mirror of
https://github.com/tailscale/tailscale.git
synced 2026-04-12 02:18:00 -04:00
647deed2d9
Add misc/install-git-hooks.go and misc/git_hook/ to the OSS repo, adapted from the corp repo. The primary motivation is Change-Id generation in commit messages, which provides a persistent identifier for a change across cherry-picks between branches. The installer uses "git rev-parse --git-common-dir" instead of go-git to find the hooks directory, avoiding a new direct dependency while still supporting worktrees. Hooks included: - commit-msg: adds Change-Id trailer - pre-commit: blocks NOCOMMIT / DO NOT SUBMIT markers - pre-push: blocks local-directory replace directives in go.mod - post-checkout: warns when the hook binary is outdated Also update docs/commit-messages.md to reflect that Change-Id is no longer optional in the OSS repo. Updates tailscale/corp#39860 Change-Id: I09066b889118840c0ec6995cc03a9cf464740ffa Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
83 lines
1.7 KiB
Go
83 lines
1.7 KiB
Go
// Copyright (c) Tailscale Inc & contributors
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build ignore
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// The install-git-hooks program installs git hooks.
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//
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// It installs a Go binary at .git/hooks/ts-git-hook and a pre-hook
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// forwarding shell wrapper to .git/hooks/NAME.
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package main
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import (
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"fmt"
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"log"
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"strings"
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)
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var hooks = []string{
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"pre-push",
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"pre-commit",
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"commit-msg",
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"post-checkout",
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}
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func fatalf(format string, a ...any) {
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log.SetFlags(0)
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log.Fatalf("install-git-hooks: "+format, a...)
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}
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func main() {
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out, err := exec.Command("git", "rev-parse", "--git-common-dir").CombinedOutput()
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if err != nil {
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fatalf("finding git dir: %v, %s", err, out)
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}
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gitDir := strings.TrimSpace(string(out))
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hookDir := filepath.Join(gitDir, "hooks")
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if fi, err := os.Stat(hookDir); err != nil {
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fatalf("checking hooks dir: %v", err)
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} else if !fi.IsDir() {
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fatalf("%s is not a directory", hookDir)
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}
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buildOut, err := exec.Command(goBin(), "build",
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"-o", filepath.Join(hookDir, "ts-git-hook"+exe()),
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"./misc/git_hook").CombinedOutput()
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if err != nil {
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log.Fatalf("go build git-hook: %v, %s", err, buildOut)
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}
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for _, hook := range hooks {
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content := fmt.Sprintf(hookScript, hook)
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file := filepath.Join(hookDir, hook)
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// Install the hook. If it already exists, overwrite it, in case there's
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// been changes.
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if err := os.WriteFile(file, []byte(content), 0755); err != nil {
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fatalf("%v", err)
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}
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}
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}
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const hookScript = `#!/usr/bin/env bash
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exec "$(dirname ${BASH_SOURCE[0]})/ts-git-hook" %s "$@"
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`
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func goBin() string {
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if p, err := exec.LookPath("go"); err == nil {
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return p
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}
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return "go"
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}
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func exe() string {
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if runtime.GOOS == "windows" {
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return ".exe"
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}
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return ""
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}
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