fix(release): skip no-op release drafts

.github/workflows/release.yml

@@ -25,16 +25,23 @@ jobs:
           curl -fsSL -o "/tmp/${archive}" "https://github.com/orhun/git-cliff/releases/download/v${GIT_CLIFF_VERSION}/${archive}"
           tar -xzf "/tmp/${archive}" -C /tmp
           install "/tmp/git-cliff-${GIT_CLIFF_VERSION}/git-cliff" /usr/local/bin/git-cliff
+      - name: Check for unreleased changes
+        id: changes
+        run: |
+          echo "has_changes=$(python3 scripts/release.py has-unreleased-changes)" >> "${GITHUB_OUTPUT}"
       - name: Compute release version
         id: version
+        if: steps.changes.outputs.has_changes == 'true'
         run: echo "release_version=$(python3 scripts/release.py next-version)" >> "${GITHUB_OUTPUT}"
       - name: Generate changelog
+        if: steps.changes.outputs.has_changes == 'true'
         env:
           GITHUB_REPO: ${{ github.repository }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           RELEASE_VERSION: ${{ steps.version.outputs.release_version }}
         run: git-cliff --config cliff.toml --tag "${RELEASE_VERSION}" --output CHANGELOG.md
       - name: Create release PR
+        if: steps.changes.outputs.has_changes == 'true'
         uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8.1.0
         with:
           commit-message: "chore(release): ${{ steps.version.outputs.release_version }}"

scripts/release.py

@@ -46,6 +46,28 @@ def git_tags() -> list[str]:
     return [line.strip() for line in output.splitlines() if line.strip()]
 
 
+def latest_release_tag(dockerfile: pathlib.Path, upstream: pathlib.Path) -> str | None:
+    upstream_version = read_upstream_version(dockerfile, upstream)
+    pattern = re.compile(rf"^{re.escape(upstream_version)}-aio\.(\d+)$")
+    matches: list[tuple[int, str]] = []
+    for tag in git_tags():
+        match = pattern.match(tag)
+        if match:
+            matches.append((int(match.group(1)), tag))
+    if not matches:
+        return None
+    matches.sort(key=lambda item: item[0])
+    return matches[-1][1]
+
+
+def has_unreleased_changes(dockerfile: pathlib.Path, upstream: pathlib.Path) -> bool:
+    latest_tag = latest_release_tag(dockerfile, upstream)
+    if latest_tag is None:
+        return True
+    output = subprocess.check_output(["git", "log", "--format=%s", f"{latest_tag}..HEAD"], cwd=ROOT, text=True)
+    return any(line.strip() for line in output.splitlines())
+
+
 def next_release_version(dockerfile: pathlib.Path, upstream: pathlib.Path) -> str:
     upstream_version = read_upstream_version(dockerfile, upstream)
     pattern = re.compile(rf"^{re.escape(upstream_version)}-aio\.(\d+)$")
@@ -98,6 +120,9 @@ def main() -> None:
     next_parser = subparsers.add_parser("next-version")
     next_parser.add_argument("--dockerfile", type=pathlib.Path, default=DEFAULT_DOCKERFILE)
     next_parser.add_argument("--upstream-config", type=pathlib.Path, default=DEFAULT_UPSTREAM)
+    changes_parser = subparsers.add_parser("has-unreleased-changes")
+    changes_parser.add_argument("--dockerfile", type=pathlib.Path, default=DEFAULT_DOCKERFILE)
+    changes_parser.add_argument("--upstream-config", type=pathlib.Path, default=DEFAULT_UPSTREAM)
     latest_parser = subparsers.add_parser("latest-changelog-version")
     latest_parser.add_argument("--changelog", type=pathlib.Path, default=DEFAULT_CHANGELOG)
     notes_parser = subparsers.add_parser("extract-release-notes")
@@ -108,6 +133,8 @@ def main() -> None:
         print(read_upstream_version(args.dockerfile, args.upstream_config))
     elif args.command == "next-version":
         print(next_release_version(args.dockerfile, args.upstream_config))
+    elif args.command == "has-unreleased-changes":
+        print("true" if has_unreleased_changes(args.dockerfile, args.upstream_config) else "false")
     elif args.command == "latest-changelog-version":
         print(latest_changelog_version(args.changelog))
     else: