[MDEP-425] List plugin repositories via maven-artifact-transfer.

.gitignore

@@ -7,6 +7,7 @@ bin/
 # Intellij
 *.ipr
 *.iml
+*.versionsBackup
 .idea
 out/
 .DS_Store

pom.xml

@@ -254,7 +254,7 @@ under the License.
     <dependency>
       <groupId>org.apache.commons</groupId>
       <artifactId>commons-lang3</artifactId>
-      <version>3.6</version>
+      <version>3.8.1</version>
     </dependency>
 
     <dependency>

src/it/projects/list-plugin-repositories-verbose/invoker.properties

@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+invoker.goals = ${project.groupId}:${project.artifactId}:${project.version}:list-plugin-repositories
+invoker.debug = true

src/it/projects/list-plugin-repositories-verbose/pom.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements.  See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership.  The ASF licenses this file
+  ~ to you under the Apache License, Version 2.0 (the
+  ~ "License"); you may not use this file except in compliance
+  ~ with the License.  You may obtain a copy of the License at
+  ~
+  ~   http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing,
+  ~ software distributed under the License is distributed on an
+  ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  ~ KIND, either express or implied.  See the License for the
+  ~ specific language governing permissions and limitations
+  ~ under the License.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.its.dependency</groupId>
+  <artifactId>test</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <name>Test</name>
+  <description>
+    Test dependency:list-plugin-repositories
+  </description>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-project</artifactId>
+      <version>2.0.6</version>
+    </dependency>
+  </dependencies>
+
+</project>

src/it/projects/list-plugin-repositories-verbose/verify.groovy

@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+File file = new File( basedir, "build.log" );
+assert file.exists();
+
+String buildLog = file.getText( "UTF-8" );
+assert buildLog.contains( 'location: Maven settings (user/global)' );
+
+return true;

src/it/projects/list-plugin-repositories/invoker.properties

@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+invoker.goals = ${project.groupId}:${project.artifactId}:${project.version}:list-plugin-repositories
+invoker.debug = false

src/it/projects/list-plugin-repositories/pom.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements.  See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership.  The ASF licenses this file
+  ~ to you under the Apache License, Version 2.0 (the
+  ~ "License"); you may not use this file except in compliance
+  ~ with the License.  You may obtain a copy of the License at
+  ~
+  ~   http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing,
+  ~ software distributed under the License is distributed on an
+  ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  ~ KIND, either express or implied.  See the License for the
+  ~ specific language governing permissions and limitations
+  ~ under the License.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.its.dependency</groupId>
+  <artifactId>test</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <name>Test</name>
+  <description>
+    Test dependency:list-plugin-repositories
+  </description>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-project</artifactId>
+      <version>2.0.6</version>
+    </dependency>
+  </dependencies>
+
+</project>

src/it/projects/list-plugin-repositories/verify.groovy

@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+File file = new File( basedir, "build.log" );
+assert file.exists();
+
+String buildLog = file.getText( "UTF-8" );
+assert !buildLog.contains( 'location:' );
+
+return true;

src/main/java/org/apache/maven/plugins/dependency/AbstractDependencyMojo.java

@@ -90,6 +90,12 @@ public abstract class AbstractDependencyMojo
     @Parameter( defaultValue = "${project.remoteArtifactRepositories}", readonly = true, required = true )
     private List<ArtifactRepository> remoteRepositories;
 
+    /**
+     * Remote repositories which will be searched for plugins.
+     */
+    @Parameter( defaultValue = "${project.pluginArtifactRepositories}", readonly = true, required = true )
+    private List<ArtifactRepository> remotePluginRepositories;
+
     /**
      * Contains the full list of projects in the reactor.
      */
@@ -345,11 +351,25 @@ private void silenceUnarchiver( UnArchiver unArchiver )
      *         repositories, used to resolve artifacts.
      */
     public ProjectBuildingRequest newResolveArtifactProjectBuildingRequest()
+    {
+        return newProjectBuildingRequest( remoteRepositories );
+    }
+
+    /**
+     * @return Returns a new ProjectBuildingRequest populated from the current session and the current project remote
+     *         repositories, used to resolve plugins.
+     */
+    protected ProjectBuildingRequest newResolvePluginProjectBuildingRequest()
+    {
+        return newProjectBuildingRequest( remotePluginRepositories );
+    }
+
+    private ProjectBuildingRequest newProjectBuildingRequest( List<ArtifactRepository> repositories )
     {
         ProjectBuildingRequest buildingRequest =
             new DefaultProjectBuildingRequest( session.getProjectBuildingRequest() );
 
-        buildingRequest.setRemoteRepositories( remoteRepositories );
+        buildingRequest.setRemoteRepositories( repositories );
 
         return buildingRequest;
     }

src/main/java/org/apache/maven/plugins/dependency/GetMojo.java

@@ -65,15 +65,9 @@ public class GetMojo
     @Parameter( defaultValue = "${session}", required = true, readonly = true )
     private MavenSession session;
 
-    /**
-     *
-     */
     @Component
     private ArtifactResolver artifactResolver;
 
-    /**
-     *
-     */
     @Component
     private DependencyResolver dependencyResolver;