Simplify GitHub workflows for pull requests (#52)

Author: Takishima

.github/workflows/pre-commit-ci.yml

@@ -1,19 +1,59 @@
 ---
 
-name: PR
-on:
+name: Pull requests
+on:  # yamllint disable-line rule:truthy
   pull_request:
     types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
 
 jobs:
-  # Enforces the update of a changelog file on every pull request
+  update-changelog:
+    runs-on: ubuntu-latest
+    name: "Pre-commit CI CHANGELOG auto-update"
+    if: >
+      (github.event.pull_request.title == '[pre-commit.ci] pre-commit autoupdate') &&
+      (github.event.action == 'opened')
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
+          fetch-depth: 0
+          token: ${{ secrets.PRE_COMMIT_CI_CHANGELOG }}
+
+      - name: Setup Python
+        uses: actions/setup-python@v3
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+          cache-dependency-path: '**/setup.cfg'
+
+      - name: Install dependencies
+        run: |
+          python3 -m pip install 'git+https://github.com/Takishima/pre-commit-changelog-auto-update@v1.0.0'
+
+      - name: Run Python script
+        run: |
+          python3 -m update_changelog --pr-body "${{ github.event.pull_request.body }}"
+
+      - name: Commit changes
+        id: commit
+        uses: EndBug/add-and-commit@v9
+        with:
+          author_name: github-actions[bot]
+          author_email: noreply@github.com
+          message: Update CHANGELOG
+
   changelog:
+    needs: update-changelog
     runs-on: ubuntu-latest
+    name: CHANGELOG enforcer
+    if: '!cancelled()'
     steps:
       - uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
+          fetch-depth: 0
 
-      - id: changelog-enforcer
-        uses: dangoslen/changelog-enforcer@v3
+      - uses: dangoslen/changelog-enforcer@v3
         with:
           changeLogPath: 'CHANGELOG.md'
           skipLabels: 'Skip-Changelog'

.github/workflows/pull_request.yml

@@ -15,7 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Replace most Python pre-commit hooks with [ruff](https://beta.ruff.rs/docs/)
 - Update release drafting GitHub workflow
-- Add workflow to automatically update CHANGELOG when pre-commit.ci updates happen
+- Modify pull requests workflow to automatically update CHANGELOG file if it was created by pre-commit.ci
 - Added some more pre-commit hooks:
   - doc8
   - codespell