# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

# @ECLASS: gst-plugins10-multilib.eclass
# @MAINTAINER:
# gstreamer@gentoo.org
# @AUTHOR:
# Greg Turner <gmt@be-evil.net>
# @BLURB: Manages build for invididual ebuild for gst-plugins.
# @DESCRIPTION:
# Eclass to make external gst-plugins emergable on a per-plugin basis and
# to solve the problem with gst-plugins generating far too much unneeded
# dependancies.
#
# GStreamer consuming applications should depend on the specific plugins they
# need as defined in their source code.
#
# In case of spider usage, obtain recommended plugins to use from Gentoo
# developers responsible for gstreamer <gstreamer@gentoo.org> or the application
# developer.

___GST_PLUGINS10_MULTILIB_IN_USE=1

inherit eutils ehooker my-god-its-full-of-quotation-marks multilib \
	toolchain-funcs versionator gst-plugins10 multilib-build

# @ECLASS-VARIABLE: MULTILIB_INSECURE_INSTALL
# @DEFAULT-UNSET
# @DESCRIPTION:
# If set to a nonempty value, multilib-minimal_src_install will not perform
# automatic checking of headers for inter-ABI conflicts, nor will it automate
# wrapping of header files.  Instead, multilib_src_install pseudophases will
# run without any special protection and the MULTILIB_WRAPPED_HEADERS array
# will be ignored.
# See:
# @CODE@
# http://devmanual.gentoo.org/eclass-reference/multilib-build.eclass/index.html
# @CODE@
# (or the multilib-build.eclass source itself) for further information about this
# feature.

case "${EAPI:-0}" in
	4|5) :; ;;
	*) die "EAPI=\"${EAPI:-0}\" is not supported" ;;
esac

[[ ${___GST_PLUGINS_MULTILIB_IN_USE} ]] && \
	die "gst-plugins10-multilib is not compatible with gst-plugins-multilib"

EXPORT_FUNCTIONS src_prepare src_configure src_compile src_test src_install

RDEPEND="
	>=dev-libs/glib-2.6:2[${MULTILIB_USEDEP}]
	media-libs/gstreamer:${SLOT}[${MULTILIB_USEDEP}]
"
if [[ ${PN} != ${GST_ORG_MODULE} ]]; then
	# Do not run test phase for invididual plugin ebuilds.
	RESTRICT="test"
	RDEPEND="${RDEPEND} >=media-libs/${GST_ORG_MODULE}-${PV}:${SLOT}[${MULTILIB_USEDEP}]"
else
	IUSE="nls"
	DEPEND="${DEPEND} nls? ( >=sys-devel/gettext-0.17[${MULTILIB_USEDEP}] )"
fi

DEPEND="${DEPEND} ${RDEPEND}"

# @FUNCTION: gst-plugins10-multilib_find_plugin_dir
# @USAGE: gst-plugins10-multilib_find_plugin_dir [<build_dir>]
# @INTERNAL
# @DESCRIPTION:
# Finds plugin build directory and cd to it.
# Defaults to ${GST_PLUGINS_BUILD_DIR} if argument is not provided
# Overridden version of gst-plugins10 implementation for multilib compat.
gst-plugins10-multilib_find_plugin_dir() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"

	debug-print "${FUNCNAME}: BUILD_DIR=\"${BUILD_DIR}\""
	debug-print "${FUNCNAME}: S=\"${S}\""
	debug-print "${FUNCNAME}: PWD=\"$(pwd)\""

	local build_dir=${1:-${GST_PLUGINS_BUILD_DIR}}

	debug-print "${FUNCNAME}: about to search for plugin build_dir=\"${build_dir}\""

	local possible_dir
	for possible_dir in "${BUILD_DIR}/ext" "${BUILD_DIR}/sys" "${S}/ext" "${S}/sys" "$(pwd -L)/ext" "$(pwd -L)/sys" ; do
		debug-print "${FUNCNAME}: testing candidiate plugin dir \"${possible_dir}/${build_dir}\""
		if [[ -d "${possible_dir}/${build_dir}" ]] ; then
			debug-print "${FUNCNAME}: found \"${possible_dir}/${build_dir}\" directory -- we have a wiener!"
			if [[ ${possible_dir} == *ext ]] ; then
				einfo "Found external plugin directory \"${build_dir}\"."
			else
				einfo "Found system plugin directory \"${build_dir}\"."
			fi
			cd "${possible_dir}/${build_dir}"
			return 0
		else
			debug-print "${FUNCNAME}: \"${possible_dir}/${build_dir}\" DNE or not a directory..."
		fi
	done

	debug-print "${FUNCNAME}: no candidate directories contained the modules we were looking for.  Giving up the ghost."
	die "Can't find \"${build_dir}\" plugin dir; unable to proceed."
}

gst-plugins10_find_plugin_dir() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"
	debug-print "${FUNCNAME}: (override): redirecting to gst-plugins10-multilib_find_plugin_dir..."
	gst-plugins10-multilib_find_plugin_dir "$@"
}

# @FUNCTION: gst-plugins10-multilib_system_link
# @USAGE: gst-plugins10-multilib_system_link gst-libs/gst/audio:gstreamer-audio [...]
# @DESCRIPTION:
# Walks through makefiles in order to make sure build will link against system
# librairies.
# Takes a list of path fragments and corresponding pkgconfig libraries
# separated by colon (:). Will replace the path fragment by the output of
# pkgconfig.  Overridden version of gst-plugins10 implementation.
gst-plugins10-multilib_system_link() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"
	local directory libs pkgconfig pc tuple
	pkgconfig=${PKG_CONFIG:-$(tc-getPKG_CONFIG)}

	for plugin_dir in ${GST_PLUGINS_BUILD_DIR} ; do
		gst-plugins10-multilib_find_plugin_dir ${plugin_dir}

		for tuple in $@ ; do
			directory="$(echo ${tuple} | cut -f1 -d':')"
			pc="$(echo ${tuple} | cut -f2 -d':')-${SLOT}"
			libs="$(${pkgconfig} --libs-only-l ${pc})"
			sed -e "s:\$(top_builddir)/${directory}/.*\.la:${libs}:" \
				-i Makefile.am Makefile.in || die
		done
	done
}

gst-plugins10_system_link() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"
	debug-print "${FUNCNAME}: (overridE): redirecting to gst-plugins10-multilib_system_link..."
	gst-plugins10-multilib_system_link "$@"
}

_gst-plugins10-multilib_wrap_prepare() {
	debug-print-function ${FUNCNAME} "$@"
	einfo "Preparing sources for ABI ${ABI} ..."
	declare -a prepare_args=( "${prepare_args[@]}" )
	ehook_fire gst-plugins10-multilib-per-abi-pre_src_prepare && \
		default_src_prepare
	ehook_fire gst-plugins10-multilib-per-abi-post_src_prepare -u
}

# @FUNCTION: gst-plugins10-multilib_src_prepare
# @DESCRIPTION:
# Clones the sources for in-tree building due to
# unsafe prepare hacks in gst-plugins10 eclass
gst-plugins10-multilib_src_prepare() {
	debug-print-function ${FUNCNAME} "$@"
	declare -a prepare_args=( "$@" )
	if ehook_fire gst-plugins10-multilib-global-pre_src_prepare ; then
		multilib_copy_sources
		multilib_parallel_foreach_abi multilib-build_run_in_build_dir \
			_gst-plugins10-multilib_wrap_prepare 
	fi
	ehook_fire gst-plugins10-multilib-global-post_src_prepare -u
}

_gst-plugins10-multilib_wrap_configure() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"
	einfo "Configuring for ABI ${ABI} ..."
	declare -a configure_args=( "${configure_args[@]}" )
	ehook_fire gst-plugins10-multilib-per-abi-pre_src_configure && \
		gst-plugins10_src_configure "${configure_args[@]}"
	ehook_fire gst-plugins10-multilib-per-abi-post_src_configure -u
}

# @FUNCTION: gst-plugins10-multilib_src_configure
# @DESCRIPTION:
# Handles logic common to configuring gstreamer plugins
gst-plugins10-multilib_src_configure() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"
	declare -a configure_args=( "$@" )
	ehook_fire gst-plugins10-multilib-global-pre_src_configure && \
		multilib_parallel_foreach_abi multilib-build_run_in_build_dir \
		_gst-plugins10-multilib_wrap_configure 
	ehook_fire gst-plugins10-multilib-global-post_src_configure -u
}

_gst-plugins10-multilib_wrap_compile() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"
	einfo "Compiling ABI ${ABI}"
	declare -a compile_args=( "${compile_args[@]}" )
	ehook_fire gst-plugins10-multilib-per-abi-pre_src_compile && \
		gst-plugins10_src_compile "${compile_args[@]}"
	ehook_fire gst-plugins10-multilib-per-abi-post_src_compile -u
}

# @FUNCTION: gst-plugins10-multilib_src_compile
# @DESCRIPTION:
# Compiles requested gstreamer plugin.
gst-plugins10-multilib_src_compile() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"
	declare -a compile_args=( "$@" )
	ehook_fire gst-plugins10-multilib-global-pre_src_compile && \
		multilib_foreach_abi multilib-build_run_in_build_dir \
		_gst-plugins10-multilib_wrap_compile 
	ehook_fire gst-plugins10-multilib-global-post_src_compile -u
}

_gst-plugins10-multilib_wrap_test() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"
	einfo "Compiling ABI ${ABI}"
	declare -a test_args=( "${test_args[@]}" )
	ehook_fire gst-plugins10-multilib-per-abi-pre_src_test && \
		default_src_test "${test_args[@]}"
	ehook_fire gst-plugins10-multilib-per-abi-post_src_test -u
}

# @FUNCTION: gst-plugins10-multilib_src_test
# @DESCRIPTION:
# Compiles requested gstreamer plugin.
gst-plugins10-multilib_src_test() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"
	declare -a test_args=( "$@" )
	ehook_fire gst-plugins10-multilib-global-pre_src_test && \
		multilib_foreach_abi multilib-build_run_in_build_dir \
		_gst-plugins10-multilib_wrap_test 
	ehook_fire gst-plugins10-multilib-global-post_src_test -u
}

_gst-plugins10-multilib_wrap_install() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"
	einfo "Compiling ABI ${ABI}"
	declare -a install_args=( "${install_args[@]}" )
	ehook_fire gst-plugins10-multilib-per-abi-pre_src_install && \
		gst-plugins10_src_install "${install_args[@]}"
	# Do multilib magic only when >1 ABI is used and
	# MULTILIB_INSECURE_INSTALL is not set
	if [[ ${#MULTIBUILD_VARIANTS[@]} -gt 1 && \
		 -z ${MULTILIB_INSECURE_INSTALL} ]]; then
		multilib_prepare_wrappers
		multilib_check_headers
	fi
	ehook_fire gst-plugins10-multilib-per-abi-post_src_install -u
}

# @FUNCTION: gst-plugins10_src_install
# @DESCRIPTION:
# Installs requested gstreamer plugin.
gst-plugins10-multilib_src_install() {
	debug-print-function ${FUNCNAME} "$(mg-qm "$@")"
	declare -a install_args=( "$@" )
	if ehook_fire gst-plugins10-multilib-global-pre_src_install ; then
		multilib_foreach_abi multilib-build_run_in_build_dir \
			_gst-plugins10-multilib_wrap_install 
	fi
	[[ ${MULTILIB_INSECURE_INSTALL} ]] || multilib_install_wrappers
	ehook_fire gst-plugins10-multilib-global-post_src_install -u
}