# This is the source.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

DOWNLOAD="https://static.rust-lang.org/dist/rustc-${BPM_PKG_VERSION}-src.tar.xz"
FILENAME="${DOWNLOAD##*/}"

# The prepare function is executed in the root of the temp directory
# This function is used for downloading files and putting them into the correct location
prepare() {
  wget "$DOWNLOAD"
  tar -xvf "$FILENAME" --strip-components=1 -C "$BPM_SOURCE"

  # 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() {
  sed '/MirOpt/d' -i src/bootstrap/src/core/builder/mod.rs

  export LIBSQLITE3_SYS_USE_PKG_CONFIG=1
  
  python3 x.py build
}

# 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

  # Move src subdirectory to rust-src package
  mkdir "$BPM_SOURCE"/output-rust-src
  install -d "$BPM_SOURCE"/output-rust-src/usr/lib/rustlib/
  mv "$BPM_OUTPUT"/usr/lib/rustlib/src "$BPM_SOURCE"/output-rust-src/usr/lib/rustlib/src

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

  # 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() {
  # Replace 'output' directory with 'output-rust-src'
  rmdir "$BPM_OUTPUT"
  mv "$BPM_SOURCE"/output-rust-src "$BPM_OUTPUT"
  
  # Symlink to rust licence directory
  install -d "$BPM_OUTPUT"/usr/share/licenses/
  ln -sf rustc "$BPM_OUTPUT"/usr/share/licenses/rust-src
}