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# Copyright 2024-2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
LLVM_COMPAT=( {16..20} )
RUST_MIN_VER="1.82.0"
inherit eapi9-ver llvm-r2 linux-info cargo rust-toolchain toolchain-funcs meson
DESCRIPTION="sched_ext schedulers and tools"
HOMEPAGE="https://github.com/sched-ext/scx"
SRC_URI="
https://github.com/sched-ext/scx/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz
${CARGO_CRATE_URIS}
"
if [[ ${PKGBUMPING} != ${PVR} ]]; then
SRC_URI+="
https://github.com/gentoo-crate-dist/scx/releases/download/v${PV}/scx-${PV}-crates.tar.xz
"
fi
LICENSE="GPL-2"
# Dependent crate licenses
LICENSE+="
Apache-2.0 BSD-2 BSD CC0-1.0 ISC MIT MPL-2.0 Unicode-3.0 ZLIB
"
SLOT="0"
KEYWORDS="amd64"
IUSE="systemd"
DEPEND="
virtual/libelf:=
sys-libs/libseccomp
virtual/zlib:=
>=dev-libs/libbpf-1.6:=
"
RDEPEND="
${DEPEND}
"
BDEPEND="
app-misc/jq
dev-libs/protobuf[protoc(+)]
>=dev-util/bpftool-7.5.0
$(llvm_gen_dep '
llvm-core/clang:${LLVM_SLOT}=[llvm_targets_BPF(-)]
')
"
CONFIG_CHECK="
~BPF
~BPF_EVENTS
~BPF_JIT
~BPF_SYSCALL
~DEBUG_INFO_BTF
~FTRACE
~SCHED_CLASS_EXT
"
QA_PREBUILT="
/usr/bin/scx_loader
/usr/bin/vmlinux_docify
/usr/bin/scxctl
"
pkg_setup() {
linux-info_pkg_setup
llvm-r2_pkg_setup
rust_pkg_setup
}
src_prepare() {
default
if tc-is-cross-compiler; then
# Inject the rust_abi value into install_rust_user_scheds
sed -i "s;\${MESON_BUILD_ROOT};\${MESON_BUILD_ROOT}/$(rust_abi);" \
meson-scripts/install_rust_user_scheds || die
fi
}
src_configure() {
BUILD_DIR="${BUILD_DIR:-${WORKDIR}/${P}-build}"
local emesonargs=(
-Dbpf_clang="$(get_llvm_prefix)/bin/clang"
-Dbpftool=disabled
-Dlibbpf_a=disabled
-Dcargo="${EPREFIX}/usr/bin/cargo"
-Dcargo_home="${ECARGO_HOME}"
-Doffline=true
-Denable_rust=true
-Dopenrc=disabled
$(meson_feature systemd)
)
cargo_env meson_src_configure
}
src_compile() {
cargo_env meson_src_compile
}
src_test() {
cargo_env meson_src_test
}
src_install() {
cargo_env meson_src_install
dodoc README.md
local readme readme_name
for readme in scheds/{rust,c}/*/README.md ./rust/*/README.md; do
[[ -e ${readme} ]] || continue
readme_name="${readme#*/rust/}"
readme_name="${readme_name#*/c/}"
readme_name="${readme_name%/README.md}"
newdoc "${readme}" "${readme_name}.md"
done
newinitd services/openrc/scx.initrd scx
insinto /etc/default
doins services/scx
dosym ../default/scx /etc/conf.d/scx
newinitd "${FILESDIR}/scx_loader.initd" scx_loader
insinto /etc/scx_loader/
newins services/scx_loader.toml config.toml
}
pkg_postinst() {
if ver_replacing -lt 1.0.16; then
ewarn "Starting in 1.0.16, the scx service is being replaced with scx_loader."
ewarn "To transition to the new service, first edit"
ewarn "${EPREFIX}/etc/scx_loader/config.toml with your preferred"
ewarn "configuration, then disable the legacy scx service and enable the new"
ewarn "scx_loader service:"
ewarn
ewarn "For openrc users:"
ewarn " rc-service scx stop"
ewarn " rc-update del scx default"
ewarn " rc-service scx_loader start"
ewarn " rc-update add scx_loader default"
ewarn
ewarn "For systemd users:"
ewarn " systemctl disable --now scx"
ewarn " systemctl enable --now scx_loader"
ewarn
ewarn "For more info, see:"
ewarn "https://wiki.cachyos.org/configuration/sched-ext/#transitioning-from-scxservice-to-scx_loader-a-comprehensive-guide"
fi
}
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