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 org.apache.maven.settings.io.xpp3.SettingsXpp3Reader;

 import org.codehaus.plexus.interpolation.EnvarBasedValueSource;

 import org.codehaus.plexus.interpolation.RegexBasedInterpolator;

 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;

 import java.io.StringReader;

 import java.io.StringWriter;

 import java.util.Iterator;

 import java.util.List;

 /**

  * @author jdcasey

  * @version $Id: DefaultMavenSettingsBuilder.java 747683 2009-02-25 06:52:54Z brett $

  */

 public class DefaultMavenSettingsBuilder

     extends AbstractLogEnabled

     implements MavenSettingsBuilder, Initializable

 {

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

     /**

      * @configuration

      */

     private String userSettingsPath;

     /**

      * @configuration

      */

     private String globalSettingsPath;

     private File userSettingsFile;

     private File globalSettingsFile;

     private Settings loadedSettings;

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

     // Component Lifecycle

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

     public void initialize()

     {

         userSettingsFile =

             getFile( userSettingsPath, "user.home", MavenSettingsBuilder.ALT_USER_SETTINGS_XML_LOCATION );

         globalSettingsFile =

             getFile( globalSettingsPath, "maven.home", MavenSettingsBuilder.ALT_GLOBAL_SETTINGS_XML_LOCATION );

         getLogger().debug(

             "Building Maven global-level settings from: '" + globalSettingsFile.getAbsolutePath() + "'" );

         getLogger().debug( "Building Maven user-level settings from: '" + userSettingsFile.getAbsolutePath() + "'" );

     }

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

     // MavenProfilesBuilder Implementation

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

     private Settings readSettings( File settingsFile )

         throws IOException, XmlPullParserException

     {

         Settings settings = null;

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

         {

             Reader reader = null;

             try

             {

                 reader = ReaderFactory.newXmlReader( settingsFile );

                 StringWriter sWriter = new StringWriter();

                 IOUtil.copy( reader, sWriter );

                 String rawInput = sWriter.toString();

                 try

                 {

                     RegexBasedInterpolator interpolator = new RegexBasedInterpolator();

                     interpolator.addValueSource( new EnvarBasedValueSource() );

                     rawInput = interpolator.interpolate( rawInput, "settings" );

                 }

                 catch ( Exception e )

                 {

                     getLogger().warn(

                         "Failed to initialize environment variable resolver. Skipping environment substitution in settings." );

                     getLogger().debug( "Failed to initialize envar resolver. Skipping resolution.", e );

                 }

                 StringReader sReader = new StringReader( rawInput );

                 SettingsXpp3Reader modelReader = new SettingsXpp3Reader();

                 settings = modelReader.read( sReader, true );

                 RuntimeInfo rtInfo = new RuntimeInfo( settings );

                 rtInfo.setFile( settingsFile );

                 settings.setRuntimeInfo( rtInfo );

             }

             finally

             {

                 IOUtil.close( reader );

             }

         }

         return settings;

     }

     public Settings buildSettings()

         throws IOException, XmlPullParserException

     {

         return buildSettings( userSettingsFile );

     }

     public Settings buildSettings( boolean useCachedSettings )

         throws IOException, XmlPullParserException

     {

         return buildSettings( userSettingsFile, useCachedSettings );

     }

     public Settings buildSettings( File userSettingsFile )

         throws IOException, XmlPullParserException

     {

         return buildSettings( userSettingsFile, true );

     }

     public Settings buildSettings( File userSettingsFile, boolean useCachedSettings )

         throws IOException, XmlPullParserException

     {

         if ( !useCachedSettings || loadedSettings == null )

         {

             Settings globalSettings = readSettings( globalSettingsFile );

             Settings userSettings = readSettings( userSettingsFile );

             if ( globalSettings == null )

             {

                 globalSettings = new Settings();

             }

             if ( userSettings == null )

             {

                 userSettings = new Settings();

                 userSettings.setRuntimeInfo( new RuntimeInfo( userSettings ) );

             }

             SettingsUtils.merge( userSettings, globalSettings, TrackableBase.GLOBAL_LEVEL );

             activateDefaultProfiles( userSettings );

             setLocalRepository( userSettings );

             loadedSettings = userSettings;

         }

         return loadedSettings;

     }

     private void activateDefaultProfiles( Settings settings )

     {

         List activeProfiles = settings.getActiveProfiles();

         for ( Iterator profiles = settings.getProfiles().iterator(); profiles.hasNext(); )

         {

             Profile profile = (Profile) profiles.next();

             if ( profile.getActivation() != null && profile.getActivation().isActiveByDefault()

                 && !activeProfiles.contains( profile.getId() ) )

             {

                 settings.addActiveProfile( profile.getId() );

             }

         }

     }

     private void setLocalRepository( Settings userSettings )

     {

         // try using the local repository specified on the command line...

         String localRepository = System.getProperty( MavenSettingsBuilder.ALT_LOCAL_REPOSITORY_LOCATION );

         // otherwise, use the one in settings.xml

         if ( localRepository == null || localRepository.length() < 1 )

         {

             localRepository = userSettings.getLocalRepository();

         }

         // if all of the above are missing, default to ~/.m2/repository.

         if ( localRepository == null || localRepository.length() < 1 )

         {

             File mavenUserConfigurationDirectory = new File( userHome, ".m2" );

             if ( !mavenUserConfigurationDirectory.exists() )

             {

                 if ( !mavenUserConfigurationDirectory.mkdirs() )

                 {

                     //throw a configuration exception

                 }

             }

             localRepository = new File( mavenUserConfigurationDirectory, "repository" ).getAbsolutePath();

         }

         // for the special case of a drive-relative Windows path, make sure it's absolute to save plugins from trouble

         File file = new File( localRepository );

         if ( !file.isAbsolute() && file.getPath().startsWith( File.separator ) )

         {

             localRepository = file.getAbsolutePath();

         }

         userSettings.setLocalRepository( localRepository );

     }

     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();

         }

     }

 }