mailmap-clean.sh

#!/usr/bin/env bash

set -eu -o pipefail
shopt -s lastpipe

repo=~/src-haskell/xmonad-tmp

function mailmap-diff {
	diff -au \
		<(cd "$repo"; git shortlog --summary --email) \
		<((cd "$repo"; git log --pretty=short --no-mailmap) | (git shortlog --summary --email))
}

sedscript=''

wc -l "$repo"/.mailmap | read -r lines _
for l in $(seq 1 $lines); do
	sedscript2="${sedscript}${l}d;"
	sed -e "$sedscript2" <"$repo"/.mailmap >.mailmap
	if mailmap-diff >/dev/null; then
		sedscript="$sedscript2"
	fi
done

sed -e "$sedscript" <"$repo"/.mailmap >.mailmap-clean