ci: Add conventional commits workflow

.commitlintrc.yml

@@ -0,0 +1,19 @@
+# SPDX-FileCopyrightText: Copyright DB InfraGO AG contributors
+# SPDX-License-Identifier: CC0-1.0
+rules:
+  body-leading-blank: [2, always]
+  footer-leading-blank: [2, always]
+  scope-case: [2, always, lower-case]
+  subject-case: [2, always, sentence-case]
+  subject-empty: [2, never]
+  subject-full-stop: [2, never, .]
+  subject-max-length: [2, always, 72]
+  type-empty: [2, never]
+  type-enum:
+    [
+      2,
+      always,
+      [build, chore, ci, docs, feat, fix, merge, perf, refactor, revert, test],
+    ]
+extends:
+  - "@commitlint/config-conventional"

.github/workflows/commits.yml

@@ -0,0 +1,63 @@
+# SPDX-FileCopyrightText: Copyright DB InfraGO AG
+# SPDX-License-Identifier: CC0-1.0
+
+name: Commits
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  conventional-commits:
+    runs-on: ubuntu-latest
+    concurrency:
+      group: commit-check-pr-${{ github.event.pull_request.number }}
+      cancel-in-progress: true
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Install commitlint
+        run: npm install @commitlint/cli @commitlint/config-conventional
+      - name: Validate commit messages
+        id: conventional-commits
+        env:
+          SHA_FROM: ${{ github.event.pull_request.base.sha }}
+          SHA_TO: ${{ github.event.pull_request.head.sha }}
+        run: |
+          delim="_EOF_$(uuidgen)"
+          echo "validation-result<<$delim" >> "$GITHUB_OUTPUT"
+          r=0
+          npx commitlint --from "$SHA_FROM" --to "$SHA_TO" >> "$GITHUB_OUTPUT" 2>&1 || r=$?
+          echo "$delim" >> "$GITHUB_OUTPUT"
+          exit $r
+      - name: Find conventional commit comment on PR
+        uses: peter-evans/find-comment@v3
+        if: always() && steps.conventional-commits.outcome == 'failure'
+        id: fc
+        with:
+          issue-number: ${{ github.event.pull_request.number }}
+          comment-author: 'github-actions[bot]'
+          body-includes: conventional commit
+      - name: Post comment if validation failed
+        uses: peter-evans/create-or-update-comment@v4
+        if: always() && steps.conventional-commits.outcome == 'failure'
+        with:
+          comment-id: ${{ steps.fc.outputs.comment-id }}
+          issue-number: ${{ github.event.pull_request.number }}
+          edit-mode: replace
+          body: |
+            The pull request does not conform to the conventional commit specification. Please ensure that your commit messages follow the spec: <https://www.conventionalcommits.org/>.
+            We also strongly recommend that you set up your development environment with pre-commit.
+
+            This is the commit validation log:
+            ```
+            ${{ steps.conventional-commits.outputs.validation-result }}
+            ```
+
+            Here are some examples of valid commit messages:
+            ```
+            feat(model): Add realized_states to State and Mode
+            fix(aird): Prevent creating circles with r=0
+            docs(readme): Update project description
+            ```

.pre-commit-config.yaml

@@ -5,7 +5,7 @@ default_install_hook_types: [commit-msg, pre-commit]
 default_stages: [commit, merge-commit]
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.4.0
+    rev: v4.6.0
     hooks:
       - id: check-added-large-files
       - id: check-builtin-literals
@@ -21,7 +21,7 @@ repos:
       - id: end-of-file-fixer
       - id: trailing-whitespace
   - repo: https://github.com/Lucas-C/pre-commit-hooks
-    rev: v1.5.1
+    rev: v1.5.5
     hooks:
       - id: insert-license
         name: Insert license headers (XML-style comments)
@@ -33,10 +33,13 @@ repos:
           - --comment-style
           - "<!--| ~| -->"
   - repo: https://github.com/fsfe/reuse-tool
-    rev: v1.1.2
+    rev: v4.0.3
     hooks:
       - id: reuse
-  - repo: https://github.com/qoomon/git-conventional-commits
-    rev: v2.6.4
+  - repo: https://github.com/alessandrojcm/commitlint-pre-commit-hook
+    rev: v9.16.0
     hooks:
-      - id: conventional-commits
+      - id: commitlint
+        stages: [commit-msg]
+        additional_dependencies:
+          - "@commitlint/config-conventional"