# $Id$

# default includes
sminclude mtools

# some sane default values
: ${PCATEGORIE="dev-haskell"}
: ${DESCRIPTION="${PNAME}"}
: ${HOMEPAGE="http://hackage.haskell.org/package/${PNAME/#haskell-/}"}

# some sane default dependencies
SDEPEND="${SDEPEND}
	>= dev-lang/ghc-6.12"

# default SRCFILE SRCDIR and SRC_URI
: ${SRCFILE="${PNAME/#haskell-/}-${PVER}.tar.gz"}
: ${SRCDIR="${BUILDDIR}/${PNAME/#haskell-/}-${PVER}"}
SRC_URI=(
	${SRC_URI[*]}
	http://hackage.haskell.org/packages/archive/${PNAME/#haskell-/}/${PVER}/${SRCFILE}
	mirror://${PNAME}/${SRCFILE}
)

# possible features which are supported atm
HASKELL_POSSIBLE_FEATURES="split-objs shared register haddock"
# default haskell features
HASKELL_FEATURES="split-objs shared register"

HASKELL_PNAME="${PNAME}"
SPECIAL_VARS="${SPECIAL_VARS} HASKELL_PNAME"
SPECIAL_FUNCTIONS="${SPECIAL_FUNCTIONS} haskell_preinstall haskell_postinstall haskell_preremove haskell_postremove"

haskell_feature()
{
	local search="$1"
	local feature
	for feature in ${HASKELL_FEATURES}
	do
		# feature was found
		[[ ${search} = ${feature} ]] && return 0
	done

	# feature was *not* found
	return 1
}

haskell_feature_is_supported()
{
	local search="$1"
	local feature
	for feature in ${HASKELL_POSSIBLE_FEATURES}
	do
		# feature was found
		[[ ${search} = ${feature} ]] && return 0
	done

	# feature was *not* found
	return 1
}

haskell_disable_feature()
{
	local feature="$1"
	haskell_feature_is_supported "${feature}" || die "haskell feature '${feature}' not supported!"
	echo -e "${COLBLUE}--- ${COLRED}disabled haskell feature '${feature}'${COLDEFAULT}"
	export HASKELL_FEATURES="${HASKELL_FEATURES/${feature}/}"
}

haskell_enable_feature()
{
	local feature="$1"
	haskell_feature_is_supported "${feature}" || die "haskell feature '${feature}' not supported!"
	echo -e "${COLBLUE}+++ ${COLGREEN}enabled haskell feature '${feature}'${COLDEFAULT}"
	export HASKELL_FEATURES+=" ${feature}"
}

haskell_ghc_version()
{
	local ver
	ver=$(ghc --numeric-version)
	echo "${ver}"
}

haskell_ghc_setup_script()
{
	local setup
	if [[ -e Setup.lhs ]]
	then
		setup="Setup.lhs"
	elif [[ -e Setup.hs ]]
	then
		setup="Setup.hs"
	else
		die "unkown setup script"
	fi

	echo "${setup}"
}

haskell_install_register()
{
	runhaskell $(haskell_ghc_setup_script) register --gen-script || die
	runhaskell $(haskell_ghc_setup_script) unregister --gen-script || die

	minstalldir /usr/share/haskell/${PNAME} || die
	minstallexec register.sh /usr/share/haskell/${PNAME} || die
	minstallexec unregister.sh /usr/share/haskell/${PNAME} || die
}

haskell_src_prepare()
{
	munpack ${SRCFILE} || die
}

haskell_src_configure()
{
	local configure_opts="$@"

	haskell_feature split-objs && configure_opts+=" --enable-split-objs"
	haskell_feature shared && configure_opts+=" --enable-shared"

	runhaskell $(haskell_ghc_setup_script) configure \
		--ghc \
		--prefix=/usr \
		--libdir=/usr/$(mlibdir) \
		--libsubdir=ghc-$(haskell_ghc_version)/${PNAME/#haskell-/}-${PVER} \
		--datadir=/usr/share \
		--datasubdir=ghc-$(haskell_ghc_version)/${PNAME/#haskell-/}-${PVER} \
		${configure_opts} \
		|| die
}

haskell_src_build()
{
	runhaskell $(haskell_ghc_setup_script) build || die
}

haskell_src_compile()
{
	cd ${SRCDIR}
	haskell_src_configure || die
	haskell_src_build || die
}

haskell_src_install()
{
	cd ${SRCDIR}
	runhaskell $(haskell_ghc_setup_script) copy --destdir=${BINDIR} || die

	# create register scripts
	haskell_feature register && haskell_install_register || die

	# install docs
	local i
	for i in ABOUT-NLS AUTHORS BUGS CHANGES ChangeLog COPYING \
		FAQ LICENSE NEWS README TODO prologue.txt
	do
		if [ -f ${SRCDIR}/${i} ]
		then
			minstalldocs ${i} || die
		fi
	done
}

haskell_preinstall()
{
	if [[ -x ${MROOT}/usr/share/haskell/${HASKELL_PNAME}/unregister.sh ]]
	then
		echo "unregister haskell module ${HASKELL_PNAME} ..."
		${MROOT}/usr/share/haskell/${HASKELL_PNAME}/unregister.sh
	fi
}

haskell_postinstall()
{
	if [[ -x ${MROOT}/usr/share/haskell/${HASKELL_PNAME}/register.sh ]]
	then
		echo "register haskell module ${HASKELL_PNAME} ..."
		${MROOT}/usr/share/haskell/${HASKELL_PNAME}/register.sh
	fi
}

# haskell_preremove()
# {
# 	if [[ -x ${MROOT}/usr/share/haskell/${HASKELL_PNAME}/unregister.sh ]]
# 	then
# 		echo "unregister haskell module ${HASKELL_PNAME} ..."
# 		${MROOT}/usr/share/haskell/${HASKELL_PNAME}/unregister.sh
# 	fi
# }

# to be on the safe side, fix all broken packages afer a package remove
haskell_postremove()
{
	if [[ -x $(which ghc-pkg) ]]
	then
		local broken="$(ghc-pkg check --simple-output)"
		if [[ ! -z ${broken} ]]
		then
			echo "fixing broken haskell modules:"
			local pkg
			for pkg in ${broken}
			do
				echo "   unregister ${pkg} ..."
				ghc-pkg unregister ${pkg}
			done
		fi
	fi
}

export_inherits haskell src_prepare src_compile src_install preinstall postinstall postremove #preremove