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/build/unix/abs2rel.pl

http://github.com/zpao/v8monkey
Perl | 67 lines | 21 code | 8 blank | 38 comment | 3 complexity | 3c7a82aad6da9bdca3638eeeeabc138f MD5 | raw file
 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
 7# 1.1 (the "License"); you may not use this file except in compliance with
 8# the License. You may obtain a copy of the License at
 9# http://www.mozilla.org/MPL/
10#
11# Software distributed under the License is distributed on an "AS IS" basis,
12# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13# for the specific language governing rights and limitations under the
14# License.
15#
16# The Original Code is mozilla.org Code.
17#
18# The Initial Developer of the Original Code is
19# Netscape Communications Corporation.
20# Portions created by the Initial Developer are Copyright (C) 2002
21# the Initial Developer. All Rights Reserved.
22#
23# Contributor(s):
24#
25# Alternatively, the contents of this file may be used under the terms of
26# either of the GNU General Public License Version 2 or later (the "GPL"),
27# or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28# in which case the provisions of the GPL or the LGPL are applicable instead
29# of those above. If you wish to allow use of your version of this file only
30# under the terms of either the GPL or the LGPL, and not to allow others to
31# use your version of this file under the terms of the MPL, indicate your
32# decision by deleting the provisions above and replace them with the notice
33# and other provisions required by the GPL or the LGPL. If you do not delete
34# the provisions above, a recipient may use your version of this file under
35# the terms of any one of the MPL, the GPL or the LGPL.
36#
37# ***** END LICENSE BLOCK *****
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