build: Set sign task as dependency of publish tasks (#93)

buildSrc/src/main/kotlin/io/github/petertrr/PublishingConfiguration.kt

@@ -7,9 +7,11 @@ import org.gradle.api.publish.PublishingExtension
 import org.gradle.api.publish.maven.MavenPublication
 import org.gradle.api.publish.maven.plugins.MavenPublishPlugin
 import org.gradle.api.publish.maven.tasks.AbstractPublishToMaven
+import org.gradle.api.publish.maven.tasks.PublishToMavenRepository
 import org.gradle.api.tasks.bundling.Jar
 import org.gradle.kotlin.dsl.*
 import org.gradle.nativeplatform.platform.internal.DefaultNativePlatform
+import org.gradle.plugins.signing.Sign
 import org.gradle.plugins.signing.SigningExtension
 import org.gradle.plugins.signing.SigningPlugin
 
@@ -111,6 +113,12 @@ private fun Project.configureSigning() {
         logger.lifecycle("The following publications are getting signed: ${extensions.getByType<PublishingExtension>().publications.map { it.name }}")
         sign(*extensions.getByType<PublishingExtension>().publications.toTypedArray())
     }
+
+    tasks.withType<PublishToMavenRepository>().configureEach {
+        // We have a single Javadoc artifact shared by all platforms, hence all publications depend on signing of this artifact.
+        // This causes weird implicit dependencies, like `publishJsPublication...` depends on `signJvmPublication`.
+        dependsOn(tasks.withType<Sign>())
+    }
 }
 
 private fun Project.configureNexusPublishing() {