dev-lang/zig: sync 9999 with 0.13.0-r2

* Update to use zig-utils and zig eclasses instead of local
  get_zig_mcpu etc. functions.
* "stage3" compilation is unified by combining build.zig options,
  now both cmake (+llvm) and bootstrap.c (-llvm) build up to "zig2"
  target, after that we use zig.eclass with common options.
* Before migrating to the zig.eclass, test steps in src_test
  have been ran sequentially in for-loop, which allowed logic inside
  each step to ran parallelly but not several steps at a time. Now we
  use upstream "test" step instead of separately calling all dependant
  steps, so that build system can now ran all of them paralelly.
  This means time spent in `src_test` is now significantly shorter.
* "zig2" in both scenarios now has explicit target which is set by
  using zig-utils.eclass functions on a CBUILD/CHOST. This allows us
  to skip convertion logic in CMake and bootstrap.c, so that instead
  of patching them we can just update converter in zig-utils.eclass
  and unify target behaviour.
* Disable autodocs generation for "std" module, since it can now
  be generated on-fly with `zig std` command.

Signed-off-by: Eric Joldasov <bratishkaerik@landless-city.net>
Signed-off-by: Sam James <sam@gentoo.org>

1 files changed, 121 insertions, 114 deletions

diff --git a/dev-lang/zig/zig-9999.ebuild b/dev-lang/zig/zig-9999.ebuild
index 858ec3be9405..4f0358a96629 100644
--- a/dev-lang/zig/zig-9999.ebuild
+++ b/dev-lang/zig/zig-9999.ebuild
@@ -6,10 +6,13 @@ EAPI=8
 LLVM_COMPAT=( 19 )
 LLVM_OPTIONAL=1
 
-inherit check-reqs cmake edo llvm-r1 toolchain-funcs
+ZIG_SLOT="$(ver_cut 1-2)"
+ZIG_OPTIONAL=1
+
+inherit check-reqs cmake flag-o-matic edo llvm-r1 toolchain-funcs zig
 
 DESCRIPTION="A robust, optimal, and maintainable programming language"
-HOMEPAGE="https://ziglang.org/"
+HOMEPAGE="https://ziglang.org/ https://github.com/ziglang/zig/"
 if [[ ${PV} == 9999 ]]; then
 	EGIT_REPO_URI="https://github.com/ziglang/zig.git"
 	inherit git-r3
@@ -39,14 +42,15 @@ fi
 # lib/libc/mingw: ZPL public-domain BSD-2 ISC HPND
 # lib/libc/glibc: BSD HPND ISC inner-net LGPL-2.1+
 LICENSE="MIT Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT ) || ( Apache-2.0-with-LLVM-exceptions Apache-2.0 MIT BSD-2 ) public-domain BSD-2 ZPL ISC HPND BSD inner-net LGPL-2.1+"
-SLOT="$(ver_cut 1-2)"
+SLOT="${ZIG_SLOT}"
 IUSE="doc +llvm"
 REQUIRED_USE="
 	!llvm? ( !doc )
 	llvm? ( ${LLVM_REQUIRED_USE} )
 "
 
-BUILD_DIR="${S}/build"
+# Used by both "cmake" and "zig" eclasses.
+BUILD_DIR="${WORKDIR}/${P}_build"
 
 # Zig requires zstd and zlib compression support in LLVM, if using LLVM backend.
 # (non-LLVM backends don't require these)
@@ -62,173 +66,176 @@ DEPEND="
 		')
 	)
 "
-
-RDEPEND="
+BDEPEND+="
 	${DEPEND}
 "
-
+RDEPEND="${DEPEND}"
 IDEPEND="app-eselect/eselect-zig"
 
-# see https://github.com/ziglang/zig/issues/3382
-# For now, Zig Build System doesn't support enviromental CFLAGS/LDFLAGS/etc.
-QA_FLAGS_IGNORED="usr/.*/zig/${PV}/bin/zig"
+DOCS=( "README.md" "doc/build.zig.zon.md" )
 
-RESTRICT="!llvm? ( test )"
+# zig.eclass does not set this for us since we use ZIG_OPTIONAL=1
+QA_FLAGS_IGNORED="usr/.*/zig/${PV}/bin/zig"
 
 # Since commit https://github.com/ziglang/zig/commit/e7d28344fa3ee81d6ad7ca5ce1f83d50d8502118
 # Zig uses self-hosted compiler only
 CHECKREQS_MEMORY="4G"
 
-ctarget_to_zigtarget() {
-	# Zig's Target Format: arch-os-abi
-	local CTARGET="${CTARGET:-${CHOST}}"
-
-	local ZIG_ARCH
-	case "${CTARGET%%-*}" in
-		i?86)		ZIG_ARCH=x86;;
-		sparcv9)	ZIG_ARCH=sparc64;;
-		*)		ZIG_ARCH="${CTARGET%%-*}";; # Same as in CHOST
-	esac
-
-	local ZIG_OS
-	case "${CTARGET}" in
-		*linux*)	ZIG_OS=linux;;
-		*apple*)	ZIG_OS=macos;;
-	esac
-
-	local ZIG_ABI
-	case "${CTARGET##*-}" in
-		gnu)		ZIG_ABI=gnu;;
-		solaris*)	ZIG_OS=solaris ZIG_ABI=none;;
-		darwin*)	ZIG_ABI=none;;
-		*)		ZIG_ABI="${CTARGET##*-}";; # Same as in CHOST
-	esac
-
-	echo "${ZIG_ARCH}-${ZIG_OS}-${ZIG_ABI}"
-}
+pkg_setup() {
+	# Skip detecting zig executable.
+	ZIG_EXE="not-applicable" ZIG_VER="${PV}" zig_pkg_setup
 
-get_zig_mcpu() {
-	local ZIG_DEFAULT_MCPU=native
-	tc-is-cross-compiler && ZIG_DEFAULT_MCPU=baseline
-	echo "${ZIG_MCPU:-${ZIG_DEFAULT_MCPU}}"
-}
+	export ZIG_SYS_INSTALL_DEST="${EPREFIX}/usr/$(get_libdir)/zig/${PV}"
+
+	if use llvm; then
+		tc-is-cross-compiler && die "USE=llvm is not yet supported when cross-compiling"
+		llvm-r1_pkg_setup
+	fi
 
-get_zig_target() {
-	local ZIG_DEFAULT_TARGET=native
-	tc-is-cross-compiler && ZIG_DEFAULT_TARGET="$(ctarget_to_zigtarget)"
-	echo "${ZIG_TARGET:-${ZIG_DEFAULT_TARGET}}"
+	check-reqs_pkg_setup
 }
 
-pkg_setup() {
-	# Useful for debugging and a little bit more deterministic.
-	export ZIG_LOCAL_CACHE_DIR="${T}/zig-local-cache"
-	export ZIG_GLOBAL_CACHE_DIR="${T}/zig-global-cache"
+src_unpack() {
+	if [[ ${PV} == 9999 ]]; then
+		git-r3_src_unpack
+	else
+		if use verify-sig; then
+			verify-sig_verify_detached "${DISTDIR}"/${P}.tar.xz{,.minisig}
+		fi
+	fi
+	zig_src_unpack
+}
 
-	export ZIG_SYS_INSTALL_DEST="${EPREFIX}/usr/$(get_libdir)/zig/${PV}"
+src_prepare() {
+	if use llvm; then
+		cmake_src_prepare
+	else
+		# Sync with zig_src_prepare
+		default_src_prepare
+		mkdir -p "${BUILD_DIR}" || die
+		einfo "BUILD_DIR: \"${BUILD_DIR}\""
+		# "--system" mode is not used during bootstrap.
+	fi
 
-	use llvm && llvm-r1_pkg_setup
-	check-reqs_pkg_setup
+	# Remove "limit memory usage" flags, it's already verified by
+	# CHECKREQS_MEMORY and causes unneccessary errors. Upstream set them
+	# according to CI OOM failures, which are not applicable to normal Gentoo build.
+	sed -i -e '/\.max_rss = .*,/d' build.zig || die
 }
 
 src_configure() {
-	if ! use llvm; then
-		mkdir -p "${BUILD_DIR}/stage3" || die
-		# Currently, Zig without LLVM extensions lacks most optimizations.
-		export ZIG_BOOTSTRAP_STAGE3_FLAGS=(
-			-Dtarget="$(get_zig_target)"
-			-Dcpu="$(get_zig_mcpu)"
-			-Doptimize=Debug
-			-Dstd-docs=false
-			-Dno-langref
+	# Has no effect on final binary and only causes failures during bootstrapping.
+	filter-lto
+
+	# Used during bootstrapping. stage1/stage2 have limited functionality
+	# and can't resolve native target, so we pass target in exact form.
+	declare -r -g ZIG_HOST_AS_TARGET="$(zig-utils_c_env_to_zig_target "${CBUILD:-${CHOST}}" "${CFLAGS}"})"
+
+	# Note that if we are building with CMake, "my_zbs_args"
+	# are used only after compiling zig2.
+	local my_zbs_args=(
+		--zig-lib-dir "${S}/lib/"
+		# Will be a subdir under ZIG_SYS_INSTALL_DEST.
+		--prefix-lib-dir lib/
+
+		# These are built separately
+		-Dno-langref
+		-Dstd-docs=false
+
+		--release=fast
+	)
+	if use llvm; then
+		my_zbs_args+=(
+			-Denable-llvm=true
+			-Dstatic-llvm=false
+			-Dconfig_h="${BUILD_DIR}/config.h"
+		)
+	else
+		my_zbs_args+=(
 			-Denable-llvm=false
-			-Dforce-link-libc
 		)
-		return
 	fi
 
-	local mycmakeargs=(
-		-DZIG_USE_CCACHE=OFF
-		-DZIG_SHARED_LLVM=ON
-		-DZIG_TARGET_TRIPLE="$(get_zig_target)"
-		-DZIG_TARGET_MCPU="$(get_zig_mcpu)"
-		-DZIG_USE_LLVM_CONFIG=ON
-		-DCMAKE_PREFIX_PATH="$(get_llvm_prefix)"
-		-DCMAKE_INSTALL_PREFIX="${ZIG_SYS_INSTALL_DEST}"
-	)
+	zig_src_configure
+
+	if use llvm; then
+		# Build for native only, it's for zig2 (build-time executable)
+		# LLVM from BDEPEND
+		local mycmakeargs=(
+			-DZIG_SHARED_LLVM=ON
+			-DZIG_USE_LLVM_CONFIG=ON
 
-	cmake_src_configure
+			-DZIG_TARGET_TRIPLE=native
+			-DZIG_TARGET_MCPU=native
+			-DZIG_HOST_TARGET_TRIPLE="${ZIG_HOST_AS_TARGET}"
+
+			-DCMAKE_PREFIX_PATH="$(get_llvm_prefix -b)"
+			-DCMAKE_INSTALL_PREFIX="${ZIG_SYS_INSTALL_DEST}"
+		)
+
+		cmake_src_configure
+	fi
 }
 
 src_compile() {
-	# Remove "limit memory usage" flags, it's already verified by
-	# CHECKREQS_MEMORY and causes unneccessary errors. Upstream set them
-	# according to CI OOM failures, which are higher than during Gentoo build.
-	sed -i -e '/\.max_rss = .*,/d' build.zig || die
+	if use llvm; then
+		cmake_build zig2
+	else
+		cd "${BUILD_DIR}" || die
+		ln -s "${S}/stage1/" . || die
+		ln -s "${S}/src/" . || die
+		ln -s "${S}/lib/" . || die
 
-	if ! use llvm; then
-		$(tc-getCC) -o bootstrap bootstrap.c || die "Zig's bootstrap.c compilation failed"
-		edob ./bootstrap
-		edo ./zig2 build install --prefix "${BUILD_DIR}/stage3/" "${ZIG_BOOTSTRAP_STAGE3_FLAGS[@]}"
-		return
+		local native_cc="$(tc-getBUILD_CC)"
+		"${native_cc}" -o bootstrap "${S}/bootstrap.c" || die "Zig's bootstrap.c compilation failed"
+		ZIG_HOST_TARGET_TRIPLE="${ZIG_HOST_AS_TARGET}" CC="${native_cc}" edo ./bootstrap
 	fi
 
-	cmake_src_compile
+	cd "${BUILD_DIR}" || die
+	ZIG_EXE="./zig2" zig_src_compile --prefix "${BUILD_DIR}/stage3/"
 
-	"${BUILD_DIR}/stage3/bin/zig" env || die "Zig compilation failed"
+	./stage3/bin/zig env || die "Zig compilation failed"
 
 	if use doc; then
-		cd "${BUILD_DIR}" || die
-		edo ./stage3/bin/zig build std-docs --zig-lib-dir "${BUILD_DIR}/stage3/lib/zig/" --prefix "${S}/docgen/"
-		edo ./stage3/bin/zig build langref --zig-lib-dir "${BUILD_DIR}/stage3/lib/zig/" --prefix "${S}/docgen/"
+		ZIG_EXE="./stage3/bin/zig" zig_src_compile langref --prefix "${S}/docgen/"
 	fi
 }
 
 src_test() {
 	cd "${BUILD_DIR}" || die
-	local ZIG_TEST_ARGS="-Dstatic-llvm=false -Denable-llvm -Dskip-non-native \
-		-Doptimize=ReleaseSafe -Dtarget=$(get_zig_target) -Dcpu=$(get_zig_mcpu)"
-	local ZIG_TEST_STEPS=(
-		test-fmt test-cases test-behavior test-c-import test-compiler-rt test-universal-libc test-compare-output
-		test-standalone test-c-abi test-link test-stack-traces test-cli test-asm-link test-translate-c
-		test-run-translated-c test-std
-	)
-
-	local step
-	for step in "${ZIG_TEST_STEPS[@]}" ; do
-		edob ./stage3/bin/zig build ${step} ${ZIG_TEST_ARGS}
-	done
+	ZIG_EXE="./stage3/bin/zig" zig_src_test -Dskip-non-native
 }
 
 src_install() {
-	local DOCS=( "README.md" "doc/build.zig.zon.md" )
-	use doc && local HTML_DOCS=( "docgen/doc/langref.html" "docgen/doc/std" )
+	use doc && local HTML_DOCS=( "docgen/doc/langref.html" )
 
-	if ! use llvm; then
-		DESTDIR="${D}" edo ./zig2 build install --prefix "${ZIG_SYS_INSTALL_DEST}" "${ZIG_BOOTSTRAP_STAGE3_FLAGS[@]}"
-		einstalldocs
-	else
-		cmake_src_install
-	fi
+	ZIG_EXE="./zig2" zig_src_install --prefix "${ZIG_SYS_INSTALL_DEST}"
 
-	cd "${ED}/usr/$(get_libdir)/zig/${PV}/" || die
+	cd "${D}/${ZIG_SYS_INSTALL_DEST}" || die
 	mv lib/zig/ lib2/ || die
 	rm -rf lib/ || die
 	mv lib2/ lib/ || die
-	dosym -r "/usr/$(get_libdir)/zig/${PV}/bin/zig" "/usr/bin/zig-${PV}"
+	dosym -r "${ZIG_SYS_INSTALL_DEST}/bin/zig" /usr/bin/zig-${PV}
 }
 
 pkg_postinst() {
-	eselect zig update ifunset
+	eselect zig update ifunset || die
+
+	elog "Starting from 0.12.0, Zig no longer installs"
+	elog "precompiled standard library documentation."
+	elog "Instead, you can call \`zig std\` to compile it on-the-fly."
+	elog "It reflects all edits in standard library automatically."
+	elog "See \`zig std --help\` for more information."
+	elog "More details here: https://ziglang.org/download/0.12.0/release-notes.html#Redesign-How-Autodoc-Works"
 
 	if ! use llvm; then
 		elog "Currently, Zig built without LLVM support lacks some"
 		elog "important features such as most optimizations, @cImport, etc."
 		elog "They are listed under \"Building from Source without LLVM\""
 		elog "section of the README file from \"/usr/share/doc/${PF}\" ."
-		elog "It's recommended to use C backend directly with this stage2 build."
 	fi
 }
 
 pkg_postrm() {
-	eselect zig update ifunset
+	eselect zig update ifunset || die
 }