# Contributor: Jakub Jirutka <jakub@jirutka.cz>
# Maintainer: Jakub Jirutka <jakub@jirutka.cz>
pkgname=rust
pkgver=1.10.0
pkgrel=1
pkgdesc="The Rust Programming Language (compiler)"
url="http://www.rust-lang.org"
arch="x86_64"
license="ASL-2.0 BSD MIT"
depends="$pkgname-stdlib"
# libffi-dev is needed just because we compile llvm3.7 with LLVM_ENABLE_FFI.
makedepends="cmake file libffi-dev llvm3.7 llvm3.7-dev llvm3.7-static
	musl-dev python2 tar zlib-dev"
subpackages="$pkgname-stdlib $pkgname-gdb $pkgname-lldb $pkgname-doc"

# XXX: Rust is self-hosted, so you need rustc to build rustc... The problem is
# that Rust doesn't provide prebuilt rustc for musl yet. Thus I cross-compiled
# rustc on glibc-based system and uploaded the built tarballs to my server.
# We're gonna replace them once Rust start providing prebuilt binaries for musl.
# Follow https://github.com/rust-lang/rust/issues/31322.
# TODO: Implement some support for verifying crates fetched by cargo!
source="https://static.rust-lang.org/dist/rustc-$pkgver-src.tar.gz
	https://alpine.geeknet.cz/distfiles/rustc-$pkgver-x86_64-unknown-linux-musl.tar.gz
	https://alpine.geeknet.cz/distfiles/rust-std-$pkgver-x86_64-unknown-linux-musl.tar.gz
	https://alpine.geeknet.cz/distfiles/cargo-0.11.0-nightly-x86_64-alpine-linux-musl.tar.gz

	dont-require-filecheck.patch
	link-musl-dynamically.patch
	llvm-with-ffi.patch
	move-py-scripts-to-share.patch
	"
options="!strip"
builddir="$srcdir/rustc-$pkgver"

_sharedir="usr/share/rust"
_stage0dir="$srcdir/stage0"
_CTARGET="$CARCH-unknown-linux-musl"

prepare() {
	default_prepare || return 1

	cd "$builddir"

	# Remove some bundled dependencies.
	rm -Rf src/llvm/ src/jemalloc/ || return 1

	# These tests assume that alloc_jemalloc is present, disable them.
	sed -i "1i // ignore-test jemalloc is disabled" \
		src/test/compile-fail/allocator-dylib-is-system.rs \
		src/test/compile-fail/allocator-rust-dylib-is-jemalloc.rs \
		src/test/run-pass/allocator-default.rs

	# Prepare our stage0 for bootstrapping.
	mkdir -p "$_stage0dir"
	cp -flr "$srcdir"/rustc-*$_CTARGET/rustc/* \
		"$srcdir"/rust-std-*$_CTARGET/rust-std-*/* \
		"$srcdir"/cargo-*$_CTARGET/cargo/* \
		"$_stage0dir"/
}

build() {
	cd "$builddir"

	export CARGO_HOME="$builddir/.cargo"

	# XXX: Cheat Rust build system so we can build rustc using different
	# version of (prebuilt) stable rustc than preconfigured. It's hack-ish,
	# but since we're basically rebuilding rustc with the same version,
	# it's actually safe.
	# Note: --enable-local-rebuild from #33787 didn't work, don't know why.
	local rustc_ver="$("$_stage0dir"/bin/rustc --version | cut -f2 -d ' ')"
	local rustc_key="$(printf "$rustc_ver" | md5sum | cut -c1-8)"
	sed -Ei \
		-e "s/^(rustc):.*/\1: $rustc_ver-1970-01-01/" \
		-e "s/^(rustc_key):.*/\1: $rustc_key/" \
		src/stage0.txt

	# Generate config for bootstrap.py to use our prebuilt rustc and cargo
	# for bootstrapping instead of downloading snapshot from internet.
	cat > config.toml <<-EOF
		[build]
		cargo = "$_stage0dir/bin/cargo"
		rustc = "$_stage0dir/bin/rustc"
	EOF

	# Note: rustc doesn't work well with jemalloc on musl (yet)
	./configure \
		--build="$_CTARGET" \
		--host="$_CTARGET" \
		--prefix="/usr" \
		--enable-rustbuild \
		--release-channel="stable" \
		--musl-root="/usr" \
		--llvm-root="/usr/lib/llvm-3.7" \
		--disable-docs \
		--disable-jemalloc \
		--disable-rpath || return 1

	# This is really stupid, but rustbuild doesn't provide "install"
	# command yet, so we must create a dist tarball...
	# https://github.com/rust-lang/rust/issues/34675
	make dist VERBOSE=1 || return 1

	#msg "Running tests..."
	#make check VERBOSE=1
}

# XXX: so libs doesn't have stable ABI, so they should not be registered as
# provided dependencies. The problem is that abuild doesn't provide an option
# to disable it without completely disabling dependencies tracking.
package() {
	cd "$builddir"

	_install build/dist/rustc-$pkgver-$_CTARGET.tar.gz \
		"$pkgdir"/usr || return 1

	# Python scripts are noarch, so move them to /usr/share.
	# Requires move-py-scripts-to-share.patch to be applied.
	_mv "$pkgdir"/usr/lib/rustlib/etc/*.py "$pkgdir"/$_sharedir/etc/
}

stdlib() {
	pkgdesc="The Rust Programming Language (stdlib)"
	depends="$pkgname"

	cd "$builddir"
	_install build/dist/rust-std-$pkgver-$_CTARGET.tar.gz \
		"$subpkgdir"/usr || return 1
}

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

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

	_mv "$pkgdir"/usr/bin/rust-gdb usr/bin/ || return 1
	_mv "$pkgdir"/$_sharedir/etc/gdb_*.py $_sharedir/etc/
}

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

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

	_mv "$pkgdir"/usr/bin/rust-lldb usr/bin/ || return 1
	_mv "$pkgdir"/$_sharedir/etc/lldb_*.py $_sharedir/etc/
}

_install() {
	local tarfile="$1"
	local dest="$2"

	mkdir -p "$dest"
	tar -xz -f "$tarfile" -C "$dest" --strip-components=2 --exclude=manifest.in
}

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

md5sums="a48fef30353fc9daa70b484b690ce5db  rustc-1.10.0-src.tar.gz
7d6278b0898b3c9e05cd3c622d8c7491  rustc-1.10.0-x86_64-unknown-linux-musl.tar.gz
f5ebd54888bfd8698f629b168691a47b  rust-std-1.10.0-x86_64-unknown-linux-musl.tar.gz
79f81ecfa861f4d97a3b9235e66ba594  cargo-0.11.0-nightly-x86_64-alpine-linux-musl.tar.gz
c6fc2288df0b746f5317c866800a628b  dont-require-filecheck.patch
4351eff471b20fbcf135fe311e5b0870  link-musl-dynamically.patch
27f12fb4ce42e18dcf19fd78be4c183e  llvm-with-ffi.patch
9b951149e87a99a1934af4eb7e698902  move-py-scripts-to-share.patch"
sha256sums="a4015aacf4f6d8a8239253c4da46e7abaa8584f8214d1828d2ff0a8f56176869  rustc-1.10.0-src.tar.gz
a7d8baacfa2225c923de28ecef2c9550c1d82cef3b90f6a1b8431359da7e7e69  rustc-1.10.0-x86_64-unknown-linux-musl.tar.gz
335527615fc1a5f53d41c1d8556645bfe0b4f3a39f72ad859b392392066d9239  rust-std-1.10.0-x86_64-unknown-linux-musl.tar.gz
587172026c0565e839d96b0c1d4c68c000927817398241f96682dca47fa8c3b9  cargo-0.11.0-nightly-x86_64-alpine-linux-musl.tar.gz
45ffc2e5626ce5e8e7dadecbd7cfdbf4db6bc1bba99dc54376a794011bb3919b  dont-require-filecheck.patch
8aec85b958ab975164d1673b666be0aa88d4b51b5944fa7227024b4942f52ed8  link-musl-dynamically.patch
a7d533ac9542151234911d4a48815cc53f490b8011f5eab555cbc3a95fbde2b6  llvm-with-ffi.patch
176dfddeff62f0bac918f742df6041df6ab777d0ddbfd01a73d580180781cbee  move-py-scripts-to-share.patch"
sha512sums="fdef0a4c458ce687ab2921fb879cf6f68ae7ec4d780e407fea80cb751d70d80e621fc37756358d8336383c24646d9e2869215b3591b2240904206df2e58a7e45  rustc-1.10.0-src.tar.gz
35e94c86a6abc579dcfe875ecc830522ecb8b1a0b96a03054b4020f21b1a2ee1ab2e61782dafbfaa3ce7b5b721f4b15f10e5dfac9c41b6f008152ed8b842ac67  rustc-1.10.0-x86_64-unknown-linux-musl.tar.gz
f6a89b4a1dc3d620cc1d783f62eb4f2e7a519f6b86b4d87877b854ea86ac740a0c8ea96c4ff11185bfb496861ade286ad08c3ab5e0bcc9592251406d7fb35f8a  rust-std-1.10.0-x86_64-unknown-linux-musl.tar.gz
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9ae2d8d9eff9fb6cf8fe8e902f0b87bc464cd84364734f105230785c4d8dc57ecf6872fc0532e15ac612ef11727e70ef25d08f7b084c4473017989b6c9a4593b  link-musl-dynamically.patch
ab126eea4b960924b4a4d52f73709085a3b742329364db1a3543bcae94e4e6d8f94d30983e5e06069a489678b2d195e7535ff8e66be2c518dc8b2c54cb0c8804  llvm-with-ffi.patch
19cc2725d68db3e359e0e3016028374e5818a97fdba24d0103f7d1706601c8b17c4dd95a3152e64f982f98e95ad3e949acddbea8a39ed0ba8dd4f702acc2704d  move-py-scripts-to-share.patch"