# This is the recipe.sh script. It is executed by BPM in a temporary directory when compiling a source package
# BPM Expects the source code to be extracted into the automatically created 'source' directory which can be accessed using $BPM_SOURCE
# BPM Expects the output files to be present in the automatically created 'output' directory which can be accessed using $BPM_OUTPUT

# The prepare function is executed in the root of the temp directory
# This function is used for putting downloaded files to the correct location or applying patches
prepare() {
  # Copy rust build config to source directory
  cp "$BPM_WORKDIR"/config.toml "$BPM_SOURCE"/config.toml
}

# The build function is executed in the source directory
# This function is used to compile the source code
build() {
  export LIBSSH2_SYS_USE_PKG_CONFIG=1
  export LIBSQLITE3_SYS_USE_PKG_CONFIG=1
  
  python3 x.py build -j$(nproc)
}

_pick() {
  local p="$1" f d; shift
  for f; do
    [ -d "$BPM_WORKDIR"/output_"$p" ] || { echo "Split package $p not found"; exit 1; } 
    d="$BPM_WORKDIR"/output_"$p"/"${f#$BPM_OUTPUT}"
    mkdir -p "$(dirname "$d")"
    mv "$f" "$d"
    rmdir -p --ignore-fail-on-non-empty "$(dirname "$f")"
  done
}

# The package function is executed in the source directory
# This function is used to move the compiled files into the output directory
package_rustc() {
  DESTDIR="$BPM_OUTPUT" python3 x.py install

  # Remove unnecessary files
  rm "$BPM_OUTPUT"/usr/lib/rustlib/{components,install.log,rust-installer-version,uninstall.sh}
  rm "$BPM_OUTPUT"/usr/lib/rustlib/manifest-*

  cd "$BPM_OUTPUT"

  # Move src subdirectory to rust-src package
  _pick rust-src usr/lib/rustlib/src

  # Install package licences
  install -Dm644 "$BPM_SOURCE"/COPYRIGHT "$BPM_OUTPUT"/usr/share/licenses/rustc/COPYRIGHT
  install -Dm644 "$BPM_SOURCE"/LICENSE-MIT "$BPM_OUTPUT"/usr/share/licenses/rustc/LICENSE-MIT
  install -Dm644 "$BPM_SOURCE"/LICENSE-APACHE "$BPM_OUTPUT"/usr/share/licenses/rustc/LICENSE-APACHE
}

package_rust-src() {
  # Install package license
  install -d "$BPM_OUTPUT"/usr/share/licenses/
  ln -sf rustc "$BPM_OUTPUT"/usr/share/licenses/rust-src
}