#!/bin/sh

set -e

repos="
	.
	data/xonotic-data.pk3dir
	data/xonotic-maps.pk3dir
	data/xonotic-music.pk3dir
	darkplaces
"

if [ "$#" = 0 ]; then
	set -- help
fi
cmd=$1
shift

d0=`pwd`
case "$cmd" in
	update|pull)
		base=`git config remote.origin.url`
		base=${base%/xonotic.git}
		for d in $repos; do
			if [ -d "$d0/$d" ]; then
				cd "$d0/$d"
				git config remote.origin.url "$base/${d##*/}.git"
				git pull
				cd "$d0"
			else
				git clone "$base/${d##*/}.git" "$d0/$d"
			fi
		done
		;;
	checkout)
		remote=$1
		branch=$2
		if [ -z "$branch" ]; then
			branch=$remote
			remote=origin
		fi
		exists=false
		for d in $repos; do
			cd "$d0/$d"
			if git rev-parse "refs/heads/$branch" >/dev/null 2>&1; then
				exists=true
				git checkout "$branch"
			elif git rev-parse "refs/remotes/$remote/$branch" >/dev/null 2>&1; then
				exists=true
				git checkout --track -b "$branch" "$remote/$branch"
			else
				git checkout master
			fi
			cd "$d0"
		done
		"$0" branch
		;;
	branch)
		remote=$1
		branch=$2
		if [ -z "$branch" ]; then
			branch=$remote
			remote=origin
		fi
		if [ -z "$branch" ]; then
			for d in $repos; do
				cd "$d0/$d"
				r=`git symbolic-ref HEAD`
				r=${r#refs/heads/}
				echo "$d is at $r"
				cd "$d0"
			done
		else
			for d in $repos; do
				cd "$d0/$d"
				a=
				while [ x"$a" != x"y" -a x"$a" != x"n" ]; do
					echo "Branch in $d?"
					read -r a
				done
				if [ x"$a" = x"y" ]; then
					git push "$remote" HEAD:"$branch"
					git checkout --track -b "$branch" "$remote/$branch"
				fi
				cd "$d0"
			done
			"$0" branch
		fi
		;;
	branches)
		for d in $repos; do
			cd "$d0/$d"
			echo "In $d:"
			git branch -a | sed 's/^/  /'
			cd "$d0"
		done
		;;
	push)
		for d in $repos; do
			cd "$d0/$d"
			r=`git symbolic-ref HEAD`
			r=${r#refs/heads/}
			a=
			if git log "origin/$r".."$r" | grep .; then
				while [ x"$a" != x"y" -a x"$a" != x"n" ]; do
					echo "Push $r in $d?"
					read -r a
				done
				if [ x"$a" = x"y" ]; then
					git push `git config "branch.$r.remote" || echo origin` HEAD
				fi
			fi
			cd "$d0"
		done
		;;
	*)
		echo "Usage:"
		echo "  $0 pull"
		echo "  $0 push"
		echo "  $0 branches"
		echo "  $0 branch"
		echo "  $0 checkout"
		;;
esac