xref: /openbmc/linux/scripts/checkincludes.pl (revision c4c3c32d) 
1#!/usr/bin/env perl
2# SPDX-License-Identifier: GPL-2.0
3#
4# checkincludes: find/remove files included more than once
5#
6# Copyright abandoned, 2000, Niels Kristian Bech Jensen <nkbj@image.dk>.
7# Copyright 2009 Luis R. Rodriguez <mcgrof@gmail.com>
8#
9# This script checks for duplicate includes. It also has support
10# to remove them in place. Note that this will not take into
11# consideration macros so you should run this only if you know
12# you do have real dups and do not have them under #ifdef's. You
13# could also just review the results.
14
15use strict;
16
17sub usage {
18	print "Usage: checkincludes.pl [-r]\n";
19	print "By default we just warn of duplicates\n";
20	print "To remove duplicated includes in place use -r\n";
21	exit 1;
22}
23
24my $remove = 0;
25
26if ($#ARGV < 0) {
27	usage();
28}
29
30if ($#ARGV >= 1) {
31	if ($ARGV[0] =~ /^-/) {
32		if ($ARGV[0] eq "-r") {
33			$remove = 1;
34			shift;
35		} else {
36			usage();
37		}
38	}
39}
40
41my $dup_counter = 0;
42
43foreach my $file (@ARGV) {
44	open(my $f, '<', $file)
45	    or die "Cannot open $file: $!.\n";
46
47	my %includedfiles = ();
48	my @file_lines = ();
49
50	while (<$f>) {
51		if (m/^\s*#\s*include\s*[<"](\S*)[>"]/o) {
52			++$includedfiles{$1};
53		}
54		push(@file_lines, $_);
55	}
56
57	close($f);
58
59	if (!$remove) {
60		foreach my $filename (keys %includedfiles) {
61			if ($includedfiles{$filename} > 1) {
62				print "$file: $filename is included more than once.\n";
63				++$dup_counter;
64			}
65		}
66		next;
67	}
68
69	open($f, '>', $file)
70	    or die("Cannot write to $file: $!");
71
72	my $dups = 0;
73	foreach (@file_lines) {
74		if (m/^\s*#\s*include\s*[<"](\S*)[>"]/o) {
75			foreach my $filename (keys %includedfiles) {
76				if ($1 eq $filename) {
77					if ($includedfiles{$filename} > 1) {
78						$includedfiles{$filename}--;
79						$dups++;
80						++$dup_counter;
81					} else {
82						print {$f} $_;
83					}
84				}
85			}
86		} else {
87			print {$f} $_;
88		}
89	}
90	if ($dups > 0) {
91		print "$file: removed $dups duplicate includes\n";
92	}
93	close($f);
94}
95
96if ($dup_counter == 0) {
97	print "No duplicate includes found.\n";
98}
99