Add a workflow to update the changelog

.github/workflows/publish.yml

@@ -0,0 +1,68 @@
+name: publish
+
+on:
+  release:
+    types: [released]
+
+jobs:
+  publish:
+    name: Release build and publish
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Fetch Sources
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.release.tag_name }}
+
+      - name: Set up a JDK
+        id: setup-jdk
+        uses: actions/setup-java@v4
+        with:
+          java-version: 21
+          distribution: zulu
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      # Set environment variables
+      - name: Export Properties
+        id: properties
+        shell: bash
+        run: |
+          CHANGELOG="$(cat << 'EOM' | sed -e 's/^[[:space:]]*$//g' -e '/./,$!d'
+          ${{ github.event.release.body }}
+          EOM
+          )"
+
+          echo "changelog<<EOF" >> $GITHUB_OUTPUT
+          echo "$CHANGELOG" >> $GITHUB_OUTPUT
+          echo "EOF" >> $GITHUB_OUTPUT
+
+      # Update Unreleased section with the current release note
+      - name: Patch Changelog
+        if: ${{ steps.properties.outputs.changelog != '' }}
+        env:
+          CHANGELOG: ${{ steps.properties.outputs.changelog }}
+        run: |
+          ./gradlew patchChangelog --release-note="$CHANGELOG"
+
+      - name: Open PR for Changelog Update
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          VERSION="${{ github.event.release.tag_name }}"
+          BRANCH="changelog-update-$VERSION"
+          git config user.name github-actions
+          git config user.email [email protected]
+          git checkout -b $BRANCH
+          git commit -am "Changelog update - $VERSION"
+          git push --set-upstream origin $BRANCH
+          gh pr create \
+            --title "Changelog update - \`$VERSION\`" \
+            --body "Current pull request contains patched \`changelog.md\` file for the \`$VERSION\` version." \
+            --base master \
+            --head $BRANCH