Make change log entries mandatory with every PR

.github/workflows/changelog.yml

@@ -0,0 +1,26 @@
+name: "Changelog Updated"
+on:
+  pull_request:
+    # The specific activity types are listed here to include "labeled" and "unlabeled"
+    # (which are not included by default for the "pull_request" trigger).
+    # This is needed to allow skipping enforcement of the changelog in PRs with specific labels,
+    # as defined in the (optional) "skipLabels" property.
+    types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
+
+jobs:
+  # Enforces the update of a changelog file on every pull request.
+  changelog:
+    runs-on: ubuntu-latest
+    steps:
+      # CHANGELOG.md
+      - uses: dangoslen/changelog-enforcer@v3
+        with:
+          skipLabels: 'Skip Changelog'
+          versionPattern: '## \\[((v|V)?\\d*\\.\\d*\\.\\d*-?\\w*|unreleased|Unreleased|UNRELEASED|Dev)\\]'
+
+      # readme.txt
+      - uses: dangoslen/changelog-enforcer@v3
+        with:
+          changeLogPath: 'readme.txt'
+          skipLabels: 'Skip Changelog'
+          versionPattern: '^=\\s*((v|V)?\\d+\\.\\d+\\.\\d+|Dev)\\s*='

CHANGELOG.md

@@ -27,6 +27,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Unit tests for the `ActivityPub\Transformer\Post` class
 
+### Added
+
+* GitHub action to enforce Changelog updates.
+
 ### Improved
 
 * Reuse constants once they're defined

readme.txt

@@ -150,6 +150,10 @@ For reasons of data protection, it is not possible to see the followers of other
 
 == Changelog ==
 
+= Dev =
+
+* Added: GitHub action to enforce Changelog updates.
+
 = 4.2.1 =
 
 * Added: Mastodon Apps status provider