Adding steps and env variables to build and publish to maven using gr…

…adle plugin (#979)

.github/workflows/publish-to-maven.yml

@@ -27,17 +27,20 @@ jobs:
 
     # CI release command defaults to publishSigned
     # Sonatype release command defaults to sonaTypeBundleRelease
-      - name: Gradle publish
-        run: gradle clean publish
+    # Changing env names as documented here - https://vanniktech.github.io/gradle-maven-publish-plugin/central/#secrets
+      - name: Gradle Build and Publish to Maven central
+        run: |
+          ./gradlew publish
+          ./gradlew closeAndReleaseRepository
         env:
-          PGP_PASSPHRASE: ${{ secrets.MAVEN_GPG_PASSPHRASE }}
-          PGP_SECRET: ${{ secrets.MAVEN_GPG_PRIVATE_KEY }}
-          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
-          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          ORG_GRADLE_PROJECT_signingInMemoryKeyPassword: ${{ secrets.MAVEN_GPG_PASSPHRASE }}
+          ORG_GRADLE_PROJECT_signingInMemoryKey: ${{ secrets.MAVEN_GPG_PRIVATE_KEY }}
+          ORG_GRADLE_PROJECT_mavenCentralPassword: ${{ secrets.SONATYPE_PASSWORD }}
+          ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.SONATYPE_USERNAME }}
 
     # Publish Released Fat Jar to Blob Storage 
       - name: Gradle build
-        run: |
+        run: |  
           ./gradlew build
           # remote folder for CI upload
           echo "CI_SPARK_REMOTE_JAR_FOLDER=feathr_jar_release" >> $GITHUB_ENV