#!/bin/sh

usage() {
	cat <<-EOF
	Usage: repo-cros [options]

	Options:
	   int            switch to internal tree
	   ext            switch to external tree
	   -b <branch>    switch branches (use "master" to get to ToT)
	   -r <path>      patch to reference repo (e.g. ~/chromiumos/)

	Operates on the repo in ${PWD}
	EOF
	exit ${1:-1}
}

vexec() {
	printf '%s\n%s\n' "${PWD}" "$*"
	exec "$@"
}

email="vapier@chromium.org"
REF=
BRANCH=
MANIFEST=
REPO_URL=
while [[ $# -gt 0 ]] ; do
	case $1 in
	int)
		MANIFEST='ssh://gerrit-int.chromium.org:29419/chromeos/manifest-internal.git'
		REPO_URL='http://git.chromium.org/external/repo.git'
		;;
	ext)
		MANIFEST='http://git.chromium.org/chromiumos/manifest.git'
		REPO_URL='http://git.chromium.org/external/repo.git'
		;;
	-b)
		BRANCH=$2
		shift
		;;
	-r)
		REF=$(realpath "$2")
		shift
		;;
	*)
		usage
		;;
	esac
	shift
done

rdir=$(realpath "`pwd`")
while [[ ! -d ${rdir}/.repo ]] ; do
	rdir=${rdir%/*}
	[[ ${rdir:-/} == "/" ]] && break
done
rdir+="/.repo"
if [[ -d ${rdir} ]] ; then
	gcfg() { git --git-dir="$1" config user.email "${@:2}" ; }
	if [[ $(gcfg "${rdir}/manifests.git") != "${email}" ]] ; then
		echo "${rdir}: setting e-mail to ${email}"
		find "${rdir}" -type d -name '*.git' | \
		while read d ; do
			gcfg "${d}" ${email}
		done
	fi
fi

vexec \
	repo init \
	${MANIFEST:+-u "${MANIFEST}"} \
	${REPO_URL:+--repo-url="${REPO_URL}"} \
	${REF:+--reference "${REF}"} \
	${BRANCH:+-b "${BRANCH}"}