/// <summary>
/// Updates the file in the working tree with content and mode from an entry
/// in the index.
/// </summary>
/// <remarks>
/// Updates the file in the working tree with content and mode from an entry
/// in the index. The new content is first written to a new temporary file in
/// the same directory as the real file. Then that new file is renamed to the
/// final filename.
/// TODO: this method works directly on File IO, we may need another
/// abstraction (like WorkingTreeIterator). This way we could tell e.g.
/// Eclipse that Files in the workspace got changed
/// </remarks>
/// <param name="repo"></param>
/// <param name="f">
/// the file to be modified. The parent directory for this file
/// has to exist already
/// </param>
/// <param name="entry">the entry containing new mode and content</param>
/// <exception cref="System.IO.IOException">System.IO.IOException</exception>
public static void CheckoutEntry(Repository repo, FilePath f, DirCacheEntry entry
)
{
ObjectLoader ol = repo.Open(entry.GetObjectId());
FilePath parentDir = f.GetParentFile();
FilePath tmpFile = FilePath.CreateTempFile("._" + f.GetName(), null, parentDir);
FileOutputStream channel = new FileOutputStream(tmpFile);
try
{
ol.CopyTo(channel);
}
finally
{
channel.Close();
}
FS fs = repo.FileSystem;
WorkingTreeOptions opt = repo.GetConfig().Get(WorkingTreeOptions.KEY);
if (opt.IsFileMode() && fs.SupportsExecute())
{
if (FileMode.EXECUTABLE_FILE.Equals(entry.RawMode))
{
if (!fs.CanExecute(tmpFile))
{
fs.SetExecute(tmpFile, true);
}
}
else
{
if (fs.CanExecute(tmpFile))
{
fs.SetExecute(tmpFile, false);
}
}
}
if (!tmpFile.RenameTo(f))
{
// tried to rename which failed. Let' delete the target file and try
// again
FileUtils.Delete(f);
if (!tmpFile.RenameTo(f))
{
throw new IOException(MessageFormat.Format(JGitText.Get().couldNotWriteFile, tmpFile
.GetPath(), f.GetPath()));
}
}
entry.LastModified = f.LastModified();
entry.SetLength((int)ol.GetSize());
}