Add GitHub workflow for deploying plugin site

Author: Marcono1234

.github/workflows/maven.yml

@@ -9,9 +9,11 @@ on:
   pull_request:
     branches: [ master ]
 
+permissions:
+  contents: read #  to fetch code (actions/checkout)
+
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
@@ -22,5 +24,10 @@ jobs:
         java-version: '11'
         distribution: 'adopt'
         cache: maven
+
     - name: Build with Maven
-      run: mvn -B verify -P=integration-test
+      run: mvn --batch-mode --no-transfer-progress verify -P=integration-test
+
+    # Always build plugin site (but don't publish), to make sure build works
+    - name: Build plugin site
+      run: mvn --batch-mode --no-transfer-progress site

.github/workflows/site.yml

@@ -0,0 +1,50 @@
+name: Publish plugin site
+
+on:
+  release:
+    types: [published]
+  # Support manually triggering this workflow from GitHub UI
+  workflow_dispatch:
+
+jobs:
+  build-site:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read #  to fetch code (actions/checkout)
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 11
+      uses: actions/setup-java@v4
+      with:
+        java-version: "11"
+        distribution: "adopt"
+        cache: maven
+
+    - name: Build site
+      run: mvn --batch-mode --no-transfer-progress site
+
+    - name: Upload site files as artifact
+      id: deployment
+      uses: actions/upload-pages-artifact@v3
+      with:
+        path: target/site
+
+  # See https://github.com/actions/deploy-pages
+  deploy-site:
+    needs: build-site
+
+    permissions:
+      pages: write
+      id-token: write
+
+    # Deploy to the github-pages environment
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4