#!/usr/bin/env python3 import shutil from pathlib import Path from upstream_utils import Lib def run_global_replacements(wpiutil_llvm_files: list[Path]): for wpi_file in wpiutil_llvm_files: with open(wpi_file) as f: content = f.read() # Rename namespace from llvm to wpi content = content.replace("namespace llvm", "namespace wpi") content = content.replace("llvm:", "wpi:") # Fix #includes content = content.replace('include "llvm/ADT', 'include "wpi') content = content.replace('include "llvm/Config', 'include "wpi') content = content.replace('include "llvm/Support', 'include "wpi') # Fix uses of span content = content.replace("span", "std::span") content = content.replace("include ", "include ") if wpi_file.name == "ConvertUTFWrapper.cpp": content = content.replace( "const UTF16 *Src = reinterpret_cast(SrcBytes.begin());", "const UTF16 *Src = reinterpret_cast(&*SrcBytes.begin());", ) content = content.replace( "const UTF16 *SrcEnd = reinterpret_cast(SrcBytes.end());", "const UTF16 *SrcEnd = reinterpret_cast(&*SrcBytes.begin() + SrcBytes.size());", ) content = content.replace( "const UTF32 *Src = reinterpret_cast(SrcBytes.begin());", "const UTF32 *Src = reinterpret_cast(&*SrcBytes.begin());", ) content = content.replace( "const UTF32 *SrcEnd = reinterpret_cast(SrcBytes.end());", "const UTF32 *SrcEnd = reinterpret_cast(&*SrcBytes.begin() + SrcBytes.size());", ) # Remove unused headers content = content.replace('#include "llvm-c/ErrorHandling.h"\n', "") content = content.replace('#include "wpi/Debug.h"\n', "") content = content.replace('#include "wpi/Error.h"\n', "") content = content.replace('#include "wpi/Format.h"\n', "") content = content.replace('#include "wpi/FormatVariadic.h"\n', "") content = content.replace('#include "wpi/Hashing.h"\n', "") content = content.replace('#include "wpi/NativeFormatting.h"\n', "") content = content.replace('#include "wpi/Threading.h"\n', "") content = content.replace('#include "wpi/DataTypes.h"\n', "") content = content.replace('#include "wpi/llvm-config.h"\n', "") content = content.replace('#include "wpi/abi-breaking.h"\n', "") content = content.replace('#include "wpi/config.h"\n', "") content = content.replace('#include "wpi/Signals.h"\n', "") content = content.replace('#include "wpi/Process.h"\n', "") content = content.replace('#include "wpi/Path.h"\n', "") content = content.replace('#include "wpi/Program.h"\n', "") # Fix include guards content = content.replace("LLVM_ADT_", "WPIUTIL_WPI_") content = content.replace("LLVM_SUPPORT_", "WPIUTIL_WPI_") content = content.replace("LLVM_DEFINED_HAS_FEATURE", "WPI_DEFINED_HAS_FEATURE") content = content.replace("const std::string_view &", "std::string_view ") content = content.replace("sys::fs::openFileForRead", "fs::OpenFileForRead") content = content.replace("sys::fs::closeFile", "fs::CloseFile") content = content.replace("sys::fs::", "fs::") # Replace wpi/FileSystem.h with wpi/fs.h content = content.replace('include "wpi/FileSystem.h"', 'include "wpi/fs.h"') # Replace llvm_unreachable() with wpi_unreachable() content = content.replace("llvm_unreachable", "wpi_unreachable") content = content.replace("llvm_is_multithreaded()", "1") # Revert message in copyright header content = content.replace("/// Defines the wpi::", "/// Defines the llvm::") content = content.replace("// end llvm namespace", "// end wpi namespace") content = content.replace("// end namespace llvm", "// end namespace wpi") content = content.replace("// End llvm namespace", "// End wpi namespace") content = content.replace("fs::openFileForRead", "fs::OpenFileForRead") with open(wpi_file, "w") as f: f.write(content) def flattened_llvm_files(llvm: Path, dirs_to_keep: list[Path]): file_lookup: dict[str, Path] = {} for dir_to_keep in dirs_to_keep: dir_to_crawl = llvm / dir_to_keep for root, _, files in dir_to_crawl.walk(): for f in files: file_lookup[f] = root / f return file_lookup def find_wpiutil_llvm_files(wpiutil_root: Path, subfolder: str): # These files have substantial changes, not worth managing with the patching process ignore_list = [ "StringExtras.h", "StringExtras.cpp", "MemoryBuffer.cpp", "MemoryBuffer.h", "SmallVectorMemoryBuffer.h", ] wpiutil_files: list[Path] = [] for root, _, files in (wpiutil_root / subfolder).walk(): for f in files: if f not in ignore_list: full_file = root / f wpiutil_files.append(full_file) return wpiutil_files def overwrite_files(wpiutil_files: list[Path], llvm_files: dict[str, Path]): # Very sparse rips from LLVM sources. Not worth tyring to make match upstream unmatched_files_whitelist = ["fs.h", "fs.cpp", "function_ref.h"] for wpi_file in wpiutil_files: wpi_base_name = wpi_file.name if wpi_base_name in llvm_files: shutil.copyfile(llvm_files[wpi_base_name], wpi_file) elif wpi_base_name not in unmatched_files_whitelist: print(f"No file match for {wpi_file}, check if LLVM deleted it") def overwrite_source(wpiutil_root: Path, llvm_root: Path): llvm_files = flattened_llvm_files( llvm_root, [ Path("llvm/include/llvm/ADT/"), Path("llvm/include/llvm/Config/"), Path("llvm/include/llvm/Support/"), Path("llvm/lib/Support/"), ], ) wpi_files = find_wpiutil_llvm_files( wpiutil_root, "src/main/native/thirdparty/llvm/include/wpi" ) + find_wpiutil_llvm_files( wpiutil_root, "src/main/native/thirdparty/llvm/cpp/llvm" ) overwrite_files(wpi_files, llvm_files) run_global_replacements(wpi_files) def overwrite_tests(wpiutil_root: Path, llvm_root: Path): llvm_files = flattened_llvm_files( llvm_root, [ Path("llvm/unittests/ADT/"), Path("llvm/unittests/Config/"), Path("llvm/unittests/Support/"), ], ) wpi_files = find_wpiutil_llvm_files(wpiutil_root, "src/test/native/cpp/llvm") overwrite_files(wpi_files, llvm_files) run_global_replacements(wpi_files) def copy_upstream_src(wpilib_root: Path): upstream_root = Path(".").absolute() wpiutil = wpilib_root / "wpiutil" overwrite_source(wpiutil, upstream_root) overwrite_tests(wpiutil, upstream_root) def main(): name = "llvm" url = "https://github.com/llvm/llvm-project" tag = "llvmorg-20.1.7" patch_options = { "use_threeway": True, } llvm = Lib(name, url, tag, copy_upstream_src, patch_options) llvm.main() if __name__ == "__main__": main()