# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

# Original Author: mavriq@gmail.com

inherit savedconfig

EXPORT_FUNCTIONS src_configure src_install

IUSE="nohighmem highmem4g highmem64g"

REQUIRED_USE="x86? (
		nohighmem? ( !highmem4g !highmem64g )
		highmem4g? ( !nohighmem !highmem64g )
		highmem64g? ( !nohighmem !highmem4g )
	)
	!x86? ( !nohighmem !highmem4g !highmem64g )
"

kernel_config_option() {
	config="${S}/.config"
	origkey="$1"
	key=`echo "$1"| tr 'a-z' 'A-Z'`
	value="$2"
	case "${value}" in
		'') use "${origkey}" \
			&& kernel_config_option "${key}" y \
			|| kernel_config_option "${key}" n
			return 0 ;;
		n)
			einfo "In ${config} disagle CONFIG_${key}"
			sed -i -e "s:CONFIG_${key}=.:# CONFIG_${key} is not set:g" "${config}" ;;
		*)
			einfo "In ${config} set CONFIG_${key}=${value}"
			sed -i -e "s:.*\<CONFIG_${key}\>.*set:CONFIG_${key}=${value}:g" "${config}" ;;
	##	^^--- y or m or any value (задел на будущее)
	esac
}

calculate-kernel-tuneconfig_src_configure() {
	export KERNEL_ORIG_CONFIGNAME=$(cl-kernel -v --filter 'cl_kernel_config$' | sed -nr 's/.*\[.\]\s//p')
	if ! use savedconfig ; then
		cp ${KERNEL_ORIG_CONFIGNAME} .config
		return
	fi
	restore_config ".config"
	if [ ! -f ".config" ]; then
		ewarn "Could not locate user configfile, so we will use ${KERNEL_ORIG_CONFIGNAME}"
		cp -v "${KERNEL_ORIG_CONFIGNAME}" .config
	fi

	## Correct highmem parameter if need
	if use nohighmem || use highmem4g || use highmem64g; then
		ebegin "Correct highmem parameter"
		kernel_config_option nohighmem
		kernel_config_option highmem4g
		kernel_config_option highmem64g
		( use nohighmem || use highmem64g ) && kernel_config_option X86_PAE y
		eend 0
	else
		einfo "Don't touch highmem parameter"
	fi
	yes ''| emake -j1 oldconfig &>make_oldconfig.log
	#yes ''| make -j1 oldconfig &>make_oldconfig.log
	if [ "$?" -ne 0 ] ; then
		cat make_oldconfig.log
		die "Error during make oldconfig"
	fi
	diff -su ${KERNEL_ORIG_CONFIGNAME} .config >"${PF}:${SLOT}.diff"
}

calculate-kernel-tuneconfig_src_install() {
	use savedconfig || return
	save_config ${S}/.config
	insinto /etc/portage/savedconfig/${CATEGORY}
	doins "${PF}:${SLOT}.diff"
}