Release workflow

.github/workflows/maven-release.yml

@@ -0,0 +1,72 @@
+# This release process looks for tags and produces releases.
+name: Release
+
+on:
+  push:
+    tags:
+      - 'go-maven-poller-[0-9]+*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    outputs:
+      version: ${{ steps.version.outputs.version }}
+      md5sum: ${{ steps.md5sum.outputs.md5sum }}
+      sha256sum: ${{ steps.sha256sum.outputs.sha256sum }}
+    env:
+      DEBIAN_FRONTEND: noninteractive
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 8
+    - name: Build with Maven
+      run: mvn -B package --file pom.xml
+    - name: Extract current maven version
+      run: echo "::set-output name=version::$(mvn org.apache.maven.plugins:maven-help-plugin:3.1.0:evaluate -Dexpression=project.version -q -DforceStdout)"
+      id: version
+      shell: bash
+    - name: Calculate MD5
+      run: echo "::set-output name=md5sum::$(md5sum -b target/go-maven-poller-plugin.jar | cut -f1 -d" ")"
+      id: md5sum
+      shell: bash
+    - name: Calculate SHA256
+      run: echo "::set-output name=sha256sum::$(sha256sum -b target/go-maven-poller-plugin.jar | cut -f1 -d" ")"
+      id: sha256sum
+      shell: bash
+    - uses: actions/upload-artifact@v2
+      with:
+        name: go-maven-poller-plugin.jar
+        path: target/go-maven-poller-plugin.jar
+    - uses: actions/create-release@v1
+      id: create_release
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        tag_name: ${{ github.ref }}
+        release_name: ${{ github.ref }}
+        draft: true
+        body: |
+          # Release ${{ steps.version.outputs.version }}
+          ## Changes
+          
+          * 1
+          * 2
+          * 3
+
+          ## Checksums
+          |Type|Message digest|
+          |----|--------------|
+          |MD5|`${{ steps.md5sum.outputs.md5sum }}`|
+          |SHA256|`${{ steps.sha256sum.outputs.sha256sum }}`|
+
+    - uses: actions/upload-release-asset@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        upload_url: ${{ steps.create_release.outputs.upload_url }}
+        asset_path: target/go-maven-poller-plugin.jar
+        asset_name: go-maven-poller-plugin.jar
+        asset_content_type: application/java-archive