# 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>

# ALARM: Kevin Mihelich <kevin@archlinuxarm.org>
#  - remove lib32, musl, and wasm packages and related bits
#  - add a link to g++ to compensate for broken cross-compiler decisions
#  - build v6/v7 with -j2 - RAM constraints
#  - set llvm-config in config.toml for ARM architectures
#  - set debuginfo-level = 0 in config.toml - RAM constraints
#  - build aarch64 with 16k page support

highmem=1

pkgbase=rust
pkgname=(
  rust
  rust-src
)
epoch=1
pkgver=1.71.1
pkgrel=1
pkgdesc="Systems programming language focused on safety, speed and concurrency"
url=https://www.rust-lang.org/
arch=(x86_64)
license=(
  Apache
  MIT
)
options=(
  !debug
  !emptydirs
  !lto
  !strip
)
depends=(
  curl
  gcc
  gcc-libs
  libssh2
  llvm-libs
)
makedepends=(
  cmake
  libffi
  lld
  llvm
  musl
  ninja
  perl
  python
  rust
)
checkdepends=(
  gdb
  procps-ng
)
source=(
  "https://static.rust-lang.org/dist/rustc-$pkgver-src.tar.gz"{,.asc}
  0001-cargo-Change-libexec-dir.patch
  0001-bootstrap-Change-libexec-dir.patch
  0002-bootstrap-Change-bash-completion-dir.patch
  0003-compiler-Change-LLVM-targets.patch
  0004-compiler-Use-wasm-ld-for-wasm-targets.patch
  0005-bootstrap-Unbreak-building-Rust-1.71.1-with-1.71.0.patch
)
b2sums=('66c155e7a96d4c21e50feebe412fec0b4f4e3f6566f249a018b439c1e1ad1d807f00bcd854fecc267120db0a6d24939e21c86f46b1b13570b6f589d10f5b83c7'
        'SKIP'
        'd6b399d094d2c546d6fc53245e640dfb70921e250035b729bedc353a342de9daed167012810a47f4a2da3e0b70e31f89eeb02915870856ef2285a50a9553f14d'
        '71b3a5a5c169ad426fa0e6b6bf6ec5afa126bbe9257a617a248bc83f278a61990efac0b35d4ff5e50f0fa43db2e26071e1240526ae045a990c2441d0ecc92e9b'
        'fdf2159315b96337da84b45fc49b55ea73d6d14710f3967710da4fcee6d049ef9e5bb18e438e604750f4a3af9c909e58eea143f4a3c497acb7d806f834fd3b44'
        '2ecae93bc6323ef8285b590d576f8b7de385dc121317bd108e1e0863e0ef57d6bd7529564342443b182f1979d2e432a105998da61db16be8e6ea24f79c9acfcd'
        'e0acea294146ae14ec18ac1f99cb9113dfe0dbe87cfd557fb093b56fc15cf036ac076af905fbe358a11a913d2fc845619c5fd8e18ac97127c232127a28666117'
        '13a0d671e86a385237b69d7fda728f04c910eef20fc5c46ba5c4bc6b3defea0d5b34c6744f137c6b4e86d01ad098ac2c4dd0d9a114eb20749f18ffc5d34477ed')
validpgpkeys=(
  108F66205EAEB0AAA8DD5E1C85AB96E6FA1BE5FE  # Rust Language (Tag and Release Signing Key) <rust-key@rust-lang.org>
)

prepare() {
  cd rustc-$pkgver-src

  # Patch bootstrap and cargo so credential helpers
  # are in /usr/lib instead of /usr/libexec
  patch -d src/tools/cargo -Np1 < ../0001-cargo-Change-libexec-dir.patch
  patch -Np1 -i ../0001-bootstrap-Change-libexec-dir.patch

  # Put bash completions where they belong
  patch -Np1 -i ../0002-bootstrap-Change-bash-completion-dir.patch

  # Use our *-pc-linux-gnu targets, making LTO with clang simpler
  patch -Np1 -i ../0003-compiler-Change-LLVM-targets.patch

  # Use our wasm-ld
  patch -Np1 -i ../0004-compiler-Use-wasm-ld-for-wasm-targets.patch

  # https://github.com/rust-lang/rust/issues/114444
  patch -Np1 -i ../0005-bootstrap-Unbreak-building-Rust-1.71.1-with-1.71.0.patch

  cat >config.toml <<END
profile = "user"
changelog-seen = 2

[llvm]
link-shared = true

[build]
cargo = "/usr/bin/cargo"
rustc = "/usr/bin/rustc"
rustfmt = "/usr/bin/rustfmt"
locked-deps = true
vendor = true
tools = [
  "cargo",
  "clippy",
  "rustdoc",
  "rustfmt",
  "rust-analyzer-proc-macro-srv",
  "analysis",
  "src",
  "rust-demangler",
]
sanitizers = false
profiler = true

# Generating docs fails with the wasm32-* targets
docs = false

[install]
prefix = "/usr"

[rust]
debuginfo-level-std = 0
channel = "stable"
description = "Arch Linux $pkgbase $epoch:$pkgver-$pkgrel"
rpath = false
backtrace-on-ice = true
remap-debuginfo = true
jemalloc = true

# 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

# musl target produces warnings
deny-warnings = false

[dist]
compression-formats = ["gz"]

[target.x86_64-unknown-linux-gnu]
cc = "/usr/bin/gcc"
cxx = "/usr/bin/g++"
ar = "/usr/bin/gcc-ar"
ranlib = "/usr/bin/gcc-ranlib"
llvm-config = "/usr/bin/llvm-config"

[target.i686-unknown-linux-gnu]
cc = "/usr/bin/gcc"
cxx = "/usr/bin/g++"
ar = "/usr/bin/gcc-ar"
ranlib = "/usr/bin/gcc-ranlib"

[target.aarch64-unknown-linux-gnu]
cc = "/usr/bin/gcc"
cxx = "/usr/bin/g++"
ar = "/usr/bin/gcc-ar"
ranlib = "/usr/bin/gcc-ranlib"
llvm-config = "/usr/bin/llvm-config"

[target.armv7-unknown-linux-gnueabihf]
cc = "/usr/bin/gcc"
cxx = "/usr/bin/g++"
ar = "/usr/bin/gcc-ar"
ranlib = "/usr/bin/gcc-ranlib"
llvm-config = "/usr/bin/llvm-config"

[target.arm-unknown-linux-gnueabihf]
cc = "/usr/bin/gcc"
cxx = "/usr/bin/g++"
ar = "/usr/bin/gcc-ar"
ranlib = "/usr/bin/gcc-ranlib"
llvm-config = "/usr/bin/llvm-config"
END

  if [[ $CARCH == armv7h ]]; then
    mkdir path
    ln -s /usr/bin/g++ path/arm-linux-gnueabihf-g++
    export PATH="$srcdir/path:$PATH"
  fi
  if [[ $CARCH == armv7h || $CARCH == armv6h ]]; then
    jobs="-j 2"
  fi
}

_pick() {
  local p="$1" f d; shift
  for f; do
    d="$srcdir/$p/$f"
    mkdir -p "$(dirname "$d")"
    mv "$f" "$d"
    rmdir -p --ignore-fail-on-non-empty "$(dirname "$f")"
  done
}

build() {
  cd rustc-$pkgver-src

  [[ $CARCH == "aarch64" ]] && export JEMALLOC_SYS_WITH_LG_PAGE=16
  export RUST_BACKTRACE=1

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

  cd ../dest-rust

  # delete unnecessary files, e.g. files only used for the uninstall script
  rm usr/bin/*.old
  rm usr/lib/rustlib/{components,install.log,rust-installer-version,uninstall.sh}
  rm usr/lib/rustlib/manifest-*

  # rustbuild always installs copies of the shared libraries to /usr/lib,
  # overwrite them with symlinks to the per-architecture versions
  #mkdir -p usr/lib32
  #ln -srft usr/lib   usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/*.so
  #ln -srft usr/lib32 usr/lib/rustlib/i686-unknown-linux-gnu/lib/*.so

  mkdir -p usr/share/licenses/rust
  mv -t usr/share/licenses/rust usr/share/doc/rust/{COPYRIGHT,LICENSE*}

  #_pick dest-i686 usr/lib/rustlib/i686-unknown-linux-gnu usr/lib32
  #_pick dest-musl usr/lib/rustlib/x86_64-unknown-linux-musl
  #_pick dest-wasm usr/lib/rustlib/wasm32-*
  _pick dest-src  usr/lib/rustlib/src
}

package_rust() {
  optdepends=(
    'gdb: rust-gdb script'
    'lldb: rust-lldb script'
  )
  provides=(
    cargo
    rustfmt
  )
  conflicts=(
    cargo
    'rust-docs<1:1.56.1-3'
    rustfmt
  )
  replaces=(
    cargo
    cargo-tree
    'rust-docs<1:1.56.1-3'
    rustfmt
  )

  cp -a dest-rust/* "$pkgdir"
}

package_rust-src() {
  pkgdesc="Source code for the Rust standard library"
  depends=(rust)

  cp -a dest-src/* "$pkgdir"

  mkdir -p "$pkgdir/usr/share/licenses"
  ln -s rust "$pkgdir/usr/share/licenses/$pkgname"
}

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