# Copyright 1999-2016 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

# TODOs:
#  - figure out exact kernel version required to build the module without errors
#  - test if it works nonetheless
#  - warn/abort if wrong kernel version
#    - inheriting linux-info breaks installation?!
#  - fix QA notice about installing symlinks in /usr/lib

EAPI=5

inherit linux-mod
#inherit linux-info

DESCRIPTION="Desktop Video - drivers and tools for products by Blackmagic Design including DeckLink and Intensity"
HOMEPAGE="http://www.blackmagicdesign.com/"
HOMEPAGE_DOWNLOAD_NAME="Desktop Video ${PV} Update"

SRC_URI="Blackmagic_Desktop_Video_Linux_${PV}.tar"
UNPACKED_DIR="desktopvideo-10.6.6a10-x86_64"

LICENSE="BlackmagicDesktopVideo"
SLOT="0"
KEYWORDS="~amd64"
IUSE="autostart"
RESTRICT="fetch"

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

# supress QA warnings about stripping etc., i.e. stuff we cannot change since we install prebuilt binaries
QA_PREBUILT="opt/blackmagic-desktop-video/usr/bin/* opt/blackmagic-desktop-video/usr/lib/*"

# for kernel module compilation
MODULE_NAMES="blackmagic(misc:${S}/usr/src/blackmagic-10.6.6a10:${S}/usr/src/blackmagic-10.6.6a10) blackmagic-io(misc:${S}/usr/src/blackmagic-io-10.6.6a10:${S}/usr/src/blackmagic-io-10.6.6a10)"
BUILD_TARGETS="clean all"

pkg_nofetch() {
	einfo "Please visit ${HOMEPAGE} and download \"${HOMEPAGE_DOWNLOAD_NAME}\""
	einfo "for your product from the support section and move it to ${DISTDIR}"
	einfo ""
	einfo "  expected filename: ${SRC_URI}"
	einfo ""
	einfo "The license should be shown and has to be accepted before the download"
	einfo "starts."
}

#pkg_pretend() {
#	if kernel_is -ge 4 6 ; then
#		#      12345678901234567890123456789012345678901234567890123456789012345678901234567890
#		ewarn "Your kernel version seems to be unsupported; please consider downgrading to 3.16"
#		ewarn "if modules don't work."
#	fi
#}

src_unpack() {
	unpack ${A}
	
	cd ${WORKDIR}
	tar xfz Blackmagic_Desktop_Video_Linux_${PV}/other/x86_64/desktopvideo-10.6.6a10-x86_64.tar.gz
	
	# symlink to what is supposed to have been prepared
	ln -s ${UNPACKED_DIR} ${P}
}

#src_prepare() {
#	epatch "${FILESDIR}/9-8-strict-prototypes.patch"
#}

src_compile() {
	# library/tools are binary but kernel module requires compilation
	linux-mod_src_compile
}

src_install() {
	# all pre-built binaries should go into /opt and be symlinked to usr/bin etc.
	installdir="${D}/opt/blackmagic-desktop-video"
	
	mkdir -p ${installdir}
	cp -a ${WORKDIR}/${UNPACKED_DIR}/* ${installdir}/
	
	# there should a blank directory in /etc according to the archive...
	mkdir -p ${installdir}/etc/blackmagic
	chmod 755 ${installdir}/etc/blackmagic
	
	# NOTE: Not linking usr/lib/systemd as I don't use that and thus can't test it...
	symlinks=(
			'etc/init.d/DesktopVideoHelper'
			'usr/bin/BlackmagicDesktopVideoUtility'
			'usr/bin/BlackmagicFirmwareUpdater'
			'usr/bin/BlackmagicFirmwareUpdaterGui'
			'usr/lib/libDeckLinkAPI.so'
			'usr/lib/libDeckLinkPreviewAPI.so'
			'usr/lib/blackmagic'
			'usr/sbin/DesktopVideoHelper'
			'usr/share/applications/BlackmagicDesktopVideoUtility.desktop'
			'usr/share/applications/BlackmagicFirmwareUpdaterGui.desktop'
			'usr/share/doc/desktopvideo'
			'usr/share/doc/desktopvideo-gui'
			'usr/share/icons/hicolor/16x16/apps/BlackmagicDesktopVideoUtility.png'
			'usr/share/icons/hicolor/16x16/apps/BlackmagicFirmwareUpdaterGui.png'
			'usr/share/icons/hicolor/32x32/apps/BlackmagicDesktopVideoUtility.png'
			'usr/share/icons/hicolor/32x32/apps/BlackmagicFirmwareUpdaterGui.png'
			'usr/share/icons/hicolor/48x48/apps/BlackmagicDesktopVideoUtility.png'
			'usr/share/icons/hicolor/48x48/apps/BlackmagicFirmwareUpdaterGui.png'
			'usr/share/icons/hicolor/128x128/apps/BlackmagicDesktopVideoUtility.png'
			'usr/share/icons/hicolor/128x128/apps/BlackmagicFirmwareUpdaterGui.png'
			'usr/share/icons/hicolor/256x256/apps/BlackmagicDesktopVideoUtility.png'
			'usr/share/icons/hicolor/256x256/apps/BlackmagicFirmwareUpdaterGui.png'
                 )
	
	for path in "${symlinks[@]}"; do
		dosym /opt/blackmagic-desktop-video/${path} ${path}
	done
	
	# don't symlink man-pages, install a copy instead
	doman usr/share/man/man1/*.1
	
	# udev rule should be placed in /lib/udev/rules.d instead
	dosym /opt/blackmagic-desktop-video/etc/udev/rules.d/55-blackmagic.rules /lib/udev/rules.d/55-blackmagic.rules
	
	# add firmware check to autostart?
	if use autostart; then
		dosym /opt/blackmagic-desktop-video/etc/xdg/autostart/BlackmagicFirmwareUpdaterGuiAutoStart.desktop /etc/xdg/autostart/BlackmagicFirmwareUpdaterGuiAutoStart.desktop
	fi
	
	# kernel module
	linux-mod_src_install
}

pkg_postinst() {
	# kernel module
	linux-mod_pkg_postinst
	
	#      12345678901234567890123456789012345678901234567890123456789012345678901234567890
	einfo ""
	#einfo "Please do *NOT* report any QA errors to Gentoo or Blackmagic!"
	#einfo ""
	einfo "The kernel module to load is simply called blackmagic, but there's also"
	einfo "blackmagic-io. When upgrading, please rmmod both first. Then modprobe blackmagic"
	einfo "to see if it works (it should print your devices to kernel log)."
	einfo ""
	einfo "Installed tools are BlackmagicFirmwareUpdater, BlackmagicFirmwareUpdaterGui and"
	einfo "BlackmagicDesktopVideoUtility (former BlackmagicControlPanel)."
	einfo ""
	if use autostart; then
		einfo "Automated update check has been installed."
	else
		einfo "Automated update check has *not* been installed this time. (set USE flag"
		einfo "autostart if you want that)"
	fi
	einfo ""
	einfo "If your product is not being recognized, there are two common reasons:"
	einfo ""
	einfo " 1) You may need to increase the vmalloc limit in your kernel."
	einfo "    This can be done by adding e.g. vmalloc=256M to your kernel boot line. You"
	einfo "    can see current usage by running"
	einfo ""
	einfo "    # grep VmallocUsed /proc/meminfo"
	einfo ""
	einfo " 2) Your firmware may be outdated. Make sure you reload the modules (or simply"
	einfo "    reboot) and then run BlackmagicFirmwareUpdater or, if you prefer,"
	einfo "    BlackmagicFirmwareUpdaterGui"
	einfo ""
	einfo "We are reloading udev rules now..."
	/bin/udevadm control --reload-rules || einfo " ... failed, you may want to check this before rebooting!"
}

pkg_postrm() {
	# kernel module
	linux-mod_pkg_postrm
}