# Description: the Rust language, binary version
# URL: https://rust-lang.org/
# Maintainer: John McQuah, jmcquah at disroot dot org
# Depends on: llvm

name=rust-bin
version=1.86.0
release=1
source=()
LIBC=$(awk -v RS="" -v FS="\n" '/\nusr\/lib\/libc.so\n/ { print $1 }' /var/lib/pkg/db)
[ "$LIBC" != glibc ] || LIBC=gnu

download_source() {
  local u="https://static.rust-lang.org/dist/rust-$version-x86_64-unknown-linux-$LIBC.tar.gz"
  local h="${u##*/}"
  local completed
  [ -s "$PKGMK_SOURCE_DIR/$h" ] && completed=1 || completed=0

  # start with the mirrors defined in pkgmk.conf, then fall back to the upstream url
  while (( m <= ${#PKGMK_SOURCE_MIRRORS[@]} )) && [ $completed = 0 ]; do
    [ "${PKGMK_SOURCE_MIRRORS[m]}" = "" ] && um="$u" || um=${PKGMK_SOURCE_MIRRORS[m]%/}/$h
    m=$(( m+1 ))
    # interrupted downloads from a previous run should be put where curl will find them
    if [ -f "$PKGMK_SOURCE_DIR/$h.partial" ]; then
        ln -sf "$PKGMK_SOURCE_DIR/$h.partial" .
        OCONTINUE="-C -"
    fi

    if curl -L -# --fail --ftp-pasv --retry 3 --retry-delay 3 -o $h.partial $OCONTINUE $um; then
       completed=1
       mv "$h.partial" "$PKGMK_SOURCE_DIR/$h"
       ln -sf "$PKGMK_SOURCE_DIR/$h" .
    else
       [ ! -s "$h.partial" ] || mv "$h.partial" "$PKGMK_SOURCE_DIR"
    fi
  done

  [ $completed = 1 ] || return $E_DOWNLOAD
}

unpack_source() {
  declare -A cksums
  # Remember to edit this array whenever a new rust is released.
  cksums=([gnu]=f6a8c0d8b8a8a737c40eee78abe286a3cbe984d96b63de9ae83443360e3264bf
        [musl]=2d399a43e1e4a2dea0e16f83cd0a1dd53f7f32250ba25970ea5d9c31a16df611)
  local h="$PKGMK_SOURCE_DIR/rust-$version-x86_64-unknown-linux-$LIBC.tar.gz"
  [ -s "$h" ] && cksums[found]=$(shasum -a 256 "$h" | cut -d" " -f1)
  [ "${cksums[found]}" = "${cksums[$LIBC]}" ] || return $E_UNPACK
  bsdtar -p -o -C $SRC -xf "$h"
}

build() {
  cd rust-$version-x86_64-unknown-linux-$LIBC
  ./install.sh --prefix=/usr --destdir=$PKG --disable-ldconfig

  # clean up junk files
  mv $PKG/usr/libexec/* $PKG/usr/lib
  rmdir $PKG/usr/libexec
  rm -rf $PKG/usr/share/doc
  prt-get isinst bash-completion >/dev/null || rm -rf $PKG/usr/etc/bash_completion.d
  prt-get isinst zsh >/dev/null || rm -rf $PKG/usr/share/zsh
  rm -f $PKG/usr/lib/rustlib/{install.log,uninstall.sh}
}

make_footprint() {
  pkginfo -f "$PKGMK_PACKAGE_DIR/$name#$version-$release.pkg.tar.$PKGMK_COMPRESSION_MODE" \
    | sed -e 's,\(gnu\|musl\)\(/\|$\),LIBC\2,' \
          -e '/[0-9a-f]\{16\}/d; /lib\/self-contained/d' \
          -e '/librustc-stable.*\(dfsan\|safestack\).a/d' \
          -e '/libLLVM.*19/d' | sort -k 3
  # lib/self-contained/ path only appears in the musl tarball,
  # libLLVM.*19 and librustc-stable.* paths only appear in the glibc tarball.
  # Filenames with 16-digit random hashes will also be different between the
  # two tarballs. Delete such paths here, and the same footprint file can 
  # serve for both libc providers.
}