#!/bin/sh

branch_name=$(git symbolic-ref --quiet HEAD)
if [[ $? -ne 0 ]] ; then
	echo "not on a branch"
	exit 1
fi

branch_name=${branch_name/refs\/heads\//}

git fetch
if [[ $? -ne 0 ]] ; then
	exit $?
fi

if test $(git rev-parse HEAD) = $(git merge-base HEAD origin/$branch_name) ; then
	git rebase "origin/$branch_name"
else
	GIT_EDITOR=: git rebase -p -i "origin/$branch_name"
fi