ignore regex for "all but select dirs"

[Michael Gliwinski]

On Monday 01 February 2010 10:13:53 Michael Gliwinski wrote:
> Hello all,
>
> What I wanted to ask is if anyone managed to construct a regex to use in
> bzrignore file which selects all files/directories (or files matching some
> glob) except for some explicitly listed ones.
>
> I know the subject has been discussed before and John Whitley is working on
> ignore exclusions which might work for the purpose, it's just at the moment
> we have 2.0.x deployed and I need to find a stopgap solution at least.
>
> I'm asking here cause maybe someone has already done that so I could avoid
> re-inventing.
>
> A valid working regex would be something like:
>
>   '^(?!(?:dir1|dir2|dir3)\\b)'
>
> this works when matching with re.match, but when assembled into regex
> pattern by the Globster it ends up as:
>
>   '(?:(^(?!(?:dir1|dir2|dir3)\\b)))$
>
> which doesn't work.  Also tried without the '\b' when I noticed it
> automatically adds the '$' but no change.  It also doesn't work without
> the '^' (tried just in case).
>
> When I copy that regex from Globster, remove the '$' and use it with
> re.match, it works.
>
> Any ideas?

Never mind, only had the coffee now ;)  The answer is:

  '^(?!(?:dir1|dir2|dir3)\b).*'

Of course the '(?!x)' is non-consuming so when '$' is appended it effectively 
matches only an empty string.


-- 
Michael Gliwinski
Henderson Group Information Services
9-11 Hightown Avenue, Newtownabby, BT36 4RT
Phone: 028 9034 3319

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