linux/scripts/parse-maintainers.pl
Joe Perches b95c29a20f parse-maintainers: Move matching sections from MAINTAINERS
Allow any number of command line arguments to match either the
section header or the section contents and create new files.

Create MAINTAINERS.new and SECTION.new.

This allows scripting of the movement of various sections from
MAINTAINERS.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-08 11:16:14 -07:00

129 lines
2.7 KiB
Perl

#!/usr/bin/perl -w
use strict;
my $P = $0;
# sort comparison functions
sub by_category($$) {
my ($a, $b) = @_;
$a = uc $a;
$b = uc $b;
# This always sorts last
$a =~ s/THE REST/ZZZZZZ/g;
$b =~ s/THE REST/ZZZZZZ/g;
return $a cmp $b;
}
sub by_pattern($$) {
my ($a, $b) = @_;
my $preferred_order = 'MRPLSWTQBCFXNK';
my $a1 = uc(substr($a, 0, 1));
my $b1 = uc(substr($b, 0, 1));
my $a_index = index($preferred_order, $a1);
my $b_index = index($preferred_order, $b1);
$a_index = 1000 if ($a_index == -1);
$b_index = 1000 if ($b_index == -1);
if (($a1 =~ /^F$/ && $b1 =~ /^F$/) ||
($a1 =~ /^X$/ && $b1 =~ /^X$/)) {
return $a cmp $b;
}
if ($a_index < $b_index) {
return -1;
} elsif ($a_index == $b_index) {
return 0;
} else {
return 1;
}
}
sub trim {
my $s = shift;
$s =~ s/\s+$//;
$s =~ s/^\s+//;
return $s;
}
sub alpha_output {
my ($hashref, $filename) = (@_);
open(my $file, '>', "$filename") or die "$P: $filename: open failed - $!\n";
foreach my $key (sort by_category keys %$hashref) {
if ($key eq " ") {
chomp $$hashref{$key};
print $file $$hashref{$key};
} else {
print $file "\n" . $key . "\n";
foreach my $pattern (sort by_pattern split('\n', %$hashref{$key})) {
print $file ($pattern . "\n");
}
}
}
close($file);
}
sub file_input {
my ($hashref, $filename) = (@_);
my $lastline = "";
my $case = " ";
$$hashref{$case} = "";
open(my $file, '<', "$filename") or die "$P: $filename: open failed - $!\n";
while (<$file>) {
my $line = $_;
# Pattern line?
if ($line =~ m/^([A-Z]):\s*(.*)/) {
$line = $1 . ":\t" . trim($2) . "\n";
if ($lastline eq "") {
$$hashref{$case} = $$hashref{$case} . $line;
next;
}
$case = trim($lastline);
exists $$hashref{$case} and die "Header '$case' already exists";
$$hashref{$case} = $line;
$lastline = "";
next;
}
if ($case eq " ") {
$$hashref{$case} = $$hashref{$case} . $lastline;
$lastline = $line;
next;
}
trim($lastline) eq "" or die ("Odd non-pattern line '$lastline' for '$case'");
$lastline = $line;
}
$$hashref{$case} = $$hashref{$case} . $lastline;
close($file);
}
my %hash;
my %new_hash;
file_input(\%hash, "MAINTAINERS");
foreach my $type (@ARGV) {
foreach my $key (keys %hash) {
if ($key =~ /$type/ || $hash{$key} =~ /$type/) {
$new_hash{$key} = $hash{$key};
delete $hash{$key};
}
}
}
alpha_output(\%hash, "MAINTAINERS.new");
alpha_output(\%new_hash, "SECTION.new");
exit(0);