From: Jim Weirich <jim@...>
Date: 2007-03-31T21:04:27+09:00
Subject: Re: Moving batches of files with Rake

Gavin Kistner wrote:
> I'm comparing Rake and NAnt for our pseudo-build process needs. I've
> written the NAnt build file, and now I'm trying to port it (directly
> at first) to Rake.
> 
> NAnt has a 'move' task for moving batches of files to a new directory.
> By default, if you list specific files that don't exist, they are
> ignored (not errored). Here's an example of the NAnt section I'm
> trying to recreate:
> 
>     <move todir="${path.intermediate}">
>       <fileset>
>         <include name="${dae}" />
>         <include name="${presentation_name}_org.bgf" />
>       </fileset>
>     </move>
>     <move todir="${path.data}">
>       <fileset basedir="${path.dae}">
>         <include name="${presentation_name}.bgf" />
>         <include name="${presentation_name}.nif" />
>         <include name="*.bvs" />
>         <include name="*.lua" />
>       </fileset>
>     </move>
> 
> Is there a built-in method for doing something like this (using
> FileSet perhaps) that I'm not seeing in Rake? If not, does someone
> else have a pre-built method that does this?

Use a file list to build up your list of files.  Eg.

   DAE_FILES = FileList[DAE, "#{PRESENTATION_NAME}_org.pgf"]

Then just use a mv command.  Unfortunately, using mv with a file list 
seems to require an explicit 'to_a' call.  That shouldn't be the case 
(I'll see if I can fix that in an update).

Example:

   task :move_files do
     mv DAE_FILES.to_a, PATH_INTERMEDIATE
   end

If you don't want errors on non-existent files, you can filter them out:

   task :move_files do
     mv DAE_FILES.select { |fn| File.exist?(fn) }.to_a, 
PATH_INTERMEDIATE
   end

Wordy, but it works.

-- Jim Weirich


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