[gradle-4.6] support publishing module metadata

Author: vvlevchenko

gradle/Bintray.gradle

@@ -11,8 +11,6 @@
  * See the License for the specific language governing permissions and limitations under the License.
  */
 
-import org.gradle.api.artifacts.repositories.MavenArtifactRepository
-import org.gradle.api.internal.Actions
 import org.gradle.api.internal.ClosureBackedAction
 
 class BintrayRepositoriesExtension {

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.3.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

src/main/groovy/com/jfrog/bintray/gradle/BintrayUploadTask.groovy

@@ -10,6 +10,7 @@ import org.gradle.api.file.CopySpec
 import org.gradle.api.publish.Publication
 import org.gradle.api.publish.PublishingExtension
 import org.gradle.api.publish.maven.MavenPublication
+import org.gradle.api.publish.maven.internal.publication.MavenPublicationInternal
 import org.gradle.api.tasks.Input
 import org.gradle.api.tasks.Optional
 import org.gradle.api.tasks.TaskAction
@@ -214,8 +215,8 @@ class BintrayUploadTask extends DefaultTask {
                 } else {
                     logger.error("{}: Could not find publication: {}.", path, it);
                 }
-            } else if (it instanceof MavenPublication) {
-                return collectArtifacts((MavenPublication) it)
+            } else if (it instanceof MavenPublicationInternal) {
+                return collectArtifacts((MavenPublicationInternal) it)
             } else {
                 logger.error("{}: Unsupported publication type: {}.", path, it.class)
             }
@@ -627,7 +628,7 @@ class BintrayUploadTask extends DefaultTask {
     }
 
     Artifact[] collectArtifacts(Publication publication) {
-        if (!publication instanceof MavenPublication) {
+        if (!publication instanceof MavenPublicationInternal) {
             logger.info "{} can only use maven publications - skipping {}.", path, publication.name
             return []
         }
@@ -647,6 +648,22 @@ class BintrayUploadTask extends DefaultTask {
             )
         }
 
+        def mavenPublication = (MavenPublicationInternal)publication
+        if (mavenPublication.canPublishModuleMetadata()) {
+            def moduleFile = mavenPublication.publishableFiles.find{ it.name == 'module.json'}
+            if (moduleFile != null) {
+                artifacts << new Artifact(
+                        name: identity.artifactId,
+                        groupId: identity.groupId,
+                        version: identity.version,
+                        extension: 'module',
+                        type: 'module',
+                        file: moduleFile
+                )
+            }
+        }
+
+
         // Add the pom file
         artifacts << new Artifact(
             name: identity.artifactId,