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be9cdb87 NIS |
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 | ||
41 | warn __FILE__; | |
42 | ||
43 | sub import | |
44 | { | |
45 | my $package = shift; | |
46 | my $dir = getcwd; | |
47 | if (@_) | |
48 | { | |
49 | print join(',',@_),"\n"; | |
50 | $dir = shift; | |
51 | $dir =~ s/blib$//; | |
52 | $dir =~ s,/+$,,; | |
53 | $dir = '.' unless ($dir); | |
54 | die "$dir is not a directory\n" unless (-d $dir); | |
55 | } | |
56 | my $i = 5; | |
57 | while ($i--) | |
58 | { | |
59 | my $blib = "${dir}/blib"; | |
60 | if (-d $blib && -d "$blib/arch" && -d "$blib/lib") | |
61 | { | |
62 | unshift(@INC,"$blib/arch","$blib/lib"); | |
63 | warn "Using $blib"; | |
64 | return; | |
65 | } | |
66 | $dir .= "/.."; | |
67 | } | |
68 | die "Cannot find blib even in $dir\n"; | |
69 | } | |
70 | ||
71 | 1; |