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#!/usr/bin/env perl
#
# (C) 2003-2025 Anope Team
# Contact us at team@anope.org
#
# Please read COPYING and README for further details.
#
# Based on the original code of Epona by Lara.
# Based on the original code of Services by Andy Church.

use v5.26.0;
use strict;
use warnings FATAL => qw(all);

use File::Basename        qw(dirname);
use File::Spec::Functions qw(catfile);
use FindBin               qw($RealDir);

my %committers;
for my $committer (split /\n+/, `git log --pretty='%an <%ae>%n%(trailers:key=Co-Authored-By,valueonly)' HEAD`) {
	$committers{$committer} ||= 0;
	$committers{$committer} += 1;
}

my %authors;
for my $committer (keys %committers) {
	open(my $fh, '-|', 'git', 'check-mailmap', $committer);
	chomp(my $author = <$fh>);
	close $fh;

	$author = $1 if $author =~ /^(.+) <(?:\S+\@localhost|\S+\@users.noreply.github.com)>$/;
	next if $author =~ /\[bot\]$/;
	next if $author =~ /^\(svnadmin\)$/;

	$authors{$author} ||= 0;
	$authors{$author} += $committers{$committer};
}


my $author_file = catfile dirname(dirname($RealDir)), 'docs', 'AUTHORS.txt';
open(my $fh, '>', $author_file) or die "Unable to write $author_file: $!";
say $fh <<"EOH";
Since the first commit in March 2004 ${\scalar %authors} people have submitted patches, commits,
and other useful contributions to Anope. These people, ordered by the number of
contributions they have made, are:
EOH

for my $author (sort { $authors{$b} <=> $authors{$a} or lc($a) cmp lc($b) } keys %authors) {
	say $fh "  * $author";
}
close $fh;

if ($ENV{MKAUTHORS_COMMIT} // 1) {
	system 'git', 'commit',
		'--message', 'Update author list.',
		'--', $author_file;
}