#!/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

# rebase-p-i stops if nothing to do, even a ff, so do a non-i-p if needed
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