git blame, kind of recursively

reblame.sh

#!/bin/bash -e
# Small script to blame a file and recursivelly go through possible previous commits
# Needs the "xsel" binary / package installed
# Usage: reblame filename
# - will git blame the file on the HEAD
# - (user) X11 select commit id
# - show commit or git blame the parent of the selected commit
# - repeat

filename=$1
hash=HEAD
reblame=1

while :; do
	if [ -n "$reblame" ]; then
		git blame "$hash" -- "$filename"
		hash=$(xsel -o)
	fi

	read -p "[S]how or [d]ig? ($hash) " input

	if [ -z "$input" -o "$input" == "S" -o "$input" == "s" ]; then
		git show $hash
		reblame=""
	elif [ "$input" == "D" -o "$input" == "d" ]; then
		hash=$hash^
		reblame=1
	else
		break
	fi
done