# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/dvb.eclass,v 1.16 2005/06/16 09:44:33 zzam Exp $
#
# Matthias Schwarzott <zzam@gmx.de>
#
# Changelog
#
# 17.08.2004	Path to driver can be set in /etc/make.conf (DVB_DRIVER_INCLUDE) MS
# 18.08.2004	Detect if Kernel 2.6.7 or greater and set Path magically MS
# 19.08.2004	Detect Path to header-files automatic MS
# 20.08.2004	Added more files to check for __user MS
# 21.08.2004	Added more pathes to check for dvb-driver MS
# 24.09.2004	Better tests for need to patch driver / cosmetic changes MS
# 21.01.2005	Changed grep for API-Version MS
# 18.04.2005	Search for includes in pkg_setup (like linux-info.eclass) MS
# 16.05.2005	make vdr_opts less verbose MS
#

ECLASS=dvb
INHERITED="$INHERITED $ECLASS"
EXPORT_FUNCTIONS pkg_setup


test -z ${DVB_TEST_API_VERSION} || DVB_TEST_API_VERSION=1

# No dependency for linux26-headers

#if [ "${KV:0:3}" == "2.6" ]; then
#	KV_patch=$(echo ${KV} | cut -f 3 -d . | cut -f 1 -d -)
#
#	if [ "${KV_patch}" -gt 7 ]; then
#		DEPEND="sys-kernel/linux26-headers"
#	fi
#fi

#
# function to implement a "local" use variable called VDR_OPTS
#
vdr_opts() {
	local x
	for x in ${VDR_OPTS}
	do
		if [ "${x}" = "${1}" ]
		then
			#einfo "Option ${1} found in VDR_OPTS"
			return 0
		fi
	done
	#ewarn "No optional ${1} in VDR_OPTS"
	#echo
	return 1
}

# best be called from pkg_setup

dvb_find_driver_include() {
	# Only continue if first call
	test -z "${DVB_DRIVER_INCLUDE_DONE}" || return

	local local_path="${DVB_DRIVER_INCLUDE}"
	local versfile
	local found=0

	# Search for driver-headers in any of these locations
	for DVB_DRIVER_INCLUDE in ${local_path} /usr/include/linuxtv-dvb-cvs/ /usr/include/linuxtv-dvb/ /usr/include/ /usr/src/linux/include/; do

		local versfile="${DVB_DRIVER_INCLUDE}/linux/dvb/version.h"
		test -f "${versfile}" || continue

		# Read Version of DVB-API
		DVB_API_VERSION=$(cat ${versfile} | awk '/DVB_API_VERSION / { print $3 }')
		DVB_API_VERSION_MINOR=$(cat ${versfile} | awk '/DVB_API_VERSION_MINOR/ { print $3 }')
		[ "$DVB_TEST_API_VERSION" == "1" ] && [ "${DVB_API_VERSION}" -ne "3" ] && continue

		found=1
		break
	done

	# No accaptable headers found
	if [ "$found" == "0" ]; then
		ewarn "No Header for the DVB-Driver found!"
		einfo
		einfo "You need to install either"
		einfo " + >=linuxtv-dvb-cvs-0.0.2"
		einfo " + a Kernel with DVB-Support (2.6.x)"
		einfo " + linux26-headers"
		die
	fi

	local version_txt=${DVB_API_VERSION}
	test -z ${DVB_API_VERSION_MINOR} || version_txt=${version_txt}.${DVB_API_VERSION_MINOR}
	einfo "Found DVB-Driver Includes:"
	einfo "    ${DVB_DRIVER_INCLUDE} (API ${version_txt})"

	# Test if headers need to be patched
	pushd . >/dev/null
	cd ${DVB_DRIVER_INCLUDE}
	dvb_check_user_patch
	popd >/dev/null

	DVB_DRIVER_INCLUDE_DONE="1"
}

dvb_check_user_patch() {
	# Testing Headers for __user without included linux/compiler.h

	local headers="linux/dvb/*.h"

	grep -q __user ${headers} || return
	if grep -q linux/compiler.h ${headers}; then
		# This is good (no need to patch)
		# if compiler.h has apropriate define (it has in >=linux26-headers-2.6.8.1)
		if grep -q __user /usr/include/linux/compiler.h; then
			return
		fi
	fi

	# Only get here if headers need to be patched
	einfo "Workaround for older kernel-headers or strange driver-snapshot"
	mkdir -p ${T}/dvb-includes/linux/dvb

	local f
	for f in ${headers}; do
		sed -e 's:__user::' < ${f} > ${T}/dvb-includes/${f}
	done
	DVB_DRIVER_INCLUDE=${T}/dvb-includes
}

dvb_patch_makefile() {
	# dvb_find_driver_include already called from pkg_setup

	test -z "$SILENT" && einfo Patching Makefile for new path to dvb-driver

	local f="${1}"
	test -z "${f}" && f="${S}/Makefile"

	sed -i ${f} \
		-e "s:^DVBDIR.*$:DVBDIR = ${DVB_DRIVER_INCLUDE}:" \
		-e 's:\$(DVBDIR)/include:$(DVBDIR):'
}

dvb_patch_all_makefiles() {
	einfo "Patching Makefiles for new path to dvb-driver"
	local f
	for f in $(find -name Makefile); do
		SILENT=1 dvb_patch_makefile "${f}"
	done
}

dvb_pkg_setup() {
	dvb_find_driver_include
}