Running actual VCS command could be extremely slow. Fortunately, we
don't have to run hg branch command unless the .hg directory exists
either in the current directory or in any of the ancestor directories.
Thus if we check for the VCS-specific directory in advance we could avoid
running the command unless the directory exists.
Running actual VCS command could be extremely slow. Fortunately, we don't have to run
hg branchcommand unless the.hgdirectory exists either in the current directory or in any of the ancestor directories.Thus if we check for the VCS-specific directory in advance we could avoid running the command unless the directory exists.