# 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 downloading files and putting them into the correct location
prepare() {
  cd "$BPM_SOURCE"
  # Fix https://github.com/llvmenv/llvmenv/issues/115
  ln -s ../../libunwind/include/mach-o MachO/mach-o
}

# The build function is executed in the source directory
# This function is used to compile the source code
build() {
  cmake -B build -G Ninja                             \
        -DCMAKE_BUILD_TYPE=Release                    \
        -DCMAKE_INSTALL_PREFIX=/usr/lib/llvm${BPM_PKG_VERSION%%.*} \
        -DCMAKE_SKIP_RPATH=ON                         \
        -DBUILD_SHARED_LIBS=ON                        \
        -DLLVM_CMAKE_DIR=/usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/cmake    \
        -DLLVM_CONFIG=/usr/lib/llvm${BPM_PKG_VERSION%%.*}/bin/llvm-config \
        -DLLVM_BUILD_DOCS=OFF                         \
        -DLLVM_ENABLE_SPHINX=OFF                      \
        -DLLVM_INCLUDE_TESTS=OFF                      \
        -DLLVM_LINK_LLVM_DYLIB=ON                     \
        -DLLVM_MAIN_SRC_DIR="${BPM_WORKDIR}"/llvm
  cmake --build build
}

# The package function is executed in the source directory
# This function is used to move the compiled files into the output directory
package() {
  DESTDIR="$BPM_OUTPUT" cmake --install build

  # Symlink libraries
  for lib in COFF Common ELF MachO MinGW Wasm; do
    ln -s llvm${BPM_PKG_VERSION%%.*}/lib/liblld"$lib".so.${BPM_PKG_VERSION%.*} "$BPM_OUTPUT"/usr/lib/liblld"$lib".so.${BPM_PKG_VERSION%.*}
  done

  # Install package license
  install -Dm644 "$BPM_SOURCE"/LICENSE.TXT "$BPM_OUTPUT"/usr/share/licenses/lld/LICENSE.TXT
}