# 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() {
  cd "$BPM_SOURCE"/tools
  patch -Np1 -i "$BPM_WORKDIR"/enable-fstack-protector-strong-by-default.patch
  cd "$BPM_SOURCE"/projects/compiler-rt
  patch -Np2 -i "$BPM_WORKDIR"/remove-linux-scc.h.patch
}

# The build function is executed in the source directory
# This function is used to compile the source code
build() {
  export CC=gcc CXX=g++
  cmake -B build \
        -DCMAKE_INSTALL_PREFIX=/usr/lib/llvm${BPM_PKG_VERSION%%.*} \
        -DCMAKE_BUILD_TYPE=Release             \
        -DCMAKE_SKIP_INSTALL_RPATH=ON          \
        -DLLVM_ENABLE_FFI=ON                   \
        -DLLVM_BUILD_LLVM_DYLIB=ON             \
        -DLLVM_LINK_LLVM_DYLIB=ON              \
        -DLLVM_ENABLE_RTTI=ON                  \
        -DLLVM_BINUTILS_INCDIR=/usr/include    \
        -DLLVM_INCLUDE_BENCHMARKS=OFF          \
        -DCLANG_DEFAULT_PIE_ON_LINUX=ON        \
        -Wno-dev -G Ninja
  cmake --build build
}

_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_llvm20() {
  DESTDIR="$BPM_OUTPUT" cmake --install build

  cd "$BPM_OUTPUT"

  # Move compiler-rt files into split package
  _pick compiler-rt${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/clang/${BPM_PKG_VERSION%%.*}/bin/hwasan_symbolize
  _pick compiler-rt${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/clang/${BPM_PKG_VERSION%%.*}/include/fuzzer
  _pick compiler-rt${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/clang/${BPM_PKG_VERSION%%.*}/include/orc
  _pick compiler-rt${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/clang/${BPM_PKG_VERSION%%.*}/include/profile
  _pick compiler-rt${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/clang/${BPM_PKG_VERSION%%.*}/include/sanitizer
  _pick compiler-rt${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/clang/${BPM_PKG_VERSION%%.*}/include/xray
  _pick compiler-rt${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/clang/${BPM_PKG_VERSION%%.*}/lib
  _pick compiler-rt${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/clang/${BPM_PKG_VERSION%%.*}/share

  # Move clang files into split package
  _pick clang${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/bin/{amdgpu-arch,analyze-build,c-index-test,diagtool,git-clang-format,hmaptool,intercept-build,nvptx-arch,scan-build,scan-build-py,scan-view}
  _pick clang${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/bin/clang*
  _pick clang${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/libclang*
  _pick clang${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/cmake/clang
  _pick clang${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/include/clang-c/
  _pick clang${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/include/clang
  _pick clang${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/clang
  _pick clang${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/share/clang
  _pick clang${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/share/man/man1/scan-build.1
  _pick clang${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/share/scan-build
  _pick clang${BPM_PKG_VERSION%%.*} usr/lib/llvm${BPM_PKG_VERSION%%.*}/share/scan-view

  # Move runtime libraries into split package
  for lib in libLLVM libLLVM-"${BPM_PKG_VERSION%%.*}"; do
    _pick llvm${BPM_PKG_VERSION%%.*}-libs usr/lib/llvm${BPM_PKG_VERSION%%.*}/lib/"$lib".so*
  done

  # Create versioned symlinks from /usr/bin/ to /usr/lib/llvm${BPM_PKG_VERSION%%.*}/bin/
  install -d "$BPM_OUTPUT"/usr/bin
  local _binary
  for _binary in "$BPM_OUTPUT"/usr/lib/llvm${BPM_PKG_VERSION%%.*}/bin/*; do
    local _basename=${_binary##*/}
    ln -s ../lib/llvm${BPM_PKG_VERSION%%.*}/bin/"$_basename" "$BPM_OUTPUT"/usr/bin/"$_basename"-${BPM_PKG_VERSION%%.*}
  done

  # Install package license
  install -Dm644 "$BPM_SOURCE"/LICENSE.TXT "$BPM_OUTPUT"/usr/share/licenses/llvm${BPM_PKG_VERSION%%.*}/LICENSE.TXT
}

package_llvm20-libs() {
  # Symlink libraries
  for lib in libLLVM.so.${BPM_PKG_VERSION%.*} libLLVM-${BPM_PKG_VERSION%%.*}.so; do
    ln -s llvm${BPM_PKG_VERSION%%.*}/lib/"$lib" "$BPM_OUTPUT"/usr/lib/"$lib"
  done

  # Install package license
  install -Dm644 "$BPM_SOURCE"/LICENSE.TXT "$BPM_OUTPUT"/usr/share/licenses/llvm${BPM_PKG_VERSION%%.*}-libs/LICENSE.TXT
}

package_compiler-rt20() {
  # Install package license
  install -Dm644 "$BPM_SOURCE"/LICENSE.TXT "$BPM_OUTPUT"/usr/share/licenses/compiler-rt${BPM_PKG_VERSION%%.*}/LICENSE.TXT
}

package_clang20() {
  # Symlink libraries
  for lib in libclang-cpp.so.${BPM_PKG_VERSION%.*} libclang.so.${BPM_PKG_VERSION%.*}; do
    ln -s llvm${BPM_PKG_VERSION%%.*}/lib/"$lib" "$BPM_OUTPUT"/usr/lib/"$lib"
  done

  # Install package license
  install -Dm644 "$BPM_SOURCE"/LICENSE.TXT "$BPM_OUTPUT"/usr/share/licenses/clang${BPM_PKG_VERSION%%.*}/LICENSE.TXT
}