#!/bin/sh

# $Header: /home/cvsd/magellan-cvs/magellan-src/mage/usr/lib/mage/env-rebuild.sh,v 1.13 2007-07-01 00:35:29 niro Exp $
#
# rebuilds /etc/{ld.so.conf,profile.env} with given files from /etc/env.d
#

##
# exp. /etc/env.d/kde
#
#	PATH="/opt/kde/bin"
#	ROOTPATH="/opt/kde/bin"
#	LDPATH="/opt/kde/lib"
#
##

# sets root path
P="${MROOT}"
SPECIALVARS="KDEDIRS PATH CLASSPATH LDPATH MANPATH INFODIR INFOPATH ROOTPATH CONFIG_PROTECT CONFIG_PROTECT_MASK CONFIG_PROTECT_IGNORE PRELINK_PATH PRELINK_PATH_MASK OMF_DIR LIBGL_DRIVERS_PATH XDG_CONFIG_DIRS XDG_DATA_DIRS"

# secure tmp dir
if [ -x /bin/mktemp ]
then
	TMPDIR="$(/bin/mktemp -d -p /var/tmp)"
else
	TMPDIR="/var/tmp/tmp.$$"
	install -d ${TMPDIR}
fi

echo -en "\n>>>> Rebuilding environment... "

# clean existing conf files
:> ${P}/etc/ld.so.conf
:> ${P}/etc/profile.env

# gets everything in /etc/env.d
for file in ${P}/etc/env.d/*
do
	# abort if "empty"
	[[ ${file} = ${P}/etc/env.d/\* ]] && continue

	# reads content of every file
	while read path
	do
		# ignore if empty or a comment
		case "${path}" in
			\#*|"") continue ;;
		esac

		# writes LDPATH to ${P}/etc/ld.so.conf,
		# anything else to ${P}/etc/profile.env
		if [[ ${path%%=*} = LDPATH ]]
		then
			#substitudes " from $path if exists
			path="${path//\"}"	#}" <--- make code readable again :)
			echo "${path##*=}" >> ${P}/etc/ld.so.conf
		else
			# checks if var exists in specialvars
			for i in ${SPECIALVARS}
			do
				[[ ${path%%=*} = ${i} ]] && SPECVAR="yes"
			done

			if [[ ${SPECVAR} = yes ]]
			then
				case ${path%%=*} in
					CONFIG_PROTECT*|XDG*)
						# CONFIG_PROTECT*|XDG* have as delimiter  not ':'  but ' '
						path="${path//\"}"	#}" <--- make code readable again :)
						echo -n "${path##*=} " >> ${TMPDIR}/${path%%=*}
						unset SPECVAR
						;;
					*)
						# special var are written to tmpfile
						# to substitude them to one variable
						# substitudes " from $path if exists
						path="${path//\"}"	#}" <--- make code readable again :)
						echo -n "${path##*=}:" >> ${TMPDIR}/${path%%=*}
						unset SPECVAR
						;;
				esac
			else
				# all other vars go directly to /etc/profile.env
				echo "export ${path}" >> ${P}/etc/profile.env
			fi
		fi
	done << EOF
$(cat ${file})
EOF

done

# reads special vars tmp files and writes them to /etc/profile.env
for i in ${SPECIALVARS}
do
	if [ -f ${TMPDIR}/${i} ]
	then
		# only OMF_DIR goes to /etc/scrollkeeper.conf
		if [[ ${i} = OMF_DIR ]]
		then
			echo "${i}=$(cat ${TMPDIR}/${i})" > ${P}/etc/scrollkeeper.conf
		else
			echo "export ${i}=\"$(cat ${TMPDIR}/${i})\"" >> ${P}/etc/profile.env
		fi
		rm ${TMPDIR}/${i}
	fi
done

# rebuilds environment
ldconfig -r "${P}" -f /etc/ld.so.conf -C /etc/ld.so.cache
[ -f ${P}/etc/profile ] && source ${P}/etc/profile

# cleanups
[ -d ${TMPDIR} ] && rm -rf ${TMPDIR}

echo -e "done.\n"