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package blib;
=head1 NAME
blib - Use MakeMaker's uninstalled version of a package
=head1 SYNOPSIS
perl -Mblib script [args...]
perl -Mblib=dir script [args...]
=head1 DESCRIPTION
Looks for MakeMaker-like I<'blib'> directory structure starting in
I<dir> (or current directory) and working back up to five levels of '..'.
Intended for use on command line with B<-M> option as a way of testing
arbitary scripts against an uninstalled version of a package.
However it is possible to :
use blib;
or
use blib '..';
etc. if you really must.
=head1 BUGS
Pollutes global name space for development only task.
=head1 AUTHOR
Nick Ing-Simmons nik@tiuk.ti.com
=cut
use Cwd;
use vars qw($VERSION);
$VERSION = '1.00';
sub import
{
my $package = shift;
my $dir = getcwd;
if ($^O eq 'VMS') { ($dir = VMS::Filespec::unixify($dir)) =~ s-/\z--; }
if (@_)
{
$dir = shift;
$dir =~ s/blib\z//;
$dir =~ s,/+\z,,;
$dir = '.' unless ($dir);
die "$dir is not a directory\n" unless (-d $dir);
}
my $i = 5;
while ($i--)
{
my $blib = "${dir}/blib";
if (-d $blib && -d "$blib/arch" && -d "$blib/lib")
{
unshift(@INC,"$blib/arch","$blib/lib");
warn "Using $blib\n";
return;
}
$dir .= "/..";
}
die "Cannot find blib even in $dir\n";
}
1;
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