Automate snapshot publishing

.github/workflows/release.yml

@@ -0,0 +1,42 @@
+# This workflow will build a Java project with Gradle
+# For more information see: https://docs.github.com/en/enterprise-cloud@latest/actions/automating-builds-and-tests/building-and-testing-java-with-gradle
+
+name: Snapshot Release
+
+on:
+  push:
+    tags:
+      - v[0-9]+.[0-9]+.[0-9]+-SNAPSHOT
+      - v[0-9]+.[0-9]+.[0-9]+-[0-9a-zA-Z]+-SNAPSHOT
+      - v[0-9]+.[0-9]+.[0-9]+-[0-9a-zA-Z]+-[0-9a-zA-Z]+-SNAPSHOT
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Cancel previous workflow runs
+        uses: styfle/cancel-workflow-action@0.9.1
+        with:
+          access_token: ${{ github.token }}
+
+      - uses: actions/checkout@v2
+        with:
+         submodules: recursive
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+
+      - name: Decode & Generate Settings.xml file
+        run: echo $SETTINGS_FILE | base64 -di > ~/.m2/settings.xml
+        env:
+          SETTINGS_FILE: ${{ secrets.SETTINGS_XML }}
+
+      - name: Generate & upload library snapshot artifact JAR (Java Archive) file
+        run: mvn clean deploy -Dmaven.test.skip=true --no-transfer-progress
+
+      - name: Github Release
+        uses: softprops/action-gh-release@v1
+        with:
+          prerelease: ${{ contains(github.ref, '-alpha') || contains(github.ref, '-beta') }}