Added more publish utilities for simplifying bintray configuration per project to reduced boilerplate.

gradle-plugins/publish-utils/src/main/groovy/net/corda/plugins/BintrayConfigExtension.groovy

@@ -0,0 +1,11 @@
+package net.corda.plugins
+
+class BintrayConfigExtension {
+    String user
+    String key
+    String repo
+    String org
+    String[] licenses
+    Boolean gpgSign
+    String gpgPassphrase
+}

gradle-plugins/publish-utils/src/main/groovy/net/corda/plugins/BintrayPublishExtension.groovy

@@ -0,0 +1,7 @@
+package net.corda.plugins
+
+class BintrayPublishExtension {
+    String name
+    Boolean dryRun
+    String[] publications
+}

gradle-plugins/publish-utils/src/main/groovy/net/corda/plugins/PublishTasks.groovy

@@ -7,17 +7,57 @@ import org.gradle.api.Project
 
 /**
  * A utility plugin that when applied will automatically create source and javadoc publishing tasks
+ * To apply this plugin you must also add 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.4' to your
+ * buildscript's classpath dependencies.
  */
 class PublishTasks implements Plugin<Project> {
     void apply(Project project) {
-        project.task("sourceJar", type: Jar, dependsOn: project.classes) {
-            classifier = 'sources'
-            from project.sourceSets.main.allSource
+        if(project.hasProperty('classes')) {
+            project.task("sourceJar", type: Jar, dependsOn: project.classes) {
+                classifier = 'sources'
+                from project.sourceSets.main.allSource
+            }
         }
 
-        project.task("javadocJar", type: Jar, dependsOn: project.javadoc) {
-            classifier = 'javadoc'
-            from project.javadoc.destinationDir
+        if(project.hasProperty('javadoc')) {
+            project.task("javadocJar", type: Jar, dependsOn: project.javadoc) {
+                classifier = 'javadoc'
+                from project.javadoc.destinationDir
+            }
+        }
+
+        project.extensions.create("bintrayConfig", BintrayConfigExtension)
+        project.extensions.create("bintrayPublish", BintrayPublishExtension)
+
+        def bintrayValues = project.extensions.findByName("bintrayPublish")
+        def bintrayConfig = project.rootProject.extensions.findByName('bintrayConfig')
+        if((bintrayConfig != null) && (bintrayValues != null)) {
+            // TODO AM:
+            // Problem 1. Bootstrapping - do not want root to depend on this project
+            // Problem 2. This project's extension is not available here
+            // Problem 3. Bintray's extension is already configured after evaluation
+            // Possible solutions:
+            // name: project.name
+            // publications: project.name (make it a forced convention)
+            // dryRun: move to root.
+            // Problem 4: Root project therefore cannot be published
+            // Solution: Why use this plugin if you only have a root project?
+            project.configure(project) {
+                apply plugin: 'com.jfrog.bintray'
+            }
+            def bintray = project.extensions.findByName("bintray")
+
+            project.logger.info("Configuring bintray for ${project.name}")
+            bintray.user = bintrayConfig.user
+            bintray.key = bintrayConfig.key
+            bintray.publications = bintrayValues.publications
+            bintray.dryRun = bintrayValues.dryRun ?: false
+            bintray.pkg.repo = bintrayConfig.repo
+            bintray.pkg.name = bintrayValues.name ?: project.name
+            bintray.pkg.userOrg = bintrayConfig.org
+            bintray.pkg.licenses = bintrayConfig.licenses
+            bintray.pkg.version.gpg.sign = bintrayConfig.gpgSign ?: false
+            bintray.pkg.version.gpg.passphrase = bintrayConfig.gpgPassphrase
         }
     }
 }