github action build image

.github/workflows/build-gradle-project.yml

@@ -0,0 +1,38 @@
+name: Build cassiopeia-data docker image
+
+on: 
+  push:
+
+jobs:
+  build-gradle-project:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get branch names
+        id: branch-names
+        uses: tj-actions/branch-names@v8
+
+      - name: Get current branch name
+        if: steps.branch-names.outputs.is_default == 'false'
+        run: |
+          echo "Running on branch: ${{ steps.branch-names.outputs.current_branch }}"
+      - name: Checkout project sources
+        uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          java-version: '8'
+          distribution: 'temurin'
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v2
+        with:
+          gradle-version: 7.4
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a
+        with:
+          username: ${{ secrets.ENV_DOCKER_USER }}
+          password: ${{ secrets.ENV_DOCKER_PASS }}
+
+      - name: Run build with Gradle Wrapper
+        run: |
+          ./gradlew build docker
+          docker push "kingstonduo/cassiopeia-data:${{ steps.branch-names.outputs.current_branch }}"

build.gradle

@@ -57,11 +57,21 @@ task unpack(type: Copy) {
 }
 
 def getTagInfo() {
-  if (project.hasProperty('tag')) {
-    def tagValue = project.property('tag')
-    return tagValue
-  } else {
-      return "latest"
+    if (project.hasProperty('tag')) {
+        def tagValue = project.property('tag')
+        return tagValue
+    } else {
+        def gitBranch = "Unknown branch"
+      try {
+        def workingDir = new File("${project.projectDir}")
+        def result = 'git rev-parse --abbrev-ref HEAD'.execute(null, workingDir)
+        result.waitFor()
+        if (result.exitValue() == 0) {
+            gitBranch = result.text.trim()
+        }
+      } catch (e) {
+        }
+        return gitBranch
     }
 }