# Contributor: Jakub Jirutka <jakub@jirutka.cz>
# Contributor: Shiz <hi@shiz.me>
# Contributor: Jeizsm <jeizsm@gmail.com>
# Maintainer: Jakub Jirutka <jakub@jirutka.cz>
pkgname=rust
pkgver=1.20.0
_llvmver=3.9
_bootver=1.19.0
pkgrel=0
pkgdesc="The Rust Programming Language (compiler)"
url="http://www.rust-lang.org"
arch="x86_64"
license="ASL-2.0 BSD ISC 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 llvm-libunwind-dev 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 8cb3112594f10a8cee5b5412c28a846acb63167f.
# * libffi-dev is needed just because we compile llvm with LLVM_ENABLE_FFI.
makedepends="rust>=$_bootver cargo
	cmake file libffi-dev llvm$_llvmver-dev python2 tar zlib-dev"

subpackages="$pkgname-dbg $pkgname-stdlib
	$pkgname-gdb::noarch $pkgname-lldb::noarch $pkgname-doc"
source="https://static.rust-lang.org/dist/rustc-$pkgver-src.tar.gz
	musl-support-dynamic-linking.patch
	musl-fix-static-linking.patch
	musl-fix-linux_musl_base.patch
	llvm-with-ffi.patch
	static-pie.patch
	need-rpath.patch
	minimize-rpath.patch
	alpine-move-py-scripts-to-share.patch
	alpine-change-rpath-to-rustlib.patch
	alpine-target.patch
	check-rustc
	"
builddir="$srcdir/rustc-$pkgver-src"

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

ldpath="/$_rlibdir"

prepare() {
	default_prepare

	cd "$builddir"

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

	# Make sure to use the system LLVM.
	printf '[target.%s]\nllvm_config = "/usr/lib/llvm%s/bin/llvm-config"\n' \
		"$CTARGET" "$_llvmver" > config.toml
}

build() {
	cd "$builddir"

	# jemalloc is disabled, because it increases size of statically linked
	# binaries produced by rustc (stripped hello_world 186 kiB vs. 358 kiB)
	# for only tiny performance boost (even negative in some tests).
	./configure \
		--build="$CBUILD" \
		--host="$CTARGET" \
		--target="$CTARGET" \
		--prefix="/usr" \
		--release-channel="stable" \
		--enable-local-rust \
		--local-rust-root="/usr" \
		--llvm-root="/usr/lib/llvm$_llvmver" \
		--musl-root="/usr" \
		--enable-vendor \
		--enable-llvm-link-shared \
		--disable-jemalloc \
		--disable-docs

	RUST_BACKTRACE=1 \
		RUST_CRT_STATIC="false" \
		./x.py build -v
}

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

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

package() {
	cd "$builddir"

	RUST_BACKTRACE=1 \
		RUST_CRT_STATIC="false" \
		./x.py dist -v

	local component; for component in rustc rust-std; do
		tar -xf "build/dist/$component-$pkgver-$CTARGET.tar.gz"
		./"$component-$pkgver-$CTARGET"/install.sh --destdir="$pkgdir" --prefix=/usr --disable-ldconfig
	done

	cd "$pkgdir"

	# These libraries are identical to those under rustlib/. Since we have
	# linked rustc/rustdoc against those under rustlib/, we can remove
	# them. Read change-rpath-to-rustlib.patch for more info.
	rm -r usr/lib/*.so

	# These objects are for static linking with musl on non-musl systems.
	rm $_rlibdir/crt*.o

	# Shared objects should have executable flag.
	chmod +x $_rlibdir/*.so

	# 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/
}

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 py-lldb"

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

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

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

sha512sums="bc7dc78f4d81b7d35309d81fae2aac1f5f157eb3350e533911e79e3323a6ea056483ff0b6c63148bd8c3d070df7172374a669fbc4554e77889cfbacb5dbb46c3  rustc-1.20.0-src.tar.gz
e797d4a21ffe5087e6a7c4d22302f0fbd8fdc2074195d7a0d22a8c52a1abe3269e14a3b865f26e13a4f70362922dd0dc5279d8a3d70617199705cc452181d889  musl-support-dynamic-linking.patch
d4d39514eca638852307f470250fd12a21781e1e7944377744b7d50290d3a2ab3776fbdfccb7a9221f5da00ca694ac3a5b8c05f72c5e1a0c8711b684b16b1084  musl-fix-static-linking.patch
9ebfb10abb50d74ff08d257d85257ce70ac3ce834aa95a8901808497b14acf3ea898fb197de64d13554eb5feedabe9fd04fec2cc6a7bea9b1335684bfcdcd88b  musl-fix-linux_musl_base.patch
dc6432293bd060d5e3a73f25870867654fae61995dcd919e244a2dc686b6107556deed8c59ca6002182bfeff5ebc1ca2b89c4028ab0fbfb79e65defe47c9b4b0  llvm-with-ffi.patch
5aaf6715b27b8b786740a55b91216d47985fbef3ccb0ef7e6a81696a2823671f8306143f7ecf77e66af91ef1500072524b9b4c7569508922ad5268df6080fda1  static-pie.patch
ff633f2a46c683ad698d1c09c98c06ce9ee9b8d55fa5593cdd485b439ebca3273794d29b5ff32b887be8666f52913a23af6e133c782bd0c4e2c88e306dd3a494  need-rpath.patch
d352614e7c774e181decae210140e789de7fc090327ff371981ad28a11ce51c8c01b27c1101a24bb84d75ed2f706f67868f7dbc52196d4ccdf4ebd2d6d6b6b5e  minimize-rpath.patch
498f4649163974afc4f042c43cd0c15d36784031514201a2962061f288a9336c2bc9749f8d2308b8ce3656f8097b5fc5bef505f61e2a6ed422ef4153f5339d77  alpine-move-py-scripts-to-share.patch
0542e8ffeb7ff6017aeec84d99c14802c6536433b41dafe7c8fc0c40908548228f34ef142ad6ad94235115b05f02ce157553b470b0f242292f90f3125b249e94  alpine-change-rpath-to-rustlib.patch
3df3fc5a8d32b47489939e1f2d8277914cea6f3cd5cacf68373d7ab97b2552356f8121e2a134b473bb4715e189ddf03a7bda95cd5f05230bdeb33a5150177d68  alpine-target.patch
79549055dea81379c890b495c82456ab497a9179ec6702c59e11d0748bc668f47fc3d6a69c27a0545bb87c01318631dffc69260bf2d4badc75f53cbf7fad7528  check-rustc"