#!/usr/bin/perl -w
my %mailmap = ();
open I, "<", ".mailmap";
while (<I>) {
chomp;
next if /^#/;
if (my ($author, $mail) = /^(.*?)\s+<(.+)>$/) {
$mailmap{$mail} = $author;
}
}
close I;
my %mail2author = ();
open I, "git log --pretty='format:%ae %an' |";
while (<I>) {
chomp;
my ($mail, $author) = split(/\t/, $_);
next if exists $mailmap{$mail};
$mail2author{$mail} ||= {};
$mail2author{$mail}{$author} ||= 0;
$mail2author{$mail}{$author}++;
}
close I;
while (my ($mail, $authorcount) = each %mail2author) {
# %$authorcount is ($author => $count);
# sort and show the names from the most frequent ones.
my @names = (map { $_->[0] }
sort { $b->[1] <=> $a->[1] }
map { [$_, $authorcount->{$_}] }
keys %$authorcount);
if (1 < @names) {
for (@names) {
print "$_ <$mail>\n";
}
}
}