#!/bin/sh

update_svn() {
	DIR=$(cd "$1" && pwd -P)
	[ -d "$DIR" ] || return 0

	echo "== $DIR"
#	svn upgrade "$DIR"
	svn up "$DIR"
}

update_git() {
	local staged=false
	local branch= remote= merge=

	cd "$1" || return 1
	echo "== $PWD"

	git fetch -q --all --prune
	git remote | xargs -r git fetch -q --multiple --prune --tags

	if [ -n "$(git ls-files -md)" ]; then
		if git stash -q; then
			staged=true
		fi
	fi

	branch=`git branch | sed -ne 's!* \(.\)!\1!p'`
	remote=`git config "branch.${branch}.remote"`
	merge=`git config "branch.${branch}.merge"`

	git rebase -q "$remote/${merge##refs/heads/}"
	if $staged; then
		git stash pop -q
		git status -s
	fi

	cd - > /dev/null
}

update_repo() {
	cd "$1" || return 1
	echo "== $PWD"

	repo sync

	cd - > /dev/null
}

if [ $# -eq 0 ]; then
	if git rev-parse --is-inside-work-tree > /dev/null; then
		set -- "$(git rev-parse --show-toplevel)"
	else
		set -- .
	fi
fi

for d; do
	if [ -e "$d/.git" ]; then
		mode=git
	elif [ -d "$d/.svn" ]; then
		mode=svn
	elif [ -d "$d/.repo" ]; then
		mode=repo
	else
		continue
	fi

	update_${mode} "$d"
done