Best way to check if a directory is an brz branch

[Nicholas Allen]

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Hi Vincent,

Yes I realize this should work but I think it should be a method in
BzrLib and not something I, or anyone else, should have to code. I'm
sure this method could be coded more efficiently too (eg no need to try
to instantiate and catch exceptions but just check if a certain file
exists).

Nick

> 
> def is_branch(p):
>     from  bzrlib import (branch, errors)
>     try:
>         br, relpath = branch.Branch.open_containing(p)
>     except errors.NotBranchError:
>         return False
>     if relpath != '':
>         return False
>     else:
>         return True
> 
> should work.
> 
> Hth,
> 
>         Vincent
> 

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