chore: readd 1.x release workflow (#2344)

Co-authored-by: Timefold Release Bot <release@timefold.ai>

Author: zepfred

.github/workflows/release-1.x.yml

@@ -0,0 +1,110 @@
+# Axioms of the release pipeline:
+# - Each release starts from timefold-solver by running this GitHub Action.
+# - Each individual repository can only start its own release when its dependencies are fully released.
+#   timefold-solver-enterprise depends on timefold-solver
+#   timefold-quickstarts depends on timefold-solver
+#   timefold-website releases last
+# - Each individual repository uses 999-SNAPSHOT as its development version, even on micro branches.
+#
+# Should any of these axioms change, the release pipeline will need to be (significantly) refactored.
+# 0.8.x releases existed before this pipeline; they are done differently, similarities are coincidental.
+
+name: Release Community 1.x to Maven Central
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Release version (e.g. 1.31.0)'
+        required: true
+      sourceBranch:
+        description: 'Branch to cut the release from'
+        default: 1.x
+        required: true
+      dryRun:
+        description: 'Do a dry run?'
+        default: true
+        required: true
+        type: boolean
+jobs:
+  build:
+    env:
+      MAVEN_ARGS: "--no-transfer-progress --batch-mode"
+      RELEASE_BRANCH_NAME: "__timefold_release_branch__"
+    runs-on: self-hosted
+    permissions:
+      contents: write  # IMPORTANT: required for action to create release branch
+      id-token: write  # IMPORTANT: mandatory for trusted publishing
+      attestations: write  # IMPORTANT: mandatory for attestations
+    steps:
+      - name: Print inputs to the release workflow
+        run: echo "${{ toJSON(github.event.inputs) }}"
+
+      - name: Validate the version
+        shell: bash
+        env:
+          VERSION: ${{ github.event.inputs.version }}
+        run: |
+          version="$VERSION"
+          if [[ "$version" != 1.* ]]; then
+            echo "The version input '$version' is invalid. This workflow only supports versions starting with '1.'."
+            exit 1
+          fi
+
+      - name: Checkout timefold-solver
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+          ref: ${{ github.event.inputs.sourceBranch }}
+
+      - name: Delete release branch (if exists)
+        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 "release@timefold.ai"
+          git checkout -b $RELEASE_BRANCH_NAME
+
+      - uses: actions/setup-java@v5
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+          cache: 'maven'
+
+      # We skip tests in dry run, to make the process faster.
+      # Technically, this goes against the main reason for doing a dry run; to eliminate potential problems.
+      # But unless something catastrophic happened, PR checks on source branch already ensured that all tests pass.
+      - name: Set release version and build release
+        env:
+          NEW_VERSION: ${{ inputs.version }}
+          DRY_RUN: ${{ inputs.dryRun }}
+        run: |
+          ./mvnw -Dfull versions:set -DnewVersion="$NEW_VERSION" -DgenerateBackupPoms=false
+          ./mvnw -Dfull deploy -DskipTests=$DRY_RUN -DaltDeploymentRepository=local::default::file://`pwd`/target/staging-deploy
+          cp docs/target/antora.yml docs/src/antora.yml
+          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 $RELEASE_BRANCH_NAME
+
+      - name: Run JReleaser
+        uses: jreleaser/release-action@80ffb38fa759704eed4db5c7fcaae3ac1079473e # v2
+        env:
+          JRELEASER_DRY_RUN: ${{ github.event.inputs.dryRun }}
+          JRELEASER_PROJECT_VERSION: ${{ github.event.inputs.version }}
+          JRELEASER_GITHUB_TOKEN: ${{ secrets.JRELEASER_GITHUB_TOKEN }}
+          JRELEASER_GPG_PASSPHRASE: ${{ secrets.JRELEASER_GPG_PASSPHRASE }}
+          JRELEASER_GPG_PUBLIC_KEY: ${{ secrets.JRELEASER_GPG_PUBLIC_KEY }}
+          JRELEASER_GPG_SECRET_KEY: ${{ secrets.JRELEASER_GPG_SECRET_KEY }}
+          JRELEASER_MAVENCENTRAL_USERNAME: ${{ secrets.JRELEASER_MAVEN_CENTRAL_TOKEN_USER }}
+          JRELEASER_MAVENCENTRAL_PASSWORD: ${{ secrets.JRELEASER_MAVEN_CENTRAL_TOKEN }}
+
+      - name: JReleaser release output
+        uses: actions/upload-artifact@v7
+        if: always()
+        with:
+          name: jreleaser-release
+          path: |
+            out/jreleaser/trace.log
+            out/jreleaser/output.properties