#!/bin/bash

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

	Options:
	   depot_tools    clone depot_tools tree
	   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/)
	   -g <group>
	   -m <manifest>
	   -e <email>

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

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

email="vapier@chromium.org"
REF=
BRANCH=
MANIFEST=
MANIFEST_NAME=
RGROUPS=()
REPO_URL=
while [[ $# -gt 0 ]] ; do
	case $1 in
	depot_tools|dt)
		exec git clone https://git.chromium.org/chromium/tools/depot_tools.git
		;;
	int)
		MANIFEST='https://chrome-internal.googlesource.com/chromeos/manifest-internal.git'
		REPO_URL='https://chromium.googlesource.com/external/repo.git'
		;;
	ext)
		MANIFEST='https://chromium.googlesource.com/chromiumos/manifest.git'
		REPO_URL='https://chromium.googlesource.com/external/repo.git'
		;;
	-b)
		BRANCH=$2
		shift
		;;
	-r)
		REF=$(realpath "${2:-$(echo ~/chromiumos)}")
		shift
		;;
	-g)
		RGROUPS+=( "$2" )
		shift
		;;
	-m)
		MANIFEST_NAME="${2%.xml}.xml"
		shift
		;;
	-e)
		email=$2
		shift
		;;
	*)
		usage
		;;
	esac
	shift
done

if [[ ${#BRANCH} -eq 3 ]] && [[ -d ${REF} ]] ; then
	BRANCH=$(git --git-dir="${REF}/.repo/manifests.git" branch -a | grep -o "release-${BRANCH}.*")
fi

v repo init \
	${MANIFEST:+-u "${MANIFEST}"} \
	${REPO_URL:+--repo-url="${REPO_URL}"} \
	${REF:+--reference "${REF}"} \
	${MANIFEST_NAME:+-m "${MANIFEST_NAME}"} \
	${RGROUPS:+-g "${RGROUPS[*]}"} \
	${BRANCH:+-b "${BRANCH}"}

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

exit 0