SUMMARY="Modern and safe systems programming language"
DESCRIPTION="Rust is a systems programming language that runs blazingly fast, \
prevents almost all crashes*, and eliminates data races."
HOMEPAGE="https://www.rust-lang.org/"
COPYRIGHT="2018 The Rust Project Developers"
LICENSE="MIT"
REVISION="2"
cargoVersion="0.29.0"
rlsVersion="0.128.0"
rustfmtVersion="0.8.2"
SOURCE_URI="https://static.rust-lang.org/dist/rustc-$portVersion-src.tar.xz"
CHECKSUM_SHA256="8a899afd4b502b4ebff5cfc82cba77a8cb37113b5e6018f15c09545936081848"
SOURCE_DIR="rustc-$portVersion-src"
PATCHES="rust-$portVersion.patchset"

ARCHITECTURES="?all !x86_gcc2"
SECONDARY_ARCHITECTURES="?x86"

PROVIDES="
	rust$secondaryArchSuffix = $portVersion
	cmd:cargo$secondaryArchSuffix = $cargoVersion
	cmd:cargo_fmt = $cargoVersion
	cmd:rls = $rlsVersion
	cmd:rust_gdb = $portVersion
	cmd:rust_lldb = $portVersion
	cmd:rustc = $portVersion
	cmd:rustdoc = $portVersion
	cmd:rustfmt = $rustfmtVersion
	"
REQUIRES="
	haiku$secondaryArchSuffix
	lib:libcrypto$secondaryArchSuffix
	lib:libcurl$secondaryArchSuffix
	lib:libssl$secondaryArchSuffix
	lib:libz$secondaryArchSuffix
	"

BUILD_REQUIRES="
	haiku${secondaryArchSuffix}_devel
	devel:libcurl$secondaryArchSuffix
	devel:libssl$secondaryArchSuffix
	devel:libz$secondaryArchSuffix
	"
BUILD_PREREQUIRES="
	cmd:cargo$secondaryArchSuffix == $cargoVersion
	cmd:cmake
	cmd:cmp
	cmd:file
	cmd:find
	cmd:gcc$secondaryArchSuffix
	cmd:git
	cmd:grep
	cmd:ld$secondaryArchSuffix
	cmd:make
	cmd:pkg_config$secondaryArchSuffix
	cmd:python
	cmd:rustc == $portVersion
	cmd:sed
	cmd:tar
	cmd:which
	cmd:xargs
	"

BUILD()
{
	# write the build configuration
	tr -d '\t' >config.toml <<- EOL
		[llvm]
		targets = "X86"
		experimental-targets = ""

		[build]
		cargo = "/$relativeBinDir/cargo"
		rustc = "/boot/system/bin/rustc"
		submodules = false
		extended = true
		tools = ["cargo", "rls", "rustfmt", "analysis"]

		[install]
		prefix = "$prefix"
		libdir = "$relativeLibDir"
		mandir = "$relativeManDir"
		docdir = "$relativeDevelopDocDir"
		sysconfdir = "$relativeDataDir"

		[rust]
		channel = "stable"
		use-jemalloc = false
		rpath = false
		deny-warnings = false
		dist-src = false

		[dist]
		src-tarball = false
EOL
	# Disable ASLR: compiling stage 1 rustc requires a lot of RAM (about 1.5
	# GB). Haiku has a per-process limit of 2GB on 32 bit systems. ASLR makes
	# the available space even smaller. Disabling it will give us the space to
	# compile Rust
	export DISABLE_ASLR=1

	# now build rust and cargo
	./x.py dist
}

INSTALL()
{
	# we will manually invoke the install scripts
	if [ $effectiveTargetArchitecture = x86 ]; then
		architecture="i686-unknown-haiku"
	fi
	if [ $effectiveTargetArchitecture = x86_64 ]; then
		architecture="x86_64-unknown-haiku"
	fi

	# let's install the packages one by one
	cd $sourceDir/build/tmp/dist/
	for module in "rust-docs-$srcGitRev-$architecture"     \
	              "rust-std-$srcGitRev-$architecture"      \
	              "rustc-$srcGitRev-$architecture"         \
	              "rust-analysis-$srcGitRev-$architecture" \
	              "cargo-$cargoVersion-$architecture"      \
	              "rls-$rlsVersion-$architecture"          \
	              "rustfmt-$rustfmtVersion-$architecture"
	do
		./$module/install.sh                               \
				--prefix=$prefix                           \
				--docdir=$developDocDir                    \
				--libdir=$libDir                           \
				--mandir=$manDir                           \
				--sysconfdir=$dataDir                      \
				--disable-ldconfig
	done

	# move the cargo and binaries (in case of a secondary arch)
	if [ -n "$secondaryArchSuffix" ]; then
		mkdir -p $binDir
		mv $prefix/bin/cargo $binDir/cargo
	fi

	# remove zsh data, it is not used on Haiku anyway
	rm -rf $prefix/share

	# move the `rustlib` folder to the developLibDirs (as it is a framework of sorts)
	# do create a link in $prefix/lib as that is where rustc expects things to live
	# Note; this actually seems to be a bug in the Rust build system. The path
	# to rustlib is hardcoded in the rustc binary, but it does allow it to be
	# set to libdir_relative (see config.rs in the bootstrap tool). This variable
	# is only set when the configure script is used to generate the config, not
	# with config.toml
	mkdir -p $developLibDir
	mv $libDir/rustlib $developLibDir
	ln -r -s $developLibDir/rustlib $prefix/lib/rustlib

	# clean out unneccesary files created by the rust installer
	rm $developLibDir/rustlib/components
	rm $developLibDir/rustlib/install.log
	rm $developLibDir/rustlib/manifest-*
	rm $developLibDir/rustlib/rust-installer-version
	rm $developLibDir/rustlib/uninstall.sh
}

TEST()
{
	./x.py test
}