Automate building with Maven action

.github/workflows/maven.yml

@@ -0,0 +1,53 @@
+# This workflow will build a Java project with Maven
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+
+name: Java CI with Maven
+
+on:
+  push:
+    tags:
+    - '*'
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - name: Get version information
+      id: version
+      uses: ncipollo/semantic-version-action@v1
+    - name: Set up JDK 8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 8
+    - name: Cache Maven packages
+      uses: actions/cache@v1
+      with:
+        path: ~/.m2
+        key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+        restore-keys: ${{ runner.os }}-m2
+    - name: Build with Maven
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: mvn -B package --file pom.xml
+    - run: mkdir staging && cp target/*.jar staging
+    - name: Generate release diff
+      env:
+        BEGIN_COMMIT: ${{ steps.version.outputs.previous_tag }}
+        END_COMMIT: ${{ steps.version.outputs.tag }}
+      run: git fetch --tags --force && git log --pretty=format:"* %s (%h)" ${BEGIN_COMMIT}..${END_COMMIT} > release_notes.md
+    - name: Create release
+      uses: ncipollo/release-action@v1
+      with:
+        artifacts: staging/*
+        allowUpdates: true
+        bodyFile: "release_notes.md"
+        draft: false
+        prerelease: false
+        token: ${{ secrets.GITHUB_TOKEN }}