Add the release workflow file

Author: nakamura-to

.github/workflows/release.yml

@@ -0,0 +1,76 @@
+name: Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Release version'
+        required: false
+
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+ 
+    steps:
+      - name: Assign input version
+        if: github.event.inputs.version != null
+        run: echo "RELEASE_VERSION=${{ github.event.inputs.version }}" >> $GITHUB_ENV
+
+      - uses: actions/github-script@v7
+        if: github.event.inputs.version == null
+        id: candidate-version
+        with:
+          github-token: ${{secrets.GITHUB_TOKEN}}
+          result-encoding: string
+          script: |
+            const list = await github.rest.repos.listReleases({
+              owner: "domaframework",
+              repo: "doma-codegen-plugin",
+            });
+            console.log(list)
+            let version = list.data[0].name
+            return version.startsWith("v") ? version.substring(1) : version
+
+      - name: Assign candidate version
+        if: github.event.inputs.version == null
+        run: echo "RELEASE_VERSION=${{ steps.candidate-version.outputs.result }}" >> $GITHUB_ENV
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'zulu'
+          java-version: 21
+
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.REPO_ACCESS_TOKEN }}
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - name: Release ${{ env.RELEASE_VERSION }}
+        run: |
+          java -version
+          git config --local user.email "[email protected]"
+          git config --local user.name "GitHub Action"
+          ./gradlew release -Prelease.releaseVersion=${{ env.RELEASE_VERSION }}
+
+      - name: Upload reports
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: build
+          path: ./**/build/reports