Setup release workflow.

.github/workflows/release.yml

@@ -0,0 +1,34 @@
+name: Publish package to GitHub Packages
+
+on:
+  release:
+    types: [ created ]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: 'Checkout branch: ${{ github.REF }}.'
+        uses: actions/checkout@v2
+        with:
+          # Disabling shallow clone is recommended for improving relevancy of reporting.
+          fetch-depth: 0
+          ref: ${{ github.HEAD_REF }}
+      - name: 'Setup Java environment.'
+        uses: actions/setup-java@v2
+        with:
+          distribution: 'adopt'
+          java-version: 16
+          java-package: jdk
+      - name: 'Validate Gradle Wrapper'
+        uses: gradle/wrapper-validation-action@v1
+      - name: 'Publish package ${{ github.event.release.tag_name }}.'
+        run: |
+          sed -i "/^project_version=./c\project_version=$TAG" gradle.properties
+          ./gradlew --no-daemon --stacktrace publish
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TAG: ${{ github.event.release.tag_name }}

build.gradle

@@ -48,3 +48,21 @@ test {
     }
     ignoreFailures = true
 }
+
+publishing {
+    repositories {
+        maven {
+            name = 'GitHubPackages'
+            url = uri('https://maven.pkg.github.com/brtrndb/spring-boot-starter-nats')
+            credentials {
+                username = System.getenv("GITHUB_ACTOR")
+                password = System.getenv("GITHUB_TOKEN")
+            }
+        }
+    }
+    publications {
+        gpr(MavenPublication) {
+            from(components.java)
+        }
+    }
+}