package org.apache.maven.plugin.dependency;

 /*

  * 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.commons.lang.StringUtils;

 import org.apache.maven.artifact.Artifact;

 import org.apache.maven.plugin.AbstractMojo;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.apache.maven.plugin.MojoFailureException;

 import org.apache.maven.plugins.annotations.Component;

 import org.apache.maven.plugins.annotations.Parameter;

 import org.apache.maven.project.MavenProject;

 import org.apache.maven.shared.dependency.analyzer.ProjectDependencyAnalysis;

 import org.apache.maven.shared.dependency.analyzer.ProjectDependencyAnalyzer;

 import org.apache.maven.shared.dependency.analyzer.ProjectDependencyAnalyzerException;

 import org.codehaus.plexus.PlexusConstants;

 import org.codehaus.plexus.PlexusContainer;

 import org.codehaus.plexus.context.Context;

 import org.codehaus.plexus.context.ContextException;

 import org.codehaus.plexus.personality.plexus.lifecycle.phase.Contextualizable;

 import org.codehaus.plexus.util.xml.PrettyPrintXMLWriter;

 import java.io.File;

 import java.io.StringWriter;

 import java.util.HashSet;

 import java.util.Iterator;

 import java.util.Set;

 /**

  * Analyzes the dependencies of this project and determines which are: used and declared; used and undeclared; unused

  * and declared.

  *

  * @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a>

  * @version $Id: AbstractAnalyzeMojo.java 1357251 2012-07-04 13:28:33Z olamy $

  * @since 2.0-alpha-5

  */

 public abstract class AbstractAnalyzeMojo

     extends AbstractMojo

     implements Contextualizable

 {

     // fields -----------------------------------------------------------------

     /**

      * The plexus context to look-up the right {@link ProjectDependencyAnalyzer} implementation depending on the mojo

      * configuration.

      */

     private Context context;

     /**

      * The Maven project to analyze.

      */

     @Component

     private MavenProject project;

     /**

      * Project dependency analyzer to use (plexus component role-hint).

      *

      * @since 2.2

      */

     @Parameter( property = "analyzer", defaultValue = "default" )

     private String analyzer;

     /**

      * Whether to fail the build if a dependency warning is found.

      */

     @Parameter( property = "failOnWarning", defaultValue = "false" )

     private boolean failOnWarning;

     /**

      * Output used dependencies

      */

     @Parameter( property = "verbose", defaultValue = "false" )

     private boolean verbose;

     /**

      * Ignore Runtime,Provide,Test,System scopes for unused dependency analysis

      */

     @Parameter( property = "ignoreNonCompile", defaultValue = "false" )

     private boolean ignoreNonCompile;

     /**

      * Output the xml for the missing dependencies

      *

      * @since 2.0-alpha-5

      */

     @Parameter( property = "outputXML", defaultValue = "false" )

     private boolean outputXML;

     /**

      * Output scriptable values

      *

      * @since 2.0-alpha-5

      */

     @Parameter( property = "scriptableOutput", defaultValue = "false" )

     private boolean scriptableOutput;

     /**

      * Flag to use for scriptable output

      *

      * @since 2.0-alpha-5

      */

     @Parameter( property = "scriptableFlag", defaultValue = "$$$%%%" )

     private String scriptableFlag;

     /**

      * Flag to use for scriptable output

      *

      * @since 2.0-alpha-5

      */

     @Parameter( defaultValue = "${basedir}", readonly = true )

     private File baseDir;

     /**

      * Target folder

      *

      * @since 2.0-alpha-5

      */

     @Parameter( defaultValue = "${project.build.directory}", readonly = true )

     private File outputDirectory;

     // Mojo methods -----------------------------------------------------------

     /*

      * @see org.apache.maven.plugin.Mojo#execute()

      */

     public void execute()

         throws MojoExecutionException, MojoFailureException

     {

         if ( "pom".equals( project.getPackaging() ) )

         {

             getLog().info( "Skipping pom project" );

             return;

         }

         if ( outputDirectory == null || !outputDirectory.exists() )

         {

             getLog().info( "Skipping project with no build directory" );

             return;

         }

         boolean warning = checkDependencies();

         if ( warning && failOnWarning )

         {

             throw new MojoExecutionException( "Dependency problems found" );

         }

     }

     protected ProjectDependencyAnalyzer createProjectDependencyAnalyzer()

         throws MojoExecutionException

     {

         final String role = ProjectDependencyAnalyzer.ROLE;

         final String roleHint = analyzer;

         try

         {

             final PlexusContainer container = (PlexusContainer) context.get( PlexusConstants.PLEXUS_KEY );

             return (ProjectDependencyAnalyzer) container.lookup( role, roleHint );

         }

         catch ( Exception exception )

         {

             throw new MojoExecutionException(

                 "Failed to instantiate ProjectDependencyAnalyser with role " + role + " / role-hint " + roleHint,

                 exception );

         }

     }

     public void contextualize( Context context )

         throws ContextException

     {

         this.context = context;

     }

     // private methods --------------------------------------------------------

     private boolean checkDependencies()

         throws MojoExecutionException

     {

         ProjectDependencyAnalysis analysis;

         try

         {

             analysis = createProjectDependencyAnalyzer().analyze( project );

         }

         catch ( ProjectDependencyAnalyzerException exception )

         {

             throw new MojoExecutionException( "Cannot analyze dependencies", exception );

         }

         @SuppressWarnings( "unchecked" ) Set<Artifact> usedDeclared = analysis.getUsedDeclaredArtifacts();

         @SuppressWarnings( "unchecked" ) Set<Artifact> usedUndeclared = analysis.getUsedUndeclaredArtifacts();

         @SuppressWarnings( "unchecked" ) Set<Artifact> unusedDeclared = analysis.getUnusedDeclaredArtifacts();

         if ( ignoreNonCompile )

         {

             Set<Artifact> filteredUnusedDeclared = new HashSet<Artifact>( unusedDeclared );

             Iterator<Artifact> iter = filteredUnusedDeclared.iterator();

             while ( iter.hasNext() )

             {

                 Artifact artifact = iter.next();

                 if ( !artifact.getScope().equals( Artifact.SCOPE_COMPILE ) )

                 {

                     iter.remove();

                 }

             }

             unusedDeclared = filteredUnusedDeclared;

         }

         if ( ( !verbose || usedDeclared.isEmpty() ) && usedUndeclared.isEmpty() && unusedDeclared.isEmpty() )

         {

             getLog().info( "No dependency problems found" );

             return false;

         }

         if ( verbose && !usedDeclared.isEmpty() )

         {

             getLog().info( "Used declared dependencies found:" );

             logArtifacts( analysis.getUsedDeclaredArtifacts(), false );

         }

         if ( !usedUndeclared.isEmpty() )

         {

             getLog().warn( "Used undeclared dependencies found:" );

             logArtifacts( usedUndeclared, true );

         }

         if ( !unusedDeclared.isEmpty() )

         {

             getLog().warn( "Unused declared dependencies found:" );

             logArtifacts( unusedDeclared, true );

         }

         if ( outputXML )

         {

             writeDependencyXML( usedUndeclared );

         }

         if ( scriptableOutput )

         {

             writeScriptableOutput( usedUndeclared );

         }

         return !usedUndeclared.isEmpty() || !unusedDeclared.isEmpty();

     }

     private void logArtifacts( Set<Artifact> artifacts, boolean warn )

     {

         if ( artifacts.isEmpty() )

         {

             getLog().info( "   None" );

         }

         else

         {

             for ( Artifact artifact : artifacts )

             {

                 // called because artifact will set the version to -SNAPSHOT only if I do this. MNG-2961

                 artifact.isSnapshot();

                 if ( warn )

                 {

                     getLog().warn( "   " + artifact );

                 }

                 else

                 {

                     getLog().info( "   " + artifact );

                 }

             }

         }

     }

     private void writeDependencyXML( Set<Artifact> artifacts )

     {

         if ( !artifacts.isEmpty() )

         {

             getLog().info( "Add the following to your pom to correct the missing dependencies: " );

             StringWriter out = new StringWriter();

             PrettyPrintXMLWriter writer = new PrettyPrintXMLWriter( out );

             for ( Artifact artifact : artifacts )

             {

                 // called because artifact will set the version to -SNAPSHOT only if I do this. MNG-2961

                 artifact.isSnapshot();

                 writer.startElement( "dependency" );

                 writer.startElement( "groupId" );

                 writer.writeText( artifact.getGroupId() );

                 writer.endElement();

                 writer.startElement( "artifactId" );

                 writer.writeText( artifact.getArtifactId() );

                 writer.endElement();

                 writer.startElement( "version" );

                 writer.writeText( artifact.getBaseVersion() );

                 if ( !StringUtils.isBlank( artifact.getClassifier() ) )

                 {

                     writer.startElement( "classifier" );

                     writer.writeText( artifact.getClassifier() );

                     writer.endElement();

                 }

                 writer.endElement();

                 if ( !Artifact.SCOPE_COMPILE.equals( artifact.getScope() ) )

                 {

                     writer.startElement( "scope" );

                     writer.writeText( artifact.getScope() );

                     writer.endElement();

                 }

                 writer.endElement();

             }

             getLog().info( "\n" + out.getBuffer() );

         }

     }

     private void writeScriptableOutput( Set<Artifact> artifacts )

     {

         if ( !artifacts.isEmpty() )

         {

             getLog().info( "Missing dependencies: " );

             String pomFile = baseDir.getAbsolutePath() + File.separatorChar + "pom.xml";

             StringBuffer buf = new StringBuffer();

             for ( Artifact artifact : artifacts )

             {

                 // called because artifact will set the version to -SNAPSHOT only if I do this. MNG-2961

                 artifact.isSnapshot();

                 buf.append( scriptableFlag + ":" + pomFile + ":" + artifact.getDependencyConflictId() + ":"

                                 + artifact.getClassifier() + ":" + artifact.getBaseVersion() + ":" + artifact.getScope()

                                 + "\n" );

             }

             getLog().info( "\n" + buf );

         }

     }

 }