#!/bin/bash

BUILDSERVER_CACHE_DIR="/var/cache/mage-buildserver"
SMAGEFILE="$1"

if [ -f /etc/rc.d/init.d/functions ]
then
	source /etc/rc.d/init.d/functions
else
	die "/etc/rc.d/init.d/functions not found"
fi
if [ -f /etc/mage.rc.global ]
then
	source /etc/mage.rc.global
else
	die "/etc/mage.rc.global not found"
fi
if [ -f /etc/mage.rc ]
then
	source /etc/mage.rc
else
	die "/etc/mage.rc not found"
fi
if [ -f ${MLIBDIR}/mage4.functions.sh ]
then
	source ${MLIBDIR}/mage4.functions.sh
else
	die "${MLIBDIR}/mage4.functions.sh not found"
fi
if [ -f ${MLIBDIR}/smage2.functions.sh ]
then
	source ${MLIBDIR}/smage2.functions.sh
else
	die "${MLIBDIR}/smage2.functions.sh not found"
fi

# do this at least of all includes to prevent path overwrites
env-rebuild
source /etc/profile

# export default path
export PATH="${PATH}:${MLIBDIR}"

die()
{
	echo "ERROR: $@"
	exit 1
}

is_split_target_magefile()
{
	local mage="$1"

	for target_mage in ${MY_SPLIT_TARGET_MAGEFILES}
	do
		if [[ ${mage} = ${target_mage} ]]
		then
			return 0
		fi
	done

	return 1
}

load_mage_features
mage_setup

if [[ -z ${SMAGEFILE} ]]
then
	die "no smage file given. call '$(basename $0) with/relative/path/from/buildroot/svn/smage/to/smagefile'"
fi

if [ -f ${SMAGESCRIPTSDIR}/${SMAGEFILE} ]
then
	# be silent
	FVERBOSE=off \
	SILENT=1 \
	smagesource ${SMAGESCRIPTSDIR}/${SMAGEFILE}
else
	die "smagefile '${SMAGESCRIPTSDIR}/${SMAGEFILE}' not found."
fi

# create build info dir
install -d ${BUILDSERVER_CACHE_DIR}/build/${PNAME}

if [ ! -f ${BUILDSERVER_CACHE_DIR}/build/${PNAME}/${PNAME}-${PVER}-${PBUILD}/INSTALL_DEPS ]
then
	die "${BUILDSERVER_CACHE_DIR}/build/${PNAME}/${PNAME}-${PVER}-${PBUILD}/INSTALL_DEPS missing. run 'buildserver-build-depends first"
fi

if [ ! -f ${BUILDSERVER_CACHE_DIR}/build/${PNAME}/${PNAME}-${PVER}-${PBUILD}/SRC_INSTALL_DEPS ]
then
	die "${BUILDSERVER_CACHE_DIR}/build/${PNAME}/${PNAME}-${PVER}-${PBUILD}/SRC_INSTALL_DEPS missing. run 'buildserver-build-depends first"
fi

INSTALL_DEPS="$(< ${BUILDSERVER_CACHE_DIR}/build/${PNAME}/${PNAME}-${PVER}-${PBUILD}/INSTALL_DEPS)"
SRC_INSTALL_DEPS="$(< ${BUILDSERVER_CACHE_DIR}/build/${PNAME}/${PNAME}-${PVER}-${PBUILD}/SRC_INSTALL_DEPS)"

if [[ -z ${SRC_INSTALL_DEPS} ]]
then
	die "buildserver-build-uninstall-prerequisites: SRC_INSTALL_DEPS are empty, aborting."
fi

#reverse dep order
unset REV_INSTALL_DEPS
for dep in ${INSTALL_DEPS}
do
	if [[ -z ${REV_INSTALL_DEPS} ]]
	then
		REV_INSTALL_DEPS="${dep}"
	else
		REV_INSTALL_DEPS="${dep} ${REV_INSTALL_DEPS}"
	fi
done

# remove all previously installed packages
echo
echo "Cleaning buildroot - removing previously installed packages in reversed order:"
echo "---- dependencies ----"
echo "SRC_INSTALL_DEPS:"
for i in ${SRC_INSTALL_DEPS}
do
	echo "   * ${i}"
done
echo "INSTALL_DEPS:"
for i in ${REV_INSTALL_DEPS}
do
	echo "   * ${i}"
done
echo "----------------------"

for pkg in ${SRC_INSTALL_DEPS} ${REV_INSTALL_DEPS} 
do
	uninstall_list=""
	pname="$(magename2pname ${pkg})"
	pcat="$(magename2pcat ${pkg})"
	pver="$(magename2pver ${pkg})"
	pbuild="$(magename2pbuild ${pkg})"
	if [ -f ${BUILDSERVER_CACHE_DIR}/protected/${pname} ]
	then
		echo "'${pcat}/${pname}-${pver}-${pbuild}' is protected - ignoring"
	else
		if is_installed ${pcat}/${pname}-${pver}-${pbuild}
		then
			if [[ -z ${uninstall_list} ]]
			then
				uninstall_list="${pcat}/${pname}-${pver}-${pbuild}"
			else
				uninstall_list="${uninstall_list} ${pcat}/${pname}-${pver}-${pbuild}"
			fi
		else
			echo "'${pcat}/${pname}-${pver}-${pbuild}' not installed - ignoring"
		fi

		if [[ -n ${uninstall_list} ]]
		then
			uninstall_packages "${uninstall_list}" || die "cleaning buildroot: ${pkg}"
		else
			echo "uninstall_list is empty for pkg '${pcat}/${pname}-${pver}-${pbuild}' - doing nothing"
		fi
	fi
done

# mark prerequisites as uninstalled
touch ${BUILDSERVER_CACHE_DIR}/build/${PNAME}/${PNAME}-${PVER}-${PBUILD}/UNSTALLED_PREREQUISITES