package Module::Load; $VERSION = '0.16'; use strict; use File::Spec (); sub import { my $who = _who(); { no strict 'refs'; *{"${who}::load"} = *load; } } sub load (*;@) { my $mod = shift or return; my $who = _who(); if( _is_file( $mod ) ) { require $mod; } else { LOAD: { my $err; for my $flag ( qw[1 0] ) { my $file = _to_file( $mod, $flag); eval { require $file }; $@ ? $err .= $@ : last LOAD; } die $err if $err; } } ### This addresses #41883: Module::Load cannot import ### non-Exporter module. ->import() routines weren't ### properly called when load() was used. { no strict 'refs'; my $import; if (@_ and $import = $mod->can('import')) { unshift @_, $mod; goto &$import; } } } sub _to_file{ local $_ = shift; my $pm = shift || ''; my @parts = split /::/; ### because of [perl #19213], see caveats ### my $file = $^O eq 'MSWin32' ? join "/", @parts : File::Spec->catfile( @parts ); $file .= '.pm' if $pm; ### on perl's before 5.10 (5.9.5@31746) if you require ### a file in VMS format, it's stored in %INC in VMS ### format. Therefor, better unixify it first ### Patch in reply to John Malmbergs patch (as mentioned ### above) on p5p Tue 21 Aug 2007 04:55:07 $file = VMS::Filespec::unixify($file) if $^O eq 'VMS'; return $file; } sub _who { (caller(1))[0] } sub _is_file { local $_ = shift; return /^\./ ? 1 : /[^\w:']/ ? 1 : undef #' silly bbedit.. } 1; __END__ =pod =head1 NAME Module::Load - runtime require of both modules and files =head1 SYNOPSIS use Module::Load; my $module = 'Data:Dumper'; load Data::Dumper; # loads that module load 'Data::Dumper'; # ditto load $module # tritto my $script = 'some/script.pl' load $script; load 'some/script.pl'; # use quotes because of punctuations load thing; # try 'thing' first, then 'thing.pm' load CGI, ':standard' # like 'use CGI qw[:standard]' =head1 DESCRIPTION C eliminates the need to know whether you are trying to require either a file or a module. If you consult C you will see that C will behave differently when given a bareword or a string. In the case of a string, C assumes you are wanting to load a file. But in the case of a bareword, it assumes you mean a module. This gives nasty overhead when you are trying to dynamically require modules at runtime, since you will need to change the module notation (C) to a file notation fitting the particular platform you are on. C eliminates the need for this overhead and will just DWYM. =head1 Rules C has the following rules to decide what it thinks you want: =over 4 =item * If the argument has any characters in it other than those matching C<\w>, C<:> or C<'>, it must be a file =item * If the argument matches only C<[\w:']>, it must be a module =item * If the argument matches only C<\w>, it could either be a module or a file. We will try to find C first in C<@INC> and if that fails, we will try to find C in @INC. If both fail, we die with the respective error messages. =back =head1 Caveats Because of a bug in perl (#19213), at least in version 5.6.1, we have to hardcode the path separator for a require on Win32 to be C, like on Unix rather than the Win32 C<\>. Otherwise perl will not read its own %INC accurately double load files if they are required again, or in the worst case, core dump. C cannot do implicit imports, only explicit imports. (in other words, you always have to specify explicitly what you wish to import from a module, even if the functions are in that modules' C<@EXPORT>) =head1 ACKNOWLEDGEMENTS Thanks to Jonas B. Nielsen for making explicit imports work. =head1 BUG REPORTS Please report bugs or other issues to Ebug-module-load@rt.cpan.org. =head1 AUTHOR This module by Jos Boumans Ekane@cpan.orgE. =head1 COPYRIGHT This library is free software; you may redistribute and/or modify it under the same terms as Perl itself. =cut