": "نسخ",
+    "Copy failed! Try to select and copy manually.": "فشل النسخ! حاول التحديد والنسخ يدويًا.",
+    "Currently Shared With Devices": "حاليًا تم مشاركته مع الأجهزة",
+    "Custom Range": "نطاق مخصص",
+    "Danger!": "خطر!",
+    "Database Location": "موقع قاعدة البيانات",
+    "Debugging Facilities": "خدمات تدقيق البرمجيات",
+    "Default": "أفتراضي",
+    "Default Configuration": "اعدادات افتراضية",
+    "Default Device": "الجهاز الافتراضي",
+    "Default Folder": "المجلد الافتراضي",
+    "Default Ignore Patterns": "أنماط التجاهل الافتراضية",
+    "Defaults": "الافتراضات",
+    "Delete": "حذف",
+    "Deselect All": "الغاء تحديد الكل",
+    "Device": "جهاز",
+    "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "الجهاز \"{{الاسم}}\" ({{الجهاز}} في {{العنوان}}) يرغب في الاتصال، إضافة جهاز جديد؟",
+    "Device ID": "هوية الجهاز",
+    "Device Identification": "هوية الجهاز",
+    "Device Name": "أسم الجهاز",
+    "Device rate limits": "حدود معدل نقل البيانات",
+    "Device that last modified the item": "اخر جهاز جهاز عدل على العنصر",
+    "Devices": "الأجهزة",
+    "Disable Crash Reporting": "تعطيل ميزة التبليغ عن الأخطاء",
+    "Disabled": "معطل",
+    "Disabled periodic scanning and disabled watching for changes": "تعطيل المسح الدوري ومشاهدة التغييرات",
+    "Disabled periodic scanning and enabled watching for changes": "تعطيل المسح الدوري وتفعيل مشاهدة التغييرات",
+    "Disabled periodic scanning and failed setting up watching for changes, retrying every 1m:": "تعطيل المسح الدوري وفشل إعداد مشاهدة التغييرات، إعادة المحاولة كل 1 دقيقة:",
+    "Discard": "تجاهل",
+    "Disconnected": "غير متصل",
+    "Discovered": "مكتشفة",
+    "Discovery": "اكتشاف",
+    "Discovery Failures": "فشل الاكتشاف",
+    "Do not restore": "الغاء الاستعادة",
+    "Do not restore all": "الغاء استعادة الكل",
+    "Do you want to enable watching for changes for all your folders?": "هل تريد تفعيل مراقبة التغيرات على كل المجلدات؟",
+    "Documentation": "المستندات",
+    "Download Rate": "معدل التحميل",
+    "Downloaded": "جاري التحميل",
+    "Downloading": "جاري التحميل",
+    "Edit": "تعديل",
+    "Edit Device": "تعديل الجهاز",
+    "Edit Folder": "تعديل المجلد",
+    "Editing {%path%}.": "تعديل {{path}}.",
+    "Enable Crash Reporting": "تفعيل التبليغ عن الاخطاء",
+    "Enable NAT traversal": "تفعيل اجتياز النات",
+    "Enable Relaying": "تفعيل الترحيل",
+    "Enabled": "مفعل",
+    "Enter a non-negative number (e.g., \"2.35\") and select a unit. Percentages are as part of the total disk size.": "أدخل رقمًا غير سالب (مثلًا، \"2.35\") واختر وحدة. النسب المئوية هي جزء من إجمالي حجم القرص.",
+    "Enter a non-privileged port number (1024 - 65535).": "ادخل رقم منفذ غير مقيد (1024 - 65535).",
+    "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "أدخل فواصل لكي تفصل بين العناوين (\"tcp://ip:port\", \"tcp://host:port\") أو \"العناوين الديناميكية\" للاكتشاف التلقائي للعنوان.",
+    "Enter ignore patterns, one per line.": "ادخل نمط التجاهل، كل نمط في سطر.",
+    "Error": "خطأ",
+    "External File Versioning": "إصدار الملف الخارجي",
+    "Failed Items": "العناصر الفاشلة",
+    "Failed to setup, retrying": "فشل الأعداد، جاري المحاولة مره اخرى",
+    "Failure to connect to IPv6 servers is expected if there is no IPv6 connectivity.": "من المتوقع فشل الاتصال بخوادم IPv6 إذا لم يكن هناك اتصال IPv6.",
+    "File Pull Order": "ترتيب ملف السحب",
+    "File Versioning": "ملف الإصدارات",
+    "Files are moved to .stversions directory when replaced or deleted by Syncthing.": "الملفات يتم نقلها إلى دليل .stversions عند الاستبدال أو الحذف بواسطة البرنامج.",
+    "Files are moved to date stamped versions in a .stversions directory when replaced or deleted by Syncthing.": "يتم نقل الملفات إلى الإصدارات المؤرخة المختومة في دليل .vversions عند استبدالها أو حذفها بواسطة Syncthing.",
+    "Files are protected from changes made on other devices, but changes made on this device will be sent to the rest of the cluster.": "الملفات محمية من التغييرات التي تم إجراؤها على الأجهزة الأخرى ، ولكن سيتم إرسال التغييرات التي تم إجراؤها على هذا الجهاز إلى بقية الأجهزة.",
+    "Filesystem Watcher Errors": "أخطاء مراقب نظام الملفات",
+    "Filter by date": "فلتره بالتاريخ ",
+    "Filter by name": "فلتر باستخدام الاسم",
+    "Folder": "مجلد",
+    "Folder ID": "هوية المجلد",
+    "Folder Label": "تسمية المجلد",
+    "Folder Path": "مسار المجلد",
+    "Folder Type": "نوع المجلد",
+    "Folders": "المجلدات",
+    "For the following folders an error occurred while starting to watch for changes. It will be retried every minute, so the errors might go away soon. If they persist, try to fix the underlying issue and ask for help if you can't.": "للمجلدات التالية، حدث خطأ قبل بدء مشاهدة التغييرات. ستتم إعادة المحاولة كل دقيقة، نظرًا لذلك قد تختفي الأخطاء قريبًا. لكن إذا استمرت، فحاول حل المشكلة واطلب المساعدة إذا لم تستطع حل المشكلة.",
+    "Full Rescan Interval (s)": "مدة أعاده الفحص الكامل (ثانية)",
+    "GUI": "واجهة المستخدم الرسومية",
+    "GUI Authentication Password": "كلمة الس",
+    "GUI Authentication User": "أسم المستخدم لدخول واجهة الرسومية",
+    "GUI Listen Address": "واجهة الرسومية الاستماع الى العنوان",
+    "GUI Theme": "شكل الواجه",
+    "General": "عام",
+    "Generate": "توليد",
+    "Global Discovery": "الاكتشاف العالمي",
+    "Global Discovery Servers": "الاكتشاف العالمي",
+    "Global State": "الحالة العامة ",
+    "Help": "مساعدة",
+    "Home page": "الصفحة الرئيسية",
+    "However, your current settings indicate you might not want it enabled. We have disabled automatic crash reporting for you.": "ومع ذلك، تشير إعداداتك الحالية إلى أنك قد لا ترغب في تمكينه. لذلك تم تعطيل الإبلاغ التلقائي عن الأعطال.",
+    "Ignore": "تجاهل",
+    "Ignore Patterns": "تجاهل الأنماط",
+    "Ignore Permissions": "تجاهل الصلاحيات",
+    "Ignored Devices": "الأجهزة المتجاهلة",
+    "Ignored Folders": "المجلدات المتجاهلة",
+    "Ignored at": "تجاهل عند",
+    "Incoming Rate Limit (KiB/s)": "الحد الأقصى البيانات الواردة (KiB/s)",
+    "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "الإعدادات الغير صحيحه قد تدمر بيانات المجلد وتجعل المزامنة غير صالحه للعمل",
+    "Introduced By": "عرف بواسطة",
+    "Introducer": "المعرف",
+    "Keep Versions": "احتفظ بالاصدارات",
+    "LDAP": "LDAP",
+    "Largest First": "الأكبر أولا",
+    "Last Scan": "اخر فحص",
+    "Last seen": "اخر ظهور",
+    "Latest Change": "اخر التغييرات",
+    "Learn more": "اعرف اكثر ",
+    "Limit": "الحد",
+    "Listeners": "المستمعين",
+    "Loading data...": "تحميل بيانات...",
+    "Loading...": "تحميل...",
+    "Local Discovery": "الاكتشاف المحلي",
+    "Local State": "الحالة المحلية",
+    "Local State (Total)": "الحالة المحلية (مجموع)",
+    "Locally Changed Items": "العناصر المتغيرة محليا",
+    "Log": "سجل",
+    "Logs": "سجلات",
+    "Major Upgrade": "ترقية أساسية",
+    "Maximum Age": "أقصى مدة",
+    "Metadata Only": "البيانات الوصفية فقط",
+    "Minimum Free Disk Space": "أدنى حد لمساحة التخزين الحرة",
+    "Move to top of queue": "الانتقال لأعلى قائمة الانتظار",
+    "Never": "أبدا",
+    "New Device": "جهاز جديد",
+    "New Folder": "مجلد جديد",
+    "Newest First": "الأحدث أولا",
+    "No": "لا",
+    "No files will be deleted as a result of this operation.": "لن يتم حذف اي ملفات بسبب هذا العملية",
+    "No upgrades": "لا يوجد ترقيات",
+    "Notice": "ملاحظة",
+    "OK": "موافق",
+    "Off": "اطفئ",
+    "Oldest First": "الأقدم أولا",
+    "Optional descriptive label for the folder. Can be different on each device.": "تسمية وصفية اختيارية للمجلد . يمكن أن تكون مختلفة على كل جهاز. ",
+    "Options": "خيارات",
+    "Out of Sync": "خارج التزامن",
+    "Out of Sync Items": "عناصر خارج التزامن",
+    "Override Changes": "تخطي التغييرات",
+    "Path": "مسار",
+    "Path where versions should be stored (leave empty for the default .stversions directory in the shared folder).": "المسار حيث تخزن الإصدارات (يترك فارغًا لدليل .vversions الافتراضي في المجلد المشترك).",
+    "Pause": "إيقاف",
+    "Pause All": "أيقاف الكل ",
+    "Paused": "توقف",
+    "Pending changes": "التغييرات المعلقة",
+    "Periodic scanning at given interval and disabled watching for changes": "المسح الدوري خلال فترة زمنية معينة وتعطيل مشاهدة التغييرات.",
+    "Periodic scanning at given interval and enabled watching for changes": "المسح الدوري خلال فترة زمنية معينة وتفعيل مشاهدة التغييرات.",
+    "Periodic scanning at given interval and failed setting up watching for changes, retrying every 1m:": "المسح الدوري خلال فترة زمنية معينة وفشل اعداد مشاهدة التغييرات، اعادة المحاولة كل 1 دقيقة.",
+    "Please consult the release notes before performing a major upgrade.": "يرجى العودة إلى ملاحظات الإصدار قبل تنفيذ ترقية رئيسية.",
+    "Please wait": "يرجى الانتظار",
+    "Preview": "معاينة",
+    "Preview Usage Report": "معاينة تقرير الاستخدام",
+    "Quick guide to supported patterns": "الدليل مختصر للأنماط المدعومة ",
+    "Random": "عشوائي",
+    "Receive Only": "استقبال فقط",
+    "Recent Changes": "اخر التغييرات",
+    "Reduced by ignore patterns": "تقليص بواسطة تجاهل الأنماط. ",
+    "Release Notes": "ملاحظات الإصدار",
+    "Remote Devices": "جهاز بعيد",
+    "Remove": "إزالة",
+    "Remove Device": "حذف جهاز",
+    "Remove Folder": "حذف مجلد",
+    "Required identifier for the folder. Must be the same on all cluster devices.": "يتطلب معرفًا للمجلد. يجب أن يستخدم نفس المعرف لبقية الأجهزة. ",
+    "Rescan": "إعادة فحص",
+    "Rescan All": "أعادة فحص الكل",
+    "Rescans": "يعيد الفحص",
+    "Restart": "إعادة تشغيل",
+    "Restart Needed": "مطلوب أعادة تشغيل",
+    "Restarting": "يتم إعادة التشغيل",
+    "Restore": "استعادة",
+    "Restore Versions": "استعادة أصدارات ",
+    "Resume": "استرد",
+    "Resume All": "استعادة الكل ",
+    "Reused": "إعادة الاستخدام",
+    "Revert Local Changes": "التراجع عن التغييرات",
+    "Save": "حفظ",
+    "Scan Time Remaining": "فحص الوقت المتبقي",
+    "Scanning": "يتم الفحص",
+    "See external versioning help for supported templated command line parameters.": "راجع تعليمات الإصدارات الخارجية لمعرفة القيم المدعومة في سطر الأوامر. ",
+    "Select All": "تحديد الكل",
+    "Select a version": "اختار أصدار ",
+    "Select latest version": "اختار اخر أصدار ",
+    "Select oldest version": "اختيار أقدم إصدار",
+    "Send & Receive": "إرسال واستقبال ",
+    "Send Only": "إرسال فقط",
+    "Settings": "إعدادات",
+    "Share": "مشاركة",
+    "Share Folder": "مشاركة مجلد",
+    "Share this folder?": "مشاركة هذا المجلد؟",
+    "Shared With": "مشاركة مع",
+    "Sharing": "مشاركه",
+    "Show ID": "عرض الهوية",
+    "Show QR": "اظهار QR",
+    "Show diff with previous version": "اظهر الفرق مع النسخة السابقة ",
+    "Shutdown": "إغلاق",
+    "Shutdown Complete": "تم الإغلاق",
+    "Size": "حجم",
+    "Smallest First": "الأصغر أولا",
+    "Some items could not be restored:": "بعض العناصر لا يمكن استرجاعها:",
+    "Source Code": "مصدر الشفرة",
+    "Stable releases and release candidates": "الإصدارات المستقرة والإصدارات المرشحة.",
+    "Stable releases are delayed by about two weeks. During this time they go through testing as release candidates.": "الإصدارات المستقرة تأخرت بنحو أسبوعين. خلال هذه الفترة يتم إجراء الاختبارات كإصدارات مرشحة.",
+    "Stable releases only": "الإصدارات المستقرة فقط",
+    "Start Browser": "تشغيل المتصفح",
+    "Statistics": "إحصائيات",
+    "Stopped": "متوقف",
+    "Support": "الدعم",
+    "Support Bundle": "حزمه مدعومه",
+    "Sync Protocol Listen Addresses": "عناوين بروتوكول استقبال المزامنة",
+    "Syncing": "يتم التزامن",
+    "Syncthing has been shut down.": "تم إيقاف Syncthing.",
+    "Syncthing includes the following software or portions thereof:": "المزامنة تتضمن البرامج التالية أو أجزائها:",
+    "Syncthing is restarting.": "يتم إعادة تشغيل Syncthing.",
+    "Syncthing is upgrading.": "يتم تطوير Syncthing.",
+    "Take me back": "رجوع",
+    "The configuration has been saved but not activated. Syncthing must restart to activate the new configuration.": "تم حفظ الإعدادات ولكن لم يتم تفعيلها بعد. يجب أعادة تشغيل Syncthing حتى تم تفعيل الإعدادات.",
+    "The device ID cannot be blank.": "هوية الجهاز لا يمكن أن تكون فارغة.",
+    "The folder ID cannot be blank.": "هوية المجلد لا يمكن أن تكون فارغة.",
+    "The folder ID must be unique.": "يجب أن يكون عنوان المجلد فريد ",
+    "The folder path cannot be blank.": "مسار المجلد لا يمكن أن يكون فارغ",
+    "The following items could not be synchronized.": "فشل مزامنة العناصر التالية",
+    "The following items were changed locally.": "تم تغيير العناصر التالية محليا",
+    "The maximum age must be a number and cannot be blank.": "الحد الأقصى للسن يجب أن يكون رقمًا وألا يكون فارغًا.",
+    "The maximum time to keep a version (in days, set to 0 to keep versions forever).": "الحد الأقصى للاحتفاظ بإصدار ما (بالأيام ، اضبط على 0 للاحتفاظ بالإصدارات إلى الأبد).",
+    "The number of days must be a number and cannot be blank.": "حقل عدد الأيام يجب أن يكون رقم ولا يمكن تركه فارغ.",
+    "The number of days to keep files in the trash can. Zero means forever.": "عدد أيام حفظ الملفات في سلة المهملات. الصفر يعني إلى الأبد.",
+    "The number of old versions to keep, per file.": "عدد النسخ القديمة المحفوظة، لكل ملف. ",
+    "The number of versions must be a number and cannot be blank.": "حقل عدد النسخ يجب أن يكون رقم ولا يمكن أن تركة فارغا.",
+    "The path cannot be blank.": "المسار لا يمكن أن يكون فارغ.",
+    "The rate limit must be a non-negative number (0: no limit)": "يجب أن يكون الحد عددًا غير سالب (0: تعني بلا حد)",
+    "The rescan interval must be a non-negative number of seconds.": "يجب أن يكون الفاصل الزمني لإعادة الفحص عددًا غير سالب من الثواني.",
+    "They are retried automatically and will be synced when the error is resolved.": "تتم إعادة المحاولة تلقائيًا وسيتم مزامنتها عند إصلاح الخطأ.",
+    "This Device": "هذا الجهاز",
+    "This can easily give hackers access to read and change any files on your computer.": "هذا قد يسبب في اختراق جهازك.",
+    "This is a major version upgrade.": "ترقية أساسية ",
+    "Time": "الوقت",
+    "Time the item was last modified": "توقيت اخر تعديل للعنصر",
+    "Twitter": "Twitter",
+    "Type": "نوع",
+    "Unavailable": "غير متوفر",
+    "Unavailable/Disabled by administrator or maintainer": "غير متوفر/معطل من قبل المسؤول أو الصيانة",
+    "Undecided (will prompt)": "غير محدد ( ستظهر نافذة للتحديد لاحقًا )",
+    "Unignore": "لا يتم التجاهل",
+    "Unknown": "غير معرف",
+    "Unshared": "غير مشترك",
+    "Up to Date": "اخز أصدار ",
+    "Upgrade": "ترقية",
+    "Upgrade To {%version%}": "ترقية الى {{version}} ",
+    "Upgrading": "جاري الترقية",
+    "Upload Rate": "معدل الرفع",
+    "Uptime": "وقت التشغيل",
+    "Usage reporting is always enabled for candidate releases.": "تقارير الاستخدام مفعلة دائمًا للنسخ المرشحة.",
+    "Use HTTPS for GUI": "استخدام HTTPS مع الواجه الرسومية ",
+    "Use notifications from the filesystem to detect changed items.": "استخدم أشغارات نظام الملفات لمعرفة الملفات المتغيرة",
+    "Version": "الإصدار",
+    "Versions": "نسخ",
+    "Versions Path": "مسار النسخ",
+    "Versions are automatically deleted if they are older than the maximum age or exceed the number of files allowed in an interval.": "يتم حذف الإصدارات تلقائيًا إذا تجاوزت العمر الأقصى أو تجاوزت عدد الملفات المسموح بها خلال فاصل زمني محدد.",
+    "Watch for Changes": "راقب التغييرات",
+    "Watching for Changes": "جاري مراقبة التغيرات",
+    "Watching for changes discovers most changes without periodic scanning.": "مراقبة التغييرات تكشف معظم التغييرات دون إجراء المسح الدوري.",
+    "When adding a new device, keep in mind that this device must be added on the other side too.": "يجب أضافه الأجهزة الجديدة في الطرفين",
+    "When adding a new folder, keep in mind that the Folder ID is used to tie folders together between devices. They are case sensitive and must match exactly between all devices.": "عند إضافة مجلد جديد ، ضع في الاعتبار أن معرف المجلد يُستخدم لربط المجلدات معًا بين الأجهزة المختلفة. وهي حساسة لحالة الأحرف لذا يجب أن تتطابق تمامًا بين جميع الأجهزة.",
+    "Yes": "نعم",
+    "You can also select one of these nearby devices:": "يمكنك أيضا اختيار واحد من الأجهزة القريبة ",
+    "You can change your choice at any time in the Settings dialog.": "يمكنك تغيير اختيارك في أي وقت بواسطة الاعدادات.",
+    "You can read more about the two release channels at the link below.": "يمكنك قراءة المزيد عن إصداريّ القناتين عبر الرابط بالأسفل.",
+    "You have no ignored devices.": "لا يوجد أجهزة في قائمة التجاهل ",
+    "You have no ignored folders.": "لا يوجد مجلدات في قائمه التجاهل ",
+    "You have unsaved changes. Do you really want to discard them?": "الإعدادات لم تحفظ. هل انت متأكد من الإلغاء؟ ",
+    "You must keep at least one version.": "يجب الاحتفاظ بنسخة واحده على الاقل",
+    "days": "أيام",
+    "directories": "مجلدات",
+    "files": "ملفات",
+    "full documentation": "الوثائق الكاملة",
+    "items": "العناصر",
+    "{%device%} wants to share folder \"{%folder%}\".": "{{device}} يريد مشاركة مجلد \"{{folder}}\". ",
+    "{%device%} wants to share folder \"{%folderlabel%}\" ({%folder%}).": "{{device}} يريد مشاركة مجلد \"{{folderlabel}}\" ({{folder}}). "
+}