#!/bin/sh

branch=master
while getopts b: opt; do
	case $opt in
		b) branch="$OPTARG";;
		\?) exit 1;;
	esac
done
shift $((OPTIND-1))

if [ -z "$1" ]; then
	git checkout "$branch"
	git pull upstream "$branch"
	git push
	git checkout fly
	git merge --no-edit "$branch"
	git push
else
	for dir; do
		git -C "$dir" checkout "$branch"
		git -C "$dir" pull upstream "$branch"
		git -C "$dir" push
		git -C "$dir" checkout fly
		git -C "$dir" merge --no-edit "$branch"
		git -C "$dir" push
	done
fi