Re: exclusion in file patterns

On Sat, 13 Sep 2003, Bram Moolenaar wrote:

> Tim Hemel wrote:
> 
> > It would definitely solve my recursive file selection, except for the
> > exclusion, but for that you could use another operator ('-' ?).
> > 
> > FILES= `tree("www") - tree("CVS") - tree("*.bak")`
> 
> It's not difficult to add an argument to "tree" to define an exclude
> pattern.  Also avoids having to walk the tree three times.

Sounds usefull to me. How would you specify this?
 
> > But then we have another problem, what is meant by *.bak? Just the
> > .bak files in the current directory, or everything that end in .bak ?
> 
> Both are needed.

Agreed.
 
> > I would suggest calling tree something like rglob (recursive glob), if its
> > arguments are going to include wildcards.
> 
> rglob() sounds like something that accepts "**" for a pattern:
> rglob("**/*.bak").  It's OK for how you use it above, but when adding an
> "exclude" argument I suppose it's better not to use "glob" in the name.
> It's quite an obscure name anyway.

OK.
 
> > Too bad that the - operator is not defined for lists in Python, but we can
> > probably overload it.
> 
> There is probably a good reason why it wasn't defined in Python.
> 
> It's quite easy to do all this with one tree() function that takes
> multiple arguments.

This is something I would use.
 
> > The rglob/tree function definitely is useful, I think.
> 
> I suppose so.  Something similar was recently mentioned on the SCons
> maillist.
> 
> - Bram
 
Have a nice weekend,
 
Aschwin Marsman
 
--
[email protected]              http://www.marsman.org



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