chore: improve release CI

.github/workflows/finish_release.yml

@@ -0,0 +1,39 @@
+name: Finish Release
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build:
+    env:
+      RELEASE_BRANCH_NAME: "__timefold_release_branch__"
+    runs-on: ubuntu-latest
+    timeout-minutes: 120
+    steps:
+      - name: Checkout timefold-solver
+        uses: actions/checkout@v4
+        with:
+          ref: main
+          fetch-depth: 0 # Otherwise merge will fail on account of not having history.
+
+      - name: Update release branch
+        shell: bash
+        run: |
+          tag=${{ github.ref }}
+          tag_version=${tag##*/}
+          version=${tag_version%.*}
+          version="${version:1}.x"
+          echo $version
+          if [ `git rev-parse --verify $version 2>/dev/null` ]; then
+            git checkout $version
+            git merge -s theirs --no-edit --squash $RELEASE_BRANCH_NAME
+            git commit -m "build: release version $tag_version"
+            git push origin $version
+            git push -d origin $RELEASE_BRANCH_NAME
+          else
+            git checkout $RELEASE_BRANCH_NAME
+            git branch -m $RELEASE_BRANCH_NAME $version
+            git push origin -u $version
+            git push -d origin $RELEASE_BRANCH_NAME
+          fi

.github/workflows/release.yml

@@ -24,10 +24,6 @@ on:
         description: 'Branch to cut the release from'
         default: main
         required: true
-      releaseBranch:
-        description: 'Release branch to create (e.g. 1.0.x for version 1.0.0; once created, branch protection rules apply)'
-        default: dry_run
-        required: true
       dryRun:
         description: 'Do a dry run? (true or false)'
         default: true
@@ -36,6 +32,7 @@ jobs:
   build:
     env:
       MAVEN_ARGS: "--no-transfer-progress --batch-mode"
+      RELEASE_BRANCH_NAME: "__timefold_release_branch__"
     runs-on: ubuntu-latest
     environment:
       name: pypi
@@ -51,11 +48,15 @@ jobs:
           fetch-depth: 0
           ref: ${{ github.event.inputs.sourceBranch }}
 
+      - name: Init release branch
+        continue-on-error: true
+        run: git push -d origin $RELEASE_BRANCH_NAME
+
       - name: Create release branch and switch to it
         run: |
           git config user.name "Timefold Release Bot"
           git config user.email "[email protected]"
-          git checkout -b ${{ github.event.inputs.releaseBranch }}
+          git checkout -b $RELEASE_BRANCH_NAME
 
       - uses: actions/setup-java@v4
         with:
@@ -92,7 +93,7 @@ jobs:
           git add docs/src/antora.yml
           find . -name 'pom.xml' | xargs git add
           git commit -m "build: release version ${{ github.event.inputs.version }}"
-          git push origin ${{ github.event.inputs.releaseBranch }}
+          git push origin $RELEASE_BRANCH_NAME
 
       - name: Run JReleaser
         uses: jreleaser/release-action@v2
@@ -117,16 +118,4 @@ jobs:
 
       - name: Publish distribution to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
-        if: ${{ github.event.inputs.dryRun == 'false' }}
-
-      # Pull Request will be created with the changes and a summary of next steps.
-      - name: Put back the 999-SNAPSHOT version on the release branch
-        run: |
-          git checkout -B ${{ github.event.inputs.releaseBranch }}-put-back-999-snapshot
-          mvn -Dfull versions:set -DnewVersion=999-SNAPSHOT
-          sed -i "s/^timefold_solver_python_version.*=.*/timefold_solver_python_version = '999-dev0'/" setup.py
-          git commit -am "build: move back to 999-SNAPSHOT"
-          git push origin ${{ github.event.inputs.releaseBranch }}-put-back-999-snapshot
-          gh pr create --reviewer triceo --base ${{ github.event.inputs.releaseBranch }} --head ${{ github.event.inputs.releaseBranch }}-put-back-999-snapshot --title "build: move back to 999-SNAPSHOT" --body-file .github/workflows/release-pr-body.md
-        env:
-          GITHUB_TOKEN: ${{ secrets.JRELEASER_GITHUB_TOKEN }}
+        if: ${{ github.event.inputs.dryRun == 'false' }}