# Copyright 2004-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

PYTHON_COMPAT=( python3_{8..10} )
# NEED_BOOTSTRAP is for developers to quickly generate a tarball
# for publishing to the tree.
NEED_BOOTSTRAP="no"
inherit multibuild python-any-r1 multilib-minimal

DESCRIPTION="Extended crypt library for descrypt, md5crypt, bcrypt, and others"
HOMEPAGE="https://github.com/besser82/libxcrypt"
if [[ ${NEED_BOOTSTRAP} == "yes" ]] ; then
	inherit autotools
	SRC_URI="https://github.com/besser82/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
else
	SRC_URI="https://dev.gentoo.org/~sam/distfiles/${CATEGORY}/${PN}/${P}-autotools.tar.xz"
fi

LICENSE="LGPL-2.1+ public-domain BSD BSD-2"
SLOT="0/1"
KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
IUSE="+compat split-usr +static-libs system test"
REQUIRED_USE="split-usr? ( system )"
RESTRICT="!test? ( test )"

DEPEND="system? (
		elibc_glibc? (
			sys-libs/glibc[-crypt(+)]
			!sys-libs/glibc[crypt(+)]
		)
		!sys-libs/musl
	)
"
RDEPEND="${DEPEND}"
BDEPEND="dev-lang/perl
	sys-apps/findutils
	test? ( $(python_gen_any_dep 'dev-python/passlib[${PYTHON_USEDEP}]') )"

python_check_deps() {
	has_version -b "dev-python/passlib[${PYTHON_USEDEP}]"
}

pkg_setup() {
	MULTIBUILD_VARIANTS=(
		$(usex compat 'xcrypt_compat' '')
		xcrypt_nocompat
	)

	use test && python-any-r1_pkg_setup
}

src_prepare() {
	default

	# WARNING: Please read on bumping or applying patches!
	#
	# There are two circular dependencies to be aware of:
	# 1)
	#	if we're bootstrapping configure and makefiles:
	#		libxcrypt -> automake -> perl -> libxcrypt
	#
	#   mitigation:
	#		toolchain@ manually runs `make dist` after running autoconf + `./configure`
	#		and the ebuild uses that.
	#		(Don't include the pre-generated Perl artefacts.)
	#
	#	solution for future:
	#		Upstream are working on producing `make dist` tarballs.
	#		https://github.com/besser82/libxcrypt/issues/134#issuecomment-871833573
	#
	# 2)
	#	configure *unconditionally* needs Perl at build time to generate
	#	a list of enabled algorithms based on the set passed to `configure`:
	#		libxcrypt -> perl -> libxcrypt
	#
	#	mitigation:
	#		None at the moment.
	#
	#	solution for future:
	#		Not possible right now. Upstream intend on depending on Perl for further
	#		configuration options.
	#		https://github.com/besser82/libxcrypt/issues/134#issuecomment-871833573
	#
	# Therefore, on changes (inc. bumps):
	#	* You must check whether upstream have started providing tarballs with bootstrapped
	#	  auto{conf,make};
	#
	#	* diff the build system changes!
	#
	if [[ ${NEED_BOOTSTRAP} == "yes" ]] ; then
		# Facilitate our split variant build for compat + non-compat
		eapply "${FILESDIR}"/${PN}-4.4.19-multibuild.patch
		eautoreconf
	fi
}

src_configure() {
	multibuild_foreach_variant multilib-minimal_src_configure
}

get_xclibdir() {
	printf -- "%s/%s/%s\n" \
		"$(usex split-usr '' '/usr')" \
		"$(get_libdir)" \
		"$(usex system '' 'xcrypt')"
}

multilib_src_configure() {
	local -a myconf=(
		--disable-werror
		--libdir="${EPREFIX}"$(get_xclibdir)
		--with-pkgconfigdir="${EPREFIX}/usr/$(get_libdir)/pkgconfig"
		--includedir="${EPREFIX}/usr/include/$(usex system '' 'xcrypt')"
	)

	case "${MULTIBUILD_ID}" in
		xcrypt_compat-*)
			myconf+=(
				--disable-static
				--disable-xcrypt-compat-files
				--enable-obsolete-api=yes
			)
			;;
		xcrypt_nocompat-*)
			myconf+=(
				--enable-obsolete-api=no
				$(use_enable static-libs static)
			)
		;;
		*) die "Unexpected MULTIBUILD_ID: ${MULTIBUILD_ID}";;
	esac

	ECONF_SOURCE="${S}" econf "${myconf[@]}"
}

src_compile() {
	multibuild_foreach_variant multilib-minimal_src_compile
}

multilib_src_test() {
	emake check
}

src_test() {
	multibuild_foreach_variant multilib-minimal_src_test
}

src_install() {
	multibuild_foreach_variant multilib-minimal_src_install

	(
		shopt -s failglob || die "failglob failed"

		# Make sure our man pages do not collide with glibc or man-pages.
		for manpage in "${ED}"/usr/share/man/man3/crypt{,_r}.?*; do
			mv -n "${manpage}" "$(dirname "${manpage}")/xcrypt_$(basename "${manpage}")" \
				|| die "mv failed"
		done
	) || die "failglob error"

	# Remove useless stuff from installation
	find "${ED}"/usr/share/doc/${PF} -type l -delete || die
	find "${ED}" -name '*.la' -delete || die
}

multilib_src_install() {
	emake DESTDIR="${D}" install

	# Don't install the libcrypt.so symlink for the "compat" version
	case "${MULTIBUILD_ID}" in
		xcrypt_compat-*)
			rm "${ED}"$(get_xclibdir)/libcrypt$(get_libname) \
				|| die "failed to remove extra compat libraries"
		;;
		xcrypt_nocompat-*)
			if use split-usr; then
				(
					if use static-libs; then
						# .a files are installed to /$(get_libdir) by default
						# Move static libraries to /usr prefix or portage will abort
						shopt -s nullglob || die "failglob failed"
						static_libs=( "${ED}"/$(get_xclibdir)/*.a )

						if [[ -n ${static_libs[*]} ]]; then
							dodir "/usr/$(get_xclibdir)"
							mv "${static_libs[@]}" "${ED}/usr/$(get_xclibdir)" \
								|| die "Moving static libs failed"
						fi
					fi

					if use system; then
						# Move versionless .so symlinks from /$(get_libdir) to /usr/$(get_libdir)
						# to allow linker to correctly find shared libraries.
						shopt -s failglob || die "failglob failed"

						for lib_file in "${ED}"$(get_xclibdir)/*$(get_libname); do
							lib_file_basename="$(basename "${lib_file}")"
							lib_file_target="$(basename "$(readlink -f "${lib_file}")")"
							dosym "../../$(get_libdir)/${lib_file_target}" "/usr/$(get_xclibdir)/${lib_file_basename}"
						done

						rm "${ED}"$(get_xclibdir)/*$(get_libname) || die "Removing symlinks in incorrect location failed"
					fi
				)
			fi
		;;
		*) die "Unexpected MULTIBUILD_ID: ${MULTIBUILD_ID}";;
	esac
}