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parse-maintainers: Use perl hash references and specific filenames 

Instead of reading STDIN and writing STDOUT, use specific filenames of
MAINTAINERS and MAINTAINERS.new.

Use hash references instead of global hash %hash so future modifications
can read and write specific hashes to split up MAINTAINERS into multiple
files using a script.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joe Perches 2017-08-05 18:45:48 -07:00 committed by Linus Torvalds
parent 61f741645a
commit fe9090301f
1 changed files with 35 additions and 24 deletions
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59
scripts/parse-maintainers.pl
View File

@ -2,7 +2,7 @@
use strict;
my %hash;
my $P = $0;
# sort comparison functions
sub by_category($$) {
@ -45,20 +45,6 @@ sub by_pattern($$) {
}
}
sub alpha_output {
foreach my $key (sort by_category keys %hash) {
if ($key eq " ") {
chomp $hash{$key};
print $hash{$key};
} else {
print "\n" . $key . "\n";
foreach my $pattern (sort by_pattern split('\n', $hash{$key})) {
print($pattern . "\n");
}
}
}
}
sub trim {
my $s = shift;
$s =~ s/\s+$//;
@ -66,40 +52,65 @@ sub trim {
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 = " ";
$hash{$case} = "";
$$hashref{$case} = "";
while (<>) {
open(my $file, '<', "$filename") or die "$P: $filename: open failed - $!\n";
while (<$file>) {
my $line = $_;
# Pattern line?
if ($line =~ m/^([A-Z]):\s*(.*)/) {
$line = $1 . ":\t" . trim($2) . "\n";
if ($lastline eq "") {
$hash{$case} = $hash{$case} . $line;
$$hashref{$case} = $$hashref{$case} . $line;
next;
}
$case = trim($lastline);
exists $hash{$case} and die "Header '$case' already exists";
$hash{$case} = $line;
exists $$hashref{$case} and die "Header '$case' already exists";
$$hashref{$case} = $line;
$lastline = "";
next;
}
if ($case eq " ") {
$hash{$case} = $hash{$case} . $lastline;
$$hashref{$case} = $$hashref{$case} . $lastline;
$lastline = $line;
next;
}
trim($lastline) eq "" or die ("Odd non-pattern line '$lastline' for '$case'");
$lastline = $line;
}
$hash{$case} = $hash{$case} . $lastline;
$$hashref{$case} = $$hashref{$case} . $lastline;
close($file);
}
file_input();
alpha_output();
my %hash;
file_input(\%hash, "MAINTAINERS");
alpha_output(\%hash, "MAINTAINERS.new");
exit(0);