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#!/usr/bin/env perl
# SPDX-License-Identifier: GPL-2.0
#
# checkincludes: find/remove files included more than once
#
# Copyright abandoned, 2000, Niels Kristian Bech Jensen <nkbj@image.dk>.
# Copyright 2009 Luis R. Rodriguez <mcgrof@gmail.com>
#
# This script checks for duplicate includes. It also has support
# to remove them in place. Note that this will not take into
# consideration macros so you should run this only if you know
# you do have real dups and do not have them under #ifdef's. You
# could also just review the results.
use strict;
sub usage {
print "Usage: checkincludes.pl [-r]\n";
print "By default we just warn of duplicates\n";
print "To remove duplicated includes in place use -r\n";
exit 1;
}
my $remove = 0;
if ($#ARGV < 0) {
usage();
}
if ($#ARGV >= 1) {
if ($ARGV[0] =~ /^-/) {
if ($ARGV[0] eq "-r") {
$remove = 1;
shift;
} else {
usage();
}
}
}
my $dup_counter = 0;
foreach my $file (@ARGV) {
open(my $f, '<', $file)
or die "Cannot open $file: $!.\n";
my %includedfiles = ();
my @file_lines = ();
while (<$f>) {
if (m/^\s*#\s*include\s*[<"](\S*)[>"]/o) {
++$includedfiles{$1};
}
push(@file_lines, $_);
}
close($f);
if (!$remove) {
foreach my $filename (keys %includedfiles) {
if ($includedfiles{$filename} > 1) {
print "$file: $filename is included more than once.\n";
++$dup_counter;
}
}
next;
}
open($f, '>', $file)
or die("Cannot write to $file: $!");
my $dups = 0;
foreach (@file_lines) {
if (m/^\s*#\s*include\s*[<"](\S*)[>"]/o) {
foreach my $filename (keys %includedfiles) {
if ($1 eq $filename) {
if ($includedfiles{$filename} > 1) {
$includedfiles{$filename}--;
$dups++;
++$dup_counter;
} else {
print {$f} $_;
}
}
}
} else {
print {$f} $_;
}
}
if ($dups > 0) {
print "$file: removed $dups duplicate includes\n";
}
close($f);
}
if ($dup_counter == 0) {
print "No duplicate includes found.\n";
}
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