merge workflows for build and publish

Author: danthe1st

.github/workflows/build.yml

@@ -21,3 +21,43 @@ jobs:
         run: ./gradlew build
       - name: Test with Gradle
         run: ./gradlew test
+
+  publish:
+    runs-on: ubuntu-latest
+    needs: build
+    env:
+      dockerhub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+    if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' && env.super_secret != '' }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up JDK 17
+        uses: actions/setup-java@v2
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+      - name: Build with Gradle
+        run: ./gradlew build
+      - name: Build JAR
+        run: ./gradlew shadowJar
+      - name: Build Docker image
+        run: docker build -t javabot .
+      - name: Tag docker image
+        run: |
+          docker tag javabot ${{ secrets.DOCKERHUB_USERNAME }}/${{ secrets.DOCKERHUB_REPONAME }}:${{ github.sha }}
+          docker tag javabot ${{ secrets.DOCKERHUB_USERNAME }}/${{ secrets.DOCKERHUB_REPONAME }}:latest
+        env:
+          dockerhub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+        if: env.dockerhub_username != null
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+        if: env.dockerhub_username != null
+      - name: Push to Docker Hub
+        run: docker push --all-tags ${{ secrets.DOCKERHUB_USERNAME }}/${{ secrets.DOCKERHUB_REPONAME }}
+        env:
+          dockerhub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+        if: env.dockerhub_username != null