Stuart Hungerford wrote:
> I'm using Rake to build various versions of some image files and
> would like to setup a Rake rule like this:
>
> rule ".50.png" => [".tiff"] do |r|
> # do stuff with r
> end
>
> The rest of the Rakefile sets up a bunch of file tasks where a
> ".50.png" depends on a ".tiff" file. However Rake doesn't seem
> to recognize those rules for me and I'm not sure why, so I tried
> a more general regex based rule:
>
>
> rule(/\.50\.png$/ => [".tiff"]) do |r|
> # do stuff with r
> end
The problem is that (by default), rake doesn't recognize ".50.png" as a
file extension. The second rule using a regexp addresses part of the
problem, but it doesn't go far enough. You also have to tell rake how
to find the source file a match for the rule. Given that it's trying to
build 'xxx.50.png', it will try to find a 'xxx.50.tiff'. If you want to
drop the 50 part, you have to give rake a proc that convert from the
.50.png to just .tiff. Something like this:
rule(/\.50\.png$/ => proc { |fn| fn.sub(/\.\d+\.png$/, '.tiff') }) do |r|
cp r.source, r.name
end
I hope I understood your problem correctly. Does that help?
--
-- Jim Weirich [EMAIL PROTECTED] http://onestepback.org
-- In theory, practice and theory are the same.
-- In practice, they are different.
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