Prepare for Sonaype release

buildSrc/src/main/kotlin/buildsrc/conventions/kotlin-jvm.gradle.kts

@@ -1,6 +1,5 @@
 package buildsrc.conventions
 
-import org.gradle.kotlin.dsl.withType
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
@@ -14,6 +13,10 @@ kotlin {
     jvmToolchain(projectJvmVersion)
 }
 
+java {
+    withSourcesJar()
+}
+
 tasks.withType<KotlinCompile>().configureEach {
     kotlinOptions {
         jvmTarget = "$projectJvmVersion"

buildSrc/src/main/kotlin/buildsrc/conventions/maven-publish.gradle.kts

@@ -3,11 +3,36 @@ package buildsrc.conventions
 plugins {
     id("buildsrc.conventions.base")
     `maven-publish`
+    signing
 }
 
-publishing {
 
+val signingKeyId = providers.gradleProperty("signingKeyId")
+val signingPassword = providers.gradleProperty("signingPassword")
+val signingSecretKeyRingFile = providers.gradleProperty("signingSecretKeyRingFile")
+
+val signingPropertiesPresent = provider {
+    signingKeyId.isPresent && signingPassword.isPresent && signingSecretKeyRingFile.isPresent
+}
+
+val ossrhUsername = providers.gradleProperty("ossrhUsername")
+val ossrhPassword = providers.gradleProperty("ossrhPassword")
+
+val isSnapshotVersion = provider { version.toString().endsWith("SNAPSHOT") }
+
+
+val javadocJarStub by tasks.creating(Jar::class) {
+    group = JavaBasePlugin.DOCUMENTATION_GROUP
+    description = "Stub empty javadoc.jar artifact (a Javadoc jar is required by Maven Central)"
+    archiveClassifier.set("javadoc")
+}
+
+
+publishing {
     publications.withType<MavenPublication>().configureEach {
+
+        artifact(javadocJarStub)
+
         // apply default configs for all Maven publications
         pom {
             scm {
@@ -25,9 +50,30 @@ publishing {
         maven(rootProject.layout.buildDirectory.dir("maven-project-local")) {
             name = "MavenProjectLocal"
         }
+
+        if (ossrhUsername.isPresent && ossrhPassword.isPresent) {
+            maven("https://oss.sonatype.org/content/repositories/snapshots/") {
+                name = "SonartypeStaging"
+                credentials {
+                    username = ossrhUsername.get()
+                    password = ossrhPassword.get()
+                }
+            }
+
+            if (!isSnapshotVersion.get()) {
+                maven("https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
+                    name = "SonatypeProduction"
+                    credentials {
+                        username = ossrhUsername.get()
+                        password = ossrhPassword.get()
+                    }
+                }
+            }
+        }
     }
 }
 
+
 plugins.withType<JavaPlugin>().configureEach {
     // only create a Java publication when the Java plugin is applied
     publishing {
@@ -38,3 +84,23 @@ plugins.withType<JavaPlugin>().configureEach {
         }
     }
 }
+
+tasks.withType<AbstractPublishToMaven>().configureEach {
+    // Gradle warns about some signing tasks using publishing task outputs without explicit dependencies.
+    // Here's a quick fix.
+    dependsOn(tasks.withType<Sign>())
+    mustRunAfter(tasks.withType<Sign>())
+
+    doLast {
+        logger.lifecycle("[task: ${[email protected]}] ${publication.groupId}:${publication.artifactId}:${publication.version}")
+    }
+}
+
+signing {
+    if (signingPropertiesPresent.get()) {
+        logger.debug("[${project.displayName}] Signing is enabled")
+        useGpgCmd()
+        useInMemoryPgpKeys(signingKeyId.get(), signingPassword.get())
+        sign(publishing.publications)
+    }
+}