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package Module::Find;
use 5.008001;
use strict;
use warnings;
use File::Spec;
use File::Find;
our $VERSION = '0.17';
our $basedir = undef;
our @results = ();
our $prune = 0;
our $followMode = 1;
our @ISA = qw(Exporter);
our @EXPORT = qw(findsubmod findallmod usesub useall setmoduledirs);
our @EXPORT_OK = qw(followsymlinks ignoresymlinks);
HideShow 57 lines of Pod
=encoding utf-8
=head1 NAME
Module::Find - Find and use installed modules in a (sub)category
=head1 SYNOPSIS
  use Module::Find;
  # use all modules in the Plugins/ directory
  @found = usesub Mysoft::Plugins;
  # use modules in all subdirectories
  @found = useall Mysoft::Plugins;
  # find all DBI::... modules
  @found = findsubmod DBI;
  # find anything in the CGI/ directory
  @found = findallmod CGI;
   
  # set your own search dirs (uses @INC otherwise)
  setmoduledirs(@INC, @plugindirs, $appdir);
   
  # not exported by default
  use Module::Find qw(ignoresymlinks followsymlinks);
   
  # ignore symlinks
  ignoresymlinks();
   
  # follow symlinks (default)
  followsymlinks();
=head1 DESCRIPTION
Module::Find lets you find and use modules in categories. This can be very 
useful for auto-detecting driver or plugin modules. You can differentiate
between looking in the category itself or in all subcategories.
If you want Module::Find to search in a certain directory on your 
harddisk (such as the plugins directory of your software installation),
make sure you modify C<@INC> before you call the Module::Find functions.
=head1 FUNCTIONS
=over
=item C<setmoduledirs(@directories)>
Sets the directories to be searched for modules. If not set, Module::Find
will use @INC. If you use this function, @INC will I<not> be included
automatically, so add it if you want it. Set to undef to revert to
default behaviour.
=cut
sub setmoduledirs {
    return @Module::Find::ModuleDirs = grep { defined } @_;
}
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=item C<@found = findsubmod Module::Category>
Returns modules found in the Module/Category subdirectories of your perl 
installation. E.g. C<findsubmod CGI> will return C<CGI::Session>, but 
not C<CGI::Session::File> .
=cut
sub findsubmod(*) {
        $prune = 1;
                 
        return _find($_[0]);
}
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=item C<@found = findallmod Module::Category>
Returns modules found in the Module/Category subdirectories of your perl 
installation. E.g. C<findallmod CGI> will return C<CGI::Session> and also 
C<CGI::Session::File> .
=cut
sub findallmod(*) {
        $prune = 0;
         
        return _find($_[0]);
}
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=item C<@found = usesub Module::Category>
Uses and returns modules found in the Module/Category subdirectories of your perl 
installation. E.g. C<usesub CGI> will return C<CGI::Session>, but 
not C<CGI::Session::File> .
If any module dies during loading, usesub will also die at this point.
=cut
sub usesub(*) {
        $prune = 1;
         
        my @r = _find($_[0]);
    local @INC = @Module::Find::ModuleDirs
        if (@Module::Find::ModuleDirs);
         
        foreach my $m (@r) {
                eval " require $m; import $m ; ";
                die $@ if $@;
        }
         
        return @r;
}
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=item C<@found = useall Module::Category>
Uses and returns modules found in the Module/Category subdirectories of your perl installation. E.g. C<useall CGI> will return C<CGI::Session> and also 
C<CGI::Session::File> .
If any module dies during loading, useall will also die at this point.
=cut
sub useall(*) {
        $prune = 0;
         
        my @r = _find($_[0]);
         
    local @INC = @Module::Find::ModuleDirs
        if (@Module::Find::ModuleDirs);
         
        foreach my $m (@r) {
                eval " require $m; import $m; ";
                die $@ if $@;
        }
         
        return @r;
}
# 'wanted' functions for find()
# you know, this would be a nice application for currying...
sub _wanted {
    my $name = File::Spec->abs2rel($_, $basedir);
    return unless $name && $name ne File::Spec->curdir() && substr($name, 0, 1) ne '.';
    if (-d && $prune) {
        $File::Find::prune = 1;
        return;
    }
    return unless /\.pm$/;
    $name =~ s|\.pm$||;
    $name = join('::', File::Spec->splitdir($name));
    push @results, $name;
}
# helper functions for finding files
sub _find(*) {
    my ($category) = @_;
    return undef unless defined $category;
    my $dir = File::Spec->catdir(split(/::|'/, $category));
    @results = ();
    foreach my $inc (@Module::Find::ModuleDirs ? @Module::Find::ModuleDirs : @INC) {
        if (ref $inc) {
            if (my @files = eval { $inc->files }) {
                push @results,
                    map { s/^\Q$category\E::// ? $_ : () }
                    map { s{/}{::}g; s{\.pm$}{}; $_ }
                    grep { /\.pm$/ }
                    @files;
            }
        }
        else {
            our $basedir = File::Spec->catdir($inc, $dir);
            next unless -d $basedir;
            find({wanted   => \&_wanted,
                  no_chdir => 1,
                  follow   => $followMode}, $basedir);
        }
    }
    # filter duplicate modules
    my %seen = ();
    @results = grep { not $seen{$_}++ } @results;
    @results = map "$category\::$_", @results;
    @results = map {
         ($_ =~ m{^(\w+(?:(?:::|')\w+)*)$})[0] || die "$_ does not look like a package name"
    } @results;
    return @results;
}
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=item C<ignoresymlinks()>
Do not follow symlinks. This function is not exported by default.
=cut
sub ignoresymlinks {
    $followMode = 0;
}
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=item C<followsymlinks()>
Follow symlinks (default behaviour). This function is not exported by default.
=cut
sub followsymlinks {
    $followMode = 1;
}
HideShow 142 lines of Pod
=back
=head1 HISTORY
=over 8
=item 0.01, 2004-04-22
Original version; created by h2xs 1.22
=item 0.02, 2004-05-25
Added test modules that were left out in the first version. Thanks to
Stuart Johnston for alerting me to this.
=item 0.03, 2004-06-18
Fixed a bug (non-localized $_) by declaring a loop variable in use functions.
Thanks to Stuart Johnston for alerting me to this and providing a fix.
Fixed non-platform compatibility by using File::Spec.
Thanks to brian d foy.
Added setmoduledirs and updated tests. Idea shamelessly stolen from
...errm... inspired by brian d foy.
=item 0.04, 2005-05-20
Added POD tests.
=item 0.05, 2005-11-30
Fixed issue with bugfix in PathTools-3.14.
=item 0.06, 2008-01-26
Module::Find now won't report duplicate modules several times anymore (thanks to Uwe Völker for the report and the patch)
=item 0.07, 2009-09-08
Fixed RT#38302: Module::Find now follows symlinks by default (can be disabled).
=item 0.08, 2009-09-08
Fixed RT#49511: Removed Mac OS X extended attributes from distribution
=item 0.09, 2010-02-26
Fixed RT#38302: Fixed META.yml generation (thanks very much to cpanservice for the help).
=item 0.10, 2010-02-26
Fixed RT#55010: Removed Unicode BOM from Find.pm.
=item 0.11, 2012-05-22
Fixed RT#74251: defined(@array) is deprecated under Perl 5.15.7.
Thanks to Roman F, who contributed the implementation.
=item 0.12, 2014-02-08
Fixed RT#81077: useall fails in taint mode
Thanks to Aran Deltac, who contributed the implementation and test.
Fixed RT#83596: Documentation doesn't describe behaviour if a module fails to load
Clarified documentation for useall and usesub.
Fixed RT#62923: setmoduledirs(undef) doesn't reset to searching @INC
Added more explicit tests.
Thanks to Colin Robertson for his input.
=item 0.13, 2015-03-09
This release contains two contributions from Moritz Lenz:
Link to Module::Pluggable and Class::Factory::Util in "SEE ALSO"
Align package name parsing with how perl does it (allowing single quotes as module separator)
Also, added a test for meta.yml
=item 0.14, 2019-12-25
A long overdue update. Thank you for the many contributions!
Fixed RT#99055: Removed file readability check (pull request contributed by Moritz Lenz)
Now supports @INC hooks (pull request contributed by Graham Knop)
Now filters out filenames starting with a dot (pull request contributed by Desmond Daignault)
Now uses strict (pull request contributed by Shlomi Fish)
Fixed RT#122016: test/ files show up in metacpan (bug report contributed by Karen Etheridge)
=item 0.15, 2019-12-26
Fixed RT#127657 (bug report contributed by Karen Etheridge): Module::Find now uses @ModuleDirs
(if specified) for loading modules. Previously, when using setmoduledirs() to set an array of
directories that did not contain @INC, Module::Find would find the modules correctly, but load
them from @INC.
=item 0.16, 2022-08-01
Fixes an issue where symlink tests failed on systems that do not support creation of symlinks.
The issue appears on Windows systems due to changed behaviour in C<File::Find> described 
in L<perl5/issue #19995|https://github.com/Perl/perl5/issues/19995>
Symlink tests were previously skipped if C<symlink()> is not available, and now
also if creation of a symlink is not possible.
Fixes L<issue #9|https://github.com/crenz/Module-Find/issues/9>. Note that on Windows system,
the patch to C<File::Find> from L<perl5/PR #20008|https://github.com/Perl/perl5/pull/20008> 
will be required for proper operation. 
=item 0.17, 2025-02-16
Fixes L<issue 13|https://github.com/crenz/Module-Find/issues/13> / L<148978|https://rt.cpan.org/Ticket/Display.html?id=148978>
where warnings where produced upon extracting the installation archive, which prevented installation under cpanm and other tools.
=back
=head1 DEVELOPMENT NOTES
The development repository for this module is hosted on GitHub: L<http://github.com/crenz/Module-Find/>. Please report any bugs by opening an issue there.
=head1 SEE ALSO
L<perl>, L<Module::Pluggable>, L<Class::Factory::Util>
=head1 AUTHOR
Christian Renz, E<lt>crenz@web42.comE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright 2004-2025 by Christian Renz <crenz@web42.com>. All rights reserved.
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself. 
=cut
1;