<b_jonas> perl -e-e($o="bin/culprits-ng") and die; open$O,">",$o or die; print $O qq{#!/bin/sh\\n},q{exec hg log -l 512 --template "{desc}\\0" -- "$@" | perl -0ne \'/^<([^>]*)>/ and!$t{$1}++and print"$1 "\'}; close$O;chmod 0755,$o or die;

#!/bin/sh
count () {
    hg log --template '{desc}\n' |
    egrep '<[^]]*> karma\'$1 |
    fgrep -vix "<$2> karma$1 $2" |
    cut -d' ' -f3 |
    fgrep -cix "$2"
}
plus=$(count + "$1")
minus=$(count - "$1")
echo $(($plus-$minus))