/// <summary>Try to establish an update lock on the cache file.</summary>
/// <remarks>Try to establish an update lock on the cache file.</remarks>
/// <returns>
/// true if the lock is now held by the caller; false if it is held
/// by someone else.
/// </returns>
/// <exception cref="System.IO.IOException">
/// the output file could not be created. The caller does not
/// hold the lock.
/// </exception>
public virtual bool Lock()
{
if (liveFile == null)
{
throw new IOException(JGitText.Get().dirCacheDoesNotHaveABackingFile);
}
LockFile tmp = new LockFile(liveFile, fs);
if (tmp.Lock())
{
tmp.SetNeedStatInformation(true);
myLock = tmp;
return(true);
}
return(false);
}