scripts/checkincludes.pl

   1 #!/usr/bin/perl
   2 #
   3 # checkincludes: find/remove files included more than once
   4 #
   5 # Copyright abandoned, 2000, Niels Kristian Bech Jensen <nkbj@image.dk>.
   6 # Copyright 2009 Luis R. Rodriguez <mcgrof@gmail.com>
   7 #
   8 # This script checks for duplicate includes. It also has support
   9 # to remove them in place. Note that this will not take into
  10 # consideration macros so you should run this only if you know
  11 # you do have real dups and do not have them under #ifdef's. You
  12 # could also just review the results.
  13
  14 use strict;
  15
  16 sub usage {
  17         print "Usage: checkincludes.pl [-r]\n";
  18         print "By default we just warn of duplicates\n";
  19         print "To remove duplicated includes in place use -r\n";
  20         exit 1;
  21 }
  22
  23 my $remove = 0;
  24
  25 if ($#ARGV < 0) {
  26         usage();
  27 }
  28
  29 if ($#ARGV >= 1) {
  30         if ($ARGV[0] =~ /^-/) {
  31                 if ($ARGV[0] eq "-r") {
  32                         $remove = 1;
  33                         shift;
  34                 } else {
  35                         usage();
  36                 }
  37         }
  38 }
  39
  40 foreach my $file (@ARGV) {
  41         open(my $f, '<', $file)
  42             or die "Cannot open $file: $!.\n";
  43
  44         my %includedfiles = ();
  45         my @file_lines = ();
  46
  47         while (<$f>) {
  48                 if (m/^\s*#\s*include\s*[<"](\S*)[>"]/o) {
  49                         ++$includedfiles{$1};
  50                 }
  51                 push(@file_lines, $_);
  52         }
  53
  54         close($f);
  55
  56         if (!$remove) {
  57                 foreach my $filename (keys %includedfiles) {
  58                         if ($includedfiles{$filename} > 1) {
  59                                 print "$file: $filename is included more than once.\n";
  60                         }
  61                 }
  62                 next;
  63         }
  64
  65         open($f, '>', $file)
  66             or die("Cannot write to $file: $!");
  67
  68         my $dups = 0;
  69         foreach (@file_lines) {
  70                 if (m/^\s*#\s*include\s*[<"](\S*)[>"]/o) {
  71                         foreach my $filename (keys %includedfiles) {
  72                                 if ($1 eq $filename) {
  73                                         if ($includedfiles{$filename} > 1) {
  74                                                 $includedfiles{$filename}--;
  75                                                 $dups++;
  76                                         } else {
  77                                                 print {$f} $_;
  78                                         }
  79                                 }
  80                         }
  81                 } else {
  82                         print {$f} $_;
  83                 }
  84         }
  85         if ($dups > 0) {
  86                 print "$file: removed $dups duplicate includes\n";
  87         }
  88         close($f);
  89 }