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49624702 CS |
1 | package blib; |
2 | ||
3 | =head1 NAME | |
4 | ||
5 | blib - 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 | ||
15 | Looks for MakeMaker-like I<'blib'> directory structure starting in | |
16 | I<dir> (or current directory) and working back up to five levels of '..'. | |
17 | ||
18 | Intended for use on command line with B<-M> option as a way of testing | |
19 | arbitary scripts against an uninstalled version of a package. | |
20 | ||
21 | However it is possible to : | |
22 | ||
23 | use blib; | |
24 | or | |
25 | use blib '..'; | |
26 | ||
27 | etc. if you really must. | |
28 | ||
29 | =head1 BUGS | |
30 | ||
31 | Pollutes global name space for development only task. | |
32 | ||
33 | =head1 AUTHOR | |
34 | ||
35 | Nick Ing-Simmons nik@tiuk.ti.com | |
36 | ||
37 | =cut | |
38 | ||
39 | use Cwd; | |
40 | ||
90248788 TB |
41 | use vars qw($VERSION); |
42 | $VERSION = '1.00'; | |
49624702 CS |
43 | |
44 | sub import | |
45 | { | |
46 | my $package = shift; | |
47 | my $dir = getcwd; | |
fc1ce8cc | 48 | if ($^O eq 'VMS') { ($dir = VMS::Filespec::unixify($dir)) =~ s-/$--; } |
49624702 CS |
49 | if (@_) |
50 | { | |
49624702 CS |
51 | $dir = shift; |
52 | $dir =~ s/blib$//; | |
53 | $dir =~ s,/+$,,; | |
54 | $dir = '.' unless ($dir); | |
55 | die "$dir is not a directory\n" unless (-d $dir); | |
56 | } | |
57 | my $i = 5; | |
58 | while ($i--) | |
59 | { | |
60 | my $blib = "${dir}/blib"; | |
61 | if (-d $blib && -d "$blib/arch" && -d "$blib/lib") | |
62 | { | |
63 | unshift(@INC,"$blib/arch","$blib/lib"); | |
5f05dabc | 64 | warn "Using $blib\n"; |
49624702 CS |
65 | return; |
66 | } | |
67 | $dir .= "/.."; | |
68 | } | |
69 | die "Cannot find blib even in $dir\n"; | |
70 | } | |
71 | ||
72 | 1; |