extra code in pp_concat, Take 2
[p5sagit/p5-mst-13.2.git] / lib / blib.pm
CommitLineData
49624702 1package blib;
2
3=head1 NAME
4
5blib - Use MakeMaker's uninstalled version of a package
6
7=head1 SYNOPSIS
8
9 perl -Mblib script [args...]
10
11 perl -Mblib=dir script [args...]
12
13=head1 DESCRIPTION
14
15Looks for MakeMaker-like I<'blib'> directory structure starting in
16I<dir> (or current directory) and working back up to five levels of '..'.
17
18Intended for use on command line with B<-M> option as a way of testing
19arbitary scripts against an uninstalled version of a package.
20
21However it is possible to :
22
23 use blib;
24 or
25 use blib '..';
26
27etc. if you really must.
28
29=head1 BUGS
30
31Pollutes global name space for development only task.
32
33=head1 AUTHOR
34
35Nick Ing-Simmons nik@tiuk.ti.com
36
e69a2255 37=cut
49624702 38
39use Cwd;
e69a2255 40use File::Spec;
49624702 41
a635c943 42use vars qw($VERSION $Verbose);
e69a2255 43$VERSION = '1.02';
a635c943 44$Verbose = 0;
49624702 45
46sub import
47{
48 my $package = shift;
49 my $dir = getcwd;
fe6f1558 50 if ($^O eq 'VMS') { ($dir = VMS::Filespec::unixify($dir)) =~ s-/\z--; }
49624702 51 if (@_)
52 {
49624702 53 $dir = shift;
fe6f1558 54 $dir =~ s/blib\z//;
55 $dir =~ s,/+\z,,;
e69a2255 56 $dir = File::Spec->curdir unless ($dir);
49624702 57 die "$dir is not a directory\n" unless (-d $dir);
58 }
e69a2255 59 my $i = 5;
60 my($blib, $blib_lib, $blib_arch);
49624702 61 while ($i--)
62 {
e69a2255 63 $blib = File::Spec->catdir($dir, "blib");
64 $blib_lib = File::Spec->catdir($blib, "lib");
65
66 if ($^O eq 'MacOS')
67 {
68 $blib_arch = File::Spec->catdir($blib_lib, $MacPerl::Architecture);
69 }
70 else
71 {
72 $blib_arch = File::Spec->catdir($blib, "arch");
73 }
74
75 if (-d $blib && -d $blib_arch && -d $blib_lib)
49624702 76 {
e69a2255 77 unshift(@INC,$blib_arch,$blib_lib);
a635c943 78 warn "Using $blib\n" if $Verbose;
49624702 79 return;
80 }
e69a2255 81 $dir = File::Spec->catdir($dir, File::Spec->updir);
49624702 82 }
83 die "Cannot find blib even in $dir\n";
84}
85
861;