update workflow

Author: Robert Schuh

.github/workflows/publish.yaml

@@ -0,0 +1,68 @@
+name: Publish to Maven Central
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  publish:
+    name: Publish Release Artifacts
+    runs-on: ubuntu-latest
+    
+    steps:
+      # Step 1
+      # This is optional and only if you want to set the timezone
+      - name: Setup timezone
+        run: |
+          sudo timedatectl set-timezone Europe/Berlin
+          timedatectl
+      # Step 2
+      # Reguired step 
+      - name: Check out the repo
+        uses: actions/checkout@v3
+      
+      # Step 3
+      # Optional step 
+      - name: Validate Gradle wrapper
+        uses: gradle/wrapper-validation-action@v1
+
+      # Step 4
+      # Reguired step
+      - name: Set up Java 8 JDK
+        uses: actions/setup-java@v2
+        with:
+          java-version: '8'
+          distribution: 'temurin'
+          architecture: x64
+          cache: 'gradle'
+          check-latest: true
+
+      # Step 5
+      # Optional step, but recommended as user often commit the gradle wrapper jar without exevute permissions.
+      - name: Change wrapper permissions
+        run: chmod +x ./gradlew
+
+      # Step 6
+      # Reguired step 
+      - name: Decode GPG Key
+        run: |
+          mkdir -p ~/.gradle/
+          echo "${{secrets.OSSRH_GPG_SECRET_KEY}}" > ~/.gradle/secring.gpg.b64
+          base64 -d ~/.gradle/secring.gpg.b64 > ~/.gradle/secring.gpg
+      # Step 7
+      # Obviously reguired step 
+      - name: Publish package
+        # wraped the signing.password with single quotes as the password could contain special characters
+        run: ./gradlew publish -Psigning.keyId=${{secrets.OSSRH_GPG_SECRET_KEY_ID}} -Psigning.password='${{secrets.OSSRH_GPG_SECRET_KEY_PASSWORD}}' -Psigning.secretKeyRingFile=$(echo ~/.gradle/secring.gpg) --warn --stacktrace
+        env:
+          MAVEN_USERNAME: ${{secrets.OSSRH_USERNAME}}
+          MAVEN_PASSWORD: ${{secrets.OSSRH_PASSWORD}}
+
+      # Step 8
+      # Optional step, will enable you to see what you have released as well here on GitHub 
+      - name: Upload Artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: release-build-libs
+          path: build/libs
+          retention-days: 3