# Contributor: Rasmus Thomsen <oss@cogitri.dev>
# Contributor: Jakub Jirutka <jakub@jirutka.cz>
# Contributor: Shiz <hi@shiz.me>
# Contributor: Jeizsm <jeizsm@gmail.com>
# Maintainer: Rasmus Thomsen <oss@cogitri.dev>
pkgname=rust
pkgver=1.42.0
_llvmver=9
_bootver=1.41.1
pkgrel=0
pkgdesc="The Rust Programming Language"
url="https://www.rust-lang.org"
arch="x86_64 armv7 armhf aarch64 x86 ppc64le"
license="Apache-2.0 AND MIT"

# gcc is needed at runtime just for linking. Someday rustc might invoke
# the linker directly, and then we'll only need binutils.
# See: https://github.com/rust-lang/rust/issues/11937
depends="$pkgname-stdlib=$pkgver-r$pkgrel gcc musl-dev"

# * Rust is self-hosted, so you need rustc (and cargo) to build rustc...
#   The last revision of this abuild that does not depend on itself (uses
#   prebuilt rustc and cargo) is 2e6769eb39eaff3029d8298fc02856623c563cd8.
makedepends="
	cmake
	curl-dev
	file
	libgit2-dev
	openssl-dev
	llvm$_llvmver-dev
	llvm$_llvmver-test-utils
	python2
	tar
	zlib-dev
	coreutils
	rust-bootstrap=>$_bootver
	cargo-bootstrap
"

# XXX: This is a hack to allow this abuild to depend on itself. Adding "rust"
# to makedepends would not work, because abuild implicitly removes $pkgname
# and $subpackages from the abuild's dependencies.
provides="rust-bootstrap=$pkgver-r$pkgrel"
# This is needed for -src that contains some testing binaries.
# Disable tests for now, while we use foreign triplets
options="!archcheck !check"

subpackages="
	$pkgname-dbg
	$pkgname-stdlib
	$pkgname-analysis
	$pkgname-gdb::noarch
	$pkgname-lldb::noarch
	$pkgname-doc
	$pkgname-src::noarch
	cargo
	cargo-bash-completions:_cargo_bashcomp:noarch
	cargo-zsh-completion:_cargo_zshcomp:noarch
	cargo-doc:_cargo_doc:noarch
	"
source="https://static.rust-lang.org/dist/rustc-$pkgver-src.tar.gz
	musl-fix-static-linking.patch
	musl-fix-linux_musl_base.patch
	static-pie.patch
	need-rpath.patch
	need-ssp_nonshared.patch
	alpine-move-py-scripts-to-share.patch
	alpine-target.patch
	install-template-shebang.patch
	check-rustc
	link-musl-dynamically.patch
	musl-dont-use-crt-static.patch
	0006-Prefer-libgcc_eh-over-libunwind-for-musl.patch"
builddir="$srcdir/rustc-$pkgver-src"

# secfixes:
#   1.34.2-r0:
#     - CVE-2019-12083
#   1.26.0-r0:
#     - CVE-2019-16760

# We have to add new arches in multiple steps:
# 1. Compile with the upstream triplets, compiling alpine's triplets in
# 2. Compile again, now with our triplets selected as build/target, now that
#    rustc knows about them
case "$CARCH" in
	x86)
		_build="i686-unknown-linux-musl"
		_target="$_build"
		;;
	armv7)
		_build="armv7-unknown-linux-musleabihf"
		_target="$_build"
		;;
	armhf)
		_build="arm-unknown-linux-musleabihf"
		_target="$_build"
		;;
	ppc64le)
		_build="powerpc64le-unknown-linux-musl"
		_target="$_build"
		;;
	aarch64)
		_build="aarch64-unknown-linux-musl"
		_target="$_build"
		;;
	*)
		_build="$CBUILD"
		_target="$CTARGET"
esac

_rlibdir="usr/lib/rustlib/$_target/lib"
_sharedir="usr/share/rust"

ldpath="/$_rlibdir"

export RUST_BACKTRACE=1
# Don't use system libgit2 for now...
# https://github.com/rust-lang/rust/issues/63476
# Convince libgit2-sys to use the distro libgit2.
#export LIBGIT2_SYS_USE_PKG_CONFIG=1

# rust checksums files in vendor/, but we have to patch a few files...
_clear_vendor_checksums() {
	sed -i 's/\("files":{\)[^}]*/\1/' vendor/$1/.cargo-checksum.json
}

prepare() {
	default_prepare

	sed -i /LD_LIBRARY_PATH/d src/bootstrap/bootstrap.py

	# to dynamically link against musl
	_clear_vendor_checksums libc

	# Remove bundled dependencies.
	rm -Rf src/llvm-project/
}

build() {
	# Fails to compile libbacktrace-sys otherwise
	case "$CARCH" in
		x86)
			export CFLAGS="$CFLAGS -fno-stack-protector"
			;;
	esac

	./configure \
		--build="$_build" \
		--host="$_target" \
		--target="$_target" \
		--prefix="/usr" \
		--release-channel="stable" \
		--enable-local-rust \
		--local-rust-root="/usr" \
		--llvm-root="/usr/lib/llvm$_llvmver" \
		--disable-docs \
		--enable-extended \
		--tools="analysis,cargo,src" \
		--enable-llvm-link-shared \
		--enable-option-checking \
		--enable-locked-deps \
		--enable-vendor \
		--set="target.$_build.musl-root=/usr" \
		--set="target.$_build.crt-static=false"

	# Allow warnings instead of just aborting the build
	sed 's/#deny-warnings = .*/deny-warnings = false/' -i config.toml
	sed 's|deny(warnings,|deny(|' -i src/bootstrap/lib.rs

	./x.py build --jobs ${JOBS:-2}
}

check() {
	# At this moment lib/rustlib/$CTARGET/lib does not contain a complete
	# copy of the .so libs from lib (they will be copied there during
	# 'x.py install'). Thus we must set LD_LIBRARY_PATH for tests to work.
	# This is related to change-rpath-to-rustlib.patch.
	export LD_LIBRARY_PATH="$builddir/build/$CTARGET/stage2/lib"

	"$srcdir"/check-rustc "$builddir"/build/$CTARGET/stage2/bin/rustc

# XXX: There's some problem with these tests, we will figure it out later.
#	make check \
#		LD_LIBRARY_PATH="$_stage0dir/lib" \
#		VERBOSE=1

	msg "Running tests for cargo..."
	CFG_DISABLE_CROSS_TESTS=1 ./x.py test --no-fail-fast src/tools/cargo

	unset LD_LIBRARY_PATH
}

package() {
	DESTDIR="$pkgdir" ./x.py install -v

	cd "$pkgdir"

	# Python scripts are noarch, so move them to /usr/share.
	# Requires move-py-scripts-to-share.patch to be applied.
	_mv usr/lib/rustlib/etc/*.py $_sharedir/etc/
	rmdir -p usr/lib/rustlib/etc 2>/dev/null || true

	# Remove some clutter.
	cd usr/lib/rustlib
	rm components install.log manifest-* rust-installer-version uninstall.sh
}

stdlib() {
	pkgdesc="Standard library for Rust (static rlibs)"

	_mv "$pkgdir"/$_rlibdir/*.rlib "$subpkgdir"/$_rlibdir/
}

analysis() {
	pkgdesc="Compiler analysis data for the Rust standard library"
	depends="$pkgname-stdlib=$pkgver-r$pkgrel"

	_mv "$pkgdir"/$_rlibdir/../analysis "$subpkgdir"/${_rlibdir%/*}/
}

gdb() {
	pkgdesc="GDB pretty printers for Rust"
	depends="$pkgname gdb"

	mkdir -p "$subpkgdir"
	cd "$subpkgdir"

	_mv "$pkgdir"/usr/bin/rust-gdb usr/bin/
	_mv "$pkgdir"/$_sharedir/etc/gdb_*.py $_sharedir/etc/
}

lldb() {
	pkgdesc="LLDB pretty printers for Rust"
	depends="$pkgname lldb py2-lldb"

	mkdir -p "$subpkgdir"
	cd "$subpkgdir"

	_mv "$pkgdir"/usr/bin/rust-lldb usr/bin/
	_mv "$pkgdir"/$_sharedir/etc/lldb_*.py $_sharedir/etc/
}

src() {
	pkgdesc="$pkgdesc (source code)"
	depends="$pkgname"
	license="$license OFL-1.1 GPL-3.0-or-later GPL-3.0-with-GCC-exception CC-BY-SA-3.0 LGPL-3.0"

	_mv "$pkgdir"/usr/lib/rustlib/src/rust "$subpkgdir"/usr/src/
	rmdir -p "$pkgdir"/usr/lib/rustlib/src 2>/dev/null || true

	mkdir -p "$subpkgdir"/usr/lib/rustlib/src
	ln -s ../../../src/rust "$subpkgdir"/usr/lib/rustlib/src/rust
}

cargo() {
	pkgdesc="The Rust package manager"
	license="Apache-2.0 MIT UNLICENSE"
	depends="$pkgname"
	# XXX: See comment on top-level provides=.
	provides="cargo-bootstrap=$pkgver-r$pkgrel"

	_mv "$pkgdir"/usr/bin/cargo "$subpkgdir"/usr/bin/
}

_cargo_bashcomp() {
	pkgdesc="Bash completions for cargo"
	license="Apache-2.0 MIT"
	depends=""
	install_if="cargo=$pkgver-r$pkgrel bash-completion"

	cd "$pkgdir"
	_mv etc/bash_completion.d/cargo \
		"$subpkgdir"/usr/share/bash-completion/completions/
	rmdir -p etc/bash_completion.d 2>/dev/null || true
}

_cargo_zshcomp() {
	pkgdesc="ZSH completions for cargo"
	license="Apache-2.0 MIT"
	depends=""
	install_if="cargo=$pkgver-r$pkgrel zsh"

	cd "$pkgdir"
	_mv usr/share/zsh/site-functions/_cargo \
		"$subpkgdir"/usr/share/zsh/site-functions/_cargo
	rmdir -p usr/share/zsh/site-functions 2>/dev/null || true
}

_cargo_doc() {
	pkgdesc="The Rust package manager (documentation)"
	license="Apache-2.0 MIT"
	install_if="docs cargo=$pkgver-r$pkgrel"

	# XXX: This is hackish!
	cd "$pkgdir"/../$pkgname-doc
	_mv usr/share/man/man1/cargo* "$subpkgdir"/usr/share/man/man1/
}

_mv() {
	local dest; for dest; do true; done  # get last argument
	mkdir -p "$dest"
	mv "$@"
}

sha512sums="00359778ba886393e9792763ebd2754ee0b0db535a246ce9dcbbedd63b6eb414e321b552c88d4347ca355b8066492ef657aa3ceca2bcf00dfd80e1a92fac24b0  rustc-1.42.0-src.tar.gz
8d52048070e9a158810f5ef71eae07a3b107b60986375a593c3509f4c47f8e2f7fcdff8bc558c03c46127dbf66c4077dd7b5b422a83f2c49fb5d52ecfae5697e  musl-fix-static-linking.patch
41fd9e8a8dd99074d95d664e65f92dba644b8ef9fa37b9a1d781a01fe49eaa254c430f0f277622dc4f8203aad2d129a045fdf1679a0da526d549fac60654be26  musl-fix-linux_musl_base.patch
97e81c57af93df550577f41d795185a9eb0c37528776c250076cc57f06c87e81139eb71cd6b6a4730528511821ae50c304d7deb534d6422cd08bb44193ae605d  static-pie.patch
d4659b56dbf1218da98b995a0a89a8cfd069dd94b3e9aef4aee987484d96fc8b92f6d695ea4123eff26711961f2db2f7324bf5b4043f41722cd89581aac97f1c  need-rpath.patch
5bb8b60fee2540bfb3df0c0759d540eb5c29f861d8ed4640768fd8f5bc28fb781e2aafe37002dfc0fb0fc4c5c50be7e35981a0814b2a175368397463d0411910  need-ssp_nonshared.patch
35e0619672843d9dd41df4a086404a59b57c12fa014e42d06102bc3856a96ed021e716f9d581ec5c89444acbaedd3edcd2b8a85576df3bb4451c0edde3afbba5  alpine-move-py-scripts-to-share.patch
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c31fdfe8a9b3411576c75da46645cf0465b9053000a2ab49cf9b2f2733f679d6d33acbf236d67a20e14935d094a685453b7f1840180249f39d610fd0902c3125  check-rustc
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795194976763326c5e4a9eefc8b651b6d5fb533d2d000631ed48a92bafac90e9ca33b8d662e6c53ef109ea1a90c69def715d7d7154e3f9fb9035a58a313a7db3  musl-dont-use-crt-static.patch
9cb9542a13cc356b9f67be02cbe43cfd8d95c79fd561ed5ff5fe1741219e7571904046312be7ab3bda0944ce83bf10c5ddd3e32f19a16334ee445031128354da  0006-Prefer-libgcc_eh-over-libunwind-for-musl.patch"