app-emulation/looking-glass: A low latency KVMFR application for guests with VGA PCI Passthrough

app-emulation/looking-glass/Manifest

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+DIST looking-glass-0_beta6.tar.gz 2774858 BLAKE2B 351d7805447552d9945ae9a4e24cb853eda8f5bbff32d882355aa634ad67912881830dd36e5c48b1796b2f26f83f6db061004bfb6af4dfbc7704162190629efe SHA512 558981d6b32098076ef0775a748da349941551352cbef836e37310e43e5cd6072df3dec6fa2418a9abecc7729ef0c1c6869e3168d05a3d76bea46c6eb8c4e82c

app-emulation/looking-glass/files/looking-glass-tmpfiles.conf

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+f /dev/shm/looking-glass 0660 qemu qemu -

app-emulation/looking-glass/looking-glass-0_beta6.ebuild

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+# Copyright 2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake tmpfiles linux-info
+
+MY_PV="${PV//0_beta/B}"
+
+DESCRIPTION="A low latency KVMFR application for guests with VGA PCI Passthrough"
+HOMEPAGE="https://looking-glass.io"
+SRC_URI="https://looking-glass.io/artifact/${MY_PV}/source -> ${PN}-${PV}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="X wayland pipewire pulseaudio +backtrace gnome host obs"
+REQUIRED_USE="|| ( X wayland )
+	|| ( pipewire pulseaudio )"
+
+DEPEND="gui-libs/egl-wayland
+	media-libs/fontconfig
+	media-libs/libsamplerate
+	dev-libs/nettle[gmp]
+	app-emulation/spice-protocol
+	X? (
+		x11-libs/libX11
+		x11-libs/libXfixes
+		x11-libs/libXi
+		x11-libs/libXScrnSaver
+		x11-libs/libXpresent
+	)
+	wayland? (
+		dev-libs/wayland
+		x11-libs/libxkbcommon
+		gnome? (
+			gui-libs/libdecor
+		)
+	)
+	pipewire? (
+		media-video/pipewire
+	)
+	pulseaudio? (
+		media-sound/pulseaudio
+	)
+	obs? (
+		media-video/obs-studio
+	)"
+RDEPEND="${DEPEND}"
+BDEPEND=""
+
+S="${WORKDIR}/${PN}-${MY_PV}"
+
+MY_CMAKE_PROJECT="client "
+
+src_prepare() {
+	default
+	# add other project
+	if use host; then
+		MY_CMAKE_PROJECT+="host "
+	fi
+	if use obs; then
+		MY_CMAKE_PROJECT+="obs "
+	fi
+	# cmake prepare loop
+	for prj in ${MY_CMAKE_PROJECT}
+	do
+		CMAKE_USE_DIR="${S}/${prj}"
+		cmake_src_prepare "$@"
+	done
+}
+
+src_configure() {
+	# cmake configure by use flags
+	if ! use X; then
+		local mycmakeargs+=(
+			-DENABLE_X11=no
+		)
+	fi
+	if ! use wayland; then
+		local mycmakeargs+=(
+			-DENABLE_WAYLAND=no
+		)
+	fi
+	if ! use pipewire; then
+		local mycmakeargs+=(
+			-DENABLE_PIPEWIRE=no
+		)
+	fi
+	if ! use pulseaudio; then
+		local mycmakeargs+=(
+			-DENABLE_PULSEAUDIO=no
+		)
+	fi
+	if use gnome && use wayland; then
+		local mycmakeargs+=(
+			-DENABLE_LIBDECOR=yes
+		)
+	fi
+	# cmake configure loop
+	for prj in ${MY_CMAKE_PROJECT}
+	do
+		CMAKE_USE_DIR="${S}/${prj}"
+		BUILD_DIR="${CMAKE_USE_DIR}_build"
+		cmake_src_configure "$@"
+	done
+	set_arch_to_kernel
+}
+
+src_compile() {
+	# cmake compile loop
+	for prj in ${MY_CMAKE_PROJECT}
+	do
+		CMAKE_USE_DIR="${S}/${prj}"
+		BUILD_DIR="${CMAKE_USE_DIR}_build"
+		cmake_src_compile "$@"
+	done
+}
+
+src_install() {
+	# install cmake projects
+	for prj in ${MY_CMAKE_PROJECT}
+	do
+		CMAKE_USE_DIR="${S}/${prj}"
+		BUILD_DIR="${CMAKE_USE_DIR}_build"
+		cmake_src_install "$@"
+	done
+	# install docs
+	einstalldocs
+	# install tmpfiles config
+	newtmpfiles "${FILESDIR}"/${PN}-tmpfiles.conf ${PN}.conf
+}

app-emulation/looking-glass/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<upstream>
+		<remote-id type="github">gnif/LookingGlass</remote-id>
+	</upstream>
+	<maintainer type="person">
+		<email>OriPoin@outlook.com</email>
+	<name>Yachen Wang</name>
+	</maintainer>
+	<use>
+		<flag name="backtrace">Enable backtrace support</flag>
+		<flag name="host">Build host application</flag>
+		<flag name="obs">Build OBS plugin</flag>
+		<flag name="pipewire">Build with PipeWire support</flag>
+	</use>
+</pkgmetadata>