Add github actions and spotless

.github/actions/build.yml

@@ -0,0 +1,103 @@
+name: Continous Integration
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+    tags: 'v[0-9]+.[0-9]+.[0-9]+'
+    paths-ignore:
+      - './idea'
+      - 'README.md'
+      - 'LICENSE'
+      - '.github/**'
+      - '!.github/workflows/**'
+
+env:
+  java: 1.8
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Java
+        uses: actions/setup-java@v1
+        with:
+          java-version: '${{ env.java }}'
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Cache Maven packages
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+      - name: Spotless
+        run: mvn -B spotless:check
+      - name: Build
+        run: mvn package -B -DskipTests=true
+      - name: Copy artifact
+        run: mkdir staging && cp target/*.jar staging
+      - name: Upload artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: plugin
+          path: staging
+
+  release:
+    needs: [build, test]
+    if: startsWith(github.ref, 'refs/tags/v')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get tag
+        id: get_version
+        run: echo ::set-output name=VERSION::$(echo $GITHUB_REF | cut -d / -f 3)
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ steps.get_version.outputs.VERSION }}
+          release_name: Release ${{ steps.get_version.outputs.VERSION }}
+          draft: false
+          prerelease: false
+      - name: Download pre-build artifact
+        uses: actions/download-artifact@v2
+        with:
+          name: plugin
+          path: staging
+      - name: Get artifact name
+        id: get_artifact_name
+        run: |
+          cd staging
+          echo ::set-output name=ARTIFACT::$(ls *.jar)
+      - name: Upload Release Asset
+        id: upload-release-asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: staging/${{ steps.get_artifact_name.outputs.ARTIFACT }}
+          asset_name: ${{ steps.get_artifact_name.outputs.ARTIFACT }}
+          asset_content_type: application/zip
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Java
+        uses: actions/setup-java@v1
+        with:
+          java-version: '${{ env.java }}'
+      - uses: actions/checkout@v2
+      - name: Cache Maven packages
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+      - name: Tests
+        run: mvn -B test

pom.xml

@@ -15,6 +15,7 @@
         <!-- Baseline Jenkins version you use to build the plugin. Users must have this version or newer to run. -->
         <jenkins.version>2.176.1</jenkins.version>
         <java.level>8</java.level>
+        <spotless.version>2.4.2</spotless.version>
         <!-- Other properties you may want to use:
           ~ jenkins-test-harness.version: Jenkins Test Harness version you use to test the plugin. For Jenkins version >= 1.580.1 use JTH 2.0 or higher.
           ~ hpi-plugin.version: The HPI Maven Plugin version used by the plugin..
@@ -105,6 +106,33 @@
         <url>https://github.com/jenkinsci/${project.artifactId}-plugin</url>
     </scm>
     -->
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>com.diffplug.spotless</groupId>
+                <artifactId>spotless-maven-plugin</artifactId>
+                <version>${spotless.version}</version>
+                <configuration>
+                    <!-- limit format enforcement to just the files changed by this feature branch -->
+                    <ratchetFrom>origin/master</ratchetFrom>
+                    <!-- define a language-specific format -->
+                    <java>
+                        <!-- These are the defaults, you can override if you want -->
+                        <includes>
+                            <include>src/main/java/**/*.java</include>
+                        </includes>
+                        <importOrder>  <!-- or a custom ordering -->
+                            <order>java,javax,org,com,de</order>
+                        </importOrder>
+                        <removeUnusedImports/>
+                        <eclipse>
+                            <file>${basedir}/spotless-style.xml</file> <!-- optional -->
+                        </eclipse>
+                    </java>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
     <repositories>
         <repository>
             <id>repo.jenkins-ci.org</id>