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#!/bin/sh

## live-build(7) - System Build Scripts
## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
##
## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.


Check_package ()
{
	CHROOT="${1}"
	FILE="${2}"
	PACKAGE="${3}"

	Check_installed "${CHROOT}" "${FILE}" "${PACKAGE}"

	case "${INSTALL_STATUS}" in
		1)
			_LB_PACKAGES="${_LB_PACKAGES} ${PACKAGE}"
			;;

		2)
			Echo_error "You need to install %s on your host system." "${PACKAGE}"
			exit 1
			;;
	esac
}

Install_package ()
{
	if [ -n "${_LB_PACKAGES}" ] && [ "${LB_BUILD_WITH_CHROOT}" != "false" ]
	then
		Chroot chroot "apt-get install -o APT::Install-Recommends=false ${APT_OPTIONS} ${_LB_PACKAGES}"
	fi
}

Remove_package ()
{
	if [ -n "${_LB_PACKAGES}" ] && [ "${LB_BUILD_WITH_CHROOT}" != "false" ]
	then
		Chroot chroot "apt-get remove --purge ${APT_OPTIONS} ${_LB_PACKAGES}"
	fi
}

# Check_installed
# uses as return value global var INSTALL_STATUS
# INSTALL_STATUS : 0 if package is installed
#                  1 if package isn't installed and we're in an apt managed system
#                  2 if package isn't installed and we aren't in an apt managed system
Check_installed ()
{
	CHROOT="${1}"
	FILE="${2}"
	PACKAGE="${3}"

	if [ "${LB_BUILD_WITH_CHROOT}" = "true" ] && [ "${CHROOT}" = "chroot" ]
	then
		if Chroot chroot "dpkg-query -s ${PACKAGE}" 2> /dev/null | grep -qs "Status: install"
		then
			INSTALL_STATUS=0
		else
			INSTALL_STATUS=1
		fi
	else
		if which dpkg-query > /dev/null 2>&1
		then
			if Chroot chroot "dpkg-query -s ${PACKAGE}" 2> /dev/null | grep -qs "Status: install"
			then
				INSTALL_STATUS=0
			else
				INSTALL_STATUS=1
			fi
		else
			if [ ! -e "${FILE}" ]
			then
				INSTALL_STATUS=2
			else
				INSTALL_STATUS=0
			fi
		fi
	fi
}