package org.apache.maven.scm.provider.git.gitexe.command.tag;
   
   /*
    * 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.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmFileStatus;
  import org.apache.maven.scm.ScmResult;
  import org.apache.maven.scm.ScmTagParameters;
  import org.apache.maven.scm.command.checkout.CheckOutScmResult;
  import org.apache.maven.scm.command.tag.AbstractTagCommand;
  import org.apache.maven.scm.command.tag.TagScmResult;
  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.gitexe.command.list.GitListCommand;
  import org.apache.maven.scm.provider.git.gitexe.command.list.GitListConsumer;
  import org.apache.maven.scm.provider.git.repository.GitScmProviderRepository;
  import org.codehaus.plexus.util.FileUtils;
  import org.codehaus.plexus.util.StringUtils;
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  
  /**
   * @author <a href="mailto:struberg@yahoo.de">Mark Struberg</a>
   *
   */
  public class GitTagCommand
      extends AbstractTagCommand
      implements GitCommand
  {
      
      public ScmResult executeTagCommand( ScmProviderRepository repo, ScmFileSet fileSet, String tag, String message )
          throws ScmException
      {
          return executeTagCommand( repo, fileSet, tag, new ScmTagParameters( message ) );
      }
      
      /** {@inheritDoc} */
      public ScmResult executeTagCommand( ScmProviderRepository repo, ScmFileSet fileSet, String tag, ScmTagParameters scmTagParameters )
          throws ScmException
      {
          if ( tag == null || StringUtils.isEmpty( tag.trim() ) )
          {
              throw new ScmException( "tag name must be specified" );
          }
  
          if ( !fileSet.getFileList().isEmpty() )
          {
              throw new ScmException( "This provider doesn't support tagging subsets of a directory" );
          }
  
          GitScmProviderRepository repository = (GitScmProviderRepository) repo;
  
          File messageFile = FileUtils.createTempFile( "maven-scm-", ".commit", null );
  
          try
          {
              FileUtils.fileWrite( messageFile.getAbsolutePath(), scmTagParameters.getMessage() );
          }
          catch ( IOException ex )
          {
              return new TagScmResult( null, "Error while making a temporary file for the commit message: "
                  + ex.getMessage(), null, false );
          }
  
          try
          {
              CommandLineUtils.StringStreamConsumer stdout = new CommandLineUtils.StringStreamConsumer();
              CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();
  
              int exitCode;
  
              Commandline clTag = createCommandLine( repository, fileSet.getBasedir(), tag, messageFile );
  
              exitCode = GitCommandLineUtils.execute( clTag, stdout, stderr, getLogger() );
              if ( exitCode != 0 )
              {
                  return new TagScmResult( clTag.toString(), "The git-tag command failed.", stderr.getOutput(), false );
             }
 
             if( repo.isPushChanges() ) 
             {
                 // and now push the tag to the configured upstream repository
                 Commandline clPush = createPushCommandLine( repository, fileSet, tag );
     
                 exitCode = GitCommandLineUtils.execute( clPush, stdout, stderr, getLogger() );
                 if ( exitCode != 0 )
                 {
                     return new TagScmResult( clPush.toString(), "The git-push command failed.", stderr.getOutput(), false );
                 }
             }
             
             // plus search for the tagged files
             GitListConsumer listConsumer = new GitListConsumer( getLogger(), fileSet.getBasedir(), ScmFileStatus.TAGGED );
 
             Commandline clList = GitListCommand.createCommandLine( repository, fileSet.getBasedir() );
 
             exitCode = GitCommandLineUtils.execute( clList, listConsumer, stderr, getLogger() );
             if ( exitCode != 0 )
             {
                 return new CheckOutScmResult( clList.toString(), "The git-ls-files command failed.",
                                               stderr.getOutput(), false );
             }
 
             return new TagScmResult( clTag.toString(), listConsumer.getListedFiles() );
         }
         finally
         {
             try
             {
                 FileUtils.forceDelete( messageFile );
             }
             catch ( IOException ex )
             {
                 // ignore
             }
         }
 
     }
 
     // ----------------------------------------------------------------------
     //
     // ----------------------------------------------------------------------
 
     public static Commandline createCommandLine( GitScmProviderRepository repository, File workingDirectory,
                                                  String tag, File messageFile )
     {
         Commandline cl = GitCommandLineUtils.getBaseGitCommandLine( workingDirectory, "tag" );
 
         cl.createArg().setValue( "-F" );
         cl.createArg().setValue( messageFile.getAbsolutePath() );
 
         // Note: this currently assumes you have the tag base checked out too
         cl.createArg().setValue( tag );
 
         return cl;
     }
 
     public static Commandline createPushCommandLine( GitScmProviderRepository repository, ScmFileSet fileSet, String tag )
         throws ScmException
     {
         Commandline cl = GitCommandLineUtils.getBaseGitCommandLine( fileSet.getBasedir(), "push" );
 
         cl.createArg().setValue( repository.getPushUrl() );
         cl.createArg().setValue( "refs/tags/" + tag );
 
         return cl;
     }
 
 }