package org.apache.maven.scm.provider.git.gitexe.command.checkin;
   
   /*
    * 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.commons.io.FilenameUtils;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFile;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmFileStatus;
  import org.apache.maven.scm.ScmVersion;
  import org.apache.maven.scm.command.checkin.AbstractCheckInCommand;
  import org.apache.maven.scm.command.checkin.CheckInScmResult;
  import org.apache.maven.scm.log.ScmLogger;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.git.command.GitCommand;
  import org.apache.maven.scm.provider.git.repository.GitScmProviderRepository;
  import org.apache.maven.scm.provider.git.util.GitUtil;
  import org.apache.maven.scm.provider.git.gitexe.command.GitCommandLineUtils;
  import org.apache.maven.scm.provider.git.gitexe.command.add.GitAddCommand;
  import org.apache.maven.scm.provider.git.gitexe.command.branch.GitBranchCommand;
  import org.apache.maven.scm.provider.git.gitexe.command.status.GitStatusCommand;
  import org.apache.maven.scm.provider.git.gitexe.command.status.GitStatusConsumer;
  import org.codehaus.plexus.util.FileUtils;
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * @author <a href="mailto:struberg@yahoo.de">Mark Struberg</a>
   * @author Olivier Lamy
   *
   */
  public class GitCheckInCommand
      extends AbstractCheckInCommand
      implements GitCommand
  {
      /** {@inheritDoc} */
      protected CheckInScmResult executeCheckInCommand( ScmProviderRepository repo, ScmFileSet fileSet, String message,
                                                        ScmVersion version )
          throws ScmException
      {
          GitScmProviderRepository repository = (GitScmProviderRepository) repo;
  
          CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();
          CommandLineUtils.StringStreamConsumer stdout = new CommandLineUtils.StringStreamConsumer();
  
          int exitCode;
  
          File messageFile = FileUtils.createTempFile( "maven-scm-", ".commit", null );
          try
          {
              FileUtils.fileWrite( messageFile.getAbsolutePath(), message );
          }
          catch ( IOException ex )
          {
              return new CheckInScmResult( null, "Error while making a temporary file for the commit message: "
                  + ex.getMessage(), null, false );
          }
  
          try
          {
              if ( !fileSet.getFileList().isEmpty() )
              {
                  // if specific fileSet is given, we have to git-add them first
                  // otherwise we will use 'git-commit -a' later
  
                  Commandline clAdd = GitAddCommand.createCommandLine( fileSet.getBasedir(), fileSet.getFileList() );
  
                  exitCode = GitCommandLineUtils.execute( clAdd, stdout, stderr, getLogger() );
  
                  if ( exitCode != 0 )
                  {
                      return new CheckInScmResult( clAdd.toString(), "The git-add command failed.", stderr.getOutput(),
                                                   false );
                  }
  
              }
  
             // git-commit doesn't show single files, but only summary :/
             // so we must run git-status and consume the output
             // borrow a few things from the git-status command
             Commandline clStatus = GitStatusCommand.createCommandLine( repository, fileSet );
 
             GitStatusConsumer statusConsumer = new GitStatusConsumer( getLogger(), fileSet.getBasedir() );
             exitCode = GitCommandLineUtils.execute( clStatus, statusConsumer, 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)" );
                 }
             }
             
             if ( statusConsumer.getChangedFiles().isEmpty() )
             {
                 return new CheckInScmResult( null, statusConsumer.getChangedFiles() );
             }
 
             Commandline clCommit = createCommitCommandLine( repository, fileSet, messageFile );
 
             exitCode = GitCommandLineUtils.execute( clCommit, stdout, stderr, getLogger() );
             if ( exitCode != 0 )
             {
                 return new CheckInScmResult( clCommit.toString(), "The git-commit command failed.", stderr.getOutput(),
                                              false );
             }
 
             if( repo.isPushChanges() ) 
             {
                 Commandline cl = createPushCommandLine( getLogger(), repository, fileSet, version );
 
                 exitCode = GitCommandLineUtils.execute( cl, stdout, stderr, getLogger() );
                 if ( exitCode != 0 )
                 {
                     return new CheckInScmResult( cl.toString(), "The git-push command failed.", stderr.getOutput(), false );
                 }                
             }
 
             List<ScmFile> checkedInFiles = new ArrayList<ScmFile>( statusConsumer.getChangedFiles().size() );
 
             // rewrite all detected files to now have status 'checked_in'
             for ( ScmFile changedFile : statusConsumer.getChangedFiles() )
             {
                 ScmFile scmfile = new ScmFile( changedFile.getPath(), ScmFileStatus.CHECKED_IN );
 
                 if ( fileSet.getFileList().isEmpty() )
                 {
                     checkedInFiles.add( scmfile );
                 }
                 else
                 {
                     // if a specific fileSet is given, we have to check if the file is really tracked
                     for ( File f : fileSet.getFileList() )
                     {
                         if ( FilenameUtils.separatorsToUnix( f.getPath() ).equals( scmfile.getPath() ) )
                         {
                             checkedInFiles.add( scmfile );
                         }
 
                     }
                 }
             }
 
             return new CheckInScmResult( clCommit.toString(), checkedInFiles );
         }
         finally
         {
             try
             {
                 FileUtils.forceDelete( messageFile );
             }
             catch ( IOException ex )
             {
                 // ignore
             }
         }
 
     }
 
     // ----------------------------------------------------------------------
     //
     // ----------------------------------------------------------------------
 
     public static Commandline createPushCommandLine( ScmLogger logger, GitScmProviderRepository repository,
                                                      ScmFileSet fileSet, ScmVersion version )
         throws ScmException
     {
         Commandline cl = GitCommandLineUtils.getBaseGitCommandLine( fileSet.getBasedir(), "push" );
 
         String branch = GitBranchCommand.getCurrentBranch( logger, repository, fileSet );
         
         if ( branch == null || branch.length() == 0 )
         {
             throw new ScmException( "Could not detect the current branch. Don't know where I should push to!" );
         }
         
         cl.createArg().setValue( repository.getPushUrl() );
         
         cl.createArg().setValue( branch + ":" + branch );
 
         return cl;
     }
 
     public static Commandline createCommitCommandLine( GitScmProviderRepository repository, ScmFileSet fileSet,
                                                        File messageFile )
         throws ScmException
     {
         Commandline cl = GitCommandLineUtils.getBaseGitCommandLine( fileSet.getBasedir(), "commit" );
 
         cl.createArg().setValue( "--verbose" );
 
         cl.createArg().setValue( "-F" );
 
         cl.createArg().setValue( messageFile.getAbsolutePath() );
 
         if ( fileSet.getFileList().isEmpty() )
         {
             // commit all tracked files
             cl.createArg().setValue( "-a" );
         }
         else
         {
             // specify exactly which files to commit
             GitCommandLineUtils.addTarget( cl, fileSet.getFileList() );
         }
 
         if ( GitUtil.getSettings().isCommitNoVerify() )
         {
             cl.createArg().setValue( "--no-verify" );
         }
 
         return cl;
     }
 
 }