build-aux/sodepends.pl

   1 # Copyright (c) 2008, 2011 Nicira, Inc.
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at:
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 use strict;
  16 use warnings;
  17 use Getopt::Long;
  18
  19 our ($exit_code) = 0;
  20
  21 our (@include_dirs);
  22 Getopt::Long::Configure ("bundling");
  23 GetOptions("I|include=s" => \@include_dirs) or exit(1);
  24 @include_dirs = ('.') if !@include_dirs;
  25
  26 sub find_file {
  27     my ($name) = @_;
  28     foreach my $dir (@include_dirs, '.') {
  29         my $file = "$dir/$name";
  30         if (stat($file)) {
  31             return $file;
  32         }
  33     }
  34     print STDERR "$name not found in: ", join(' ', @include_dirs), "\n";
  35     $exit_code = 1;
  36     return;
  37 }
  38
  39 print "# Generated automatically -- do not modify!    -*- buffer-read-only: t -*-\n";
  40 for my $toplevel (sort(@ARGV)) {
  41     # Skip names that don't end in .in.
  42     next if $toplevel !~ /\.in$/;
  43
  44     # Open file.
  45     my ($fn) = find_file($toplevel);
  46     next if !defined($fn);
  47     if (!open(OUTER, '<', $fn)) {
  48         print "$fn: open: $!\n";
  49         $exit_code = 1;
  50         next;
  51     }
  52
  53     my (@dependencies);
  54   OUTER:
  55     while (<OUTER>) {
  56         if (my ($name) = /^\.so (\S+)$/) {
  57             push(@dependencies, $name) if find_file($name);
  58         }
  59     }
  60     close(OUTER);
  61
  62     my ($output) = $toplevel;
  63     $output =~ s/\.in//;
  64
  65     print "\n$output:";
  66     print " \\\n\t$_" foreach $toplevel, sort(@dependencies);
  67     print "\n";
  68     print "$_:\n" foreach $toplevel, sort(@dependencies);
  69 }
  70 exit $exit_code;