#!/bin/bash
# meta generator

# metafile matrix

# Common infos -> meta
# ----------------------------
# lineno	description	example
# 01	PNAME		glibc-nptl
# 02	PCATEGORIE	sys-libs
# 03	PVER		2.5.0
# 04	PBUILD		7
# 05	STATE		unstable
# 06	DESCRIPTION	GNU libc6 (also called glibc2) C library with NPTL Threads.
# 07	HOMEPAGE	http://www.gnu.org/software/libc/libc.html
# 08	PKGTYPE		
# 09	SPLIT_PACKAGE_BASE
# 10	INHERITS	mtools
#
# # Arch specific -> ${arch}/desc
# ----------------------------
# lineno	description	example
# 1	MD5		7ba206976e312a456dc29cea4bb283ea
# 2	SIZE
# 3	MTIME		1187714117
#
# Dependencies
# ---------------------------------
# 	DEPEND   -> ${ARCH}/depend
# 	SDEPEND  -> ${ARCH}/sdepend
# 	PROVIDE  -> ${ARCH}/provide
#
# # Content
# ---------------------------------
# 	CHAR     -> ${ARCH}/char
# 	DIRS     -> ${ARCH}/dirs
# 	FILES    -> ${ARCH}/files
# 	PIPES    -> ${ARCH}/pipes
# 	SYMLINKS -> ${ARCH}/symlinks

# --extract -> extract info from given package
# no params given/smage2, it uses the current build environment


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

add2meta()
{
	local var="$1"
	local value="$2"

	echo "${var}=\"${value}\"" >> ${METAFILE}
}

## only for tests -> normally in /etc/rc.d/init.d/functions
COLRED="\033[1;6m\033[31m"
COLGREEN="\033[1;6m\033[32m"
COLYELLOW="\033[1;6m\033[33m"
COLBLUE="\033[1;6m\033[34m"
COLMAGENTA="\033[1;6m\033[35m"
COLWHITE="\033[1;6m\033[37m"
COLGRAY="\033[0;6m\033[37m"
COLBOLD="\033[1m"
COLDEFAULT="\033[0m"

# get mage environment
[ -f /etc/mage.rc.global ] && source /etc/mage.rc.global || die "/etc/mage.rc.global missing"
[ -f ${MAGERC} ] && source ${MAGERC} || die "Your ${MAGERC} is missing. Aborting."
[ -f ${MLIBDIR}/mage4.functions.sh ] && source ${MLIBDIR}/mage4.functions.sh || die "mage functions missing"
[ -f ${MLIBDIR}/smage2.functions.sh ] && source ${MLIBDIR}/smage2.functions.sh || die "mage functions missing"

# default variables
PKGTARBALL=""
SMAGEFILE=""
METADIR="${PKGDIR}/meta"
METASUFFIX="meta"
METAFILE=""

# very basic getops
for i in $*
do
	case $1 in
		--extract|-c) shift; PKGTARBALL="$1" ;;
	esac
#	shift
done

SMAGEFILE="$1"
[ -z ${SMAGEFILE} ] && die "No smage file given."
[ -e ${SMAGEFILE} ] || die "Smage file '${SMAGEFILE}' does not exist."

if [[ -n ${PKGTARBALL} ]]
then
	# abort if given file is not a pkg
	[[ ${PKGTARBALL##*.} != ${PKGSUFFIX} ]] && die "${PKGTARBALL} is not a valid pkg file."

	[[ ! -d ${SOURCEDIR} ]] && install -d ${SOURCEDIR}

	# unpack srctarball
	[[ ! -f ${PKGTARBALL} ]] && die "Error: ${PKGTARBALL} does not exist. Aborting."	

	# set correct SMAGENAME; use the one that the src_pkg provide
	# /path/to/SOURCEDIR/PNAME/SMAGENAME
	SMAGEFILE="${SOURCEDIR}/$(basename ${PKGTARBALL%-*-*})/$(basename ${PKGTARBALL} .${PKGSUFFIX}).${SMAGESUFFIX}"

	tar xvjf ${SRCPKGTARBALL} -C ${SOURCEDIR} || die  "Error unpackung src-tarball ${SRCPKGTARBALL}"
fi

# get generic package information from smage file
smagesource ${SMAGEFILE}

# set the right meta-location
[[ ! -d ${METADIR} ]] && install -d ${METADIR}
METAFILE="${METADIR}/${PNAME}-${PVER}-${ARCH}-${PBUILD}.${METASUFFIX}"

# create a clean metafile
:> ${METAFILE}

# basic packages information
add2meta PNAME "${PNAME}"
add2meta PCATEGORIE "${PCATEGORIE}"
add2meta PVER "${PVER}"
add2meta PBUILD "${PBUILD}"
#add2meta STATE "${STATE}"
add2meta DESCRIPTION "${DESCRIPTION}"
add2meta HOMEPAGE "${HOMEPAGE}"
add2meta PKGTYPE "${PKGTYPE}"
#add2meta SPLIT_PACKAGE_BASE "${SPLIT_PACKAGE_BASE}"
#add2meta INHERITS "${INHERITS}"

# arch specific
add2meta ARCH "${ARCH}"
add2meta SIZE "$(du -Ds ${BUILDDIR}/${PNAME}-${PVER}-${ARCH}-${PBUILD}/binfiles | sed 's/^\(.*\)\t.*/\1/')"
add2meta MTIME "$(< ${BUILDDIR}/${PNAME}-${PVER}-${ARCH}-${PBUILD}/.mtime)"

# provided binfiles
SEARCH_DIRS="bin,sbin,usr/bin,usr/sbin"
SEARCH_DIRS+=",usr/*/bin,usr/*/sbin"
SEARCH_DIRS+=",opt/bin,opt/*/bin,opt/*/sbin"
SEARCH_DIRS+=",opt/*/jre/bin"
# at last add braces
SEARCH_DIRS="{${SEARCH_DIRS}}"
# search them
add2meta PROVIDED_BINARIES "$(find $(eval echo ${BUILDDIR}/${PNAME}-${PVER}-${ARCH}-${PBUILD}/binfiles/${SEARCH_DIRS}) -type f -printf '%f ' 2> /dev/null)"

# generate MD5SUM (get it with tail -n1)
echo >> ${METAFILE}
echo '# MD5 CHECKSUM:' >> ${METAFILE}
( cd ${PKGDIR}; md5sum ${PNAME}-${PVER}-${ARCH}-${PBUILD}.${PKGSUFFIX} >> ${METAFILE} )