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package File::Find::Wanted;
=head1 NAME
File::Find::Wanted - More obvious wrapper around File::Find
=head1 VERSION
Version 1.00
our $VERSION = '1.00';
use strict;
use File::Find;
our @ISA = qw( Exporter );
our @EXPORT = qw( find_wanted );
File::Find is a great module, except that it doesn't actually find
anything. Its C<find()> function walks a directory tree and calls
a callback function. Unfortunately, the callback function is
deceptively called C<wanted>, which implies that it should return
a boolean saying whether you want the file. That's not how it
Most of the time you call C<find()>, you just want to build a list
of files. There are other modules that do this for you, most notably
Richard Clamp's great L<File::Find::Rule>, but in many cases, it's
overkill, and you need to learn a new syntax.
With the C<find_wanted> function, you supply a callback sub and a
list of starting directories, but the sub actually should return a
boolean saying whether you want the file in your list or not.
To get a list of all files ending in F<.jpg>:
my @files = find_wanted( sub { -f && /\.jpg$/ }, $dir );
For a list of all directories that are not F<CVS> or F<.svn>:
my @files = find_wanted( sub { -d && !/^(CVS|\.svn)$/ }, $dir ) );
It's easy, direct, and simple.
=head1 WHY DO THIS?
The cynical may say "that's just the same as doing this":
my @files;
find( sub { push @files, $File::Find::name if -f && /\.jpg$/ }, $dir );
Sure it is, but File::Find::Wanted makes it more obvious, and saves
a line of code. That's worth it to me. I'd like it if find_wanted()
made its way into the File::Find distro, but for now, this will do.
=head2 find_wanted( I<&wanted>, I<@directories> )
Descends through I<@directories>, calling the I<wanted> function as
it finds each file. The function returns a list of all the files and
directories for which the I<wanted> function returned a true value.
This is just a wrapper around C<File::Find::find()>. See L<File::Find>
for details on how to modify its behavior.
sub find_wanted {
my $func = shift;
my @files;
local $_;
find( sub { push @files, $File::Find::name if &$func }, @_ );
return @files;
Copyright 2005-2012 Andy Lester.
This program is free software; you can redistribute it and/or modify
it under the terms of the Artistic License v2.0.
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