Merge branch 'trunk' into eclipse-aether

Conflicts:
	maven-aether-provider/src/main/java/org/apache/maven/repository/internal/DefaultArtifactDescriptorReader.java
	maven-aether-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionRangeResolver.java
	maven-aether-provider/src/main/java/org/apache/maven/repository/internal/DefaultVersionResolver.java
	maven-aether-provider/src/test/java/org/apache/maven/repository/internal/AbstractRepositoryTestCase.java
	maven-aether-provider/src/test/java/org/apache/maven/repository/internal/DefaultVersionResolverTest.java
	maven-core/src/main/java/org/apache/maven/DefaultMaven.java
	maven-core/src/main/java/org/apache/maven/plugin/internal/DefaultLegacySupport.java
	maven-core/src/main/java/org/apache/maven/plugin/prefix/PluginPrefixResult.java
	maven-embedder/src/main/java/org/apache/maven/cli/transfer/Slf4jMavenTransferListener.java
	pom.xml
	src/site/site.xml

.gitattributes

@@ -1,2 +1,8 @@
-*.jar              -text -crlf
+# Auto detect text files and perform LF normalization
-*.graffle          -text -crlf
+*        text=auto
+
+*.java   text diff=java
+*.html   text diff=html
+*.css    text
+*.js     text
+*.sql    text

.gitignore

@@ -13,3 +13,5 @@ bin/
 >>>>>>> 4fdcdbd26244ff81e242054fd38cf415d92499be
 
 .DS_Store
+/bootstrap
+/dependencies.xml

apache-maven/NOTICE.txt

@@ -5,7 +5,7 @@
    =========================================================================
 
 Apache Maven
-Copyright 2001-2011 The Apache Software Foundation
+Copyright 2001-2012 The Apache Software Foundation
 
 This product includes software developed by
 The Apache Software Foundation (http://www.apache.org/).

apache-maven/README.txt

@@ -40,18 +40,18 @@
   1) Unpack the archive where you would like to store the binaries, eg:
 
     Unix-based Operating Systems (Linux, Solaris and Mac OS X)
-      tar zxvf apache-maven-3.0.x.tar.gz
+      tar zxvf apache-maven-3.x.y.tar.gz
     Windows 2000/XP
-      unzip apache-maven-3.0.x.zip
+      unzip apache-maven-3.x.y.zip
 
-  2) A directory called "apache-maven-3.0.x" will be created.
+  2) A directory called "apache-maven-3.x.y" will be created.
 
   3) Add the bin directory to your PATH, eg:
 
     Unix-based Operating Systems (Linux, Solaris and Mac OS X)
-      export PATH=/usr/local/apache-maven-3.0.x/bin:$PATH
+      export PATH=/usr/local/apache-maven-3.x.y/bin:$PATH
     Windows 2000/XP
-      set PATH="c:\program files\apache-maven-3.0.x\bin";%PATH%
+      set PATH="c:\program files\apache-maven-3.x.y\bin";%PATH%
 
   4) Make sure JAVA_HOME is set to the location of your JDK
 
@@ -71,7 +71,7 @@
   Downloads:          http://maven.apache.org/download.html
   Release Notes:      http://maven.apache.org/release-notes.html
   Mailing Lists:      http://maven.apache.org/mail-lists.html
-  Source Code:        http://svn.apache.org/repos/asf/maven/
+  Source Code:        https://git-wip-us.apache.org/repos/asf/maven.git/apache-maven
   Issue Tracking:     http://jira.codehaus.org/browse/MNG
-  Wiki:               http://docs.codehaus.org/display/MAVENUSER/
+  Wiki:               https://cwiki.apache.org/confluence/display/MAVEN/
   Available Plugins:  http://maven.apache.org/plugins/index.html

build.xml

@@ -36,6 +36,9 @@ END SNIPPET: ant-bootstrap -->
   <property name="distributionShortName" value="Maven"/>
   <property name="distributionName" value="Apache Maven"/>
   <property name="it.workdir.version" value="3.0.x" />
+  <property name="maven-compile.jvmargs" value="-Xmx512m -Xms512m"/>
+  <property name="maven-compile.fork" value="true"/>
+  <property name="maven-compile.maxmemory" value="512m"/>
 
   <target name="initTaskDefs">
     <echo>Building ${distributionName} ...</echo>
@@ -247,8 +250,9 @@ Do you want to continue?</input>
   </target>
 
   <target name="maven-compile" depends="compile-boot,process-classes" description="compiles Maven using the bootstrap Maven, skipping automated tests">
-    <java fork="true" classname="org.apache.maven.cli.MavenCli" failonerror="true">
+    <java fork="${maven-compile.fork}" classname="org.apache.maven.cli.MavenCli" failonerror="true" timeout="600000"  maxmemory="${maven-compile.maxmemory}">
       <!--jvmarg line="-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000"/-->
+      <!--jvmarg value="${maven-compile.jvmargs}"/-->
       <classpath refid="maven.classpath" />
       <arg value="${maven.debug}" />
       <arg value="-B" />

maven-aether-provider/src/main/java/org/apache/maven/repository/internal/MavenMetadata.java

@@ -45,6 +45,8 @@ abstract class MavenMetadata
     implements MergeableMetadata
 {
 
+    static final String MAVEN_METADATA_XML = "maven-metadata.xml";
+
     private final File file;
 
     protected Metadata metadata;
@@ -59,7 +61,7 @@ protected MavenMetadata( Metadata metadata, File file )
 
     public String getType()
     {
-        return "maven-metadata.xml";
+        return MAVEN_METADATA_XML;
     }
 
     public File getFile()
@@ -86,7 +88,7 @@ public boolean isMerged()
 
     protected abstract void merge( Metadata recessive );
 
-    private Metadata read( File metadataFile )
+    static Metadata read( File metadataFile )
         throws RepositoryException
     {
         if ( metadataFile.length() <= 0 )

maven-aether-provider/src/main/java/org/apache/maven/repository/internal/MavenSnapshotMetadata.java

@@ -0,0 +1,100 @@
+package org.apache.maven.repository.internal;
+
+/*
+ * 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.
+ */
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Collection;
+
+import org.apache.maven.artifact.repository.metadata.Metadata;
+import org.eclipse.aether.artifact.Artifact;
+
+/**
+ * @author Hervé Boutemy
+ */
+abstract class MavenSnapshotMetadata
+    extends MavenMetadata
+{
+    static final String SNAPSHOT = "SNAPSHOT";
+
+    protected final Collection<Artifact> artifacts = new ArrayList<Artifact>();
+
+    protected final boolean legacyFormat;
+
+    protected MavenSnapshotMetadata( Metadata metadata, File file, boolean legacyFormat )
+    {
+        super( metadata, file );
+        this.legacyFormat = legacyFormat;
+    }
+
+    protected static Metadata createRepositoryMetadata( Artifact artifact, boolean legacyFormat )
+    {
+        Metadata metadata = new Metadata();
+        if ( !legacyFormat )
+        {
+            metadata.setModelVersion( "1.1.0" );
+        }
+        metadata.setGroupId( artifact.getGroupId() );
+        metadata.setArtifactId( artifact.getArtifactId() );
+        metadata.setVersion( artifact.getBaseVersion() );
+
+        return metadata;
+    }
+
+    public void bind( Artifact artifact )
+    {
+        artifacts.add( artifact );
+    }
+
+    public Object getKey()
+    {
+        return getGroupId() + ':' + getArtifactId() + ':' + getVersion();
+    }
+
+    public static Object getKey( Artifact artifact )
+    {
+        return artifact.getGroupId() + ':' + artifact.getArtifactId() + ':' + artifact.getBaseVersion();
+    }
+
+    protected String getKey( String classifier, String extension )
+    {
+        return classifier + ':' + extension;
+    }
+
+    public String getGroupId()
+    {
+        return metadata.getGroupId();
+    }
+
+    public String getArtifactId()
+    {
+        return metadata.getArtifactId();
+    }
+
+    public String getVersion()
+    {
+        return metadata.getVersion();
+    }
+
+    public Nature getNature()
+    {
+        return Nature.SNAPSHOT;
+    }
+}

maven-aether-provider/src/main/java/org/apache/maven/repository/internal/RemoteSnapshotMetadata.java

@@ -23,7 +23,6 @@
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.Date;
 import java.util.LinkedHashMap;
 import java.util.Map;
@@ -39,46 +38,19 @@
  * @author Benjamin Bentmann
  */
 final class RemoteSnapshotMetadata
-    extends MavenMetadata
+    extends MavenSnapshotMetadata
 {
 
-    private static final String SNAPSHOT = "SNAPSHOT";
-
-    private final Collection<Artifact> artifacts = new ArrayList<Artifact>();
-
     private final Map<String, SnapshotVersion> versions = new LinkedHashMap<String, SnapshotVersion>();
 
-    private final boolean legacyFormat;
-
     public RemoteSnapshotMetadata( Artifact artifact, boolean legacyFormat )
     {
-        super( createMetadata( artifact, legacyFormat ), null );
+        super( createRepositoryMetadata( artifact, legacyFormat ), null, legacyFormat );
-        this.legacyFormat = legacyFormat;
     }
 
     private RemoteSnapshotMetadata( Metadata metadata, File file, boolean legacyFormat )
     {
-        super( metadata, file );
+        super( metadata, file, legacyFormat );
-        this.legacyFormat = legacyFormat;
-    }
-
-    private static Metadata createMetadata( Artifact artifact, boolean legacyFormat )
-    {
-        Metadata metadata = new Metadata();
-        if ( !legacyFormat )
-        {
-            metadata.setModelVersion( "1.1.0" );
-        }
-        metadata.setGroupId( artifact.getGroupId() );
-        metadata.setArtifactId( artifact.getArtifactId() );
-        metadata.setVersion( artifact.getBaseVersion() );
-
-        return metadata;
-    }
-
-    public void bind( Artifact artifact )
-    {
-        artifacts.add( artifact );
     }
 
     public MavenMetadata setFile( File file )
@@ -86,16 +58,6 @@ public MavenMetadata setFile( File file )
         return new RemoteSnapshotMetadata( metadata, file, legacyFormat );
     }
 
-    public Object getKey()
-    {
-        return getGroupId() + ':' + getArtifactId() + ':' + getVersion();
-    }
-
-    public static Object getKey( Artifact artifact )
-    {
-        return artifact.getGroupId() + ':' + artifact.getArtifactId() + ':' + artifact.getBaseVersion();
-    }
-
     public String getExpandedVersion( Artifact artifact )
     {
         String key = getKey( artifact.getClassifier(), artifact.getExtension() );
@@ -136,7 +98,7 @@ protected void merge( Metadata recessive )
 
             if ( version.endsWith( SNAPSHOT ) )
             {
-                String qualifier = snapshot.getTimestamp() + "-" + snapshot.getBuildNumber();
+                String qualifier = snapshot.getTimestamp() + '-' + snapshot.getBuildNumber();
                 version = version.substring( 0, version.length() - SNAPSHOT.length() ) + qualifier;
             }
 
@@ -145,6 +107,7 @@ protected void merge( Metadata recessive )
             sv.setExtension( artifact.getExtension() );
             sv.setVersion( version );
             sv.setUpdated( lastUpdated );
+
             versions.put( getKey( sv.getClassifier(), sv.getExtension() ), sv );
         }
 
@@ -169,11 +132,6 @@ protected void merge( Metadata recessive )
         }
     }
 
-    private String getKey( String classifier, String extension )
-    {
-        return classifier + ':' + extension;
-    }
-
     private static int getBuildNumber( Metadata metadata )
     {
         int number = 0;
@@ -191,24 +149,4 @@ private static int getBuildNumber( Metadata metadata )
         return number;
     }
 
-    public String getGroupId()
-    {
-        return metadata.getGroupId();
-    }
-
-    public String getArtifactId()
-    {
-        return metadata.getArtifactId();
-    }
-
-    public String getVersion()
-    {
-        return metadata.getVersion();
-    }
-
-    public Nature getNature()
-    {
-        return Nature.SNAPSHOT;
-    }
-
 }

maven-aether-provider/src/main/java/org/apache/maven/repository/internal/VersionsMetadata.java

@@ -40,18 +40,22 @@ final class VersionsMetadata
 
     public VersionsMetadata( Artifact artifact )
     {
-        super( createMetadata( artifact ), null );
+        super( createRepositoryMetadata( artifact ), null );
         this.artifact = artifact;
     }
 
     public VersionsMetadata( Artifact artifact, File file )
     {
-        super( createMetadata( artifact ), file );
+        super( createRepositoryMetadata( artifact ), file );
         this.artifact = artifact;
     }
 
-    private static Metadata createMetadata( Artifact artifact )
+    private static Metadata createRepositoryMetadata( Artifact artifact )
     {
+        Metadata metadata = new Metadata();
+        metadata.setGroupId( artifact.getGroupId() );
+        metadata.setArtifactId( artifact.getArtifactId() );
+
         Versioning versioning = new Versioning();
         versioning.addVersion( artifact.getBaseVersion() );
         if ( !artifact.isSnapshot() )
@@ -63,10 +67,7 @@ private static Metadata createMetadata( Artifact artifact )
             versioning.setLatest( artifact.getBaseVersion() );
         }
 
-        Metadata metadata = new Metadata();
         metadata.setVersioning( versioning );
-        metadata.setGroupId( artifact.getGroupId() );
-        metadata.setArtifactId( artifact.getArtifactId() );
 
         return metadata;
     }

maven-artifact/src/main/java/org/apache/maven/artifact/Artifact.java

@@ -32,6 +32,10 @@
 import org.apache.maven.artifact.versioning.OverConstrainedVersionException;
 import org.apache.maven.artifact.versioning.VersionRange;
 
+/**
+ * Maven Artifact interface. Notice that it mixes artifact definition concepts (groupId, artifactId, version)
+ * with dependency information (version range, scope). 
+ */
 public interface Artifact
     extends Comparable<Artifact>
 {

maven-artifact/src/main/java/org/apache/maven/artifact/repository/ArtifactRepositoryPolicy.java

@@ -21,7 +21,6 @@
 
 import java.util.Calendar;
 import java.util.Date;
-import java.util.TimeZone;
 
 /**
  * Describes a set of policies for a repository to use under certain conditions.

maven-artifact/src/main/java/org/apache/maven/artifact/versioning/ComparableVersion.java

@@ -69,9 +69,9 @@ public class ComparableVersion
 
     private interface Item
     {
-        final int INTEGER_ITEM = 0;
+        int INTEGER_ITEM = 0;
-        final int STRING_ITEM = 1;
+        int STRING_ITEM = 1;
-        final int LIST_ITEM = 2;
+        int LIST_ITEM = 2;
 
         int compareTo( Item item );
 
@@ -86,7 +86,7 @@ private interface Item
     private static class IntegerItem
         implements Item
     {
-    	private static final BigInteger BigInteger_ZERO = new BigInteger( "0" );
+        private static final BigInteger BIG_INTEGER_ZERO = new BigInteger( "0" );
 
         private final BigInteger value;
 
@@ -94,7 +94,7 @@ private static class IntegerItem
 
         private IntegerItem()
         {
-            this.value = BigInteger_ZERO;
+            this.value = BIG_INTEGER_ZERO;
         }
 
         public IntegerItem( String str )
@@ -109,14 +109,14 @@ public int getType()
 
         public boolean isNull()
         {
-            return BigInteger_ZERO.equals( value );
+            return BIG_INTEGER_ZERO.equals( value );
         }
 
         public int compareTo( Item item )
         {
             if ( item == null )
             {
-                return BigInteger_ZERO.equals( value ) ? 0 : 1; // 1.0 == 1, 1.1 > 1
+                return BIG_INTEGER_ZERO.equals( value ) ? 0 : 1; // 1.0 == 1, 1.1 > 1
             }
 
             switch ( item.getType() )
@@ -266,7 +266,7 @@ public boolean isNull()
 
         void normalize()
         {
-            for( ListIterator<Item> iterator = listIterator( size() ); iterator.hasPrevious(); )
+            for ( ListIterator<Item> iterator = listIterator( size() ); iterator.hasPrevious(); )
             {
                 Item item = iterator.previous();
                 if ( item.isNull() )
@@ -327,7 +327,7 @@ public int compareTo( Item item )
         public String toString()
         {
             StringBuilder buffer = new StringBuilder( "(" );
-            for( Iterator<Item> iter = iterator(); iter.hasNext(); )
+            for ( Iterator<Item> iter = iterator(); iter.hasNext(); )
             {
                 buffer.append( iter.next() );
                 if ( iter.hasNext() )

maven-artifact/src/main/java/org/apache/maven/artifact/versioning/DefaultArtifactVersion.java

@@ -72,7 +72,7 @@ public int compareTo( ArtifactVersion otherVersion )
     {
         if ( otherVersion instanceof DefaultArtifactVersion )
         {
-            return this.comparable.compareTo( ( (DefaultArtifactVersion) otherVersion).comparable );
+            return this.comparable.compareTo( ( (DefaultArtifactVersion) otherVersion ).comparable );
         }
         else
         {

maven-compat/src/main/java/org/apache/maven/artifact/repository/metadata/DefaultRepositoryMetadataManager.java

@@ -1,18 +1,22 @@
 package org.apache.maven.artifact.repository.metadata;
 
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * Licensed to the Apache Software Foundation (ASF) under one
- * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * or more contributor license agreements.  See the NOTICE file
- * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * distributed with this work for additional information
- * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * regarding copyright ownership.  The ASF licenses this file
- * copy of the License at
+ * 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
+ * Unless required by applicable law or agreed to in writing,
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * software distributed under the License is distributed on an
- * or implied. See the License for the specific language governing permissions and limitations under
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * the License.
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
 import java.io.File;
@@ -47,7 +51,7 @@
 /**
  * @author Jason van Zyl
  */
-@Component(role=RepositoryMetadataManager.class)
+@Component( role = RepositoryMetadataManager.class )
 public class DefaultRepositoryMetadataManager
     extends AbstractLogEnabled
     implements RepositoryMetadataManager

maven-compat/src/main/java/org/apache/maven/artifact/repository/metadata/MetadataBridge.java

@@ -26,7 +26,6 @@
 import org.apache.maven.artifact.metadata.ArtifactMetadata;
 import org.apache.maven.artifact.repository.ArtifactRepository;
 import org.apache.maven.artifact.repository.DefaultArtifactRepository;
-import org.apache.maven.artifact.repository.metadata.RepositoryMetadata;
 import org.codehaus.plexus.util.FileUtils;
 import org.eclipse.aether.RepositoryException;
 import org.eclipse.aether.metadata.AbstractMetadata;

maven-compat/src/main/java/org/apache/maven/artifact/resolver/DefaultArtifactResolver.java

@@ -1,18 +1,22 @@
 package org.apache.maven.artifact.resolver;
 
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * Licensed to the Apache Software Foundation (ASF) under one
- * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * or more contributor license agreements.  See the NOTICE file
- * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * distributed with this work for additional information
- * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * regarding copyright ownership.  The ASF licenses this file
- * copy of the License at
+ * 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
+ * Unless required by applicable law or agreed to in writing,
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * software distributed under the License is distributed on an
- * or implied. See the License for the specific language governing permissions and limitations under
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * the License.
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
 import java.io.File;
@@ -65,7 +69,7 @@
 /**
  * @author Jason van Zyl
  */
-@Component(role = ArtifactResolver.class)
+@Component( role = ArtifactResolver.class )
 public class DefaultArtifactResolver
     implements ArtifactResolver
 {
@@ -111,7 +115,8 @@ public void execute( Runnable command )
         else
         {
             executor =
-                new ThreadPoolExecutor( threads, threads, 3, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>(), new DaemonThreadCreator());
+                new ThreadPoolExecutor( 0, threads, 3, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>(),
+                                        new DaemonThreadCreator() );
         }
     }
 
@@ -151,19 +156,22 @@ private void injectSession2( ArtifactResolutionRequest request, MavenSession ses
         }
     }
 
-    public void resolve( Artifact artifact, List<ArtifactRepository> remoteRepositories, ArtifactRepository localRepository, TransferListener resolutionListener )
+    public void resolve( Artifact artifact, List<ArtifactRepository> remoteRepositories,
+                         ArtifactRepository localRepository, TransferListener resolutionListener )
         throws ArtifactResolutionException, ArtifactNotFoundException
     {
         resolve( artifact, remoteRepositories, getSession( localRepository ) );
     }
 
-    public void resolveAlways( Artifact artifact, List<ArtifactRepository> remoteRepositories, ArtifactRepository localRepository )
+    public void resolveAlways( Artifact artifact, List<ArtifactRepository> remoteRepositories,
+                               ArtifactRepository localRepository )
         throws ArtifactResolutionException, ArtifactNotFoundException
     {
         resolve( artifact, remoteRepositories, getSession( localRepository ) );
     }
 
-    private void resolve( Artifact artifact, List<ArtifactRepository> remoteRepositories, RepositorySystemSession session )
+    private void resolve( Artifact artifact, List<ArtifactRepository> remoteRepositories,
+                          RepositorySystemSession session )
         throws ArtifactResolutionException, ArtifactNotFoundException
     {
         if ( artifact == null )
@@ -249,52 +257,73 @@ private void resolve( Artifact artifact, List<ArtifactRepository> remoteReposito
         }
     }
 
-    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact, ArtifactRepository localRepository, List<ArtifactRepository> remoteRepositories,
+    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact,
+                                                         ArtifactRepository localRepository,
+                                                         List<ArtifactRepository> remoteRepositories,
                                                          ArtifactMetadataSource source, ArtifactFilter filter )
         throws ArtifactResolutionException, ArtifactNotFoundException
     {
-        return resolveTransitively( artifacts, originatingArtifact, Collections.EMPTY_MAP, localRepository, remoteRepositories, source, filter );
+        return resolveTransitively( artifacts, originatingArtifact, Collections.EMPTY_MAP, localRepository,
+                                    remoteRepositories, source, filter );
 
     }
 
-    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact, Map managedVersions, ArtifactRepository localRepository,
+    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact,
-                                                         List<ArtifactRepository> remoteRepositories, ArtifactMetadataSource source )
+                                                         Map managedVersions, ArtifactRepository localRepository,
+                                                         List<ArtifactRepository> remoteRepositories,
+                                                         ArtifactMetadataSource source )
         throws ArtifactResolutionException, ArtifactNotFoundException
     {
-        return resolveTransitively( artifacts, originatingArtifact, managedVersions, localRepository, remoteRepositories, source, null );
+        return resolveTransitively( artifacts, originatingArtifact, managedVersions, localRepository,
+                                    remoteRepositories, source, null );
     }
 
-    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact, Map managedVersions, ArtifactRepository localRepository,
+    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact,
-                                                         List<ArtifactRepository> remoteRepositories, ArtifactMetadataSource source, ArtifactFilter filter )
+                                                         Map managedVersions, ArtifactRepository localRepository,
+                                                         List<ArtifactRepository> remoteRepositories,
+                                                         ArtifactMetadataSource source, ArtifactFilter filter )
         throws ArtifactResolutionException, ArtifactNotFoundException
     {
-        return resolveTransitively( artifacts, originatingArtifact, managedVersions, localRepository, remoteRepositories, source, filter, null );
+        return resolveTransitively( artifacts, originatingArtifact, managedVersions, localRepository,
+                                    remoteRepositories, source, filter, null );
     }
 
-    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact, List<ArtifactRepository> remoteRepositories, ArtifactRepository localRepository,
+    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact,
+                                                         List<ArtifactRepository> remoteRepositories,
+                                                         ArtifactRepository localRepository,
                                                          ArtifactMetadataSource source )
         throws ArtifactResolutionException, ArtifactNotFoundException
     {
         return resolveTransitively( artifacts, originatingArtifact, localRepository, remoteRepositories, source, null );
     }
 
-    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact, List<ArtifactRepository> remoteRepositories, ArtifactRepository localRepository,
+    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact,
-                                                         ArtifactMetadataSource source, List<ResolutionListener> listeners )
+                                                         List<ArtifactRepository> remoteRepositories,
+                                                         ArtifactRepository localRepository,
+                                                         ArtifactMetadataSource source,
+                                                         List<ResolutionListener> listeners )
         throws ArtifactResolutionException, ArtifactNotFoundException
     {
         return resolveTransitively( artifacts, originatingArtifact, Collections.EMPTY_MAP, localRepository,
                                     remoteRepositories, source, null, listeners );
     }
 
-    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact, Map managedVersions, ArtifactRepository localRepository,
+    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact,
-                                                         List<ArtifactRepository> remoteRepositories, ArtifactMetadataSource source, ArtifactFilter filter, List<ResolutionListener> listeners )
+                                                         Map managedVersions, ArtifactRepository localRepository,
+                                                         List<ArtifactRepository> remoteRepositories,
+                                                         ArtifactMetadataSource source, ArtifactFilter filter,
+                                                         List<ResolutionListener> listeners )
         throws ArtifactResolutionException, ArtifactNotFoundException
     {
-        return resolveTransitively( artifacts, originatingArtifact, managedVersions, localRepository, remoteRepositories, source, filter, listeners, null );
+        return resolveTransitively( artifacts, originatingArtifact, managedVersions, localRepository,
+                                    remoteRepositories, source, filter, listeners, null );
     }
 
-    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact, Map managedVersions, ArtifactRepository localRepository,
+    public ArtifactResolutionResult resolveTransitively( Set<Artifact> artifacts, Artifact originatingArtifact,
-                                                         List<ArtifactRepository> remoteRepositories, ArtifactMetadataSource source, ArtifactFilter filter, List<ResolutionListener> listeners,
+                                                         Map managedVersions, ArtifactRepository localRepository,
+                                                         List<ArtifactRepository> remoteRepositories,
+                                                         ArtifactMetadataSource source, ArtifactFilter filter,
+                                                         List<ResolutionListener> listeners,
                                                          List<ConflictResolver> conflictResolvers )
         throws ArtifactResolutionException, ArtifactNotFoundException
     {
@@ -336,7 +365,7 @@ public ArtifactResolutionResult resolve( ArtifactResolutionRequest request )
     {
         Artifact rootArtifact = request.getArtifact();
         Set<Artifact> artifacts = request.getArtifactDependencies();
-        Map managedVersions = request.getManagedVersionMap();
+        Map<String, Artifact> managedVersions = request.getManagedVersionMap();
         List<ResolutionListener> listeners = request.getListeners();
         ArtifactFilter collectionFilter = request.getCollectionFilter();                       
         ArtifactFilter resolutionFilter = request.getResolutionFilter();
@@ -528,18 +557,18 @@ public void resolve( Artifact artifact, List<ArtifactRepository> remoteRepositor
     /**
      * ThreadCreator for creating daemon threads with fixed ThreadGroup-name.
      */
-    final static class DaemonThreadCreator
+    static final class DaemonThreadCreator
         implements ThreadFactory
     {
         static final String THREADGROUP_NAME = "org.apache.maven.artifact.resolver.DefaultArtifactResolver";
 
-        final static ThreadGroup group = new ThreadGroup( THREADGROUP_NAME );
+        static final ThreadGroup GROUP = new ThreadGroup( THREADGROUP_NAME );
 
-        final static AtomicInteger threadNumber = new AtomicInteger( 1 );
+        static final AtomicInteger THREAD_NUMBER = new AtomicInteger( 1 );
 
         public Thread newThread( Runnable r )
         {
-            Thread newThread = new Thread( group, r, "resolver-" + threadNumber.getAndIncrement() );
+            Thread newThread = new Thread( GROUP, r, "resolver-" + THREAD_NUMBER.getAndIncrement() );
             newThread.setDaemon( true );
             return newThread;
         }
@@ -574,6 +603,7 @@ public ResolveTask( ClassLoader classLoader, CountDownLatch latch, Artifact arti
 
         public void run()
         {
+            ClassLoader old = Thread.currentThread().getContextClassLoader();
             try
             {
                 Thread.currentThread().setContextClassLoader( classLoader );
@@ -602,6 +632,8 @@ public void run()
             finally
             {
                 latch.countDown();
+                Thread.currentThread().setContextClassLoader( old );
+
             }
         }
 

maven-compat/src/main/java/org/apache/maven/profiles/DefaultProfileManager.java

@@ -20,13 +20,10 @@
  */
 
 import org.apache.maven.model.Activation;
-import org.apache.maven.model.InputLocation;
 import org.apache.maven.model.Profile;
 import org.apache.maven.model.building.ModelProblem;
 import org.apache.maven.model.building.ModelProblemCollector;
-import org.apache.maven.model.building.ModelProblem.Severity;
 import org.apache.maven.model.profile.DefaultProfileActivationContext;
-import org.apache.maven.model.profile.ProfileActivationContext;
 import org.apache.maven.model.profile.ProfileSelector;
 import org.apache.maven.profiles.activation.ProfileActivationException;
 import org.codehaus.plexus.MutablePlexusContainer;
@@ -36,13 +33,11 @@
 import org.codehaus.plexus.logging.Logger;
 
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
-import org.apache.maven.model.building.ModelProblem.Version;
 import org.apache.maven.model.building.ModelProblemCollectorRequest;
 
 @Deprecated

maven-compat/src/main/java/org/apache/maven/profiles/activation/SystemPropertyProfileActivator.java

@@ -63,7 +63,7 @@ public boolean isActive( Profile profile )
                     + profile.getId() + "'" );
             }
 
-            if ( name.startsWith("!") )
+            if ( name.startsWith( "!" ) )
             {
                 reverseName = true;
                 name = name.substring( 1 );

maven-compat/src/main/java/org/apache/maven/project/interpolation/AbstractStringBasedModelInterpolator.java

@@ -283,7 +283,7 @@ protected List<InterpolationPostProcessor> createPostProcessors( final Model mod
                                                                                                          pathTranslator ) );
     }
 
-    @SuppressWarnings("unchecked")
+    @SuppressWarnings( "unchecked" )
     protected String interpolateInternal( String src, List<ValueSource> valueSources,
                                           List<InterpolationPostProcessor> postProcessors, boolean debug )
         throws ModelInterpolationException
@@ -296,7 +296,7 @@ protected String interpolateInternal( String src, List<ValueSource> valueSources
         Logger logger = getLogger();
 
         String result = src;
-        synchronized( this )
+        synchronized ( this )
         {
 
             for ( ValueSource vs : valueSources )
@@ -315,7 +315,7 @@ protected String interpolateInternal( String src, List<ValueSource> valueSources
                 {
                     result = interpolator.interpolate( result, recursionInterceptor );
                 }
-                catch( InterpolationException e )
+                catch ( InterpolationException e )
                 {
                     throw new ModelInterpolationException( e.getMessage(), e );
                 }

maven-compat/src/main/java/org/apache/maven/project/validation/DefaultModelValidator.java

@@ -19,15 +19,11 @@
  * under the License.
  */
 
-import java.util.List;
-import org.apache.maven.model.InputLocation;
 import org.apache.maven.model.Model;
 import org.apache.maven.model.building.DefaultModelBuildingRequest;
 import org.apache.maven.model.building.ModelBuildingRequest;
 import org.apache.maven.model.building.ModelProblem;
 import org.apache.maven.model.building.ModelProblemCollector;
-import org.apache.maven.model.building.ModelProblem.Severity;
-import org.apache.maven.model.building.ModelProblem.Version;
 import org.apache.maven.model.building.ModelProblemCollectorRequest;
 import org.codehaus.plexus.component.annotations.Component;
 import org.codehaus.plexus.component.annotations.Requirement;

maven-compat/src/main/java/org/apache/maven/repository/MetadataGraphNode.java

@@ -41,8 +41,8 @@ public class MetadataGraphNode
 
     public MetadataGraphNode()
     {
-        inNodes = new ArrayList<MetadataGraphNode>(4);
+        inNodes = new ArrayList<MetadataGraphNode>( 4 );
-        exNodes = new ArrayList<MetadataGraphNode>(8);
+        exNodes = new ArrayList<MetadataGraphNode>( 8 );
     }
 
     public MetadataGraphNode( MavenArtifactMetadata metadata )

maven-compat/src/main/java/org/apache/maven/repository/legacy/repository/DefaultArtifactRepositoryFactory.java

@@ -43,7 +43,7 @@ public class DefaultArtifactRepositoryFactory
     private String globalChecksumPolicy;
 
     @Requirement( role = ArtifactRepositoryLayout.class )
-    private Map<String,ArtifactRepositoryLayout> repositoryLayouts;
+    private Map<String, ArtifactRepositoryLayout> repositoryLayouts;
 
     public ArtifactRepositoryLayout getLayout( String layoutId )
         throws UnknownRepositoryLayoutException

maven-compat/src/main/java/org/apache/maven/repository/legacy/resolver/DefaultLegacyArtifactCollector.java

@@ -63,7 +63,7 @@
 public class DefaultLegacyArtifactCollector
     implements LegacyArtifactCollector
 {
-	@Requirement(hint="nearest")
+    @Requirement( hint = "nearest" )
     private ConflictResolver defaultConflictResolver;
 
     @Requirement

maven-compat/src/main/java/org/apache/maven/repository/legacy/resolver/transform/ArtifactTransformation.java

@@ -38,18 +38,17 @@ public interface ArtifactTransformation
 
     /**
      * Take in a artifact and return the transformed artifact for locating in the remote repository. If no
-     * transformation has occured the original artifact is returned.
+     * transformation has occurred the original artifact is returned.
      *
      * @param artifact           Artifact to be transformed.
      * @param request the repositories to check
-     * @param localRepository    the local repository
      */
     void transformForResolve( Artifact artifact, RepositoryRequest request )
         throws ArtifactResolutionException, ArtifactNotFoundException;
 
     /**
      * Take in a artifact and return the transformed artifact for locating in the remote repository. If no
-     * transformation has occured the original artifact is returned.
+     * transformation has occurred the original artifact is returned.
      *
      * @param artifact           Artifact to be transformed.
      * @param remoteRepositories the repositories to check
@@ -62,7 +61,7 @@ void transformForResolve( Artifact artifact,
 
     /**
      * Take in a artifact and return the transformed artifact for locating in the local repository. If no
-     * transformation has occured the original artifact is returned.
+     * transformation has occurred the original artifact is returned.
      *
      * @param artifact        Artifact to be transformed.
      * @param localRepository the local repository it will be stored in
@@ -72,8 +71,8 @@ void transformForInstall( Artifact artifact,
         throws ArtifactInstallationException;
 
     /**
-     * Take in a artifact and return the transformed artifact for distributing toa remote repository. If no
+     * Take in a artifact and return the transformed artifact for distributing to remote repository. If no
-     * transformation has occured the original artifact is returned.
+     * transformation has occurred the original artifact is returned.
      *
      * @param artifact         Artifact to be transformed.
      * @param remoteRepository the repository to deploy to

maven-compat/src/main/java/org/apache/maven/repository/legacy/resolver/transform/ArtifactTransformationManager.java

@@ -40,7 +40,6 @@ public interface ArtifactTransformationManager
      *
      * @param artifact           Artifact to be transformed.
      * @param request the repositories to check
-     * @param localRepository    the local repository
      */
     void transformForResolve( Artifact artifact, RepositoryRequest request )
         throws ArtifactResolutionException, ArtifactNotFoundException;

maven-compat/src/main/java/org/apache/maven/repository/metadata/ArtifactMetadata.java

@@ -28,7 +28,6 @@
  * Artifact Metadata that is resolved independent of Artifact itself.
  *
  * @author <a href="oleg@codehaus.org">Oleg Gusakov</a>
- *
  */
 public class ArtifactMetadata
 {
@@ -291,7 +290,7 @@ public boolean isArtifactExists()
         return artifactExists;
     }
 
-    public void setArtifactExists(boolean artifactExists)
+    public void setArtifactExists( boolean artifactExists )
     {
         this.artifactExists = artifactExists;
     }
@@ -302,7 +301,7 @@ public Collection<ArtifactMetadata> getDependencies()
         return dependencies;
     }
 
-    public void setDependencies(Collection<ArtifactMetadata> dependencies)
+    public void setDependencies( Collection<ArtifactMetadata> dependencies )
     {
         this.dependencies = dependencies;
     }
@@ -312,7 +311,7 @@ public String getArtifactUri()
         return artifactUri;
     }
 
-    public void setArtifactUri(String artifactUri)
+    public void setArtifactUri( String artifactUri )
     {
         this.artifactUri = artifactUri;
     }
@@ -322,23 +321,28 @@ public String getWhy()
     {
         return why;
     }
-    public void setWhy(String why)
+
+    public void setWhy( String why )
     {
         this.why = why;
     }
+
     //-------------------------------------------------------------------
     public String getError()
     {
         return error;
     }
-    public void setError(String error)
+
+    public void setError( String error )
     {
         this.error = error;
     }
+
     public boolean isError()
     {
         return error == null;
     }
+
     //------------------------------------------------------------------
     public String getDependencyConflictId()
     {

maven-compat/src/main/java/org/apache/maven/repository/metadata/MetadataGraph.java

@@ -294,7 +294,7 @@ private static void checkEdge( MetadataGraphEdge e )
     //------------------------------------------------------------------------
     public List<MetadataGraphEdge> getEdgesBetween( MetadataGraphVertex vFrom, MetadataGraphVertex vTo )
     {
-        List<MetadataGraphEdge> edges = getIncidentEdges(vTo);
+        List<MetadataGraphEdge> edges = getIncidentEdges( vTo );
         if ( edges == null || edges.isEmpty() )
         {
             return null;

maven-compat/src/main/java/org/apache/maven/repository/metadata/MetadataResolution.java

@@ -62,7 +62,7 @@ public ArtifactMetadata getArtifactMetadata()
         return artifactMetadata;
     }
 
-    public void setArtifactMetadata(ArtifactMetadata artifactMetadata)
+    public void setArtifactMetadata( ArtifactMetadata artifactMetadata )
     {
         this.artifactMetadata = artifactMetadata;
     }

maven-core/pom.xml

@@ -124,73 +124,62 @@
           </models>
         </configuration>
       </plugin>
-    </plugins>
-  </build>
-
-  <profiles>
-    <profile>
-      <id>svn-buildnumber</id>
-      <activation>
-        <file>
-          <exists>.svn</exists>
-        </file>
-      </activation>
-      <build>
-        <plugins>
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>buildnumber-maven-plugin</artifactId>
         <executions>
           <execution>
-                <phase>generate-resources</phase>
+            <id>create-noncanonicalrev</id>
+            <goals>
+              <goal>create-timestamp</goal>
+            </goals>
+            <configuration>
+              <timestampFormat>'NON-CANONICAL_'yyyy-MM-dd_HH-mm_'${user.name}'</timestampFormat>
+              <timestampPropertyName>nonCanonicalRevision</timestampPropertyName>
+            </configuration>
+          </execution>
+          <execution>
+            <id>create-buildnumber</id>
             <goals>
               <goal>create</goal>
             </goals>
-              </execution>
-            </executions>
             <configuration>
               <doCheck>false</doCheck>
               <doUpdate>false</doUpdate>
-              <providerImplementations>
+              <revisionOnScmFailure>${nonCanonicalRevision}</revisionOnScmFailure>
-                <svn>javasvn</svn>
-              </providerImplementations> 
             </configuration>
+          </execution>
+        </executions>
       </plugin>
     </plugins>
-      </build>
+    <pluginManagement>
-    </profile>
-    <profile>
-      <id>non-canonical-buildnumber</id>
-      <activation>
-        <file>
-          <missing>.svn</missing>
-        </file>
-      </activation>
-      <build>
       <plugins>
+        <!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
         <plugin>
+          <groupId>org.eclipse.m2e</groupId>
+          <artifactId>lifecycle-mapping</artifactId>
+          <version>1.0.0</version>
+          <configuration>
+            <lifecycleMappingMetadata>
+              <pluginExecutions>
+                <pluginExecution>
+                  <pluginExecutionFilter>
                     <groupId>org.codehaus.mojo</groupId>
                     <artifactId>buildnumber-maven-plugin</artifactId>
-            <executions>
+                    <versionRange>[1.2,)</versionRange>
-              <execution>
-                <phase>generate-resources</phase>
                     <goals>
-                  <goal>create</goal>
+                      <goal>create-timestamp</goal>
                     </goals>
-              </execution>
+                  </pluginExecutionFilter>
-            </executions>
+                  <action>
-            <configuration>
+                    <ignore></ignore>
-              <doCheck>false</doCheck>
+                  </action>
-              <doUpdate>false</doUpdate>
+                </pluginExecution>
-              <format>NON-CANONICAL_{0,date,yyyy-MM-dd_HH-mm}_{1}</format>
+              </pluginExecutions>
-              <items>
+            </lifecycleMappingMetadata>
-                <item>timestamp</item>
-                <item>${user.name}</item>
-              </items>
           </configuration>
         </plugin>
       </plugins>
+    </pluginManagement>
   </build>
-    </profile>
-  </profiles>
 </project>

maven-core/src/main/java/org/apache/maven/DefaultMaven.java

@@ -88,9 +88,11 @@
 import org.eclipse.aether.collection.DependencySelector;
 import org.eclipse.aether.collection.DependencyTraverser;
 import org.eclipse.aether.repository.LocalRepository;
+import org.eclipse.aether.repository.NoLocalRepositoryManagerException;
 import org.eclipse.aether.repository.RepositoryPolicy;
 import org.eclipse.aether.repository.WorkspaceReader;
 import org.eclipse.aether.resolution.ResolutionErrorPolicy;
+import org.eclipse.aether.spi.localrepo.LocalRepositoryManagerFactory;
 import org.eclipse.aether.util.graph.manager.ClassicDependencyManager;
 import org.eclipse.aether.util.graph.selector.AndDependencySelector;
 import org.eclipse.aether.util.graph.selector.ExclusionDependencySelector;
@@ -147,6 +149,9 @@ public class DefaultMaven
     @Requirement
     private RepositorySystem repoSystem;
 
+    @Requirement( optional = true, hint = "simple" )
+    private LocalRepositoryManagerFactory simpleLocalRepositoryManagerFactory;
+
     @Requirement
     private SettingsDecrypter settingsDecrypter;
 
@@ -378,7 +383,25 @@ else if ( request.isUpdateSnapshots() )
         session.setArtifactTypeRegistry( RepositoryUtils.newArtifactTypeRegistry( artifactHandlerManager ) );
 
         LocalRepository localRepo = new LocalRepository( request.getLocalRepository().getBasedir() );
+
+        if ( request.isUseLegacyLocalRepository() )
+        {
+            logger.warn( "Disabling enhanced local repository: using legacy is stronlgy discouraged to ensure build reproducibility." );
+            try
+            {
+                session.setLocalRepositoryManager( simpleLocalRepositoryManagerFactory.newInstance( localRepo ) );
+            }
+            catch ( NoLocalRepositoryManagerException e )
+            {
+
+                logger.warn( "Failed to configure legacy local repository: back to default" );
                 session.setLocalRepositoryManager( repoSystem.newLocalRepositoryManager( localRepo ) );
+            }
+        }
+        else
+        {
+            session.setLocalRepositoryManager( repoSystem.newLocalRepositoryManager( localRepo ) );
+        }
 
         if ( request.getWorkspaceReader() != null )
         {

maven-core/src/main/java/org/apache/maven/execution/DefaultMavenExecutionRequest.java

@@ -143,6 +143,8 @@ public class DefaultMavenExecutionRequest
      */
     private boolean noSnapshotUpdates;
 
+    private boolean useSimpleLocalRepositoryManager = false;
+
     public DefaultMavenExecutionRequest()
     {
     }
@@ -1076,4 +1078,14 @@ public MavenExecutionRequest setCacheNotFound( boolean cacheNotFound )
         return this;
     }
 
+    public boolean isUseLegacyLocalRepository()
+    {
+        return this.useSimpleLocalRepositoryManager;
+    }
+
+    public MavenExecutionRequest setUseLegacyLocalRepository( boolean useSimpleLocalRepositoryManager )
+    {
+        this.useSimpleLocalRepositoryManager = useSimpleLocalRepositoryManager;
+        return this;
+    }
 }

maven-core/src/main/java/org/apache/maven/execution/DefaultMavenExecutionResult.java

@@ -19,7 +19,6 @@
  * under the License.
  */
 
-import java.util.ArrayList;
 import java.util.Collections;
 import java.util.IdentityHashMap;
 import java.util.List;
@@ -39,7 +38,7 @@ public class DefaultMavenExecutionResult
 
     private DependencyResolutionResult dependencyResolutionResult;
 
-    private List<Throwable> exceptions = new CopyOnWriteArrayList<Throwable>(  );
+    private List<Throwable> exceptions = new CopyOnWriteArrayList<Throwable>();
 
     private Map<MavenProject, BuildSummary> buildSummaries;
 

maven-core/src/main/java/org/apache/maven/execution/MavenExecutionRequest.java

@@ -45,45 +45,45 @@ public interface MavenExecutionRequest
     // Logging
     // ----------------------------------------------------------------------
 
-    final int LOGGING_LEVEL_DEBUG = Logger.LEVEL_DEBUG;
+    int LOGGING_LEVEL_DEBUG = Logger.LEVEL_DEBUG;
 
-    final int LOGGING_LEVEL_INFO = Logger.LEVEL_INFO;
+    int LOGGING_LEVEL_INFO = Logger.LEVEL_INFO;
 
-    final int LOGGING_LEVEL_WARN = Logger.LEVEL_WARN;
+    int LOGGING_LEVEL_WARN = Logger.LEVEL_WARN;
 
-    final int LOGGING_LEVEL_ERROR = Logger.LEVEL_ERROR;
+    int LOGGING_LEVEL_ERROR = Logger.LEVEL_ERROR;
 
-    final int LOGGING_LEVEL_FATAL = Logger.LEVEL_FATAL;
+    int LOGGING_LEVEL_FATAL = Logger.LEVEL_FATAL;
 
-    final int LOGGING_LEVEL_DISABLED = Logger.LEVEL_DISABLED;
+    int LOGGING_LEVEL_DISABLED = Logger.LEVEL_DISABLED;
 
     // ----------------------------------------------------------------------
     // Reactor Failure Mode
     // ----------------------------------------------------------------------
 
-    final String REACTOR_FAIL_FAST = "FAIL_FAST";
+    String REACTOR_FAIL_FAST = "FAIL_FAST";
 
-    final String REACTOR_FAIL_AT_END = "FAIL_AT_END";
+    String REACTOR_FAIL_AT_END = "FAIL_AT_END";
 
-    final String REACTOR_FAIL_NEVER = "FAIL_NEVER";
+    String REACTOR_FAIL_NEVER = "FAIL_NEVER";
 
     // ----------------------------------------------------------------------
     // Reactor Make Mode
     // ----------------------------------------------------------------------
 
-    final String REACTOR_MAKE_UPSTREAM = "make-upstream";
+    String REACTOR_MAKE_UPSTREAM = "make-upstream";
 
-    final String REACTOR_MAKE_DOWNSTREAM = "make-downstream";
+    String REACTOR_MAKE_DOWNSTREAM = "make-downstream";
 
-    final String REACTOR_MAKE_BOTH = "make-both";
+    String REACTOR_MAKE_BOTH = "make-both";
 
     // ----------------------------------------------------------------------
     // Artifact repository policies
     // ----------------------------------------------------------------------
 
-    final String CHECKSUM_POLICY_FAIL = ArtifactRepositoryPolicy.CHECKSUM_POLICY_FAIL;
+    String CHECKSUM_POLICY_FAIL = ArtifactRepositoryPolicy.CHECKSUM_POLICY_FAIL;
 
-    final String CHECKSUM_POLICY_WARN = ArtifactRepositoryPolicy.CHECKSUM_POLICY_WARN;
+    String CHECKSUM_POLICY_WARN = ArtifactRepositoryPolicy.CHECKSUM_POLICY_WARN;
 
     // ----------------------------------------------------------------------
     //
@@ -283,4 +283,14 @@ public interface MavenExecutionRequest
 
     ProjectBuildingRequest getProjectBuildingRequest();
 
+    /**
+     * @since 3.1
+     */
+    boolean isUseLegacyLocalRepository();
+
+    /**
+     * @since 3.1
+     */
+    MavenExecutionRequest setUseLegacyLocalRepository( boolean useLegacyLocalRepository );
+
 }

maven-core/src/main/java/org/apache/maven/lifecycle/internal/BuilderCommon.java

@@ -134,7 +134,8 @@ public MavenExecutionPlan resolveBuildPlan( MavenSession session, MavenProject p
     }
 
     public void handleBuildError( final ReactorContext buildContext, final MavenSession rootSession,
-                                  final MavenProject mavenProject, Exception e, final long buildStartTime )
+                                  final MavenSession currentSession, final MavenProject mavenProject, Exception e,
+                                  final long buildStartTime )
     {
         if ( e instanceof RuntimeException )
         {
@@ -147,7 +148,7 @@ public void handleBuildError( final ReactorContext buildContext, final MavenSess
 
         buildContext.getResult().addBuildSummary( new BuildFailure( mavenProject, buildEndTime - buildStartTime, e ) );
 
-        eventCatapult.fire( ExecutionEvent.Type.ProjectFailed, rootSession, null, e );
+        eventCatapult.fire( ExecutionEvent.Type.ProjectFailed, currentSession, null, e );
 
         if ( MavenExecutionRequest.REACTOR_FAIL_NEVER.equals( rootSession.getReactorFailureBehavior() ) )
         {
@@ -186,5 +187,4 @@ public static String getKey( MavenProject project )
         return project.getGroupId() + ':' + project.getArtifactId() + ':' + project.getVersion();
     }
 
-
 }

maven-core/src/main/java/org/apache/maven/lifecycle/internal/CurrentPhaseForThread.java

@@ -29,17 +29,16 @@
  */
 class CurrentPhaseForThread
 {
-    private static final InheritableThreadLocal<String> threadPhase = new InheritableThreadLocal<String>();
+    private static final InheritableThreadLocal<String> THREAD_PHASE = new InheritableThreadLocal<String>();
-
 
     public static void setPhase( String phase )
     {
-        threadPhase.set( phase );
+        THREAD_PHASE.set( phase );
     }
 
     public static boolean isPhase( String phase )
     {
-        return phase.equals( threadPhase.get() );
+        return phase.equals( THREAD_PHASE.get() );
     }
 
 }

maven-core/src/main/java/org/apache/maven/lifecycle/internal/DefaultLifecycleExecutionPlanCalculator.java

@@ -1,18 +1,23 @@
+package org.apache.maven.lifecycle.internal;
+
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * Licensed to the Apache Software Foundation (ASF) under one
- * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * or more contributor license agreements.  See the NOTICE file
- * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * distributed with this work for additional information
- * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * regarding copyright ownership.  The ASF licenses this file
- * copy of the License at
+ * 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
+ * Unless required by applicable law or agreed to in writing,
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * software distributed under the License is distributed on an
- * or implied. See the License for the specific language governing permissions and limitations under
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * the License.
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
  */
-package org.apache.maven.lifecycle.internal;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -219,11 +224,10 @@ private Map<String, List<MojoExecution>> calculateLifecycleMappings( MavenSessio
 
         if ( lifecycle == null )
         {
-            throw new LifecyclePhaseNotFoundException(
+            throw new LifecyclePhaseNotFoundException( "Unknown lifecycle phase \"" + lifecyclePhase
-                "Unknown lifecycle phase \"" + lifecyclePhase + "\". You must specify a valid lifecycle phase" +
+                + "\". You must specify a valid lifecycle phase" + " or a goal in the format <plugin-prefix>:<goal> or"
-                    " or a goal in the format <plugin-prefix>:<goal> or" +
+                + " <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>. Available lifecycle phases are: "
-                    " <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>. Available lifecycle phases are: " +
+                + defaultLifeCycles.getLifecyclePhaseList() + ".", lifecyclePhase );
-                    defaultLifeCycles.getLifecyclePhaseList() + ".", lifecyclePhase );
         }
 
         /*
@@ -432,8 +436,8 @@ private void finalizeMojoConfiguration( MojoExecution mojoExecution )
                 {
                     parameterConfiguration = new Xpp3Dom( parameterConfiguration, parameter.getName() );
 
-                    if ( StringUtils.isEmpty( parameterConfiguration.getAttribute( "implementation" ) ) &&
+                    if ( StringUtils.isEmpty( parameterConfiguration.getAttribute( "implementation" ) )
-                        StringUtils.isNotEmpty( parameter.getImplementation() ) )
+                        && StringUtils.isNotEmpty( parameter.getImplementation() ) )
                     {
                         parameterConfiguration.setAttribute( "implementation", parameter.getImplementation() );
                     }

maven-core/src/main/java/org/apache/maven/lifecycle/internal/DefaultLifecyclePluginAnalyzer.java

@@ -80,8 +80,8 @@ public Set<Plugin> getPluginsBoundByDefaultToAllLifecycles( String packaging )
     {
         if ( logger.isDebugEnabled() )
         {
-            logger.debug( "Looking up lifecyle mappings for packaging " + packaging + " from " +
+            logger.debug( "Looking up lifecyle mappings for packaging " + packaging + " from "
-                Thread.currentThread().getContextClassLoader() );
+                + Thread.currentThread().getContextClassLoader() );
         }
 
         LifecycleMapping lifecycleMappingForPackaging = lifecycleMappings.get( packaging );

maven-core/src/main/java/org/apache/maven/lifecycle/internal/ExecutionPlanItem.java

@@ -94,8 +94,8 @@ public Plugin getPlugin()
     @Override
     public String toString()
     {
-        return "ExecutionPlanItem{" + ", mojoExecution=" + mojoExecution + ", schedule=" + schedule + '}' +
+        return "ExecutionPlanItem{" + ", mojoExecution=" + mojoExecution + ", schedule=" + schedule + '}'
-            super.toString();
+            + super.toString();
     }
 
 }

maven-core/src/main/java/org/apache/maven/lifecycle/internal/LifecycleDependencyResolver.java

@@ -1,20 +1,33 @@
 package org.apache.maven.lifecycle.internal;
 
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * Licensed to the Apache Software Foundation (ASF) under one
- * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * or more contributor license agreements.  See the NOTICE file
- * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * distributed with this work for additional information
- * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * regarding copyright ownership.  The ASF licenses this file
- * copy of the License at
+ * 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
+ * Unless required by applicable law or agreed to in writing,
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * software distributed under the License is distributed on an
- * or implied. See the License for the specific language governing permissions and limitations under                    
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * the License.
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
 import org.apache.maven.RepositoryUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.ArtifactUtils;
@@ -37,8 +50,6 @@
 import org.eclipse.aether.util.filter.AndDependencyFilter;
 import org.eclipse.aether.util.filter.ScopeDependencyFilter;
 
-import java.util.*;
-
 /**
  * Resolves dependencies for the artifacts in context of the lifecycle build
  * 
@@ -49,7 +60,7 @@
  *         <p/>
  *         NOTE: This class is not part of any public api and can be changed or deleted without prior notice.
  */
-@Component(role = LifecycleDependencyResolver.class)
+@Component( role = LifecycleDependencyResolver.class )
 public class LifecycleDependencyResolver
 {
 

maven-core/src/main/java/org/apache/maven/lifecycle/internal/LifecycleModuleBuilder.java

@@ -92,7 +92,7 @@ public void buildProject( MavenSession session, MavenSession rootSession, Reacto
         }
         catch ( Exception e )
         {
-            builderCommon.handleBuildError( reactorContext, rootSession, currentProject, e, buildStartTime );
+            builderCommon.handleBuildError( reactorContext, rootSession, session, currentProject, e, buildStartTime );
         }
         finally
         {

maven-core/src/main/java/org/apache/maven/lifecycle/internal/LifecycleWeaveBuilder.java

@@ -212,7 +212,8 @@ public ProjectSegment call()
             {
                 Iterator<ExecutionPlanItem> planItems = executionPlan.iterator();
                 ExecutionPlanItem current = planItems.hasNext() ? planItems.next() : null;
-                ThreadLockedArtifact threadLockedArtifact = (ThreadLockedArtifact)projectBuild.getProject().getArtifact();
+                ThreadLockedArtifact threadLockedArtifact =
+                    (ThreadLockedArtifact) projectBuild.getProject().getArtifact();
                 if ( threadLockedArtifact != null )
                 {
                     threadLockedArtifact.attachToThread();
@@ -277,8 +278,8 @@ public ProjectSegment call()
                 }
                 catch ( Exception e )
                 {
-                    builderCommon.handleBuildError( reactorContext, rootSession, projectBuild.getProject(), e,
+                    builderCommon.handleBuildError( reactorContext, rootSession, projectBuild.getSession(),
-                                                    buildStartTime );
+                                                    projectBuild.getProject(), e, buildStartTime );
                 }
                 finally
                 {
@@ -375,13 +376,14 @@ private Artifact findTestScopedArtifact( MavenProject upstreamProject )
         return null;
     }
 
-    private static boolean isThreadLockedAndEmpty(Artifact artifact){
+    private static boolean isThreadLockedAndEmpty( Artifact artifact )
-        return artifact instanceof  ThreadLockedArtifact && !((ThreadLockedArtifact) artifact).hasReal();
+    {
+        return artifact instanceof ThreadLockedArtifact && !( (ThreadLockedArtifact) artifact ).hasReal();
     }
 
     private static Artifact findDependency( MavenProject project, Artifact upStreamArtifact )
     {
-        if ( upStreamArtifact == null || isThreadLockedAndEmpty(upStreamArtifact))
+        if ( upStreamArtifact == null || isThreadLockedAndEmpty( upStreamArtifact ) )
         {
             return null;
         }
@@ -483,8 +485,6 @@ public void resolveFromUpstream()
             artifactInThis.setFile( upstream.getFile() );
             artifactInThis.setRepository( upstream.getRepository() );
             artifactInThis.setResolved( true ); // Or maybe upstream.isResolved()....
-
         }
     }
-
 }

maven-core/src/main/java/org/apache/maven/lifecycle/internal/ThreadLockedArtifact.java

@@ -52,8 +52,8 @@ class ThreadLockedArtifact
 
     public boolean hasReal()
     {
-        return real != null &&
+        return real != null
-            ( !( real instanceof ThreadLockedArtifact ) || ( (ThreadLockedArtifact) real ).hasReal() );
+            && ( !( real instanceof ThreadLockedArtifact ) || ( (ThreadLockedArtifact) real ).hasReal() );
     }
 
     public String getGroupId()
@@ -96,17 +96,17 @@ public boolean hasClassifier()
         return real.hasClassifier();
     }
 
-    private static final InheritableThreadLocal<ThreadLockedArtifact> threadArtifact =
+    private static final InheritableThreadLocal<ThreadLockedArtifact> THREAD_ARTIFACT =
         new InheritableThreadLocal<ThreadLockedArtifact>();
 
     public void attachToThread()
     {
-        threadArtifact.set( this );
+        THREAD_ARTIFACT.set( this );
     }
 
     public File getFile()
     {
-        final ThreadLockedArtifact lockedArtifact = threadArtifact.get();
+        final ThreadLockedArtifact lockedArtifact = THREAD_ARTIFACT.get();
         if ( lockedArtifact != null && this != lockedArtifact && mustLock() )
         {
             try

maven-core/src/main/java/org/apache/maven/model/plugin/DefaultLifecycleBindingsInjector.java

@@ -66,9 +66,9 @@ public void injectLifecycleBindings( Model model, ModelBuildingRequest request,
 
         if ( defaultPlugins == null )
         {
-            problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE)
+            problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
                     .setMessage( "Unknown packaging: " + packaging )
-                    .setLocation( model.getLocation( "packaging" )));
+                    .setLocation( model.getLocation( "packaging" ) ) );
         }
         else if ( !defaultPlugins.isEmpty() )
         {
@@ -80,7 +80,7 @@ else if ( !defaultPlugins.isEmpty() )
         }
     }
 
-    private static class LifecycleBindingsMerger
+    protected static class LifecycleBindingsMerger
         extends MavenModelMerger
     {
 

maven-core/src/main/java/org/apache/maven/plugin/BuildPluginManager.java

@@ -1,18 +1,22 @@
 package org.apache.maven.plugin;
 
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * Licensed to the Apache Software Foundation (ASF) under one
- * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * or more contributor license agreements.  See the NOTICE file
- * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * distributed with this work for additional information
- * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * regarding copyright ownership.  The ASF licenses this file
- * copy of the License at
+ * 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
+ * Unless required by applicable law or agreed to in writing,
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * software distributed under the License is distributed on an
- * or implied. See the License for the specific language governing permissions and limitations under
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * the License.
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
 import java.util.List;

maven-core/src/main/java/org/apache/maven/plugin/DefaultBuildPluginManager.java

@@ -1,18 +1,22 @@
 package org.apache.maven.plugin;
 
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * Licensed to the Apache Software Foundation (ASF) under one
- * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * or more contributor license agreements.  See the NOTICE file
- * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * distributed with this work for additional information
- * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * regarding copyright ownership.  The ASF licenses this file
- * copy of the License at
+ * 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
+ * Unless required by applicable law or agreed to in writing,
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * software distributed under the License is distributed on an
- * or implied. See the License for the specific language governing permissions and limitations under
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * the License.
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
 import java.io.ByteArrayOutputStream;
@@ -33,7 +37,7 @@
 // TODO: the antrun plugin has its own configurator, the only plugin that does. might need to think about how that works
 // TODO: remove the coreArtifactFilterManager
 
-@Component(role = BuildPluginManager.class)
+@Component( role = BuildPluginManager.class )
 public class DefaultBuildPluginManager
     implements BuildPluginManager
 {

maven-core/src/main/java/org/apache/maven/plugin/PluginParameterExpressionEvaluator.java

@@ -53,8 +53,8 @@
  * <tr><td><code>mojo.*</code></td>            <td>(since Maven 3)</td><td></td></tr>
  * <tr><td><code>plugin</code></td>            <td>(since Maven 3)</td><td>{@link MojoExecution#getMojoDescriptor()}.{@link MojoDescriptor#getPluginDescriptor() getPluginDescriptor()}</td></tr>
  * <tr><td><code>plugin.*</code></td>          <td></td>               <td></td></tr>
- * <tr><td>system properties</td>              <td></td>               <td></td></tr>
+ * <tr><td><code>*</code></td>                 <td></td>               <td>system properties</td></tr>
- * <tr><td>project properties</td>             <td></td>               <td></td></tr>
+ * <tr><td><code>*</code></td>                 <td></td>               <td>project properties</td></tr>
  * </table>
  * <i>Notice:</i> <code>reports</code> was supported in Maven 2.x but was removed in Maven 3
  * 

maven-core/src/main/java/org/apache/maven/plugin/internal/DefaultLegacySupport.java

@@ -19,6 +19,7 @@
  * under the License.
  */
 
+import java.util.concurrent.atomic.AtomicReference;
 import org.apache.maven.execution.MavenSession;
 import org.apache.maven.plugin.LegacySupport;
 import org.codehaus.plexus.component.annotations.Component;
@@ -37,29 +38,30 @@ public class DefaultLegacySupport
     implements LegacySupport
 {
 
-    private static final ThreadLocal<MavenSession[]> session = new InheritableThreadLocal<MavenSession[]>();
+    private static final ThreadLocal<AtomicReference<MavenSession>> SESSION = new InheritableThreadLocal<AtomicReference<MavenSession>>();
 
     public void setSession( MavenSession session )
     {
-        if ( session == null )
+        AtomicReference<MavenSession> reference = DefaultLegacySupport.SESSION.get();
+        if ( reference != null )
         {
-            MavenSession[] oldSession = DefaultLegacySupport.session.get();
+            reference.set( null );
-            if ( oldSession != null )
-            {
-                oldSession[0] = null;
-                DefaultLegacySupport.session.remove();
         }
+
+        if ( session == null && reference != null )
+        {
+            DefaultLegacySupport.SESSION.remove();
         }
         else
         {
-            DefaultLegacySupport.session.set( new MavenSession[] { session } );
+            DefaultLegacySupport.SESSION.set( new AtomicReference<MavenSession>( session ) );
         }
     }
 
     public MavenSession getSession()
     {
-        MavenSession[] currentSession = DefaultLegacySupport.session.get();
+        AtomicReference<MavenSession> currentSession = DefaultLegacySupport.SESSION.get();
-        return currentSession != null ? currentSession[0] : null;
+        return currentSession != null ? currentSession.get() : null;
     }
 
     public RepositorySystemSession getRepositorySession()

maven-core/src/main/java/org/apache/maven/plugin/internal/DefaultMavenPluginManager.java

@@ -83,6 +83,7 @@
 import org.codehaus.plexus.configuration.PlexusConfigurationException;
 import org.codehaus.plexus.configuration.xml.XmlPlexusConfiguration;
 import org.codehaus.plexus.logging.Logger;
+import org.codehaus.plexus.logging.LoggerManager;
 import org.codehaus.plexus.util.IOUtil;
 import org.codehaus.plexus.util.ReaderFactory;
 import org.codehaus.plexus.util.StringUtils;
@@ -110,6 +111,9 @@ public class DefaultMavenPluginManager
     @Requirement
     private Logger logger;
 
+    @Requirement
+    private LoggerManager loggerManager;
+
     @Requirement
     private PlexusContainer container;
 
@@ -508,7 +512,8 @@ else if ( cause instanceof LinkageError )
 
             if ( mojo instanceof Mojo )
             {
-                ( (Mojo) mojo ).setLog( new DefaultLog( logger ) );
+                Logger mojoLogger = loggerManager.getLoggerForComponent( mojoDescriptor.getImplementation() );
+                ( (Mojo) mojo ).setLog( new DefaultLog( mojoLogger ) );
             }
 
             Xpp3Dom dom = mojoExecution.getConfiguration();

maven-core/src/main/java/org/apache/maven/plugin/internal/PluginDependenciesResolver.java

@@ -50,7 +50,7 @@ public interface PluginDependenciesResolver
      * @return The resolved plugin artifact, never {@code null}.
      * @throws PluginResolutionException If the plugin artifact could not be resolved.
      */
-    public Artifact resolve( Plugin plugin, List<RemoteRepository> repositories, RepositorySystemSession session )
+    Artifact resolve( Plugin plugin, List<RemoteRepository> repositories, RepositorySystemSession session )
         throws PluginResolutionException;
 
     /**

maven-core/src/main/java/org/apache/maven/plugin/prefix/PluginPrefixResult.java

@@ -1,7 +1,5 @@
 package org.apache.maven.plugin.prefix;
 
-import org.eclipse.aether.repository.ArtifactRepository;
-
 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
@@ -21,6 +19,8 @@
  * under the License.
  */
 
+import org.eclipse.aether.repository.ArtifactRepository;
+
 /**
  * Describes the result of a plugin prefix resolution request.
  * 

maven-core/src/main/java/org/apache/maven/project/DefaultModelBuildingListener.java

@@ -97,9 +97,9 @@ public void buildExtensionsAssembled( ModelBuildingEvent event )
         }
         catch ( Exception e )
         {
-            event.getProblems().add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE)
+            event.getProblems().add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
                     .setMessage( "Invalid plugin repository: " + e.getMessage() )
-                    .setException( e ));
+                    .setException( e ) );
         }
         project.setPluginArtifactRepositories( pluginRepositories );
 
@@ -115,15 +115,15 @@ public void buildExtensionsAssembled( ModelBuildingEvent event )
             }
             catch ( PluginResolutionException e )
             {
-                event.getProblems().add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE)
+                event.getProblems().add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
-                        .setMessage( "Unresolveable build extension: " + e.getMessage())
+                        .setMessage( "Unresolveable build extension: " + e.getMessage() )
-                        .setException( e ));
+                        .setException( e ) );
             }
             catch ( PluginVersionResolutionException e )
             {
-                event.getProblems().add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE)
+                event.getProblems().add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
                         .setMessage( "Unresolveable build extension: " + e.getMessage() )
-                        .setException( e ));
+                        .setException( e ) );
             }
 
             projectBuildingHelper.selectProjectRealm( project );
@@ -138,9 +138,9 @@ public void buildExtensionsAssembled( ModelBuildingEvent event )
         }
         catch ( Exception e )
         {
-            event.getProblems().add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE)
+            event.getProblems().add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
                     .setMessage( "Invalid artifact repository: " + e.getMessage() )
-                    .setException( e ));
+                    .setException( e ) );
         }
         project.setRemoteArtifactRepositories( remoteRepositories );
     }

maven-core/src/main/java/org/apache/maven/project/DefaultProjectBuilder.java

@@ -1,18 +1,22 @@
 package org.apache.maven.project;
 
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * Licensed to the Apache Software Foundation (ASF) under one
- * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * or more contributor license agreements.  See the NOTICE file
- * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * distributed with this work for additional information
- * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * regarding copyright ownership.  The ASF licenses this file
- * copy of the License at
+ * 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
+ * Unless required by applicable law or agreed to in writing,
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * software distributed under the License is distributed on an
- * or implied. See the License for the specific language governing permissions and limitations under
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * the License.
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
 import java.io.File;

maven-core/src/main/java/org/apache/maven/project/MavenProject.java

@@ -1,18 +1,22 @@
 package org.apache.maven.project;
 
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * Licensed to the Apache Software Foundation (ASF) under one
- * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * or more contributor license agreements.  See the NOTICE file
- * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * distributed with this work for additional information
- * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * regarding copyright ownership.  The ASF licenses this file
- * copy of the License at
+ * 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
+ * Unless required by applicable law or agreed to in writing,
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * software distributed under the License is distributed on an
- * or implied. See the License for the specific language governing permissions and limitations under
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * the License.
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
 import org.apache.maven.RepositoryUtils;
@@ -1477,7 +1481,7 @@ public void addAttachedArtifact( Artifact artifact )
         for ( int ax = 0; ax < attachedArtifacts.size(); ax++ )
         {
             Artifact a = attachedArtifacts.get( ax );
-            if ( a.equals( artifact ))
+            if ( a.equals( artifact ) )
             {
                 if ( logger != null )
                 {

maven-core/src/main/java/org/apache/maven/project/ProjectBuildingRequest.java

@@ -79,7 +79,7 @@ public interface ProjectBuildingRequest
      */
     Properties getUserProperties();
 
-    void setProject(MavenProject mavenProject);
+    void setProject( MavenProject mavenProject );
 
     MavenProject getProject();
 

maven-core/src/main/java/org/apache/maven/repository/RepositorySystem.java

@@ -42,17 +42,17 @@
  */
 public interface RepositorySystem
 {
-    final String DEFAULT_LOCAL_REPO_ID = "local";
+    String DEFAULT_LOCAL_REPO_ID = "local";
 
-    final String userHome = System.getProperty( "user.home" );
+    String userHome = System.getProperty( "user.home" );
 
-    final File userMavenConfigurationHome = new File( userHome, ".m2" );
+    File userMavenConfigurationHome = new File( userHome, ".m2" );
 
-    final File defaultUserLocalRepository = new File( userMavenConfigurationHome, "repository" );
+    File defaultUserLocalRepository = new File( userMavenConfigurationHome, "repository" );
 
-    final String DEFAULT_REMOTE_REPO_ID = "central";
+    String DEFAULT_REMOTE_REPO_ID = "central";
 
-    final String DEFAULT_REMOTE_REPO_URL = "http://repo.maven.apache.org/maven2";
+    String DEFAULT_REMOTE_REPO_URL = "http://repo.maven.apache.org/maven2";
 
     Artifact createArtifact( String groupId, String artifactId, String version, String packaging );
 

maven-core/src/main/resources/META-INF/plexus/components.xml

@@ -129,10 +129,10 @@ under the License.
         </phases>
         <default-phases>
           <site>
-            org.apache.maven.plugins:maven-site-plugin:3.1:site
+            org.apache.maven.plugins:maven-site-plugin:3.2:site
           </site>
           <site-deploy>
-            org.apache.maven.plugins:maven-site-plugin:3.1:deploy
+            org.apache.maven.plugins:maven-site-plugin:3.2:deploy
           </site-deploy>
         </default-phases>
         <!-- END SNIPPET: site -->

maven-core/src/main/resources/META-INF/plexus/default-bindings.xml

@@ -258,7 +258,7 @@ Mappings to default lifecycle, specific for each packaging.
                 org.apache.maven.plugins:maven-surefire-plugin:2.12.4:test
               </test>
               <package>
-                org.apache.maven.plugins:maven-war-plugin:2.3:war
+                org.apache.maven.plugins:maven-war-plugin:2.2:war
               </package>
               <install>
                 org.apache.maven.plugins:maven-install-plugin:2.4:install

maven-core/src/site/apt/index.apt

@@ -26,4 +26,10 @@ Maven Core
  ({{{./xref/org/apache/maven/plugin/internal/DefaultMavenPluginManager.html}source}}),
 
  * {{{./apidocs/org/apache/maven/plugin/PluginParameterExpressionEvaluator.html}PluginParameterExpressionEvaluator}}, used to
- evaluate plugin parameters values during Mojo configuration.
+ evaluate plugin parameters values during Mojo configuration,
+
+ * {{{/guides/mini/guide-maven-classloading.html}classloader hierarchy}} done by <<<ClassRealmManager>>> component
+ ({{{./apidocs/org/apache/maven/classrealm/ClassRealmManager.html}javadoc}}),
+ with its <<<DefaultClassRealmManager>>> implementation
+ ({{{./xref/org/apache/maven/classrealm/DefaultClassRealmManager.html}source}}), using
+ {{{http://plexus.codehaus.org/plexus-classworlds/}Plexus Classworlds}}.

maven-core/src/test/java/org/apache/maven/plugin/internal/DefaultLegacySupportTest.java

@@ -0,0 +1,74 @@
+package org.apache.maven.plugin.internal;
+/*
+ * 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.
+ */
+
+import junit.framework.TestCase;
+import org.apache.maven.execution.DefaultMavenExecutionRequest;
+import org.apache.maven.execution.MavenExecutionRequest;
+import org.apache.maven.execution.MavenSession;
+
+import java.util.concurrent.CountDownLatch;
+
+/**
+ * @author Kristian Rosenvold
+ */
+public class DefaultLegacySupportTest extends TestCase {
+    final CountDownLatch latch = new CountDownLatch(1);
+    final DefaultLegacySupport defaultLegacySupport = new DefaultLegacySupport();
+
+    public void testSetSession() throws Exception {
+
+        MavenExecutionRequest mavenExecutionRequest = new DefaultMavenExecutionRequest();
+        MavenSession m1 = new MavenSession(null, null, mavenExecutionRequest, null);
+        defaultLegacySupport.setSession(m1);
+
+        MyRunnable myRunnable = new MyRunnable();
+        Thread thread = new Thread(myRunnable);
+        thread.start();
+
+        MavenSession m2 = new MavenSession(null, null, mavenExecutionRequest, null);
+        defaultLegacySupport.setSession(m2);
+        latch.countDown();
+        thread.join();
+        assertNull( myRunnable.getSession());
+    }
+
+
+    class MyRunnable implements Runnable {
+
+        private volatile MavenSession session;
+
+        public void run() {
+            try
+            {
+                latch.await();
+            }
+            catch (InterruptedException ingore)
+            {
+                // Test may fail if we get interrupted
+            }
+            session = defaultLegacySupport.getSession();
+        }
+
+        public MavenSession getSession() {
+            return session;
+        }
+    }
+
+}

maven-embedder/pom.xml

@@ -74,6 +74,16 @@
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-simple</artifactId>
+      <optional>true</optional>
+    </dependency>      
+    <dependency>
+      <groupId>ch.qos.logback</groupId>
+      <artifactId>logback-classic</artifactId>
+      <optional>true</optional>
+    </dependency>      
     <!-- CLI -->
     <dependency>
       <groupId>commons-cli</groupId>

maven-embedder/src/main/java/org/apache/maven/cli/CLIManager.java

@@ -97,6 +97,8 @@ public class CLIManager
 
     public static final String THREADS = "T";
 
+    public static final String LEGACY_LOCAL_REPOSITORY ="llr";
+
     protected Options options;
 
     @SuppressWarnings( "static-access" )
@@ -133,9 +135,9 @@ public CLIManager()
         options.addOption( OptionBuilder.withLongOpt( "encrypt-master-password" ).hasArg().withDescription( "Encrypt master security password" ).create( ENCRYPT_MASTER_PASSWORD ) );
         options.addOption( OptionBuilder.withLongOpt( "encrypt-password" ).hasArg().withDescription( "Encrypt server password" ).create( ENCRYPT_PASSWORD ) );
         options.addOption( OptionBuilder.withLongOpt( "threads" ).hasArg().withDescription( "Thread count, for instance 2.0C where C is core multiplied" ).create( THREADS ) );
+        options.addOption( OptionBuilder.withLongOpt( "legacy-local-repository" ).withDescription( "Use Maven 2 Legacy Local Repository behaviour, ie no use of _maven.repositories. Can also be activated by using -Dmaven.legacyLocalRepo=true" ).create( LEGACY_LOCAL_REPOSITORY ) );
 
         // Adding this back in for compatibility with the verifier that hard codes this option.
-
         options.addOption( OptionBuilder.withLongOpt( "no-plugin-registry" ).withDescription( "Ineffective, only kept for backward compatibility" ).create( "npr" ) );
         options.addOption( OptionBuilder.withLongOpt( "check-plugin-updates" ).withDescription( "Ineffective, only kept for backward compatibility" ).create( "cpu" ) );
         options.addOption( OptionBuilder.withLongOpt( "update-plugins" ).withDescription( "Ineffective, only kept for backward compatibility" ).create( "up" ) );

maven-embedder/src/main/java/org/apache/maven/cli/CLIReportingUtils.java

@@ -53,11 +53,15 @@ public static String showVersion()
         Properties properties = getBuildProperties();
         StringBuffer version = new StringBuffer();
         version.append( createMavenVersionString( properties ) ).append( LS );
-        version.append( reduce( properties.getProperty( "distributionShortName" ) + " home: " + System.getProperty( "maven.home", "<unknown maven home>" ) ) ).append( LS );
+        version.append( reduce( properties.getProperty( "distributionShortName" ) + " home: "
-        version.append( "Java version: " + System.getProperty( "java.version", "<unknown java version>" ) + ", vendor: " + System.getProperty( "java.vendor", "<unknown vendor>" ) ).append( LS );
+                            + System.getProperty( "maven.home", "<unknown maven home>" ) ) ).append( LS );
+        version.append( "Java version: " + System.getProperty( "java.version", "<unknown java version>" )
+                            + ", vendor: " + System.getProperty( "java.vendor", "<unknown vendor>" ) ).append( LS );
         version.append( "Java home: " + System.getProperty( "java.home", "<unknown java home>" ) ).append( LS );
-        version.append( "Default locale: " + Locale.getDefault() + ", platform encoding: " + System.getProperty( "file.encoding", "<unknown encoding>" ) ).append( LS );
+        version.append( "Default locale: " + Locale.getDefault() + ", platform encoding: "
-        version.append( "OS name: \"" + Os.OS_NAME + "\", version: \"" + Os.OS_VERSION + "\", arch: \"" + Os.OS_ARCH + "\", family: \"" + Os.OS_FAMILY + "\"" );
+                            + System.getProperty( "file.encoding", "<unknown encoding>" ) ).append( LS );
+        version.append( "OS name: \"" + Os.OS_NAME + "\", version: \"" + Os.OS_VERSION + "\", arch: \"" + Os.OS_ARCH
+            + "\", family: \"" + Os.OS_FAMILY + "\"" );
         return version.toString();
     }
 
@@ -79,7 +83,7 @@ static String createMavenVersionString( Properties buildProperties )
         if ( rev != null || timestamp != null )
         {
             msg += " (";
-            msg += ( rev != null ? "r" + rev : "" );
+            msg += ( rev != null ? rev : "" );
             if ( timestamp != null )
             {
                 SimpleDateFormat fmt = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ssZ" );

maven-embedder/src/main/java/org/apache/maven/cli/MavenCli.java

@@ -39,7 +39,10 @@
 import org.apache.maven.Maven;
 import org.apache.maven.cli.event.DefaultEventSpyContext;
 import org.apache.maven.cli.event.ExecutionEventLogger;
+import org.apache.maven.cli.logging.Slf4jConfiguration;
+import org.apache.maven.cli.logging.Slf4jConfigurationFactory;
 import org.apache.maven.cli.logging.Slf4jLoggerManager;
+import org.apache.maven.cli.logging.Slf4jStdoutLogger;
 import org.apache.maven.cli.transfer.ConsoleMavenTransferListener;
 import org.apache.maven.cli.transfer.QuietMavenTransferListener;
 import org.apache.maven.cli.transfer.Slf4jMavenTransferListener;
@@ -207,6 +210,7 @@ public int doMain( CliRequest cliRequest )
             settings( cliRequest );
             populateRequest( cliRequest );
             encryption( cliRequest );
+            repository( cliRequest );
             return execute( cliRequest );
         }
         catch ( ExitException e )
@@ -232,7 +236,7 @@ public int doMain( CliRequest cliRequest )
         }
         finally
         {
-            if (localContainer != null)
+            if ( localContainer != null )
             {
                 localContainer.dispose();
             }
@@ -261,6 +265,12 @@ private void initialize( CliRequest cliRequest )
     private void cli( CliRequest cliRequest )
         throws Exception
     {
+        //
+        // Parsing errors can happen during the processing of the arguments and we prefer not having to check if the logger is null
+        // and construct this so we can use an SLF4J logger everywhere.
+        //
+        slf4jLogger = new Slf4jStdoutLogger();
+
         CLIManager cliManager = new CLIManager();
 
         try
@@ -287,36 +297,40 @@ private void cli( CliRequest cliRequest )
         }
     }    
 
-    //
+    /**
-    // All logging is handled by SFL4J
+     * configure logging
-    //
+     */
     private void logging( CliRequest cliRequest )
     {
         cliRequest.debug = cliRequest.commandLine.hasOption( CLIManager.DEBUG );
         cliRequest.quiet = !cliRequest.debug && cliRequest.commandLine.hasOption( CLIManager.QUIET );
         cliRequest.showErrors = cliRequest.debug || cliRequest.commandLine.hasOption( CLIManager.ERRORS );
 
+        slf4jLoggerFactory = LoggerFactory.getILoggerFactory();
+        Slf4jConfiguration slf4jConfiguration = Slf4jConfigurationFactory.getConfiguration( slf4jLoggerFactory );
+
         if ( cliRequest.debug )
         {
             cliRequest.request.setLoggingLevel( MavenExecutionRequest.LOGGING_LEVEL_DEBUG );
-            System.setProperty( "org.slf4j.simpleLogger.defaultLogLevel", "debug" );            
+            slf4jConfiguration.setRootLoggerLevel( Slf4jConfiguration.Level.DEBUG );
         }
         else if ( cliRequest.quiet )
         {
             cliRequest.request.setLoggingLevel( MavenExecutionRequest.LOGGING_LEVEL_ERROR );
-            System.setProperty( "org.slf4j.simpleLogger.defaultLogLevel", "error" );            
+            slf4jConfiguration.setRootLoggerLevel( Slf4jConfiguration.Level.ERROR );
         }
         else
         {
             cliRequest.request.setLoggingLevel( MavenExecutionRequest.LOGGING_LEVEL_INFO );
-            System.setProperty( "org.slf4j.simpleLogger.defaultLogLevel", "info" );
+            slf4jConfiguration.setRootLoggerLevel( Slf4jConfiguration.Level.INFO );
         }
 
         if ( cliRequest.commandLine.hasOption( CLIManager.LOG_FILE ) )
         {
             File logFile = new File( cliRequest.commandLine.getOptionValue( CLIManager.LOG_FILE ) );
             logFile = resolveFile( logFile, cliRequest.workingDirectory );
-            System.setProperty( "org.slf4j.simpleLogger.logFile", logFile.getAbsolutePath() );
+
+            // redirect stdout and stderr to file
             try
             {
                 PrintStream ps = new PrintStream( new FileOutputStream( logFile ) );
@@ -331,8 +345,9 @@ else if ( cliRequest.quiet )
             }
         }
 
+        slf4jConfiguration.activate();
+
         plexusLoggerManager = new Slf4jLoggerManager();
-        slf4jLoggerFactory = LoggerFactory.getILoggerFactory();
         slf4jLogger = slf4jLoggerFactory.getLogger( this.getClass().getName() );
     }
 
@@ -385,12 +400,10 @@ private PlexusContainer container( CliRequest cliRequest )
 
         container = new DefaultPlexusContainer( cc, new AbstractModule()
         {
-
             protected void configure()
             {
                 bind( ILoggerFactory.class ).toInstance( slf4jLoggerFactory );
             }
-
         } );
 
         // NOTE: To avoid inconsistencies, we'll use the TCCL exclusively for lookups
@@ -526,6 +539,15 @@ else if ( cliRequest.commandLine.hasOption( CLIManager.ENCRYPT_PASSWORD ) )
         }
     }
 
+    private void repository( CliRequest cliRequest )
+        throws Exception
+    {
+        if ( cliRequest.commandLine.hasOption( CLIManager.LEGACY_LOCAL_REPOSITORY ) || Boolean.getBoolean( "maven.legacyLocalRepo" ) )
+        {
+           cliRequest.request.setUseLegacyLocalRepository( true );
+        }
+    }
+
     private int execute( CliRequest cliRequest )
     {
         eventSpyDispatcher.onEvent( cliRequest.request );
@@ -887,7 +909,7 @@ else if ( request.isInteractiveMode() && !cliRequest.commandLine.hasOption( CLIM
             transferListener = getBatchTransferListener();
         }
 
-        ExecutionListener executionListener = new ExecutionEventLogger( slf4jLogger );
+        ExecutionListener executionListener = new ExecutionEventLogger();
         executionListener = eventSpyDispatcher.chainListener( executionListener );
 
         String alternatePomFile = null;
@@ -1153,7 +1175,7 @@ protected TransferListener getConsoleTransferListener()
     
     protected TransferListener getBatchTransferListener()
     {
-        return new Slf4jMavenTransferListener( slf4jLogger );
+        return new Slf4jMavenTransferListener();
     }
     
     protected void customizeContainer( PlexusContainer container )

maven-embedder/src/main/java/org/apache/maven/cli/event/ExecutionEventLogger.java

@@ -31,9 +31,10 @@
 import org.apache.maven.plugin.MojoExecution;
 import org.apache.maven.project.MavenProject;
 import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
- * Logs execution events to a user-supplied logger.
+ * Logs execution events to logger, eventually user-supplied.
  *
  * @author Benjamin Bentmann
  */
@@ -44,6 +45,12 @@ public class ExecutionEventLogger
 
     private static final int LINE_LENGTH = 72;
 
+    public ExecutionEventLogger()
+    {
+        logger = LoggerFactory.getLogger( ExecutionEventLogger.class );
+    }
+
+    // TODO should we deprecate?
     public ExecutionEventLogger( Logger logger )
     {
         if ( logger == null )

maven-embedder/src/main/java/org/apache/maven/cli/logging/BaseSlf4jConfiguration.java

@@ -0,0 +1,44 @@
+package org.apache.maven.cli.logging;
+
+/*
+ * 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.
+ */
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Abstract implementation.
+ * 
+ * @author Hervé Boutemy
+ */
+public class BaseSlf4jConfiguration
+    implements Slf4jConfiguration
+{
+    private final Logger logger = LoggerFactory.getLogger( BaseSlf4jConfiguration.class );
+
+    public void setRootLoggerLevel( Level level )
+    {
+        logger.warn( "setRootLoggerLevel: operation not supported" );
+    }
+
+    public void activate()
+    {
+        logger.warn( "reset(): operation not supported" );
+    }
+}

maven-embedder/src/main/java/org/apache/maven/cli/logging/PrintStreamLogger.java

@@ -1,187 +0,0 @@
-package org.apache.maven.cli.logging;
-
-/*
- * 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.
- */
-
-import java.io.PrintStream;
-
-import org.apache.maven.Maven;
-import org.codehaus.plexus.logging.AbstractLogger;
-import org.codehaus.plexus.logging.Logger;
-
-/**
- * Logs to a user-supplied {@link PrintStream}.
- * 
- * @author Benjamin Bentmann
- */
-public class PrintStreamLogger
-    extends AbstractLogger
-{
-
-    public interface Provider
-    {
-        PrintStream getStream();
-    }
-
-    private Provider provider;
-
-    private static final String FATAL_ERROR = "[FATAL] ";
-
-    private static final String ERROR = "[ERROR] ";
-
-    private static final String WARNING = "[WARNING] ";
-
-    private static final String INFO = "[INFO] ";
-
-    private static final String DEBUG = "[DEBUG] ";
-
-    public PrintStreamLogger( Provider provider )
-    {
-        super( Logger.LEVEL_INFO, Maven.class.getName() );
-
-        if ( provider == null )
-        {
-            throw new IllegalArgumentException( "output stream provider missing" );
-        }
-        this.provider = provider;
-    }
-
-    public PrintStreamLogger( PrintStream out )
-    {
-        super( Logger.LEVEL_INFO, Maven.class.getName() );
-
-        setStream( out );
-    }
-
-    public void setStream( final PrintStream out )
-    {
-        if ( out == null )
-        {
-            throw new IllegalArgumentException( "output stream missing" );
-        }
-
-        this.provider = new Provider()
-        {
-            public PrintStream getStream()
-            {
-                return out;
-            }
-        };
-    }
-
-    public void debug( String message, Throwable throwable )
-    {
-        if ( isDebugEnabled() )
-        {
-            PrintStream out = provider.getStream();
-
-            out.print( DEBUG );
-            out.println( message );
-
-            if ( null != throwable )
-            {
-                throwable.printStackTrace( out );
-            }
-        }
-    }
-
-    public void info( String message, Throwable throwable )
-    {
-        if ( isInfoEnabled() )
-        {
-            PrintStream out = provider.getStream();
-
-            out.print( INFO );
-            out.println( message );
-
-            if ( null != throwable )
-            {
-                throwable.printStackTrace( out );
-            }
-        }
-    }
-
-    public void warn( String message, Throwable throwable )
-    {
-        if ( isWarnEnabled() )
-        {
-            PrintStream out = provider.getStream();
-
-            out.print( WARNING );
-            out.println( message );
-
-            if ( null != throwable )
-            {
-                throwable.printStackTrace( out );
-            }
-        }
-    }
-
-    public void error( String message, Throwable throwable )
-    {
-        if ( isErrorEnabled() )
-        {
-            PrintStream out = provider.getStream();
-
-            out.print( ERROR );
-            out.println( message );
-
-            if ( null != throwable )
-            {
-                throwable.printStackTrace( out );
-            }
-        }
-    }
-
-    public void fatalError( String message, Throwable throwable )
-    {
-        if ( isFatalErrorEnabled() )
-        {
-            PrintStream out = provider.getStream();
-
-            out.print( FATAL_ERROR );
-            out.println( message );
-
-            if ( null != throwable )
-            {
-                throwable.printStackTrace( out );
-            }
-        }
-    }
-
-    public void close()
-    {
-        PrintStream out = provider.getStream();
-
-        if ( out == System.out || out == System.err )
-        {
-            out.flush();
-        }
-        else
-        {
-            out.close();
-        }
-    }
-
-    public Logger getChildLogger( String arg0 )
-    {
-        return this;
-    }
-
-}

maven-embedder/src/main/java/org/apache/maven/cli/logging/Slf4jConfiguration.java

@@ -0,0 +1,43 @@
+package org.apache.maven.cli.logging;
+
+/*
+ * 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.
+ */
+
+/**
+ * Interface for configuration operations on loggers, which are not available in slf4j, then require per-slf4f-binding
+ * implementation.
+ * 
+ * @author Hervé Boutemy
+ */
+public interface Slf4jConfiguration
+{
+    public static enum Level { DEBUG, INFO, ERROR }
+
+    /**
+     * Set root logging level.
+     *
+     * @param level the level
+     */
+    void setRootLoggerLevel( Level level );
+
+    /**
+     * Activate logging implementation configuration (if necessary).
+     */
+    void activate();
+}

maven-embedder/src/main/java/org/apache/maven/cli/logging/Slf4jConfigurationFactory.java

@@ -0,0 +1,81 @@
+package org.apache.maven.cli.logging;
+
+/*
+ * 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.
+ */
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.Enumeration;
+import java.util.Properties;
+
+import org.codehaus.plexus.util.PropertyUtils;
+import org.slf4j.ILoggerFactory;
+
+/**
+ * Slf4jConfiguration factory, loading implementations from <code>META-INF/maven/slf4j-configuration.properties</code>
+ * configuration files in class loader.
+ *
+ * @author Hervé Boutemy
+ */
+public class Slf4jConfigurationFactory
+{
+    public static final String RESOURCE = "META-INF/maven/slf4j-configuration.properties";
+
+    public static Slf4jConfiguration getConfiguration( ILoggerFactory loggerFactory )
+    {
+        try
+        {
+            Enumeration<URL> resources = Slf4jConfigurationFactory.class.getClassLoader().getResources( RESOURCE );
+
+            String key = loggerFactory.getClass().getCanonicalName();
+
+            while ( resources.hasMoreElements() )
+            {
+                URL resource = resources.nextElement();
+
+                Properties conf = PropertyUtils.loadProperties( resource.openStream() );
+
+                String impl = conf.getProperty( key );
+
+                if ( impl != null )
+                {
+                    return (Slf4jConfiguration) Class.forName( impl ).newInstance();
+                }
+            }
+        }
+        catch ( IOException e )
+        {
+            e.printStackTrace();
+        }
+        catch ( InstantiationException e )
+        {
+            e.printStackTrace();
+        }
+        catch ( IllegalAccessException e )
+        {
+            e.printStackTrace();
+        }
+        catch ( ClassNotFoundException e )
+        {
+            e.printStackTrace();
+        }
+
+        return new BaseSlf4jConfiguration();
+    }
+}

maven-embedder/src/main/java/org/apache/maven/cli/logging/Slf4jLogger.java

@@ -114,7 +114,7 @@ public boolean isFatalErrorEnabled()
     }
 
     /**
-     * <b>Warning</b>: ignored (always return <code>0</code>).
+     * <b>Warning</b>: ignored (always return <code>0 == Logger.LEVEL_DEBUG</code>).
      */
     public int getThreshold()
     {
@@ -129,7 +129,7 @@ public void setThreshold( int threshold )
     }
 
     /**
-     * <b>Warning</b>: ignored (always return <code>0</code>).
+     * <b>Warning</b>: ignored (always return <code>null</code>).
      */
     public Logger getChildLogger( String name )
     {

maven-embedder/src/main/java/org/apache/maven/cli/logging/Slf4jStdoutLogger.java

@@ -0,0 +1,303 @@
+package org.apache.maven.cli.logging;
+
+/*
+ * 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.
+ */
+
+import java.io.PrintStream;
+
+import org.slf4j.Logger;
+import org.slf4j.Marker;
+
+public class Slf4jStdoutLogger
+    implements Logger
+{
+    private static final String ERROR = "[ERROR] ";
+
+    private PrintStream out = System.out;
+
+    //
+    // These are the only methods we need in our primordial logger
+    //    
+    public void error( String msg )
+    {
+        out.print( ERROR );
+        out.println( msg );
+    }
+
+    public void error( String msg, Throwable t )
+    {
+        error( msg );
+
+        if ( null != t )
+        {
+            t.printStackTrace( out );
+        }        
+    }    
+
+    //
+    // Don't need any of this
+    //    
+    public String getName()
+    {
+        return null;
+    }
+
+    public boolean isTraceEnabled()
+    {
+        return false;
+    }
+
+    public void trace( String msg )
+    {
+    }
+
+    public void trace( String format, Object arg )
+    {
+    }
+
+    public void trace( String format, Object arg1, Object arg2 )
+    {
+    }
+
+    public void trace( String format, Object... arguments )
+    {
+    }
+
+    public void trace( String msg, Throwable t )
+    {
+    }
+
+    public boolean isTraceEnabled( Marker marker )
+    {
+        return false;
+    }
+
+    public void trace( Marker marker, String msg )
+    {
+    }
+
+    public void trace( Marker marker, String format, Object arg )
+    {
+    }
+
+    public void trace( Marker marker, String format, Object arg1, Object arg2 )
+    {
+    }
+
+    public void trace( Marker marker, String format, Object... argArray )
+    {
+    }
+
+    public void trace( Marker marker, String msg, Throwable t )
+    {
+    }
+
+    public boolean isDebugEnabled()
+    {
+        return false;
+    }
+
+    public void debug( String msg )
+    {
+    }
+
+    public void debug( String format, Object arg )
+    {
+    }
+
+    public void debug( String format, Object arg1, Object arg2 )
+    {
+    }
+
+    public void debug( String format, Object... arguments )
+    {
+    }
+
+    public void debug( String msg, Throwable t )
+    {
+    }
+
+    public boolean isDebugEnabled( Marker marker )
+    {
+        return false;
+    }
+
+    public void debug( Marker marker, String msg )
+    {
+    }
+
+    public void debug( Marker marker, String format, Object arg )
+    {
+    }
+
+    public void debug( Marker marker, String format, Object arg1, Object arg2 )
+    {
+    }
+
+    public void debug( Marker marker, String format, Object... arguments )
+    {
+    }
+
+    public void debug( Marker marker, String msg, Throwable t )
+    {
+    }
+
+    public boolean isInfoEnabled()
+    {
+        return false;
+    }
+
+    public void info( String msg )
+    {
+    }
+
+    public void info( String format, Object arg )
+    {
+    }
+
+    public void info( String format, Object arg1, Object arg2 )
+    {
+    }
+
+    public void info( String format, Object... arguments )
+    {
+    }
+
+    public void info( String msg, Throwable t )
+    {
+    }
+
+    public boolean isInfoEnabled( Marker marker )
+    {
+        return false;
+    }
+
+    public void info( Marker marker, String msg )
+    {
+    }
+
+    public void info( Marker marker, String format, Object arg )
+    {
+    }
+
+    public void info( Marker marker, String format, Object arg1, Object arg2 )
+    {
+    }
+
+    public void info( Marker marker, String format, Object... arguments )
+    {
+    }
+
+    public void info( Marker marker, String msg, Throwable t )
+    {
+    }
+
+    public boolean isWarnEnabled()
+    {
+        return false;
+    }
+
+    public void warn( String msg )
+    {
+    }
+
+    public void warn( String format, Object arg )
+    {
+    }
+
+    public void warn( String format, Object... arguments )
+    {
+    }
+
+    public void warn( String format, Object arg1, Object arg2 )
+    {
+    }
+
+    public void warn( String msg, Throwable t )
+    {
+    }
+
+    public boolean isWarnEnabled( Marker marker )
+    {
+        return false;
+    }
+
+    public void warn( Marker marker, String msg )
+    {
+    }
+
+    public void warn( Marker marker, String format, Object arg )
+    {
+    }
+
+    public void warn( Marker marker, String format, Object arg1, Object arg2 )
+    {
+    }
+
+    public void warn( Marker marker, String format, Object... arguments )
+    {
+    }
+
+    public void warn( Marker marker, String msg, Throwable t )
+    {
+    }
+
+    public boolean isErrorEnabled()
+    {
+        return false;
+    }
+
+    public void error( String format, Object arg )
+    {
+    }
+
+    public void error( String format, Object arg1, Object arg2 )
+    {
+    }
+
+    public void error( String format, Object... arguments )
+    {
+    }
+
+    public boolean isErrorEnabled( Marker marker )
+    {
+        return false;
+    }
+
+    public void error( Marker marker, String msg )
+    {
+    }
+
+    public void error( Marker marker, String format, Object arg )
+    {
+    }
+
+    public void error( Marker marker, String format, Object arg1, Object arg2 )
+    {
+    }
+
+    public void error( Marker marker, String format, Object... arguments )
+    {
+    }
+
+    public void error( Marker marker, String msg, Throwable t )
+    {
+    }
+
+}

maven-embedder/src/main/java/org/apache/maven/cli/logging/impl/Log4j2Configuration.java

@@ -0,0 +1,58 @@
+package org.apache.maven.cli.logging.impl;
+
+/*
+ * 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.
+ */
+
+import org.apache.maven.cli.logging.BaseSlf4jConfiguration;
+
+/**
+ * Configuration for slf4j-log4j2.
+ * 
+ * @author Hervé Boutemy
+ */
+public class Log4j2Configuration
+    extends BaseSlf4jConfiguration
+{
+    @Override
+    public void setRootLoggerLevel( Level level )
+    {
+        String value = "info";
+        switch ( level )
+        {
+            case DEBUG:
+                value = "debug";
+                break;
+            
+            case INFO:
+                value = "info";
+                break;
+
+            case ERROR:
+                value = "error";
+                break;
+        }
+        System.setProperty( "maven.logging.root.level", value );
+    }
+
+    @Override
+    public void activate()
+    {
+        // no op
+    }
+}

maven-embedder/src/main/java/org/apache/maven/cli/logging/impl/LogbackConfiguration.java

@@ -0,0 +1,60 @@
+package org.apache.maven.cli.logging.impl;
+
+/*
+ * 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.
+ */
+
+import org.apache.maven.cli.logging.BaseSlf4jConfiguration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Configuration for slf4j-logback.
+ * 
+ * @author Hervé Boutemy
+ */
+public class LogbackConfiguration
+    extends BaseSlf4jConfiguration
+{
+    @Override
+    public void setRootLoggerLevel( Level level )
+    {
+        ch.qos.logback.classic.Level value = ch.qos.logback.classic.Level.INFO;
+        switch ( level )
+        {
+            case DEBUG:
+                value = ch.qos.logback.classic.Level.DEBUG;
+                break;
+            
+            case INFO:
+                value = ch.qos.logback.classic.Level.INFO;
+                break;
+
+            case ERROR:
+                value = ch.qos.logback.classic.Level.ERROR;
+                break;
+        }
+        ( (ch.qos.logback.classic.Logger) LoggerFactory.getLogger( Logger.ROOT_LOGGER_NAME ) ).setLevel( value );
+    }
+
+    @Override
+    public void activate()
+    {
+        // no op
+    }
+}

maven-embedder/src/main/java/org/apache/maven/cli/logging/impl/Slf4jSimpleConfiguration.java

@@ -0,0 +1,62 @@
+package org.apache.maven.cli.logging.impl;
+
+/*
+ * 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.
+ */
+
+import org.apache.maven.cli.logging.BaseSlf4jConfiguration;
+import org.slf4j.MavenSlf4jFriend;
+import org.slf4j.impl.MavenSlf4jSimpleFriend;
+
+/**
+ * Configuration for slf4j-simple.
+ * 
+ * @author Hervé Boutemy
+ */
+public class Slf4jSimpleConfiguration
+    extends BaseSlf4jConfiguration
+{
+    @Override
+    public void setRootLoggerLevel( Level level )
+    {
+        String value = "info";
+        switch ( level )
+        {
+            case DEBUG:
+                value = "debug";
+                break;
+            
+            case INFO:
+                value = "info";
+                break;
+
+            case ERROR:
+                value = "error";
+                break;
+        }
+        System.setProperty( "org.slf4j.simpleLogger.defaultLogLevel", value );
+    }
+
+    @Override
+    public void activate()
+    {
+        // property for root logger level or System.out redirection need to be taken into account
+        MavenSlf4jFriend.reset();
+        MavenSlf4jSimpleFriend.init();
+    }
+}

maven-embedder/src/main/java/org/apache/maven/cli/transfer/Slf4jMavenTransferListener.java

@@ -28,13 +28,20 @@
 import org.eclipse.aether.transfer.TransferEvent;
 import org.eclipse.aether.transfer.TransferResource;
 import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class Slf4jMavenTransferListener
     extends AbstractTransferListener
 {
 
-    protected Logger out;
+    protected final Logger out;
 
+    public Slf4jMavenTransferListener()
+    {
+        this.out = LoggerFactory.getLogger( Slf4jMavenTransferListener.class );
+    }
+
+    // TODO should we deprecate?
     public Slf4jMavenTransferListener( Logger out )
     {
         this.out = out;

maven-embedder/src/main/java/org/slf4j/MavenSlf4jFriend.java

@@ -0,0 +1,35 @@
+package org.slf4j;
+
+/*
+ * 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.
+ */
+
+/**
+ * Utility for Maven to access Slf4j internals through package access.
+ * Use with precaution, since this is not normally intended for production use.
+ */
+public class MavenSlf4jFriend
+{
+    /**
+     * Reset Slf4j internal state.
+     */
+    public static void reset()
+    {
+        LoggerFactory.reset();
+    }
+}

maven-embedder/src/main/java/org/slf4j/impl/MavenSlf4jSimpleFriend.java

@@ -0,0 +1,32 @@
+package org.slf4j.impl;
+
+/*
+ * 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.
+ */
+
+/**
+ * Utility for Maven to access Slf4j-Simple internals through package access.
+ * Use with precaution, since this is not normally intended for production use.
+ */
+public class MavenSlf4jSimpleFriend
+{
+    public static void init()
+    {
+        SimpleLogger.init();
+    }
+}

maven-embedder/src/main/resources/META-INF/maven/slf4j-configuration.properties

@@ -0,0 +1,5 @@
+# key = Slf4j effective logger factory implementation
+# value = corresponding o.a.m.cli.logging.Slf4jConfiguration class
+org.slf4j.impl.SimpleLoggerFactory org.apache.maven.cli.logging.impl.Slf4jSimpleConfiguration
+org.slf4j.helpers.Log4JLoggerFactory org.apache.maven.cli.logging.impl.Log4j2Configuration
+ch.qos.logback.classic.LoggerContext org.apache.maven.cli.logging.impl.LogbackConfiguration

maven-embedder/src/site/apt/logging.apt

@@ -22,7 +22,7 @@ Maven Logging
 
 * Getting Logger Instance
 
- Plexus Logger can be injected in Plexus component using Plexus annotations
+ Plexus Logger and LoggerManager can be injected in Plexus component using Plexus annotations
 
 <<<<<<< HEAD
 +------
@@ -39,6 +39,9 @@ public class DefaultMyComponent
 {
     @Requirement
     private Logger logger;
+
+    @Requirement
+    private LoggerManager loggerManager;
 }
 <<<<<<< HEAD
 +------

maven-model-builder/src/main/java/org/apache/maven/model/building/DefaultModelBuilder.java

@@ -278,6 +278,8 @@ public ModelBuildingResult build( ModelBuildingRequest request )
 
             modelNormalizer.mergeDuplicates( tmpModel, request, problems );
 
+            profileActivationContext.setProjectProperties( tmpModel.getProperties() );
+
             List<Profile> activePomProfiles =
                 profileSelector.getActiveProfiles( rawModel.getProfiles(), profileActivationContext, problems );
             currentData.setActiveProfiles( activePomProfiles );
@@ -317,7 +319,7 @@ else if ( !parentIds.add( currentData.getId() ) )
                 }
                 message += currentData.getId();
 
-                problems.add( new ModelProblemCollectorRequest(ModelProblem.Severity.FATAL, ModelProblem.Version.BASE).setMessage(message));
+                problems.add( new ModelProblemCollectorRequest( ModelProblem.Severity.FATAL, ModelProblem.Version.BASE ).setMessage( message ) );
                 throw problems.newModelBuildingException();
             }
         }
@@ -409,7 +411,7 @@ private ModelBuildingResult build( ModelBuildingRequest request, ModelBuildingRe
 
         modelValidator.validateEffectiveModel( resultModel, request, problems );
 
-        if ( hasModelErrors(problems) )
+        if ( hasModelErrors( problems ) )
         {
             throw problems.newModelBuildingException();
         }
@@ -471,15 +473,15 @@ private Model readModel( ModelSource modelSource, File pomFile, ModelBuildingReq
 
                 if ( pomFile != null )
                 {
-                    problems.add( new ModelProblemCollectorRequest(Severity.ERROR, Version.V20)
+                    problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.V20 )
-                            .setMessage("Malformed POM " + modelSource.getLocation() + ": " + e.getMessage())
+                            .setMessage( "Malformed POM " + modelSource.getLocation() + ": " + e.getMessage() )
-                            .setException(e ));
+                            .setException( e ) );
                 }
                 else
                 {
-                    problems.add( new ModelProblemCollectorRequest(Severity.WARNING, Version.V20)
+                    problems.add( new ModelProblemCollectorRequest( Severity.WARNING, Version.V20 )
-                            .setMessage("Malformed POM " + modelSource.getLocation() + ": " + e.getMessage())
+                            .setMessage( "Malformed POM " + modelSource.getLocation() + ": " + e.getMessage() )
-                            .setException(e));
+                            .setException( e ) );
                 }
             }
 
@@ -491,9 +493,9 @@ private Model readModel( ModelSource modelSource, File pomFile, ModelBuildingReq
         }
         catch ( ModelParseException e )
         {
-            problems.add( new ModelProblemCollectorRequest(Severity.FATAL, Version.BASE)
+            problems.add( new ModelProblemCollectorRequest( Severity.FATAL, Version.BASE )
-                    .setMessage("Non-parseable POM " + modelSource.getLocation() + ": " + e.getMessage())
+                    .setMessage( "Non-parseable POM " + modelSource.getLocation() + ": " + e.getMessage() )
-                    .setException(e));
+                    .setException( e ) );
             throw problems.newModelBuildingException();
         }
         catch ( IOException e )
@@ -511,9 +513,9 @@ private Model readModel( ModelSource modelSource, File pomFile, ModelBuildingReq
                     msg = e.getClass().getSimpleName();
                 }
             }
-            problems.add( new ModelProblemCollectorRequest(Severity.FATAL, Version.BASE)
+            problems.add( new ModelProblemCollectorRequest( Severity.FATAL, Version.BASE )
-                    .setMessage("Non-readable POM " + modelSource.getLocation() + ": " + msg)
+                    .setMessage( "Non-readable POM " + modelSource.getLocation() + ": " + msg )
-                    .setException(e ));
+                    .setException( e ) );
             throw problems.newModelBuildingException();
         }
 
@@ -522,7 +524,7 @@ private Model readModel( ModelSource modelSource, File pomFile, ModelBuildingReq
         problems.setSource( model );
         modelValidator.validateRawModel( model, request, problems );
 
-        if ( hasFatalErrors(problems) )
+        if ( hasFatalErrors( problems ) )
         {
             throw problems.newModelBuildingException();
         }
@@ -562,10 +564,10 @@ private void configureResolver( ModelResolver modelResolver, Model model, Defaul
             }
             catch ( InvalidRepositoryException e )
             {
-                problems.add( new ModelProblemCollectorRequest(Severity.ERROR, Version.BASE)
+                problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
-                        .setMessage( "Invalid repository " + repository.getId() + ": " + e.getMessage())
+                        .setMessage( "Invalid repository " + repository.getId() + ": " + e.getMessage() )
-                        .setLocation(repository.getLocation( "" ))
+                        .setLocation( repository.getLocation( "" ) )
-                        .setException(e) );
+                        .setException( e ) );
             }
         }
     }
@@ -617,9 +619,9 @@ private void checkPluginVersions( List<ModelData> lineage, ModelBuildingRequest
             if ( versions.get( key ) == null && managedVersions.get( key ) == null )
             {
                 InputLocation location = plugins.get( key ).getLocation( "" );
-                problems.add( new ModelProblemCollectorRequest(Severity.WARNING, Version.V20)
+                problems.add( new ModelProblemCollectorRequest( Severity.WARNING, Version.V20 )
-                        .setMessage( "'build.plugins.plugin.version' for " + key + " is missing.")
+                        .setMessage( "'build.plugins.plugin.version' for " + key + " is missing." )
-                        .setLocation(location));
+                        .setLocation( location ) );
             }
         }
     }
@@ -694,10 +696,10 @@ private ModelData readParent( Model childModel, ModelBuildingRequest request,
 
             if ( !"pom".equals( parentModel.getPackaging() ) )
             {
-                problems.add( new ModelProblemCollectorRequest(Severity.ERROR, Version.BASE)
+                problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
-                        .setMessage( "Invalid packaging for parent POM " + ModelProblemUtils.toSourceHint( parentModel ) + ", must be \"pom\" but is \""
+                        .setMessage( "Invalid packaging for parent POM " + ModelProblemUtils.toSourceHint( parentModel )
-                                    + parentModel.getPackaging() + "\"")
+                                     + ", must be \"pom\" but is \"" + parentModel.getPackaging() + "\"" )
-                        .setLocation(parentModel.getLocation( "packaging" )));
+                        .setLocation( parentModel.getLocation( "packaging" ) ) );
             }
         }
         else
@@ -749,9 +751,9 @@ private ModelData readParentLocally( Model childModel, ModelBuildingRequest requ
             buffer.append( ", please verify your project structure" );
 
             problems.setSource( childModel );
-            problems.add( new ModelProblemCollectorRequest( Severity.WARNING, Version.BASE)
+            problems.add( new ModelProblemCollectorRequest( Severity.WARNING, Version.BASE )
-                    .setMessage( buffer.toString())
+                    .setMessage( buffer.toString() )
-                    .setLocation( parent.getLocation( "" )));
+                    .setLocation( parent.getLocation( "" ) ) );
             return null;
         }
         if ( version == null || !version.equals( parent.getVersion() ) )
@@ -843,10 +845,10 @@ private ModelData readParentExternally( Model childModel, ModelBuildingRequest r
                 }
             }
 
-            problems.add( new ModelProblemCollectorRequest(Severity.FATAL, Version.BASE)
+            problems.add( new ModelProblemCollectorRequest( Severity.FATAL, Version.BASE )
-                    .setMessage( buffer.toString())
+                    .setMessage( buffer.toString() )
-                    .setLocation(parent.getLocation( "" ))
+                    .setLocation( parent.getLocation( "" ) )
-                    .setException(e));
+                    .setException( e ) );
             throw problems.newModelBuildingException();
         }
 
@@ -912,23 +914,26 @@ private void importDependencyManagement( Model model, ModelBuildingRequest reque
 
             if ( groupId == null || groupId.length() <= 0 )
             {
-                problems.add( new ModelProblemCollectorRequest(Severity.ERROR, Version.BASE)
+                problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
-                        .setMessage( "'dependencyManagement.dependencies.dependency.groupId' for " + dependency.getManagementKey() + " is missing.")
+                        .setMessage( "'dependencyManagement.dependencies.dependency.groupId' for "
-                        .setLocation( dependency.getLocation( "" )));
+                                        + dependency.getManagementKey() + " is missing." )
+                        .setLocation( dependency.getLocation( "" ) ) );
                 continue;
             }
             if ( artifactId == null || artifactId.length() <= 0 )
             {
-                problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE)
+                problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
-                        .setMessage( "'dependencyManagement.dependencies.dependency.artifactId' for " + dependency.getManagementKey() + " is missing.")
+                        .setMessage( "'dependencyManagement.dependencies.dependency.artifactId' for "
-                        .setLocation( dependency.getLocation( "" )));
+                                        + dependency.getManagementKey() + " is missing." )
+                        .setLocation( dependency.getLocation( "" ) ) );
                 continue;
             }
             if ( version == null || version.length() <= 0 )
             {
-                problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE)
+                problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
-                        .setMessage( "'dependencyManagement.dependencies.dependency.version' for " + dependency.getManagementKey() + " is missing.")
+                        .setMessage( "'dependencyManagement.dependencies.dependency.version' for "
-                        .setLocation( dependency.getLocation( "" )));
+                                        + dependency.getManagementKey() + " is missing." )
+                        .setLocation( dependency.getLocation( "" ) ) );
                 continue;
             }
 
@@ -942,7 +947,7 @@ private void importDependencyManagement( Model model, ModelBuildingRequest reque
                     message += modelId + " -> ";
                 }
                 message += imported;
-                problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE ).setMessage( message ));
+                problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE ).setMessage( message ) );
 
                 continue;
             }
@@ -976,8 +981,8 @@ private void importDependencyManagement( Model model, ModelBuildingRequest reque
 
                     problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
                             .setMessage( buffer.toString() )
-                            .setLocation( dependency.getLocation( "" ))
+                            .setLocation( dependency.getLocation( "" ) )
-                            .setException( e ));
+                            .setException( e ) );
                     continue;
                 }
 
@@ -1076,22 +1081,29 @@ private boolean containsCoordinates( String message, String groupId, String arti
             && ( version == null || message.contains( version ) );
     }
 
-    protected boolean hasModelErrors(ModelProblemCollectorExt problems) {
+    protected boolean hasModelErrors( ModelProblemCollectorExt problems )
-        if (problems instanceof DefaultModelProblemCollector) {
+    {
-            return ((DefaultModelProblemCollector)problems).hasErrors();
+        if ( problems instanceof DefaultModelProblemCollector )
-        } else {
+        {
-            //the default execution path only knows the DefaultModelProblemCollector,
+            return ( (DefaultModelProblemCollector) problems ).hasErrors();
+        }
+        else
+        {
+            // the default execution path only knows the DefaultModelProblemCollector,
             // only reason it's not in signature is because it's package private
             throw new IllegalStateException();
         }
-        
     }
 
-    protected boolean hasFatalErrors(ModelProblemCollectorExt problems) {
+    protected boolean hasFatalErrors( ModelProblemCollectorExt problems )
-        if (problems instanceof DefaultModelProblemCollector) {
+    {
-            return ((DefaultModelProblemCollector)problems).hasFatalErrors();
+        if ( problems instanceof DefaultModelProblemCollector )
-        } else {
+        {
-            //the default execution path only knows the DefaultModelProblemCollector,
+            return ( (DefaultModelProblemCollector) problems ).hasFatalErrors();
+        }
+        else
+        {
+            // the default execution path only knows the DefaultModelProblemCollector,
             // only reason it's not in signature is because it's package private
             throw new IllegalStateException();
         }

maven-model-builder/src/main/java/org/apache/maven/model/building/DefaultModelProblem.java

@@ -146,7 +146,8 @@ public Severity getSeverity()
         return severity;
     }
 
-    public Version getVersion() {
+    public Version getVersion()
+    {
         return version;
     }
     

maven-model-builder/src/main/java/org/apache/maven/model/building/DefaultModelProblemCollector.java

@@ -23,10 +23,7 @@
 import java.util.List;
 import java.util.Set;
 
-import org.apache.maven.model.InputLocation;
 import org.apache.maven.model.Model;
-import org.apache.maven.model.building.ModelProblem.Severity;
-import org.apache.maven.model.building.ModelProblem.Version;
 import org.apache.maven.model.io.ModelParseException;
 
 /**
@@ -174,7 +171,9 @@ public void add( ModelProblemCollectorRequest req )
             column = e.getColumnNumber();
         }
 
-        ModelProblem problem = new DefaultModelProblem( req.getMessage(), req.getSeverity(), req.getVersion(), source, line, column, modelId, req.getException() );
+        ModelProblem problem =
+            new DefaultModelProblem( req.getMessage(), req.getSeverity(), req.getVersion(), source, line, column,
+                                     modelId, req.getException() );
 
         add( problem );
     }

maven-model-builder/src/main/java/org/apache/maven/model/building/ModelProblem.java

@@ -41,7 +41,8 @@ enum Severity
 
     }
 
-    enum Version {
+    enum Version
+    {
         //based on ModeBuildingResult.validationLevel
         BASE,
         V20,

maven-model-builder/src/main/java/org/apache/maven/model/building/ModelProblemCollector.java

@@ -19,9 +19,6 @@
  * under the License.
  */
 
-import java.util.List;
-import org.apache.maven.model.InputLocation;
-
 /**
  * Collects problems that are encountered during model building. The primary purpose of this component is to account for
  * the fact that the problem reporter has/should not have information about the calling context and hence cannot provide

maven-model-builder/src/main/java/org/apache/maven/model/building/ModelProblemCollectorRequest.java

@@ -1,19 +1,23 @@
+package org.apache.maven.model.building;
+
 /*
- * Copyright 2012 The Apache Software Foundation.
+ * Licensed to the Apache Software Foundation (ASF) under one
- *
+ * or more contributor license agreements.  See the NOTICE file
- * Licensed under the Apache License, Version 2.0 (the "License");
+ * distributed with this work for additional information
- * you may not use this file except in compliance with the License.
+ * regarding copyright ownership.  The ASF licenses this file
- * You may obtain a copy of the License at
+ * 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
+ * Unless required by applicable law or agreed to in writing,
- * distributed under the License is distributed on an "AS IS" BASIS,
+ * software distributed under the License is distributed on an
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * See the License for the specific language governing permissions and
+ * KIND, either express or implied.  See the License for the
- * limitations under the License.
+ * specific language governing permissions and limitations
+ * under the License.
  */
-package org.apache.maven.model.building;
 
 import org.apache.maven.model.InputLocation;
 import org.apache.maven.model.building.ModelProblem.Severity;
@@ -38,17 +42,17 @@ public final class ModelProblemCollectorRequest
      * @param severity
      * @param version 
      */
-    public ModelProblemCollectorRequest(Severity severity, Version version)
+    public ModelProblemCollectorRequest( Severity severity, Version version )
     {
         this.severity = severity;
         this.version = version;
-        if (severity == null)
+        if ( severity == null )
         {
-            throw new IllegalStateException("No severity declared");
+            throw new IllegalStateException( "No severity declared" );
         }
-        if (version == null)
+        if ( version == null )
         {
-            throw new IllegalStateException("No version declared.");
+            throw new IllegalStateException( "No version declared." );
         }
     }
 
@@ -67,7 +71,7 @@ public Exception getException()
         return exception;
     }
 
-    public ModelProblemCollectorRequest setException(Exception exception)
+    public ModelProblemCollectorRequest setException( Exception exception )
     {
         this.exception = exception;
         return this;
@@ -78,7 +82,7 @@ public String getMessage()
         return message;
     }
 
-    public ModelProblemCollectorRequest setMessage(String message)
+    public ModelProblemCollectorRequest setMessage( String message )
     {
         this.message = message;
         return this;
@@ -89,7 +93,7 @@ public InputLocation getLocation()
         return location;
     }
 
-    public ModelProblemCollectorRequest setLocation(InputLocation location)
+    public ModelProblemCollectorRequest setLocation( InputLocation location )
     {
         this.location = location;
         return this;

maven-model-builder/src/main/java/org/apache/maven/model/inheritance/DefaultInheritanceAssembler.java

@@ -58,12 +58,17 @@ public void assembleModelInheritance( Model child, Model parent, ModelBuildingRe
 
     /**
      * Calculates the relative path from the base directory of the parent to the parent directory of the base directory
-     * of the child. The general idea is to adjust inherited URLs to match the project layout (in SCM). This calculation
+     * of the child. The general idea is to adjust inherited URLs to match the project layout (in SCM).
-     * is only a heuristic based on our conventions. In detail, the algo relies on the following assumptions. The parent
+     * 
-     * uses aggregation and refers to the child via the modules section. The module path to the child is considered to
+     * <p>This calculation is only a heuristic based on our conventions.
-     * point at the POM rather than its base directory if the path ends with ".xml" (ignoring case). The name of the
+     * In detail, the algo relies on the following assumptions: <ul>
-     * child's base directory matches the artifact id of the child. Note that for the sake of independence from the user
+     * <li>The parent uses aggregation and refers to the child via the modules section</li>
-     * environment, the filesystem is intentionally not used for the calculation.
+     * <li>The module path to the child is considered to
+     * point at the POM rather than its base directory if the path ends with ".xml" (ignoring case)</li>
+     * <li>The name of the child's base directory matches the artifact id of the child.</li>
+     * </ul>
+     * Note that for the sake of independence from the user
+     * environment, the filesystem is intentionally not used for the calculation.</p>
      *
      * @param child The child model, must not be <code>null</code>.
      * @param parent The parent model, may be <code>null</code>.
@@ -119,7 +124,7 @@ private String getChildPathAdjustment( Model child, Model parent )
         return adjustment;
     }
 
-    private static class InheritanceModelMerger
+    protected static class InheritanceModelMerger
         extends MavenModelMerger
     {
 

maven-model-builder/src/main/java/org/apache/maven/model/interpolation/AbstractStringBasedModelInterpolator.java

@@ -45,7 +45,6 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Properties;
-import org.apache.maven.model.building.ModelProblem;
 import org.apache.maven.model.building.ModelProblem.Version;
 import org.apache.maven.model.building.ModelProblemCollectorRequest;
 
@@ -244,7 +243,8 @@ protected String interpolateInternal( String src, List<? extends ValueSource> va
                 }
                 catch ( InterpolationException e )
                 {
-                    problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE ).setMessage( e.getMessage() ).setException( e ));
+                    problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
+                        .setMessage( e.getMessage() ).setException( e ) );
                 }
 
                 interpolator.clearFeedback();

maven-model-builder/src/main/java/org/apache/maven/model/interpolation/ProblemDetectingValueSource.java

@@ -20,7 +20,6 @@
  */
 
 import java.util.List;
-import org.apache.maven.model.building.ModelProblem;
 
 import org.apache.maven.model.building.ModelProblemCollector;
 import org.apache.maven.model.building.ModelProblem.Severity;
@@ -65,7 +64,7 @@ public Object getValue( String expression )
             {
                 msg += " Please use ${" + newPrefix + expression.substring( bannedPrefix.length() ) + "} instead.";
             }
-            problems.add( new ModelProblemCollectorRequest( Severity.WARNING, Version.V20 ).setMessage( msg ));
+            problems.add( new ModelProblemCollectorRequest( Severity.WARNING, Version.V20 ).setMessage( msg ) );
         }
 
         return value;

maven-model-builder/src/main/java/org/apache/maven/model/interpolation/StringSearchModelInterpolator.java

@@ -49,7 +49,7 @@ public class StringSearchModelInterpolator
     extends AbstractStringBasedModelInterpolator
 {
 
-    private static final Map<Class<?>, InterpolateObjectAction.CacheItem> cachedEntries =
+    private static final Map<Class<?>, InterpolateObjectAction.CacheItem> CACHED_ENTRIES =
         new ConcurrentHashMap<Class<?>, InterpolateObjectAction.CacheItem>( 80, 0.75f, 2 );
     // Empirical data from 3.x, actual =40
 
@@ -161,11 +161,11 @@ else if ( cacheEntry.isQualifiedForInterpolation )
 
         private CacheItem getCacheEntry( Class<?> cls )
         {
-            CacheItem cacheItem = cachedEntries.get( cls );
+            CacheItem cacheItem = CACHED_ENTRIES.get( cls );
             if ( cacheItem == null )
             {
                 cacheItem = new CacheItem( cls );
-                cachedEntries.put( cls, cacheItem );
+                CACHED_ENTRIES.put( cls, cacheItem );
             }
             return cacheItem;
         }
@@ -247,7 +247,7 @@ else if ( List.class.isAssignableFrom( type ) )
                         }
                         else if ( Collection.class.isAssignableFrom( type ) )
                         {
-                            throw new RuntimeException("We dont interpolate into collections, use a list instead");
+                            throw new RuntimeException( "We dont interpolate into collections, use a list instead" );
                         }
                         else if ( Map.class.isAssignableFrom( type ) )
                         {
@@ -278,7 +278,7 @@ public boolean isArray()
             }
         }
 
-        static abstract class CacheField
+        abstract static class CacheField
         {
             protected final Field field;
 

maven-model-builder/src/main/java/org/apache/maven/model/management/DefaultDependencyManagementInjector.java

@@ -50,7 +50,7 @@ public void injectManagement( Model model, ModelBuildingRequest request, ModelPr
         merger.mergeManagedDependencies( model );
     }
 
-    private static class ManagementModelMerger
+    protected static class ManagementModelMerger
         extends MavenModelMerger
     {
 

maven-model-builder/src/main/java/org/apache/maven/model/management/DefaultPluginManagementInjector.java

@@ -53,7 +53,7 @@ public void injectManagement( Model model, ModelBuildingRequest request, ModelPr
         merger.mergeManagedBuildPlugins( model );
     }
 
-    private static class ManagementModelMerger
+    protected static class ManagementModelMerger
         extends MavenModelMerger
     {
 

maven-model-builder/src/main/java/org/apache/maven/model/merge/MavenModelMerger.java

@@ -52,7 +52,8 @@
 import org.apache.maven.model.Site;
 
 /**
- * The domain-specific model merger for the Maven POM.
+ * The domain-specific model merger for the Maven POM, overriding generic code from parent class when necessary with
+ * more adapted algorithms.
  *
  * @author Benjamin Bentmann
  */
@@ -631,45 +632,45 @@ protected Object getDependencyKey( Dependency dependency )
     }
 
     @Override
-    protected Object getPluginKey( Plugin object )
+    protected Object getPluginKey( Plugin plugin )
     {
-        return object.getKey();
+        return plugin.getKey();
     }
 
     @Override
-    protected Object getPluginExecutionKey( PluginExecution object )
+    protected Object getPluginExecutionKey( PluginExecution pluginExecution )
     {
-        return object.getId();
+        return pluginExecution.getId();
     }
 
     @Override
-    protected Object getReportPluginKey( ReportPlugin object )
+    protected Object getReportPluginKey( ReportPlugin reportPlugin )
     {
-        return object.getKey();
+        return reportPlugin.getKey();
     }
 
     @Override
-    protected Object getReportSetKey( ReportSet object )
+    protected Object getReportSetKey( ReportSet reportSet )
     {
-        return object.getId();
+        return reportSet.getId();
     }
 
     @Override
-    protected Object getRepositoryBaseKey( RepositoryBase object )
+    protected Object getRepositoryBaseKey( RepositoryBase repositoryBase )
     {
-        return object.getId();
+        return repositoryBase.getId();
     }
 
     @Override
-    protected Object getExtensionKey( Extension object )
+    protected Object getExtensionKey( Extension extension )
     {
-        return object.getGroupId() + ':' + object.getArtifactId();
+        return extension.getGroupId() + ':' + extension.getArtifactId();
     }
 
     @Override
-    protected Object getExclusionKey( Exclusion object )
+    protected Object getExclusionKey( Exclusion exclusion )
     {
-        return object.getGroupId() + ':' + object.getArtifactId();
+        return exclusion.getGroupId() + ':' + exclusion.getArtifactId();
     }
 
     private String appendPath( String parentPath, Map<Object, Object> context )

maven-model-builder/src/main/java/org/apache/maven/model/normalization/DefaultModelNormalizer.java

@@ -93,7 +93,7 @@ public void mergeDuplicates( Model model, ModelBuildingRequest request, ModelPro
         }
     }
 
-    private static class DuplicateMerger
+    protected static class DuplicateMerger
         extends MavenModelMerger
     {
 

maven-model-builder/src/main/java/org/apache/maven/model/plugin/DefaultReportingConverter.java

@@ -108,9 +108,9 @@ public void convertReporting( Model model, ModelBuildingRequest request, ModelPr
             && request.getValidationLevel() >= ModelBuildingRequest.VALIDATION_LEVEL_MAVEN_3_1 )
         {
 
-            problems.add( new ModelProblemCollectorRequest( Severity.WARNING, Version.V31)
+            problems.add( new ModelProblemCollectorRequest( Severity.WARNING, Version.V31 )
-                    .setMessage( "The <reporting> section is deprecated, please move the reports to the <configuration> section of the new Maven Site Plugin.")
+                    .setMessage( "The <reporting> section is deprecated, please move the reports to the <configuration> section of the new Maven Site Plugin." )
-                    .setLocation( reporting.getLocation( "" ) ));
+                    .setLocation( reporting.getLocation( "" ) ) );
         }
 
         for ( ReportPlugin plugin : reporting.getPlugins() )

maven-model-builder/src/main/java/org/apache/maven/model/profile/DefaultProfileActivationContext.java

@@ -21,6 +21,8 @@
 
 import java.io.File;
 import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
@@ -42,6 +44,8 @@ public class DefaultProfileActivationContext
 
     private Map<String, String> userProperties = Collections.emptyMap();
 
+    private Map<String, String> projectProperties = Collections.emptyMap();
+
     private File projectDirectory;
 
     public List<String> getActiveProfileIds()
@@ -106,7 +110,7 @@ public Map<String, String> getSystemProperties()
      * @param systemProperties The system properties, may be {@code null}.
      * @return This context, never {@code null}.
      */
-    @SuppressWarnings( "unchecked" )
+    @SuppressWarnings("unchecked")
     public DefaultProfileActivationContext setSystemProperties( Properties systemProperties )
     {
         if ( systemProperties != null )
@@ -155,7 +159,7 @@ public Map<String, String> getUserProperties()
      * @param userProperties The user properties, may be {@code null}.
      * @return This context, never {@code null}.
      */
-    @SuppressWarnings( "unchecked" )
+    @SuppressWarnings("unchecked")
     public DefaultProfileActivationContext setUserProperties( Properties userProperties )
     {
         if ( userProperties != null )
@@ -211,4 +215,39 @@ public DefaultProfileActivationContext setProjectDirectory( File projectDirector
         return this;
     }
 
+    public Map<String, String> getProjectProperties()
+    {
+        return projectProperties;
+    }
+
+    public DefaultProfileActivationContext setProjectProperties( Properties projectProperties )
+    {
+        if ( projectProperties != null )
+        {
+
+            this.projectProperties = Collections.unmodifiableMap( toMap( projectProperties ) );
+        }
+        else
+        {
+            this.projectProperties = Collections.emptyMap();
+        }
+
+        return this;
+    }
+
+    private Map<String, String> toMap( Properties properties )
+    {
+        if ( properties == null )
+        {
+            return Collections.emptyMap();
+        }
+        Map<String, String> map = new HashMap<String, String>();
+        Enumeration keys = properties.keys();
+        while ( keys.hasMoreElements() )
+        {
+            String key = (String) keys.nextElement();
+            map.put( key, properties.getProperty( key ) );
+        }
+        return map;
+    }
 }

maven-model-builder/src/main/java/org/apache/maven/model/profile/DefaultProfileInjector.java

@@ -71,7 +71,7 @@ public void injectProfile( Model model, Profile profile, ModelBuildingRequest re
         }
     }
 
-    private static class ProfileModelMerger
+    protected static class ProfileModelMerger
         extends MavenModelMerger
     {
 

maven-model-builder/src/main/java/org/apache/maven/model/profile/DefaultProfileSelector.java

@@ -115,10 +115,10 @@ private boolean isActive( Profile profile, ProfileActivationContext context, Mod
             }
             catch ( RuntimeException e )
             {
-                problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE)
+                problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
-                        .setMessage( "Failed to determine activation for profile " + profile.getId())
+                        .setMessage( "Failed to determine activation for profile " + profile.getId() )
-                        .setLocation( profile.getLocation( "" ))
+                        .setLocation( profile.getLocation( "" ) )
-                        .setException( e ));
+                        .setException( e ) );
                 return false;
             }
         }

maven-model-builder/src/main/java/org/apache/maven/model/profile/ProfileActivationContext.java

@@ -69,4 +69,11 @@ public interface ProfileActivationContext
      */
     File getProjectDirectory();
 
+    /**
+     * Gets current calculated project properties
+     *
+     * @return The project properties, never {@code null}.
+     */
+    Map<String, String> getProjectProperties();
+
 }

maven-model-builder/src/main/java/org/apache/maven/model/profile/activation/FileProfileActivator.java

@@ -118,6 +118,8 @@ else if ( path.indexOf( "${basedir}" ) >= 0 )
             return false;
         }
 
+        interpolator.addValueSource( new MapBasedValueSource( context.getProjectProperties() ) );
+
         interpolator.addValueSource( new MapBasedValueSource( context.getUserProperties() ) );
 
         interpolator.addValueSource( new MapBasedValueSource( context.getSystemProperties() ) );

maven-model-builder/src/main/java/org/apache/maven/model/profile/activation/JdkVersionProfileActivator.java

@@ -65,7 +65,7 @@ public boolean isActive( Profile profile, ProfileActivationContext context, Mode
         {
             problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
                     .setMessage( "Failed to determine Java version for profile " + profile.getId() )
-                    .setLocation(activation.getLocation( "jdk" ) ) );
+                    .setLocation( activation.getLocation( "jdk" ) ) );
             return false;
         }
 

maven-model-builder/src/main/java/org/apache/maven/model/validation/DefaultModelValidator.java

@@ -62,7 +62,7 @@ public class DefaultModelValidator
     implements ModelValidator
 {
 
-    private static final Pattern ID_REGEX = Pattern.compile("[A-Za-z0-9_\\-.]+");
+    private static final Pattern ID_REGEX = Pattern.compile( "[A-Za-z0-9_\\-.]+" );
 
     private static final String ILLEGAL_FS_CHARS = "\\/:\"<>|?*";
 
@@ -230,8 +230,9 @@ public void validateEffectiveModel( Model model, ModelBuildingRequest request, M
         {
             if ( !"pom".equals( model.getPackaging() ) )
             {
-                addViolation( problems, Severity.ERROR, Version.BASE,"packaging", null, "with value '" + model.getPackaging()
+                addViolation( problems, Severity.ERROR, Version.BASE, "packaging", null,
-                    + "' is invalid. Aggregator projects " + "require 'pom' as packaging.", model );
+                              "with value '" + model.getPackaging() + "' is invalid. Aggregator projects "
+                                  + "require 'pom' as packaging.", model );
             }
 
             for ( int i = 0, n = model.getModules().size(); i < n; i++ )
@@ -850,7 +851,8 @@ private static void addViolation( ModelProblemCollector problems, Severity sever
 
         buffer.append( ' ' ).append( message );
 
-        problems.add( new ModelProblemCollectorRequest( severity, version ).setMessage( buffer.toString() ).setLocation( getLocation( fieldName, tracker )));
+        problems.add( new ModelProblemCollectorRequest( severity, version )
+            .setMessage( buffer.toString() ).setLocation( getLocation( fieldName, tracker ) ) );
     }
 
     private static InputLocation getLocation( String fieldName, InputLocationTracker tracker )