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