linux/scripts/checkincludes.pl
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   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
  14use strict;
  15
  16sub 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
  23my $remove = 0;
  24
  25if ($#ARGV < 0) {
  26        usage();
  27}
  28
  29if ($#ARGV >= 1) {
  30        if ($ARGV[0] =~ /^-/) {
  31                if ($ARGV[0] eq "-r") {
  32                        $remove = 1;
  33                        shift;
  34                } else {
  35                        usage();
  36                }
  37        }
  38}
  39
  40foreach 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}
  90
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