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