Automatically release latest snap when building a tag

.github/workflows/build_release.yml

@@ -141,4 +141,22 @@ jobs:
         name: macOS binary (not notarized)
     - name: Prepare official release
       if: env.AUTOMATION_GITHUB_TOKEN && startsWith(github.ref, 'refs/tags/')
-      run: python3 builder/package.py release
+      run: python3 builder/package.py release
+
+  release_snap:
+    name: Release Snap
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && contains(github.ref, 'refs/tags/')
+    env:
+      SNAP_TOKEN: ${{ secrets.SNAP_TOKEN }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.x"
+      - name: Release latest available Snap
+        run: |
+          sudo snap install snapcraft --classic
+          echo "${SNAP_TOKEN}" | snapcraft login --with -
+          python3 snap/local/release_snap.py

snap/local/release_snap.py

@@ -0,0 +1,68 @@
+#!/usr/bin/python3 -OO
+# Copyright 2007-2022 The SABnzbd-Team <team@sabnzbd.org>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+"""
+Automatically release the latest "edge" snap.
+This might not be the latest commit, but it will have to do.
+"""
+
+import subprocess
+from typing import List
+
+
+def run_external_command(command: List[str]) -> str:
+    """Wrapper to ease the use of calling external programs"""
+    process = subprocess.Popen(command, text=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+    output, _ = process.communicate()
+    ret = process.wait()
+    if output:
+        print(output)
+    if ret != 0:
+        raise RuntimeError("Command returned non-zero exit code %s!" % ret)
+    return output
+
+
+# Read the current status
+snap_status = run_external_command(["snapcraft", "status", "sabnzbd"])
+
+if not snap_status:
+    raise ValueError("No information to parse")
+
+# To store the version
+arch = None
+
+# Parse line-by-line
+for line in snap_status.splitlines():
+    split_line = line.split()
+
+    # First line has 1 extra word
+    if "latest" in split_line:
+        split_line.remove("latest")
+
+    # Only care for the lines that have the revision and the arch
+    if len(split_line) == 4:
+        arch = split_line[0]
+        if arch not in ("amd64", "arm64", "armhf"):
+            # Don't care about this arch
+            arch = None
+
+    # Line that has the channel and the revision, but not the arch
+    if len(split_line) == 3:
+        # Do we have an arch that we care about?
+        if arch and split_line[0] == "edge":
+            # Release this version
+            run_external_command(["snapcraft", "release", "sabnzbd", split_line[2], "stable"])