AndroidPlugin is now a repo contributor.

src/main/kotlin/com/beust/kobalt/Main.kt

@@ -62,8 +62,20 @@ private class Main @Inject constructor(
 
     data class RunInfo(val jc: JCommander, val args: Args)
 
+    private fun addReposFromContributors(project: Project?) =
+        pluginInfo.repoContributors.forEach {
+            it.reposFor(project).forEach {
+                Kobalt.addRepo(it.toString())
+            }
+        }
+
     public fun run(jc: JCommander, args: Args) : Int {
 
+        //
+        // Add all the repos from repo contributors (at least those that return values without a Project)
+        //
+        addReposFromContributors(null)
+
         //
         // Add all the plugins read in plugin.xml to the Plugins singleton, so that code
         // in the build file that calls Plugins.findPlugin() can find them (code in the
@@ -153,6 +165,12 @@ private class Main @Inject constructor(
                     }
                 }
 
+                //
+                // Now that we have projects, add all the repos from repo contributors that need a Project
+                //
+                allProjects.forEach { addReposFromContributors(it) }
+
+                log(2, "Final list of repos:\n  " + Kobalt.repos.joinToString("\n  "))
                 if (args.tasks) {
                     //
                     // List of tasks

src/main/kotlin/com/beust/kobalt/api/Kobalt.kt

@@ -19,7 +19,7 @@ public class Kobalt {
             "https://jcenter.bintray.com/"
         )
 
-        val repos = ArrayList<String>(DEFAULT_REPOS)
+        val repos = HashSet<String>(DEFAULT_REPOS)
 
         fun addRepo(repo: String) = repos.add(if (repo.endsWith("/")) repo else repo + "/")
 

src/main/kotlin/com/beust/kobalt/api/KobaltPluginXml.kt

@@ -1,10 +1,10 @@
 package com.beust.kobalt.api
 
-import com.beust.kobalt.Plugins
 import com.beust.kobalt.maven.IClasspathDependency
 import java.io.File
 import java.io.InputStream
 import java.io.OutputStream
+import java.net.URI
 import javax.xml.bind.JAXBContext
 import javax.xml.bind.annotation.XmlElement
 import javax.xml.bind.annotation.XmlRootElement
@@ -62,6 +62,13 @@ interface IInitContributor {
     fun generateBuildFile(os: OutputStream)
 }
 
+/**
+ * Plugins that add their own repos.
+ */
+interface IRepoContributor {
+    fun reposFor(project: Project?) : List<URI>
+}
+
 /////
 // XML parsing
 //
@@ -89,6 +96,9 @@ class KobaltPluginXml {
 
     @XmlElement(name = "init-contributors") @JvmField
     var initClassName: ClassNameXml? = null
+
+    @XmlElement(name = "repo-contributors") @JvmField
+    var repoClassName: ClassNameXml? = null
 }
 
 class ContributorXml {
@@ -111,6 +121,7 @@ class PluginInfo(val xml: KobaltPluginXml) {
     val projectContributors = arrayListOf<IProjectContributor>()
     val classpathContributors = arrayListOf<IClasspathContributor>()
     val initContributors = arrayListOf<IInitContributor>()
+    val repoContributors = arrayListOf<IRepoContributor>()
 
     // Future contributors:
     // compilerArgs
@@ -158,6 +169,9 @@ class PluginInfo(val xml: KobaltPluginXml) {
         xml.initClassName?.className?.forEach {
             initContributors.add(factory.instanceOf(Class.forName(it)) as IInitContributor)
         }
+        xml.repoClassName?.className?.forEach {
+            repoContributors.add(factory.instanceOf(Class.forName(it)) as IRepoContributor)
+        }
     }
 }
 

src/main/kotlin/com/beust/kobalt/plugin/android/AndroidPlugin.kt

@@ -36,10 +36,16 @@ fun Project.android(init: AndroidConfig.() -> Unit) : AndroidConfig {
     return pd
 }
 
+val Project.isAndroid : Boolean
+        get() = (Kobalt.findPlugin("android") as AndroidPlugin).isAndroid(this)
+
 @Singleton
-public class AndroidPlugin @Inject constructor(val javaCompiler: JavaCompiler) : BasePlugin(), IClasspathContributor {
+public class AndroidPlugin @Inject constructor(val javaCompiler: JavaCompiler)
+        : BasePlugin(), IClasspathContributor, IRepoContributor {
     override val name = "android"
 
+    fun isAndroid(project: Project) = configurations[project.name] != null
+
     override fun apply(project: Project, context: KobaltContext) {
         super.apply(project, context)
         log(1, "Applying plug-in Android on project $project")
@@ -71,14 +77,18 @@ public class AndroidPlugin @Inject constructor(val javaCompiler: JavaCompiler) :
             return version as String
     }
 
-    fun androidHome(project: Project) : String {
-        var result = configurations[project.name]?.androidHome
-        if (result == null) {
-            result = System.getenv("ANDROID_HOME")
+    fun androidHome(project: Project?) : String {
+        var result = System.getenv("ANDROID_HOME")
+        if (project != null) {
+            configurations[project.name]?.androidHome?.let {
+                result = it
+            }
+        }
+
         if (result == null) {
             throw IllegalArgumentException("Neither androidHome nor \$ANDROID_HOME were defined")
         }
-        }
+
         return result
     }
 
@@ -242,6 +252,7 @@ public class AndroidPlugin @Inject constructor(val javaCompiler: JavaCompiler) :
 
     private val classpathEntries = HashMultimap.create<String, IClasspathDependency>()
 
+    // IClasspathContributor
     override fun entriesFor(project: Project?): Collection<IClasspathDependency> {
         if (project != null) {
             return classpathEntries.get(project.name) ?: listOf()
@@ -250,4 +261,7 @@ public class AndroidPlugin @Inject constructor(val javaCompiler: JavaCompiler) :
         }
     }
 
+    // IRepoContributor
+    override fun reposFor(project: Project?) =
+        listOf(Paths.get(KFiles.joinDir(androidHome(project), "extras", "android", "m2repository")).toUri())
 }

src/main/resources/META-INF/plugin.xml

@@ -22,4 +22,7 @@
         <class-name>com.beust.kobalt.plugin.java.JavaBuildGenerator</class-name>
         <class-name>com.beust.kobalt.plugin.kotlin.KotlinBuildGenerator</class-name>
     </init-contributors>
+    <repo-contributors>
+        <class-name>com.beust.kobalt.plugin.android.AndroidPlugin</class-name>
+    </repo-contributors>
 </kobalt-plugin>