package org.apache.maven.scm.provider.git.gitexe.command.status;
   
   /*
    * 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.net.URI;
  
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.command.AbstractCommand;
  import org.apache.maven.scm.command.status.AbstractStatusCommand;
  import org.apache.maven.scm.command.status.StatusScmResult;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.git.command.GitCommand;
  import org.apache.maven.scm.provider.git.gitexe.command.GitCommandLineUtils;
  import org.apache.maven.scm.provider.git.repository.GitScmProviderRepository;
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  
  /**
   * @author <a href="mailto:brett@apache.org">Brett Porter</a>
   *
   */
  public class GitStatusCommand
      extends AbstractStatusCommand
      implements GitCommand
  {
      /** {@inheritDoc} */
      protected StatusScmResult executeStatusCommand( ScmProviderRepository repo, ScmFileSet fileSet )
          throws ScmException
      {
          int exitCode;
          CommandLineUtils.StringStreamConsumer stderr;
  
          URI relativeRepositoryPath = getRelativeCWD( this, fileSet );
  
          Commandline cl = createCommandLine( (GitScmProviderRepository) repo, fileSet );
  
          GitStatusConsumer consumer = new GitStatusConsumer( getLogger(), fileSet.getBasedir(), relativeRepositoryPath );
  
          stderr = new CommandLineUtils.StringStreamConsumer();
  
          exitCode = GitCommandLineUtils.execute( cl, consumer, stderr, getLogger() );
          if ( exitCode != 0 )
          {
              // git-status returns non-zero if nothing to do
              if ( getLogger().isInfoEnabled() )
              {
                  getLogger().info( "nothing added to commit but untracked files present (use \"git add\" to track)" );
              }
          }
  
          return new StatusScmResult( cl.toString(), consumer.getChangedFiles() );
      }
  
      // ----------------------------------------------------------------------
      //
      // ----------------------------------------------------------------------
  
      /**
       * Get the dir relative to the repository root.
       * 
       * @param caller the caller command.
       * @param fileSet in which subdir to execute.
       * @return the relative URI.
       * @throws ScmException if execute() fails.
       */
      public static URI getRelativeCWD( AbstractCommand caller, ScmFileSet fileSet )
          throws ScmException
      {
          Commandline clRevparse = createRevparseShowPrefix( fileSet );
  
          CommandLineUtils.StringStreamConsumer stdout = new CommandLineUtils.StringStreamConsumer();
          CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();
  
          URI relativeRepositoryPath = null;
  
          int exitCode = GitCommandLineUtils.execute( clRevparse, stdout, stderr, caller.getLogger() );
          if ( exitCode != 0 )
          {
              // git-status returns non-zero if nothing to do
              if ( caller.getLogger().isInfoEnabled() )
              {
                 caller.getLogger().info( "Could not resolve prefix" );
             }
         }
         else
         {
             relativeRepositoryPath = GitStatusConsumer.uriFromPath( stdout.getOutput().trim() );
         }
         return relativeRepositoryPath;
     }
 
     public static Commandline createCommandLine( GitScmProviderRepository repository, ScmFileSet fileSet )
     {
         Commandline cl = GitCommandLineUtils.getBaseGitCommandLine( fileSet.getBasedir(), "status" );
         cl.addArguments( new String[] { "--porcelain", "." } );
         return cl;
     }
     
     public static Commandline createRevparseShowPrefix( ScmFileSet fileSet )
     {
         Commandline cl = GitCommandLineUtils.getBaseGitCommandLine( fileSet.getBasedir(), "rev-parse" );
         cl.addArguments( new String[] { "--show-prefix" } );
         return cl;
     }
 }