Run the Gradle release task in the GitHub Actions workflow (#623)

Author: nakamura-to

.github/workflows/release.yml

@@ -0,0 +1,73 @@
+name: Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Release version'
+        required: false
+
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+ 
+    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@v3
+        if: github.event.inputs.version == null
+        id: candidate-version
+        with:
+          github-token: ${{secrets.GITHUB_TOKEN}}
+          result-encoding: string
+          script: |
+            const list = await github.repos.listReleases({
+              owner: "domaframework",
+              repo: "doma",
+            });
+            console.log(list)
+            return list.data[0].name
+
+      - name: Assign candidate version
+        if: github.event.inputs.version == null
+        run: echo "RELEASE_VERSION=${{ steps.candidate-version.outputs.result }}" >> $GITHUB_ENV
+
+      - name: Set up JDK 8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 8
+
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          token: ${{ secrets.WORKFLOW_DISPATCH_TOKEN }}
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Cache Gradle
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - name: Release ${{ env.RELEASE_VERSION }}
+        run: |
+          java -version
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          ./gradlew release -Prelease.releaseVersion=${{ env.RELEASE_VERSION }}
+
+      - name: Upload reports
+        if: failure()
+        uses: actions/upload-artifact@v2
+        with:
+          name: build
+          path: ./**/build/reports

RELEASE_OPERATIONS.md

@@ -1,31 +1,25 @@
 # Release Operations
 
-## Run the Gradle release task
+## Dispatch the release workflow
 
-The Gradle release task creates a release commit and push it to the origin/master branch.
+Dispatch the [release workflow](.github/workflows/release.yml) as follows:
 
 ```
-$ git checkout master
-$ git pull
-$ ./gradlew release -Prelease.releaseVersion=$(gh release list -L 1 | tee /dev/tty  | awk '{print $1}')
+$ gh api repos/domaframework/doma/actions/workflows/release.yml/dispatches -F ref='master'
 ```
 
-The value of `release.releaseVersion` is decided by the draft name of
-[Releases](https://github.com/domaframework/doma/releases).
-
 ## Build and Publish
 
 (No operation required)
 
-The GitHub Actions workflow [Java CI with Gradle](.github/workflows/ci.yml) handles the above push event.
-
-The workflow builds artifacts and publishes them to [Maven Central](https://repo1.maven.org/).
+The [ci workflow](.github/workflows/ci.yml) follows the above release workflow
+and publishes artifacts to [Maven Central](https://repo1.maven.org/).
 
 ## Wait for the artifacts to appear on Maven Central
 
 (Optional)
 
-Use [Dependency Watch](https://github.com/JakeWharton/dependency-watch).
+Use [Dependency Watch](https://github.com/JakeWharton/dependency-watch):
 
 ```
 $ dependency-watch await org.seasar.doma:doma-core:$(gh release list -L 1 | tee /dev/tty  | awk '{print $1}') && say "New version is available!"
@@ -54,6 +48,7 @@ and publish release notes.
 
 ## Announce the release
 
-Announce the release of new version using Twitter and Google Group.
-- [@domaframework](https://twitter.com/domaframework)
-- [doma-user](https://groups.google.com/g/doma-user)
+Announce the release of new version using
+[Twitter]((https://twitter.com/domaframework)),
+[Zulip](https://domaframework.zulipchat.com), and
+[Google Group](https://groups.google.com/g/doma-user).