# Maintainer: Johannes Löthberg <johannes@kyriasis.com>
# Maintainer: Jan Alexander Steffens (heftig) <heftig@archlinux.org>
# Contributor: Alexander F Rødseth <xyproto@archlinux.org>
# Contributor: Daniel Micay <danielmicay@gmail.com>
# Contributor: userwithuid <userwithuid@gmail.com>

pkgname=('rust' 'lib32-rust-libs' 'rust-musl' 'rust-docs' 'rust-wasm')
epoch=1
pkgver=1.49.0
pkgrel=1

_llvm_ver=11.0.0

pkgdesc='Systems programming language focused on safety, speed and concurrency'
url='https://www.rust-lang.org/'
arch=('x86_64')
license=('MIT' 'Apache')

makedepends=('rust' "llvm=$_llvm_ver" 'libffi' 'lib32-gcc-libs' 'perl' 'python'
             'curl' 'cmake' 'musl')
checkdepends=('procps-ng' 'gdb')

options=('!emptydirs' '!strip')

source=("https://static.rust-lang.org/dist/rustc-$pkgver-src.tar.gz"{,.asc}
        "https://github.com/llvm/llvm-project/releases/download/llvmorg-$_llvm_ver/compiler-rt-$_llvm_ver.src.tar.xz"{,.sig})

sha256sums=('b50aefa8df1fdfc9bccafdbf37aee611c8dfe81bf5648d5f43699c50289dc779'
            'SKIP'
            '374aff82ff573a449f9aabbd330a5d0a441181c535a3599996127378112db234'
            'SKIP')
validpgpkeys=('108F66205EAEB0AAA8DD5E1C85AB96E6FA1BE5FE'  # Rust Language (Tag and Release Signing Key) <rust-key@rust-lang.org>
              '474E22316ABF4785A88C6E8EA2C794A986419D8A'  # Tom Stellard <tstellar@redhat.com>
              'B6C8F98282B944E3B0D5C2530FC3042E345AD05D') # Hans Wennborg <hans@chromium.org>

prepare() {
  cd "rustc-$pkgver-src"

  # use wasm-ld instead of rust-ldd for wasm linker
  # https://bugs.gentoo.org/715348 
  sed '/linker:/ s/rust-lld/wasm-ld/' -i compiler/rustc_target/src/spec/wasm32_base.rs

  cat >config.toml <<END
[llvm]
link-shared = true

[build]
target = ["x86_64-unknown-linux-gnu", "i686-unknown-linux-gnu", "x86_64-unknown-linux-musl", "wasm32-unknown-unknown"]
tools = ["cargo", "rls", "clippy", "miri", "rustfmt", "analysis", "src"]
cargo = "/usr/bin/cargo"
rustc = "/usr/bin/rustc"
python = "/usr/bin/python"
extended = true
sanitizers = false
profiler = true
vendor = true

[install]
prefix = "/usr"

[rust]
# LLVM crashes when passing an object through ThinLTO twice.  This is triggered
# when using rust code in cross-language LTO if libstd was built using ThinLTO.
# http://blog.llvm.org/2019/09/closing-gap-cross-language-lto-between.html
# https://github.com/rust-lang/rust/issues/54872
codegen-units-std = 1

debuginfo-level-std = 2

channel = "stable"

rpath = false

# https://github.com/rust-lang/rust/issues/74976#issuecomment-689665932
deny-warnings = false

[target.x86_64-unknown-linux-gnu]
llvm-config = "/usr/bin/llvm-config"

[target.x86_64-unknown-linux-musl]
musl-root = "/usr/lib/musl"

[target.wasm32-unknown-unknown]
wasi-root = "/usr/lib/wasi"
profiler = false

END
}

build() {
  cd "rustc-$pkgver-src"

  export RUST_BACKTRACE=1
  export RUST_COMPILER_RT_ROOT="$srcdir/compiler-rt-$_llvm_ver.src"

  python ./x.py dist -j "$(nproc)"
  DESTDIR="$PWD"/dest-rust python ./x.py install -j "$(nproc)"

  # Remove analysis data for libs that weren't installed
  # TODO: Find out where these come from
  local file lib
  while read -rd '' file; do
    lib="${file%.json}.rlib"
    lib="${lib/\/analysis\///lib/}"
    if [[ ! -e $lib ]]; then
      echo "missing '$lib'"
      rm -v "$file"
    fi
  done < <(find "dest-rust/usr/lib/rustlib"  -path '*/analysis/*.json' -print0)

  # move docs and cross targets out of the way for splitting
  mv dest-rust/usr/lib/rustlib/i686-unknown-linux-gnu dest-i686
  mv dest-rust/usr/lib/rustlib/x86_64-unknown-linux-musl dest-musl
  mv dest-rust/usr/lib/rustlib/wasm32-unknown-unknown dest-wasm
  mv dest-rust/usr/share/doc dest-doc
}

package_rust() {
  depends=('gcc-libs' 'llvm-libs' 'curl' 'libssh2')
  optdepends=('lldb: rust-lldb script'
              'gdb: rust-gdb script')
  provides=('cargo' 'rustfmt')
  conflicts=('cargo' 'rustfmt')
  replaces=('cargo' 'rustfmt' 'cargo-tree')

  cd "rustc-$pkgver-src"

  cp -a dest-rust/* "$pkgdir"
  install -Dm644 -t "$pkgdir/usr/share/licenses/$pkgname" LICENSE*

  # delete unnecesary files, e.g. components and manifest files only used for the uninstall script
  cd "$pkgdir"/usr/lib/rustlib
  rm components install.log manifest-* rust-installer-version uninstall.sh

  # rustbuild always installs copies of the shared libraries to /usr/lib,
  # overwrite them with symlinks to the per-architecture versions
  ln -srft "$pkgdir"/usr/lib x86_64-unknown-linux-gnu/lib/*.so

  install -d "$pkgdir"/usr/share/bash-completion/
  mv "$pkgdir"/etc/bash_completion.d "$pkgdir"/usr/share/bash-completion/completions
}

package_lib32-rust-libs() {
  pkgdesc='32-bit target and libraries for Rust'
  depends=('lib32-gcc-libs')
  provides=('lib32-rust')
  conflicts=('lib32-rust')
  replaces=('lib32-rust')

  cd "rustc-$pkgver-src"
  install -Dm644 -t "$pkgdir/usr/share/licenses/$pkgname" LICENSE*

  install -d "$pkgdir"/usr/lib/rustlib/ "$pkgdir"/usr/lib32/
  cp -a dest-i686 "$pkgdir"/usr/lib/rustlib/i686-unknown-linux-gnu
  ln -srft "$pkgdir"/usr/lib32 "$pkgdir"/usr/lib/rustlib/i686-unknown-linux-gnu/lib/*.so
}

package_rust-wasm() {
  pkgdesc='Wasm target for Rust'
  depends=('lld')  # brings /usr/bin/wasm-ld

  cd "rustc-$pkgver-src"
  install -Dm644 -t "$pkgdir/usr/share/licenses/$pkgname" LICENSE*

  install -d "$pkgdir"/usr/lib/rustlib/
  cp -a dest-wasm "$pkgdir"/usr/lib/rustlib/wasm32-unknown-unknown
}

package_rust-musl() {
  pkgdesc='Musl target for Rust'

  cd "rustc-$pkgver-src"
  install -Dm644 -t "$pkgdir/usr/share/licenses/$pkgname" LICENSE*

  install -d "$pkgdir"/usr/lib/rustlib/
  cp -a dest-musl "$pkgdir"/usr/lib/rustlib/x86_64-unknown-linux-musl
}

package_rust-docs() {
  pkgdesc='Documentation for the Rust programming language'

  cd "rustc-$pkgver-src"
  install -Dm644 -t "$pkgdir/usr/share/licenses/$pkgname" LICENSE*

  install -d "$pkgdir"/usr/share/
  cp -a dest-doc "$pkgdir"/usr/share/doc
}

# vim:set ts=2 sw=2 et: