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Edit File : Loaded.pm \| Size : 3.27 KB
package Module::Loaded; use strict; use Carp qw[carp]; BEGIN { use base 'Exporter'; use vars qw[@EXPORT $VERSION]; $VERSION = '0.08'; @EXPORT = qw[mark_as_loaded mark_as_unloaded is_loaded]; } =head1 NAME Module::Loaded - mark modules as loaded or unloaded =head1 SYNOPSIS use Module::Loaded; $bool = mark_as_loaded('Foo'); # Foo.pm is now marked as loaded $loc = is_loaded('Foo'); # location of Foo.pm set to the # loaders location eval "require 'Foo'"; # is now a no-op $bool = mark_as_unloaded('Foo'); # Foo.pm no longer marked as loaded eval "require 'Foo'"; # Will try to find Foo.pm in @INC =head1 DESCRIPTION When testing applications, often you find yourself needing to provide functionality in your test environment that would usually be provided by external modules. Rather than munging the C<%INC> by hand to mark these external modules as loaded, so they are not attempted to be loaded by perl, this module offers you a very simple way to mark modules as loaded and/or unloaded. =head1 FUNCTIONS =head2 $bool = mark_as_loaded( PACKAGE ); Marks the package as loaded to perl. C<PACKAGE> can be a bareword or string. If the module is already loaded, C<mark_as_loaded> will carp about this and tell you from where the C<PACKAGE> has been loaded already. =cut sub mark_as_loaded () { my $pm = shift; my $file = __PACKAGE__->_pm_to_file( $pm ) or return; my $who = [caller]->[1]; my $where = is_loaded( $pm ); if ( defined $where ) { carp "'$pm' already marked as loaded ('$where')"; } else { $INC{$file} = $who; } return 1; } =head2 $bool = mark_as_unloaded( PACKAGE ); Marks the package as unloaded to perl, which is the exact opposite of C<mark_as_loaded>. C<PACKAGE> can be a bareword or string. If the module is already unloaded, C<mark_as_unloaded> will carp about this and tell you the C<PACKAGE> has been unloaded already. =cut sub mark_as_unloaded () { my $pm = shift; my $file = __PACKAGE__->_pm_to_file( $pm ) or return; unless( defined is_loaded( $pm ) ) { carp "'$pm' already marked as unloaded"; } else { delete $INC{ $file }; } return 1; } =head2 $loc = is_loaded( PACKAGE ); C<is_loaded> tells you if C<PACKAGE> has been marked as loaded yet. C<PACKAGE> can be a bareword or string. It returns falls if C<PACKAGE> has not been loaded yet and the location from where it is said to be loaded on success. =cut sub is_loaded (*) { my $pm = shift; my $file = __PACKAGE__->_pm_to_file( $pm ) or return; return $INC{$file} if exists $INC{$file}; return; } sub _pm_to_file { my $pkg = shift; my $pm = shift or return; my $file = join '/', split '::', $pm; $file .= '.pm'; return $file; } =head1 BUG REPORTS Please report bugs or other issues to E<lt>bug-module-loaded@rt.cpan.org<gt>. =head1 AUTHOR This module by Jos Boumans E<lt>kane@cpan.orgE<gt>. =head1 COPYRIGHT This library is free software; you may redistribute and/or modify it under the same terms as Perl itself. =cut # Local variables: # c-indentation-style: bsd # c-basic-offset: 4 # indent-tabs-mode: nil # End: # vim: expandtab shiftwidth=4: 1; Back

Edit File : Loaded.pm | Size : 3.27 KB

package Module::Loaded;

use strict;
use Carp qw[carp];

BEGIN { use base 'Exporter';
        use vars qw[@EXPORT $VERSION];

$VERSION = '0.08';
        @EXPORT  = qw[mark_as_loaded mark_as_unloaded is_loaded];
}

=head1 NAME

Module::Loaded - mark modules as loaded or unloaded

=head1 SYNOPSIS

use Module::Loaded;

$bool = mark_as_loaded('Foo');   # Foo.pm is now marked as loaded
    $loc  = is_loaded('Foo');        # location of Foo.pm set to the
                                     # loaders location
    eval "require 'Foo'";            # is now a no-op

$bool = mark_as_unloaded('Foo'); # Foo.pm no longer marked as loaded
    eval "require 'Foo'";            # Will try to find Foo.pm in @INC

=head1 DESCRIPTION

When testing applications, often you find yourself needing to provide
functionality in your test environment that would usually be provided
by external modules. Rather than munging the C<%INC> by hand to mark
these external modules as loaded, so they are not attempted to be loaded
by perl, this module offers you a very simple way to mark modules as
loaded and/or unloaded.

=head1 FUNCTIONS

=head2 $bool = mark_as_loaded( PACKAGE );

Marks the package as loaded to perl. C<PACKAGE> can be a bareword or
string.

If the module is already loaded, C<mark_as_loaded> will carp about
this and tell you from where the C<PACKAGE> has been loaded already.

=cut

sub mark_as_loaded (*) {
    my $pm      = shift;
    my $file    = __PACKAGE__->_pm_to_file( $pm ) or return;
    my $who     = [caller]->[1];

my $where   = is_loaded( $pm );
    if ( defined $where ) {
        carp "'$pm' already marked as loaded ('$where')";

} else {
        $INC{$file} = $who;
    }

return 1;
}

=head2 $bool = mark_as_unloaded( PACKAGE );

Marks the package as unloaded to perl, which is the exact opposite
of C<mark_as_loaded>. C<PACKAGE> can be a bareword or string.

If the module is already unloaded, C<mark_as_unloaded> will carp about
this and tell you the C<PACKAGE> has been unloaded already.

=cut

sub mark_as_unloaded (*) {
    my $pm      = shift;
    my $file    = __PACKAGE__->_pm_to_file( $pm ) or return;

unless( defined is_loaded( $pm ) ) {
        carp "'$pm' already marked as unloaded";

} else {
        delete $INC{ $file };
    }

return 1;
}

=head2 $loc = is_loaded( PACKAGE );

C<is_loaded> tells you if C<PACKAGE> has been marked as loaded yet.
C<PACKAGE> can be a bareword or string.

It returns falls if C<PACKAGE> has not been loaded yet and the location
from where it is said to be loaded on success.

=cut

sub is_loaded (*) {
    my $pm      = shift;
    my $file    = __PACKAGE__->_pm_to_file( $pm ) or return;

return $INC{$file} if exists $INC{$file};

return;
}

sub _pm_to_file {
    my $pkg = shift;
    my $pm  = shift or return;

my $file = join '/', split '::', $pm;
    $file .= '.pm';

return $file;
}

=head1 BUG REPORTS

Please report bugs or other issues to E<lt>bug-module-loaded@rt.cpan.org<gt>.

=head1 AUTHOR

This module by Jos Boumans E<lt>kane@cpan.orgE<gt>.

=head1 COPYRIGHT

This library is free software; you may redistribute and/or modify it
under the same terms as Perl itself.

=cut

# Local variables:
# c-indentation-style: bsd
# c-basic-offset: 4
# indent-tabs-mode: nil
# End:
# vim: expandtab shiftwidth=4:

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