Update Release Workflow

Author: LitschiW

.github/workflows/checkstyle.yml

@@ -2,6 +2,8 @@ name: Run Checkstyle
 
 on:
   push:
+  pull_request_target:
+    branches: [ master ]
 
 jobs:
   run_checkstyle:
@@ -12,7 +14,7 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Set up Java 16
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v3
         with:
           java-version: '16'
           distribution: 'adopt'

.github/workflows/release.yml

@@ -5,15 +5,16 @@ on:
     branches: [ master ]
 
 jobs:
-  release:
+  Prepare-and-Release:
+    name: Prepare and Release
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout
         uses: actions/checkout@v3
 
       - name: Set up Java 16
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v3
         with:
           java-version: '16'
           distribution: 'adopt'
@@ -25,12 +26,48 @@ jobs:
           git config --global committer.name "GitHub Release Workflow"
           git config --global author.email "${GITHUB_ACTOR}@users.noreply.github.com"
           git config --global author.name "${GITHUB_ACTOR}"
+          
       - name: Get Maven version
         run: |
           export MAVEN_VERSION=$( mvn help:evaluate -Dexpression=project.version -q -DforceStdout | sed "s/-SNAPSHOT$//" )
           echo "Retreived Maven Version: $MAVEN_VERSION"
           echo "MAVEN_VERSION=$MAVEN_VERSION" >> $GITHUB_ENV
-      - name: Release Maven Artifact
+          
+      - name: Prepare & Release Maven Artifact
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: mvn -B release:prepare release:perform
+        run: |
+          git checkout -B "MiSim-${{env.MAVEN_VERSION}}"
+          mvn -B release:prepare release:perform
+          git clean -f
+          
+      - name: Create Pull Request to Master
+        id: open-pr
+        uses: repo-sync/pull-request@v2
+        with:
+          source_branch: "MiSim-${{env.MAVEN_VERSION}}"
+          pr_title: "Prepare Release ${{env.MAVEN_VERSION}}"
+          pr_body: "This pull request updates the MiSim pom for version ${{env.MAVEN_VERSION}} and prepares the next Snapshot.<br>It will be merged automatically."
+#           pr_assignee: "LitschiW"
+          pr_allow_empty: false
+          pr_label: "automerge" 
+          github_token: ${{ secrets.PUBLISHER_TOKEN }}
+          
+      - name: Automerge Pull Request
+        id: automerge
+        env:
+          PULL_REQUEST: ${{steps.open-pr.outputs.pr_number}}
+          MERGE_COMMIT_MESSAGE: 'Update to ${{env.MAVEN_VERSION}} and prepare next SNAPSHOT'
+          MERGE_DELETE_BRANCH: true
+          MERGE_RETRIES: 5
+          MERGE_RETRY_SLEEP: '60000'
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+        uses: "pascalgn/automerge-action@v0.15.5"
+        
+      - name: Check Merge Result
+        if: ${{ steps.automerge.outputs.mergeResult != 'merged' }}
+        run: | 
+          echo "Merge of Pull Request ${{steps.open-pr.outputs.pr_number}} failed."
+          echo "Expected state 'merged', but found '${{steps.automerge.outputs.mergeResult}}'."
+          echo "See ${{steps.open-pr.outputs.pr_url}} for further info."
+          exit 1