#!/bin/sh

set -e
#set -x

cur=`git symbolic-ref HEAD`
case "$cur" in
	refs/heads/*)
		cur=${cur#refs/heads/}
		;;
	*)
		echo >&2 "Not in a branch"
		exit 1
		;;
esac
git update-index -q --refresh

if git diff-index --quiet --cached HEAD --ignore-submodules -- && git diff-files --quiet --ignore-submodules; then
	stashed=false
else
	git stash save
	stashed=true
fi

eval `git for-each-ref --shell --format='
	b=%(refname);
	b=${b#refs/heads/};
	if git config branch.$b.merge >/dev/null && git config branch.$b.remote >/dev/null; then
		git checkout "$b";
		git pull || true;
	fi;
' refs/heads/`
git checkout "$cur"
if $stashed; then
	git stash pop --index
fi