add workflow action to publish to maven central via github actions

Author: osiegmar

.github/workflows/release.yml

@@ -0,0 +1,32 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+# GitHub recommends pinning actions to a commit SHA.
+# To get a newer version, you will need to update the SHA.
+# You can also reference a tag or branch, but the action may change without warning.
+
+name: Publish package to the Maven Central Repository
+on:
+  release:
+    types: [created]
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '21'
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@d156388eb19639ec20ade50009f3d199ce1e2808 # v4.1.0
+      - name: Publish package
+        run: ./gradlew publish
+        env:
+          ORG_GRADLE_PROJECT_signingKey: ${{ secrets.GPG_SIGNING_KEY }}
+          ORG_GRADLE_PROJECT_signingPassword: ${{ secrets.GPG_SIGNING_PASSPHRASE }}
+          ORG_GRADLE_PROJECT_ossrhUsername: ${{ secrets.OSSRH_USERNAME }}
+          ORG_GRADLE_PROJECT_ossrhPassword: ${{ secrets.OSSRH_TOKEN }}

lib/build.gradle.kts

@@ -182,5 +182,8 @@ publishing {
 }
 
 signing {
+    val signingKey: String? by project
+    val signingPassword: String? by project
+    useInMemoryPgpKeys(signingKey, signingPassword)
     sign(publishing.publications["maven"])
 }