package org.apache.maven.plugin.registry;

 /*

  * 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.plugin.registry.io.xpp3.PluginRegistryXpp3Reader;

 import org.codehaus.plexus.logging.AbstractLogEnabled;

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

 import org.codehaus.plexus.util.IOUtil;

 import org.codehaus.plexus.util.ReaderFactory;

 import org.codehaus.plexus.util.StringUtils;

 import org.codehaus.plexus.util.xml.pull.XmlPullParserException;

 import java.io.File;

 import java.io.IOException;

 import java.io.Reader;

 public class DefaultPluginRegistryBuilder

     extends AbstractLogEnabled

     implements MavenPluginRegistryBuilder, Initializable

 {

     public static final String userHome = System.getProperty( "user.home" );

     /**

      * @configuration

      */

     private String userRegistryPath;

     /**

      * @configuration

      */

     private String globalRegistryPath;

     private File userRegistryFile;

     private File globalRegistryFile;

     // ----------------------------------------------------------------------

     // Component Lifecycle

     // ----------------------------------------------------------------------

     public void initialize()

     {

         userRegistryFile = getFile( userRegistryPath, "user.home", MavenPluginRegistryBuilder.ALT_USER_PLUGIN_REG_LOCATION );

         getLogger().debug( "Building Maven user-level plugin registry from: '" + userRegistryFile.getAbsolutePath() + "'" );

         if ( System.getProperty( "maven.home" ) != null ||

              System.getProperty( MavenPluginRegistryBuilder.ALT_GLOBAL_PLUGIN_REG_LOCATION ) != null )

         {

             globalRegistryFile = getFile( globalRegistryPath, "maven.home", MavenPluginRegistryBuilder.ALT_GLOBAL_PLUGIN_REG_LOCATION );

             getLogger().debug( "Building Maven global-level plugin registry from: '" + globalRegistryFile.getAbsolutePath() + "'" );

         }

     }

     public PluginRegistry buildPluginRegistry()

         throws IOException, XmlPullParserException

     {

         PluginRegistry global = readPluginRegistry( globalRegistryFile );

         PluginRegistry user = readPluginRegistry( userRegistryFile );

         if ( user == null && global != null )

         {

             // we'll use the globals, but first we have to recursively mark them as global...

             PluginRegistryUtils.recursivelySetSourceLevel( global, PluginRegistry.GLOBAL_LEVEL );

             user = global;

         }

         else

         {

             // merge non-colliding plugins into the user registry.

             PluginRegistryUtils.merge( user, global, TrackableBase.GLOBAL_LEVEL );

         }

         return user;

     }

     private PluginRegistry readPluginRegistry( File registryFile )

         throws IOException, XmlPullParserException

     {

         PluginRegistry registry = null;

         if ( registryFile != null && registryFile.exists() && registryFile.isFile() )

         {

             Reader reader = null;

             try

             {

                 reader = ReaderFactory.newXmlReader( registryFile );

                 PluginRegistryXpp3Reader modelReader = new PluginRegistryXpp3Reader();

                 registry = modelReader.read( reader );

                 RuntimeInfo rtInfo = new RuntimeInfo( registry );

                 registry.setRuntimeInfo( rtInfo );

                 rtInfo.setFile( registryFile );

             }

             finally

             {

                 IOUtil.close( reader );

             }

         }

         return registry;

     }

     private File getFile( String pathPattern, String basedirSysProp, String altLocationSysProp )

     {

         // -------------------------------------------------------------------------------------

         // Alright, here's the justification for all the regexp wizardry below...

         //

         // Continuum and other server-like apps may need to locate the user-level and 

         // global-level settings somewhere other than ${user.home} and ${maven.home},

         // respectively. Using a simple replacement of these patterns will allow them

         // to specify the absolute path to these files in a customized components.xml

         // file. Ideally, we'd do full pattern-evaluation against the sysprops, but this

         // is a first step. There are several replacements below, in order to normalize

         // the path character before we operate on the string as a regex input, and 

         // in order to avoid surprises with the File construction...

         // -------------------------------------------------------------------------------------

         String path = System.getProperty( altLocationSysProp );

         if ( StringUtils.isEmpty( path ) )

         {

             // TODO: This replacing shouldn't be necessary as user.home should be in the

             // context of the container and thus the value would be interpolated by Plexus

             String basedir = System.getProperty( basedirSysProp );

             basedir = basedir.replaceAll( "\\\\", "/" );

             basedir = basedir.replaceAll("\\$", "\\\\\\$");

             path = pathPattern.replaceAll( "\\$\\{" + basedirSysProp + "\\}", basedir );

             path = path.replaceAll( "\\\\", "/" );

             path = path.replaceAll( "//", "/" );

             return new File( path ).getAbsoluteFile();

         }

         else

         {

             return new File( path ).getAbsoluteFile();

         }

     }

     public PluginRegistry createUserPluginRegistry()

     {

         PluginRegistry registry = new PluginRegistry();

         RuntimeInfo rtInfo = new RuntimeInfo( registry );

         registry.setRuntimeInfo( rtInfo );

         rtInfo.setFile( userRegistryFile );

         return registry;

     }

 }