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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
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 }