setup a generic deploy task

Author: pschichtel

.github/workflows/gradle.yml

@@ -25,7 +25,7 @@ jobs:
     - name: Setup Gradle
       uses: gradle/actions/setup-gradle@v3
     - name: Build
-      run: ./gradlew --no-configuration-cache --no-parallel publish "-PsonatypeUsername=$SONATYPE_USERNAME" "-PsonatypePassword=$SONATYPE_PASSWORD"
+      run: ./gradlew --no-configuration-cache --no-parallel mavenCentralDeploy "-PsonatypeUsername=$SONATYPE_USERNAME" "-PsonatypePassword=$SONATYPE_PASSWORD"
       env:
         SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
         SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}

build.gradle.kts

@@ -49,3 +49,16 @@ val testAll by tasks.registering(DefaultTask::class) {
             this@registering.dependsOn(it)
         }
 }
+
+val mavenCentralDeploy by tasks.registering(DefaultTask::class) {
+    group = "publishing"
+    val isSnapshot = project.version.toString().endsWith("-SNAPSHOT")
+
+    val publishTasks = subprojects
+        .flatMap { it.tasks.withType<PublishToMavenRepository>() }
+        .filter { it.repository.name == "sonatype" }
+    dependsOn(publishTasks)
+    if (!isSnapshot) {
+        dependsOn(tasks.closeAndReleaseStagingRepositories)
+    }
+}