#!/bin/bash

#
# builds packages from given dir
#

# version: 0.3.6-r8

PKGSUFFIX="mpk"
PKGNAME="$1"
SEARCHDIRS="$2"
MLIBDIR=/usr/lib/mage

COLRED="\033[1;6m\033[31m"
COLGREEN="\033[1;6m\033[32m"
COLDEFAULT="\033[0m"

if [ -z "$1" ]
then
	echo "No package name given. Aborting."
fi

if [ -z "$2" ]
then
	echo "No source dir given. Aborting."
fi

if [ -f /etc/mage.rc ]
then
	source /etc/mage.rc
else
	echo "Your /etc/mage.rc is missing. Aborting."
	exit 1
fi
source ${MLIBDIR}/mage3.functions.sh

build_preinstall() {
	if [ -d ${BUILDDIR}/${PKGNAME} ]
	then
		rm -rf ${BUILDDIR}/${PKGNAME}
	fi

	install -d ${BUILDDIR}/${PKGNAME}/binfiles
	touch ${BUILDDIR}/${PKGNAME}/.dirs
	touch ${BUILDDIR}/${PKGNAME}/.symlinks
	touch ${BUILDDIR}/${PKGNAME}/.files
	touch ${BUILDDIR}/${PKGNAME}/.pipes
	touch ${BUILDDIR}/${PKGNAME}/.char
}

build_postinstall() {
	
	echo
	echo "Fetching files for package '${PKGNAME}' ..."

	#md5sums will only be generated for files: $M_MD5SUM
	
	#sets mtime to same value of the $BINDIR: $M_MTIME
	#only needed for files and symlinks
	M_MTIME=$(stat -c %Y ${BINDIR})
	
	#install mtime to package (needed for later checks)
	echo "${M_MTIME}" > ${BUILDDIR}/${PKGNAME}/.mtime

	#!! we use § as field seperator !!
	# doing so prevent us to get errors by filenames with spaces
	BUILD_TODELFILES=$(find ${SEARCHDIRS} -printf %p§)
	
	#sets fieldseperator to "§" instead of " "
	IFS=§

	for I in $BUILD_TODELFILES
	do
		CHECK_SRCDIR="$(echo ${I#${SEARCHDIRS}*}|grep $BUILDDIR)"

		if [ -z "$CHECK_SRCDIR" ]
		then
			FILETYPE="$(stat -c %F $I)"
			FILEPOSIX="$(stat -c %a $I)"
			FILEOWNER="$(stat -c %U $I)"
			FILEGROUP="$(stat -c %G $I)"

			if [ "${FILEOWNER}" == "UNKNOWN" ]
			then
				FILEOWNER="root"
			fi

			if [ "${FILEGROUP}" == "UNKNOWN" ]
			then
				FILEGROUP="root"
			fi

			case "${FILETYPE}" in
				"directory")
					if [ "$I" != "${SEARCHDIRS}" ]
					then
						echo "${I#${SEARCHDIRS}*}§${FILEPOSIX}§${FILEOWNER}§${FILEGROUP}" >> ${BUILDDIR}/${PKGNAME}/.dirs
					fi
					;;
			
				"symbolic link")
					LNKDEST="$(readlink $I)"
					echo "${I#${SEARCHDIRS}*}§${FILEPOSIX}§${LNKDEST#${SEARCHDIRS}*}§${M_MTIME}" >> ${BUILDDIR}/${PKGNAME}/.symlinks
					;;
					

				"regular empty file")
					FILEDIR="$(dirname $I)"
					FILEDIR="${FILEDIR#${SEARCHDIRS}*}"
					M_MD5SUM="$(md5sum ${I}|cut -d' ' -f1)"
					echo "${I#${SEARCHDIRS}*}§${FILEPOSIX}§${FILEOWNER}§${FILEGROUP}§${M_MTIME}§${M_MD5SUM}" >> ${BUILDDIR}/${PKGNAME}/.files
					install -d ${BUILDDIR}/${PKGNAME}/binfiles/${FILEDIR}
					cp ${I} ${BUILDDIR}/${PKGNAME}/binfiles/${FILEDIR}
					;;

				"regular file" )
					FILEDIR="$(dirname $I)"
					FILEDIR="${FILEDIR#${SEARCHDIRS}*}"
					M_MD5SUM="$(md5sum ${I}|cut -d' ' -f1)"
					echo "${I#${SEARCHDIRS}*}§${FILEPOSIX}§${FILEOWNER}§${FILEGROUP}§${M_MTIME}§${M_MD5SUM}" >> ${BUILDDIR}/${PKGNAME}/.files
					install -d ${BUILDDIR}/${PKGNAME}/binfiles/${FILEDIR}
					cp ${I} ${BUILDDIR}/${PKGNAME}/binfiles/${FILEDIR}
					;;
	
				"block special file")
					echo "${I#${SEARCHDIRS}*}§${FILEPOSIX}" >> ${BUILDDIR}/${PKGNAME}/.pipes
					;;

				"character special file")
					echo "${I#${SEARCHDIRS}*}§${FILEPOSIX}" >> ${BUILDDIR}/${PKGNAME}/.char
					;;
				
				*)
					echo "What I am ? -- $I"
					echo "$0 paused ... Press Enter"
					read
					;;
			esac
		fi
	done
	
	#very important: unsetting the '§' fieldseperator
	unset IFS
	
	#forcing mtime to same value
	echo -n "Forcing mtime to the same value ..."
	find ${BUILDDIR}/${PKGNAME}/binfiles \
		-exec touch -m -r ${BUILDDIR}/${PKGNAME}/.mtime '{}' ';' \
		&& echo done || echo false
	
}

build_rmtimestamp() {
	rm /var/tmp/timestamp
}


build_package() {
	echo "Building Package ..."
	cd ${BUILDDIR}
	tar cvjf ${PKGNAME}.tar.bz2 ./${PKGNAME}
	install -d ${PKGDIR}
	mv ${PKGNAME}.tar.bz2 ${PKGDIR}/${PKGNAME}.${PKGSUFFIX}
}


build_preinstall
build_postinstall
build_package