Gentoo Packages

# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

# Keep an eye on Fedora's packaging (https://src.fedoraproject.org/rpms/libcap-ng/tree/rawhide) for patches
# Same maintainer in Fedora as upstream
PYTHON_COMPAT=( python3_{12..14} )
inherit autotools dot-a flag-o-matic linux-info out-of-source-utils python-r1 shell-completion

DESCRIPTION="POSIX 1003.1e capabilities"
HOMEPAGE="https://people.redhat.com/sgrubb/libcap-ng/"
SRC_URI="https://github.com/stevegrubb/libcap-ng/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"

LICENSE="GPL-2+ LGPL-2.1+"
SLOT="0"
KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
IUSE="bpf deprecated python static-libs"
REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"

RDEPEND="
	bpf? (
		dev-libs/libbpf:=
		sys-process/audit
	)
	python? ( ${PYTHON_DEPS} )
"
DEPEND="
	${RDEPEND}
	sys-kernel/linux-headers
	bpf? ( dev-util/bpftool )
"
BDEPEND="
	bpf? (
		llvm-core/clang[llvm_targets_BPF(-)]
		virtual/pkgconfig
	)
	python? ( >=dev-lang/swig-2 )
"

pkg_pretend() {
	# bug 972898
	if use bpf && [[ ${MERGE_TYPE} != binary ]] ; then
		if [[ ! -f /sys/kernel/btf/vmlinux ]] ; then
			local err="Cannot read /sys/kernel/btf/vmlinux, which is required by bpftool.\n"
			err+="  Typically this means that your kernel is missing the DEBUG_INFO_BTF option,\n"
			err+="  without which BPF cannot work. Please build with USE=-bpf or reconfigure your kernel."
			die "${err}"
		fi

		# check required kernel flags as documented at:
		# https://github.com/stevegrubb/libcap-ng/blob/master/README.md
		local CONFIG_CHECK="
			~BPF
			~BPF_SYSCALL
			~BPF_EVENTS
			~DEBUG_INFO_BTF
			~FTRACE_SYSCALLS
			~KPROBES
			~KRETPROBES
			~KPROBE_EVENTS
			~PERF_EVENTS
			~STACKTRACE
			~TRACEPOINTS
			~TRACING
		"

		linux-info_pkg_setup
	fi
}

src_prepare() {
	default

	eautoreconf
}

src_configure() {
	use sparc && replace-flags -O? -O0

	# bug #960469
	use static-libs && lto-guarantee-fat

	local ECONF_SOURCE="${S}"

	local myconf=(
		$(use_enable bpf cap-audit)
		$(use_enable deprecated)
		$(use_enable static-libs static)
		--with-capability_header="${ESYSROOT}"/usr/include/linux/capability.h
	)

	local pythonconf=(
		--without-python3
	)

	# Set up python bindings build(s)
	if use python ; then
		setup_python_flags_configure() {
			pythonconf=(
				--with-python3
			)

			run_in_build_dir econf "${pythonconf[@]}" "${myconf[@]}"
		}

		python_foreach_impl setup_python_flags_configure
	else
		local BUILD_DIR="${WORKDIR}"/build
		run_in_build_dir econf "${pythonconf[@]}" "${myconf[@]}"
	fi
}

src_compile() {
	if use python ; then
		python_foreach_impl run_in_build_dir emake
	else
		local BUILD_DIR="${WORKDIR}"/build
		emake -C "${BUILD_DIR}"
	fi
}

src_test() {
	if [[ "${EUID}" -eq 0 ]] ; then
		ewarn "Skipping tests due to root permissions."
		return
	fi

	if use python ; then
		python_foreach_impl run_in_build_dir emake check
	else
		local BUILD_DIR="${WORKDIR}"/build
		emake -C "${BUILD_DIR}" check
	fi
}

src_install() {
	if use python ; then
		python_foreach_impl run_in_build_dir emake DESTDIR="${D}" install
	else
		local BUILD_DIR="${WORKDIR}"/build
		emake -C "${BUILD_DIR}" DESTDIR="${D}" install
	fi

	# bug #960469
	use static-libs && strip-lto-bytecode

	find "${ED}" -name '*.la' -delete || die

	# Fixup completions, bug 972536
	mv "${D}$(get_bashcompdir)"/{libcap-ng.bash_completion,cap-audit} || die
	bashcomp_alias cap-audit filecap netcap pscap
}