Setup publish.yml.

.github/workflows/publish.yml

@@ -0,0 +1,32 @@
+name: Publish package to the Maven Central Repository and GitHub Packages
+on:
+  release:
+    types: [created]
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - name: Cache Gradle packages
+        uses: actions/cache@v2
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
+          restore-keys: ${{ runner.os }}-gradle
+      - name: build
+        run: |
+          case "$GITHUB_REF" in
+          *-rc\.*)
+            echo "Publishing Release Candidate $GITHUB_REF"
+            ./gradlew --info --stacktrace -Psonatype.username=${{ secrets.ORG_SONATYPE_USERNAME }} -Psonatype.password=${{ secrets.ORG_SONATYPE_PASSWORD }} -Pbintray.user=${{ secrets.ORG_BINTRAY_USER }} -Pbintray.apiKey=${{ secrets.ORG_BINTRAY_KEY }} -Prelease.travisci=true -Prelease.useLastTag=true candidate
+            ;;
+          *)
+            echo "Publishing Final Release $GITHUB_REF"
+            ./gradlew --info --stacktrace -Psonatype.username=${{ secrets.ORG_SONATYPE_USERNAME }} -Psonatype.password=${{ secrets.ORG_SONATYPE_PASSWORD }} -Pbintray.user=${{ secrets.ORG_BINTRAY_USER }} -Pbintray.apiKey=${{ secrets.ORG_BINTRAY_KEY }} -Prelease.travisci=true -Prelease.useLastTag=true final
+            ;;
+          esac