#!/bin/bash
# $Header: /home/cvsd/magellan-cvs/magellan-src/mage-buildroot/mage-buildroot.sh,v 1.4 2008-04-23 16:07:00 niro Exp $
#
# mage buildroot
# creates a buildroot to compile programms
# may get later into mage
#
# Niels Rogalla <niro@magellan-linux.de>
#

# default die function
die()
{
	echo -e ${COLRED}"Exited ${BASH_SOURCE} at line no ${BASH_LINENO}."${COLDEFAULT}
	echo -e ${COLRED}"$@"${COLDEFAULT}
	exit 1
}

installrc()
{
	local var="$1"

	# sanity checks
	[ -z "${MROOT}" ] && die "\$MROOT not given."
	echo "${var}" >> ${MROOT}/.installrc || die "add_initrc() adding \$var"
}

enter_chroot()
{
	[ ! -d ${MROOT}/proc ] && install -d ${MROOT}/proc
	[ ! -d ${MROOT}/dev ] && install -d ${MROOT}/dev
	[ ! -d ${MROOT}/sys ] && install -d ${MROOT}/sys

	mount -t proc proc ${MROOT}/proc
	mount -t sysfs sysfs ${MROOT}/sys
	mount -o bind /dev ${MROOT}/dev

	if [[ ${SMAGE_USE_CCACHE} = true ]] || [[ -f ${MROOT}/.ccache_enabled ]]
	then
		[ ! -d ${MROOT}/root/.ccache ] && install -d ${MROOT}/root/.ccache
		mount -o bind /root/.ccache ${MROOT}/root/.ccache
	fi

	chroot ${MROOT} /usr/bin/env -i \
		HOME=/root \
		TERM="${TERM}" \
		PS1='\u:\w\$ ' \
		PATH=/bin:/usr/bin:/sbin:/usr/sbin \
		/bin/bash /.installrc #|| die "chr00ting"

	umount ${MROOT}/dev
	umount ${MROOT}/proc
	umount ${MROOT}/sys

	[ -f ${MROOT}/.installrc ] && rm ${MROOT}/.installrc
}

# some sane defaults
MROOT="$1"
TARGET_PKG="$2"
MAGERC="/etc/mage.rc"
#MAGERC="/home/tjoke/mage.rc-buildroot"
MAGE_PROFILE="$(basename $(readlink /etc/mage-profile))"
TOOLCHAIN=toolchain
BASESYSTEM=common-devutils

[[ $(id -u ) != 0 ]] && die "you must be root"

# i need some settings and functions from mage
[ -f /etc/rc.d/init.d/functions ] &&  \
	source /etc/rc.d/init.d/functions || \
	die "Your /etc/mage.rc is missing. Aborting."

[ -f /etc/mage.rc.global ] &&  \
	source /etc/mage.rc.global || \
	die "/etc/mage.rc.global missing"

[ -f ${MAGERC} ] && source ${MAGERC} || \
	die "Your /etc/mage.rc is missing. Aborting."

[ -f ${MLIBDIR}/mage4.functions.sh ] && \
	source ${MLIBDIR}/mage4.functions.sh || \
	die "mage functions missing"

# sanity checks
[[ -z ${MROOT} ]] && die "\$MROOT not given."
[[ -z ${TARGET_PKG} ]] && die "\$TARGET_PKG not given."

# first install a toolchain and some common dev-utils using bootstrap2
# only if not already builded
if [ ! -f ${MROOT}/.buildroot_build_ok-${TOOLCHAIN}-${BASESYSTEM} ]
then
	mage-bootstrap \
		--root "${MROOT}" \
		--magerc "${MAGERC}" \
		--profile "${MAGE_PROFILE}" \
		--toolchain "${TOOLCHAIN}" \
		--basesystem "${BASESYSTEM}" \
		|| die "bootstrapping toolchain"

	# mark this as builded
	touch ${MROOT}/.buildroot_build_ok-${TOOLCHAIN}-${BASESYSTEM} || die "touch ok"

	# enable ccache
	[[ ${SMAGE_USE_CCACHE} = true ]] && touch ${MROOT}/.ccache_enabled
fi

#####################################################
# setup a chroot environment                        #
#####################################################
:> ${MROOT}/.installrc || die

# some needed env-vars and functions
installrc 'unset MROOT'
installrc 'env-rebuild'
installrc 'source /etc/profile'
installrc 'die() { echo -e ${COLRED}"Exited ${BASH_SOURCE} at line no ${BASH_LINENO}."${COLDEFAULT};echo -e ${COLRED}"$@"${COLDEFAULT}; exit 1; }'
installrc '[ -f /etc/rc.d/init.d/functions ] && . /etc/rc.d/init.d/functions' # || die "Your /etc/mage.rc is missing. Aborting."'
installrc '[ -f /etc/mage.rc.global ] &&  . /etc/mage.rc.global' # || die "/etc/mage.rc.global missing"'
installrc '[ -f /etc/mage.rc ] && . /etc/mage.rc' # || die "Your /etc/mage.rc is missing. Aborting."'
installrc '[ -f ${MLIBDIR}/mage4.functions.sh ] && . ${MLIBDIR}/mage4.functions.sh' # || die "mage functions missing"'
installrc "export FAKE_MROOT=\"${MROOT}\""
installrc "export TARGET_PKG=\"${TARGET_PKG}\""

# update mage only if buildroot already exists
[ -f ${MROOT}/.buildroot_build_ok-${TOOLCHAIN}-${BASESYSTEM} ] && installrc 'mage update'
installrc 'smage2 update'

# run part
cat >> ${MROOT}/.installrc << "EOF"

#####################################################
# now calculate the src-dependencies for TARGET_PKG #
#####################################################

# before anything run mage_setup
mage_setup || die "error in mage_setup()"

# first of all get the right pkg which going to be installed
PCAT="$(pname2pcat ${TARGET_PKG})"

# package does not exists
[ -z "${PCAT}" ] && die "Package '${TARGET_PKG}' does not exist."

# source the highest magefile of this pkg
PKGNAME=$(get_value_from_magefile PKGNAME $(get_highest_magefile ${PCAT} ${TARGET_PKG}))

# convert PKGNAME to PNAME/PVER/PBUILD
# we're working *only* with these three vars from here on
PNAME="$(pkgname2pname ${PKGNAME})"
PVER="$(pkgname2pver ${PKGNAME})"
PBUILD="$(pkgname2pbuild ${PKGNAME})"

if is_installed ${PCAT}/${PNAME}-${PVER}-${PBUILD}
then
	echo -en "Package "
	echo -en "${COLRED}${PCAT}/${PNAME}-${PVER}-${PBUILD}${COLDEFAULT}"
	echo -e  " already installed."
	exit 3
fi

# get all dependencies of this package
echo
echo -n "Calculating dependencies ... "
ALLDEPS="$(${MLIBDIR}/depwalker.sh \
	--method srcinstall \
	--pcat ${PCAT} \
	--pname ${PNAME} \
	--pver ${PVER} \
	--pbuild ${PBUILD})"
echo "done"

# remove TARGET_PKG from list
SRC_INSTALL_DEPS="$(get_highest_magefile ${PCAT} ${TARGET_PKG})"
INSTALL_DEPS="${ALLDEPS/${SRC_INSTALL_DEPS}/}"

echo
echo "---- environment -----"
echo "MROOT:    ${FAKE_MROOT}"
echo "PKGDIR:   ${PKGDIR}"
echo "BUILDDIR: ${BUILDDIR}"
echo "BINDIR:   ${BINDIR}"
echo "----------------------"
echo
echo "---- dependencies ----"
echo "SRC_INSTALL_DEPS:"
for i in ${SRC_INSTALL_DEPS}
do
	echo "   * ${i}"
done
echo "INSTALL_DEPS:"
for i in ${INSTALL_DEPS}
do
	echo "   * ${i}"
done
echo "----------------------"

#read

# now install the packages (no srcinstall, when the user not explcitly want this)
fetch_packages ${INSTALL_DEPS} || die "fetching packages"
md5sum_packages ${INSTALL_DEPS} || die "md5 sum packages"
unpack_packages ${INSTALL_DEPS} || die "unpacking packages"
install_packages ${INSTALL_DEPS} || die "installing packages"

# whipe out all packages
mage clean

# now src-install TARGET_PKG
install_packages --src-install ${SRC_INSTALL_DEPS} || die "src-installing packages"

# done
[[ ! -d /BUILDED ]] && install -d /BUILDED
mv ${PKGDIR}/${PNAME}-${PVER}-${ARCH}-${PBUILD}.mpk /BUILDED || die "pkg move"
echo -e "Package ${COLGREEN}${PCAT}/${PNAME}-${PVER}-${PBUILD}${COLDEFAULT} successfully builded."
echo "You will find this in ${FAKE_MROOT}/BUILDED."
EOF

# run this stuff
enter_chroot