#!/bin/bash

set -e

vexec() {
	local i fmt
	for (( i = 1; i <= $#; ++i )) ; do
		case ${!i} in
		*" "*) fmt="'%s'";;
		*) fmt="%s";;
		esac
		printf "${fmt}" "${!i}"
		if [[ $i -lt $# ]] ; then
			printf ' '
		else
			echo
		fi
	done
	exec "$@"
}

cd ~/chromiumos

d=/usr/local/google/home/vapier
if [[ ! -d ${d} ]] ; then
	exit 1
fi

if [[ -z ${UNSHARE} ]] ; then
	if type -P unshare >&/dev/null ; then
		exec sudo unshare -m -- sudo -u ${USER} \
			UNSHARE=true PATH="${PATH}" "$0" "$@"
	fi
	unset UNSHARE
fi

d+="/trybot"
mkdir -p "${d}"
if mount | grep -qs $d ; then
	echo "mounts found in $d"
	exit 1
fi
if [[ -L $d ]] ; then
	rd=$(readlink $d)
	if mount | grep -qs $rd ; then
		echo "mounts found in $rd"
		exit 1
	fi
fi

if [[ $1 == "--noclean" ]] ; then
	shift
elif [[ " $* " != *" --remote "* ]] ; then
	echo "Cleaning ${d}"
	pushd "${d}" >/dev/null
	clean=(
		built-sdk.tbz2
#		chroot
		new-sdk-chroot
		sdks
		src/build
		test_results.tgz
		trybot_archive
	)
	sudo rm -rf "${clean[@]}"
#	[[ -L .cache ]] && rm -f .cache || :
#	mkdir -p .cache
#	sudo mount --bind -n ~/chromiumos/.cache .cache
	popd >/dev/null
fi

# find all the buildbot branches
echo "Looking up repo branches"
repos=$(r b | cut -b4- | awk '$1 == "bb" {
	# Single repo output:
	#   bb                        | in src/third_party/portage-stable
	# Multi repo output:
	#   bb                        | in:
	#                                   src/third_party/portage-stable
	#                                   src/third_party/chromiumos-overlay
	if ($3 == "in")
		print $NF
	while (getline) {
		if ($2 == "|")
			break;
		print $NF;
	}
}')
if [[ -n ${repos} ]] ; then
	echo "Auto pulling patches from 'bb' branch in repos:"
	printf '\t%s\n' ${repos}

	p_flag=""
	for r in ${repos} ; do
		r=$(r list | awk -v r="${r}" '$1 == r { print $NF }')
		p_flag+="${r}:bb "
	done

	set -- -p "${p_flag}" "$@"
fi
set -- --cache-dir=~/chromiumos/.cache "$@"

vexec cbuildbot --buildroot=${d} "$@"