ci: release pull requests, and conventional-commit PR titles (#1)

Releases as pull requests, the same in all five app repos (hub, catalog, live, riftbound, karaoke). The Gitea side (PRs only into main, squash merges, required checks, `v*` tags only by release-bot, its `RELEASE_TOKEN` org secret) is dhkatz/infra `modules/app-repo`. - **`.gitea/workflows/pull-request.yml`**: the PR title must be a conventional commit (`feat(api): …`, `fix: …`, `feat!: …`); it becomes the commit on main. `chore(release)` only from release-bot's `release` branch. Required to merge (`Pull request / title`). - **`.gitea/default_merge_message/SQUASH_TEMPLATE.md`**: the squash commit is `<PR title> (#<n>)` plus the description. - **`.gitea/workflows/release.yml`**, on every push to main, as release-bot (`RELEASE_TOKEN`): - if the commit is a merged `chore(release): vX.Y.Z`: tag it vX.Y.Z (lightweight), push the tag (CI builds the image, Komodo deploys prod), publish the release with git-cliff's notes; - otherwise, if anything releasable landed since the last tag: rewrite the `release` branch (CHANGELOG.md) and open or update `chore(release): vX.Y.Z`. - **`cliff.toml`** (git-cliff 2.14.2, pinned by sha512): feat → minor, fix/perf/revert → patch, breaking → minor while 0.x; chore/ci/docs/test/style/build/refactor alone don't release. Only conventional commits count, so the history before this is left out. - **`CHANGELOG.md`**: header only; release PRs fill it. - Agent notes (CLAUDE.md / AGENTS.md): the PR flow and title format; never tag by hand. After merging, `Release` runs on main and should report nothing to release (this PR is `ci:`); the first `feat:`/`fix:` PR merged after it opens the first release PR. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Reviewed-on: #1 Co-authored-by: dhkatz <[email protected]>
2026-11-03 08:40:38 +00:00
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+# Releases. release-bot keeps one pull request open from the `release` branch, "chore(release): vX.Y.Z": the next
+# version and its CHANGELOG.md entry, which git-cliff (cliff.toml) works out from the conventional commits on main
+# since the last tag. Merging it makes release-bot tag vX.Y.Z on main and publish the release notes; the tag builds the
+# image (ci.yml) and Komodo deploys it to prod (dhkatz/infra). Only release-bot may create v* tags. It acts with its
+# own token (the org secret RELEASE_TOKEN), not this workflow's: Gitea starts no workflows for what that one does, so
+# the release pull request's checks and the tag's build would never run.
+name: Release
+
+on:
+  push:
+    branches: [main]
+
+concurrency:
+  group: release
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    env:
+      CLIFF_VERSION: 2.14.2
+      CLIFF_SHA512: 95b0c55ab3e351ca7c0285fbbde8f1e8c42906466a173e6884f5c7ca814523bda44cbd4ab26b0aa28cace4c02c5ee6b553e9742bd9d7df47a73b9ef58ea429a9
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - name: Install git-cliff
+        run: |
+          archive="git-cliff-$CLIFF_VERSION-x86_64-unknown-linux-musl.tar.gz"
+          curl -fsSLO "https://github.com/orhun/git-cliff/releases/download/v$CLIFF_VERSION/$archive"
+          echo "$CLIFF_SHA512  $archive" | sha512sum -c -
+          mkdir -p "$HOME/.local/bin"
+          tar -xzf "$archive" --strip-components=1 -C "$HOME/.local/bin" "git-cliff-$CLIFF_VERSION/git-cliff"
+          rm "$archive"
+          echo "$HOME/.local/bin" >> "$GITHUB_PATH"
+
+      - name: Tag a merged release, or update the release pull request
+        env:
+          TOKEN: ${{ secrets.RELEASE_TOKEN }}
+        run: |
+          set -euo pipefail
+          api="$GITHUB_SERVER_URL/api/v1/repos/$GITHUB_REPOSITORY"
+          host="${GITHUB_SERVER_URL#https://}"
+          git config user.name release-bot
+          git config user.email "release-bot@${host#git.}"
+          basic=$(printf 'release-bot:%s' "$TOKEN" | base64 -w0)
+          push() { git -c http.extraHeader="Authorization: Basic $basic" push "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY.git" "$@"; }
+          gitea() { curl -fsS -H "Authorization: token $TOKEN" -H "Content-Type: application/json" "$@"; }
+
+          # The release pull request was merged: tag its commit and publish the release.
+          if [[ "$(git log -1 --format=%s)" =~ ^chore\(release\):\ (v[0-9]+\.[0-9]+\.[0-9]+) ]]; then
+            tag="${BASH_REMATCH[1]}"
+            if git rev-parse -q --verify "refs/tags/$tag" >/dev/null; then echo "$tag exists already"; exit 0; fi
+            git tag "$tag"
+            push "refs/tags/$tag"
+            jq -n --arg tag "$tag" --arg body "$(git cliff --latest --strip all)" '{tag_name: $tag, name: $tag, body: $body}' |
+              gitea -o /dev/null -X POST "$api/releases" -d @-
+            echo "Released $tag"
+            exit 0
+          fi
+
+          # Otherwise: anything to release since the last tag? (Nothing printed when no commit counts.)
+          last=$(git describe --tags --abbrev=0 --match 'v[0-9]*' 2>/dev/null || true)
+          next=$(git cliff --bumped-version 2>/dev/null || true)
+          next="v${next#v}"
+          if [ "$next" = v ] || [ "$next" = "$last" ]; then echo "Nothing to release since ${last:-the start}"; exit 0; fi
+
+          notes=$(git cliff --unreleased --bump --strip all)
+          git switch -C release
+          git cliff --bump --output CHANGELOG.md
+          git add CHANGELOG.md
+          git commit -q -m "chore(release): $next"
+          push --force HEAD:refs/heads/release
+
+          title="chore(release): $next"
+          body=$(printf 'Merging this releases **%s**: release-bot tags it on main, CI builds its image, and Komodo deploys it to prod. It updates itself as pull requests are merged.\n\n%s\n' "$next" "$notes")
+          payload=$(jq -n --arg title "$title" --arg body "$body" '{title: $title, body: $body}')
+          open=$(gitea "$api/pulls?state=open&limit=50" | jq -r '[.[] | select(.head.ref == "release")][0].number // empty')
+          if [ -n "$open" ]; then
+            gitea -o /dev/null -X PATCH "$api/pulls/$open" -d "$payload"
+            echo "Updated the release pull request #$open: $title"
+          else
+            jq '. + {head: "release", base: "main"}' <<<"$payload" | gitea -o /dev/null -X POST "$api/pulls" -d @-
+            echo "Opened the release pull request: $title"
+          fi