#571 Use pre-commit dog food and update release process for pre-commit autoupdate.

.github/workflows/ci.yml

@@ -195,6 +195,36 @@ jobs:
       if: ${{ matrix.task.run-if }}
 
 
+  pre-commit:
+    name: Check pre-commit integration
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Set up python
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.12
+
+    - name: Install dependencies
+      run: python -m pip install pre-commit
+
+    - name: Install pre-commit
+      run: |
+        pre-commit install
+
+    - name: Update pre-commit
+      run: |
+        pre-commit autoupdate
+
+    - name: Run pre-commit
+      run: |
+        pre-commit run -a
+
+
   pypi-publish:
     name: Check tag and publish
     # Only trigger this for tag changes.
@@ -292,6 +322,7 @@ jobs:
       - test-windows
       - coverage
       - check
+      - pre-commit
     steps:
       - name: Require all successes
         uses: re-actors/alls-green@3a2de129f0713010a71314c74e33c0e3ef90e696

.pre-commit-config.yaml

@@ -33,3 +33,8 @@ repos:
       - id: debug-statements
       - id: check-toml
       - id: check-yaml
+
+  - repo: https://github.com/twisted/towncrier
+    rev: 23.11.0
+    hooks:
+      - id: towncrier-check

RELEASE.rst

@@ -102,7 +102,14 @@ In ``src/towncrier/_version.py`` the version is set using ``incremental`` such a
 
 Commit and push the changes.
 
-Merge the commit in the main branch.
+Merge the commit in the main branch, **without using squash**.
+
+We tag the release based on a commit from the release branch.
+If we merge with squash,
+the release tag commit will no longer be found in the main branch history.
+With a squash merge, the whole branch history is lost.
+This causes the `pre-commit autoupdate` to fail.
+See `PR590 <https://github.com/twisted/towncrier/pull/590>`_ for more details.
 
 You can announce the release over IRC or Gitter.
 

docs/pre-commit.rst

@@ -16,7 +16,7 @@ Usage with the default configuration
 
     repos:
       - repo: https://github.com/twisted/towncrier
-        rev: 22.13.0  # run 'pre-commit autoupdate' to update
+        rev: 23.11.0  # run 'pre-commit autoupdate' to update
         hooks:
           - id: towncrier-check
 
@@ -30,7 +30,7 @@ News fragments are stored in ``changelog.d/`` in the root of the repository and
 
     repos:
       - repo: https://github.com/twisted/towncrier
-        rev: 22.13.0  # run 'pre-commit autoupdate' to update
+        rev: 23.11.0  # run 'pre-commit autoupdate' to update
         hooks:
           - id: towncrier-update
             files: $changelog\.d/