/build/unix/abs2rel.pl

 1#!env perl
 2
 3# ***** BEGIN LICENSE BLOCK *****
 4# Version: MPL 1.1/GPL 2.0/LGPL 2.1
 5#
 6# The contents of this file are subject to the Mozilla Public License Version
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16# The Original Code is mozilla.org Code.
17#
18# The Initial Developer of the Original Code is
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21# the Initial Developer. All Rights Reserved.
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38
39use File::Spec::Unix;
40use strict;
41
42print "Usage: $0 dest_path start_path\n" if ($#ARGV+1 != 2);
43my $finish = my_canonpath(shift);
44my $start = my_canonpath(shift);
45
46my $res = File::Spec::Unix->abs2rel($finish, $start);
47
48#print STDERR "abs2rel($finish,$start) = $res\n";
49print "$res\n";
50
51sub my_canonpath($) {
52    my ($file) = @_;
53    my (@inlist, @outlist, $dir);
54
55    # Do what File::Spec::Unix->no_upwards should do
56    my @inlist = split(/\//, File::Spec::Unix->canonpath($file));
57    foreach $dir (@inlist) {
58	if ($dir eq '..') {
59	    pop @outlist;
60	} else {
61	    push @outlist, $dir;
62	}
63    }
64    $file = join '/',@outlist;
65    return $file;
66}
67