Refactor ProtobufPlugin to support multiple languages

README.md

@@ -437,4 +437,4 @@ Tools](https://developer.android.com/sdk/index.html#Other).
 After you made any change to the plugin, be sure to run these tests.
 ```
 $ ./gradlew test
-```
+```

src/main/groovy/com/google/protobuf/gradle/ProtobufConfigurator.groovy

@@ -31,7 +31,6 @@ package com.google.protobuf.gradle
 
 import org.gradle.api.NamedDomainObjectContainer
 import org.gradle.api.Project
-import org.gradle.api.internal.file.FileResolver
 import org.gradle.api.tasks.SourceSet
 import org.gradle.util.ConfigureUtil
 
@@ -50,12 +49,12 @@ public class ProtobufConfigurator {
    */
   public String generatedFilesBaseDir
 
-  public ProtobufConfigurator(Project project, FileResolver fileResolver) {
+  public ProtobufConfigurator(Project project) {
     this.project = project
     if (Utils.isAndroidProject(project)) {
       tasks = new AndroidGenerateProtoTaskCollection()
     } else {
-      tasks = new JavaGenerateProtoTaskCollection()
+      tasks = new DefaultGenerateProtoTaskCollection()
     }
     tools = new ToolsLocator(project)
     taskConfigClosures = new ArrayList()
@@ -150,7 +149,7 @@ public class ProtobufConfigurator {
     }
   }
 
-  public class JavaGenerateProtoTaskCollection
+  public class DefaultGenerateProtoTaskCollection
       extends GenerateProtoTaskCollection {
     public Collection<GenerateProtoTask> ofSourceSet(String sourceSet) {
       return all().findAll { task ->

src/main/groovy/com/google/protobuf/gradle/ProtobufConvention.groovy

@@ -33,15 +33,14 @@ package com.google.protobuf.gradle
 import com.google.common.collect.ArrayListMultimap
 import com.google.common.collect.Multimap
 import org.gradle.api.Project
-import org.gradle.api.internal.file.FileResolver
 import org.gradle.util.ConfigureUtil
 
 /**
  * Adds the protobuf {} block as a property of the project.
  */
 class ProtobufConvention {
-    def ProtobufConvention(Project project, FileResolver fileResolver) {
-        protobuf = new ProtobufConfigurator(project, fileResolver)
+    def ProtobufConvention(Project project) {
+        protobuf = new ProtobufConfigurator(project)
     }
 
     def final ProtobufConfigurator protobuf