package org.apache.maven.settings;
   
   /*
    * 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.io.IOException;
  
  import org.apache.maven.execution.MavenExecutionRequest;
  import org.apache.maven.settings.building.DefaultSettingsBuildingRequest;
  import org.apache.maven.settings.building.SettingsBuilder;
  import org.apache.maven.settings.building.SettingsBuildingException;
  import org.apache.maven.settings.building.SettingsBuildingRequest;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.component.annotations.Requirement;
  import org.codehaus.plexus.logging.AbstractLogEnabled;
  import org.codehaus.plexus.util.StringUtils;
  import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
  
  /**
   * @author jdcasey
   */
  @Component( role = MavenSettingsBuilder.class )
  public class DefaultMavenSettingsBuilder
      extends AbstractLogEnabled
      implements MavenSettingsBuilder
  {
  
      @Requirement
      private SettingsBuilder settingsBuilder;
  
      public Settings buildSettings()
          throws IOException, XmlPullParserException
      {
          File userSettingsFile =
              getFile( "${user.home}/.m2/settings.xml", "user.home",
                       MavenSettingsBuilder.ALT_USER_SETTINGS_XML_LOCATION );
  
          return buildSettings( userSettingsFile );
      }
  
      public Settings buildSettings( boolean useCachedSettings )
          throws IOException, XmlPullParserException
      {
          return buildSettings();
      }
  
      public Settings buildSettings( File userSettingsFile )
          throws IOException, XmlPullParserException
      {
          File globalSettingsFile =
              getFile( "${maven.home}/conf/settings.xml", "maven.home",
                       MavenSettingsBuilder.ALT_GLOBAL_SETTINGS_XML_LOCATION );
  
          SettingsBuildingRequest request = new DefaultSettingsBuildingRequest();
          request.setUserSettingsFile( userSettingsFile );
          request.setGlobalSettingsFile( globalSettingsFile );
          request.setSystemProperties( System.getProperties() );
          return build( request );
      }
  
      public Settings buildSettings( File userSettingsFile, boolean useCachedSettings )
          throws IOException, XmlPullParserException
      {
          return buildSettings( userSettingsFile );
      }
  
      private Settings build( SettingsBuildingRequest request )
          throws IOException, XmlPullParserException
      {
          try
          {
              return settingsBuilder.build( request ).getEffectiveSettings();
          }
          catch ( SettingsBuildingException e )
          {
              throw (IOException) new IOException( e.getMessage() ).initCause( e );
          }
      }
  
      /** @since 2.1 */
      public Settings buildSettings( MavenExecutionRequest request )
          throws IOException, XmlPullParserException
     {
         SettingsBuildingRequest settingsRequest = new DefaultSettingsBuildingRequest();
         settingsRequest.setUserSettingsFile( request.getUserSettingsFile() );
         settingsRequest.setGlobalSettingsFile( request.getGlobalSettingsFile() );
         settingsRequest.setUserProperties( request.getUserProperties() );
         settingsRequest.setSystemProperties( request.getSystemProperties() );
 
         return build( settingsRequest );
     }
 
     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 );
             if ( basedir == null )
             {
                 basedir = System.getProperty( "user.dir" );
             }
 
             basedir = basedir.replaceAll( "\\\\", "/" );
             basedir = basedir.replaceAll( "\\$", "\\\\\\$" );
 
             path = pathPattern.replaceAll( "\\$\\{" + basedirSysProp + "\\}", basedir );
             path = path.replaceAll( "\\\\", "/" );
             // ---------------------------------------------------------------------------------
             // I'm not sure if this last regexp was really intended to disallow the usage of
             // network paths as user.home directory. Unfortunately it did. I removed it and
             // have not detected any problems yet.
             // ---------------------------------------------------------------------------------
             // path = path.replaceAll( "//", "/" );
 
             return new File( path ).getAbsoluteFile();
         }
         else
         {
             return new File( path ).getAbsoluteFile();
         }
     }
 
 }