/[jscoverage]/trunk/js/build/unix/mddepend.pl
ViewVC logotype

Annotation of /trunk/js/build/unix/mddepend.pl

Parent Directory Parent Directory | Revision Log Revision Log


Revision 399 - (hide annotations)
Tue Dec 9 03:37:47 2008 UTC (13 years, 6 months ago) by siliconforks
File MIME type: text/plain
File size: 5168 byte(s)
Use SpiderMonkey from Firefox 3.1b2.

1 siliconforks 399 #!/usr/bin/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 this file as it was released upon March 8, 1999.
17     #
18     # The Initial Developer of the Original Code is
19     # Netscape Communications Corporation.
20     # Portions created by the Initial Developer are Copyright (C) 1999
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    
39     # mddepend.pl - Reads in dependencies generated my -MD flag. Prints list
40     # of objects that need to be rebuilt. These can then be added to the
41     # PHONY target. Using this script copes with the problem of header
42     # files that have been removed from the build.
43     #
44     # Usage:
45     # mddepend.pl <output_file> <dependency_files...>
46     #
47     # Send comments, improvements, bugs to Steve Lamm (slamm@netscape.com).
48    
49     use strict;
50    
51     use constant DEBUG => 0;
52    
53     my $outfile = shift @ARGV;
54     my $silent = $ENV{MAKEFLAGS} =~ /^\w*s|\s-s/;
55    
56     my $line = '';
57     my %alldeps;
58     # Parse dependency files
59     while (<>) {
60     s/\r?\n$//; # Handle both unix and DOS line endings
61     $line .= $_;
62     if ($line =~ /\\$/) {
63     chop $line;
64     next;
65     }
66    
67     my ($obj,$rest) = split /\s*:\s+/, $line, 2;
68     $line = '';
69     next if !$obj || !$rest;
70    
71     my @deps = split /\s+/, $rest;
72     push @{$alldeps{$obj}}, @deps;
73     if (DEBUG >= 2) {
74     foreach my $dep (@deps) { print "add $obj $dep\n"; }
75     }
76     }
77    
78     # Test dependencies
79     my %modtimes; # cache
80     my @objs; # force rebuild on these
81     OBJ_LOOP: foreach my $obj (keys %alldeps) {
82     my $mtime = (stat $obj)[9] or next;
83    
84     my %not_in_cache;
85     my $deps = $alldeps{$obj};
86     foreach my $dep_file (@{$deps}) {
87     my $dep_mtime = $modtimes{$dep_file};
88     if (not defined $dep_mtime) {
89     print "Skipping $dep_file for $obj, will stat() later\n" if DEBUG >= 2;
90     $not_in_cache{$dep_file} = 1;
91     next;
92     }
93    
94     print "Found $dep_file in cache\n" if DEBUG >= 2;
95    
96     if ($dep_mtime > $mtime) {
97     print "$dep_file($dep_mtime) newer than $obj($mtime)\n" if DEBUG;
98     }
99     elsif ($dep_mtime == -1) {
100     print "Couldn't stat $dep_file for $obj\n" if DEBUG;
101     }
102     else {
103     print "$dep_file($dep_mtime) older than $obj($mtime)\n" if DEBUG >= 2;
104     next;
105     }
106    
107     push @objs, $obj; # dependency is missing or newer
108     next OBJ_LOOP; # skip checking the rest of the dependencies
109     }
110    
111     foreach my $dep_file (keys %not_in_cache) {
112     print "STAT $dep_file for $obj\n" if DEBUG >= 2;
113     my $dep_mtime = $modtimes{$dep_file} = (stat $dep_file)[9] || -1;
114    
115     if ($dep_mtime > $mtime) {
116     print "$dep_file($dep_mtime) newer than $obj($mtime)\n" if DEBUG;
117     }
118     elsif ($dep_mtime == -1) {
119     print "Couldn't stat $dep_file for $obj\n" if DEBUG;
120     }
121     else {
122     print "$dep_file($dep_mtime) older than $obj($mtime)\n" if DEBUG >= 2;
123     next;
124     }
125    
126     push @objs, $obj; # dependency is missing or newer
127     next OBJ_LOOP; # skip checking the rest of the dependencies
128     }
129    
130     # If we get here it means nothing needs to be done for $obj
131     }
132    
133     # Output objects to rebuild (if needed).
134     if (@objs) {
135     my $old_output;
136     my $new_output = "@objs: FORCE\n";
137    
138     # Read in the current dependencies file.
139     open(OLD, "<$outfile")
140     and $old_output = <OLD>;
141     close(OLD);
142    
143     # Only write out the dependencies if they are different.
144     if ($new_output ne $old_output) {
145     open(OUT, ">$outfile") and print OUT "$new_output";
146     print "Updating dependencies file, $outfile\n" unless $silent;
147     if (DEBUG) {
148     print "new: $new_output\n";
149     print "was: $old_output\n" if $old_output ne '';
150     }
151     }
152     } elsif (-s $outfile) {
153     # Remove the old dependencies because all objects are up to date.
154     print "Removing old dependencies file, $outfile\n" unless $silent;
155    
156     if (DEBUG) {
157     my $old_output;
158     open(OLD, "<$outfile")
159     and $old_output = <OLD>;
160     close(OLD);
161     print "was: $old_output\n";
162     }
163    
164     unlink $outfile;
165     }

  ViewVC Help
Powered by ViewVC 1.1.24