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|
use utf8;
package vendorlib;
our $AUTHORITY = 'cpan:RKITOVER';
$vendorlib::VERSION = '0.12';
use strict;
use warnings;
use Config;
=encoding UTF-8
=head1 NAME
vendorlib - Use Only Core and Vendor Libraries in @INC
=head1 SYNOPSIS
#!/usr/bin/perl
use vendorlib;
use strict;
use warnings;
use SomeModule; # will only search in core and vendor paths
...
=head1 DESCRIPTION
In a system distribution such as Debian, it may be advisable for Perl programs
to ignore the user's CPAN-installed modules and only use the
distribution-provided modules to avoid possible breakage with newer and
unpackaged versions of modules.
To that end, this pragma will replace your C<@INC> with only the core and vendor
C<@INC> paths, ignoring site_perl and C<$ENV{PERL5LIB}> entirely.
It is recommended that you put C<use vendorlib;> as the first statement in your
program, before even C<use strict;> and C<use warnings;>.
=cut
sub import {
my @paths = (($^O ne 'MSWin32' ? ('/etc/perl') : ()), @Config{qw/
vendorarch
vendorlib
archlib
privlib
/});
# This grep MUST BE on copies of the paths to not trigger Config overload
# magic.
@paths = grep $_, @paths;
# remove duplicates
my @result;
while (my $path = shift @paths) {
if (@paths && $path eq $paths[0]) {
# ignore
}
else {
push @result, $path;
}
}
@paths = @result;
# fixup slashes for @INC on Win32
if ($^O eq 'MSWin32') {
s{\\}{/}g for @paths;
}
# expand tildes
if ($^O ne 'MSWin32') {
for my $path (@paths) {
if ($path =~ m{^~/+}) {
my $home = (getpwuid($<))[7];
$path =~ s|^~/+|${home}/|;
}
elsif (my ($user) = $path =~ /^~(\w+)/) {
my $home = (getpwnam($user))[7];
$path =~ s|^~${user}/+|${home}/|;
}
}
}
# remove any directories that don't actually exist
# this will also remove /etc/perl on non-Debian systems
@paths = grep -d, @paths;
@INC = @paths;
}
=head1 ACKNOWLEDGEMENTS
Thanks to mxey, jawnsy and ribasushi for help with the design.
=head1 AUTHOR
Rafael Kitover <rkitover@gmail.com>
=cut
__PACKAGE__; # End of vendorlib
|
