================ @@ -0,0 +1,370 @@ +//===----------------- ModulesBuilder.cpp ------------------------*- C++-*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "ModulesBuilder.h" + +#include "Compiler.h" +#include "support/Logger.h" + +#include "clang/Frontend/FrontendAction.h" +#include "clang/Frontend/FrontendActions.h" + +#include "clang/Serialization/ASTReader.h" + +namespace clang { +namespace clangd { + +namespace { + +// Create a path to store module files. Generally it should be: +// +// {TEMP_DIRS}/clangd/module_files/{PrefixDir}-%%-%%-%%-%%-%%-%%/. +// +// {TEMP_DIRS} is the temporary directory for the system, e.g., "/var/tmp" +// or "C:/TEMP". +// +// '%%' means random value to make the generated path unique. +// +// \param MainFile is used to get the root of the project from global +// compilation database. \param PrefixDir is used to get the user +// defined prefix for module files. This is useful when we want to seperate +// module files. e.g., we want to build module files for the same module unit +// `a.cppm` with 2 different users `b.cpp` and `c.cpp` and we don't want the +// module file for `b.cpp` be conflict with the module files for `c.cpp`. Then +// we can put the 2 module files into different dirs like: +// +// ${TEMP_DIRS}/clangd/module_files/b.cpp/a.pcm +// ${TEMP_DIRS}/clangd/module_files/c.cpp/a.pcm +// +// TODO: Move these module fils out of the temporary directory if the module +// files are persistent. +llvm::SmallString<256> getUniqueModuleFilesPath(PathRef MainFile, + llvm::StringRef PrefixDir) { + llvm::SmallString<256> ResultPattern; + + llvm::sys::path::system_temp_directory(/*erasedOnReboot=*/true, + ResultPattern); + + llvm::sys::path::append(ResultPattern, "clangd"); + llvm::sys::path::append(ResultPattern, "module_files"); + + llvm::sys::path::append(ResultPattern, PrefixDir); + + ResultPattern.append("-%%-%%-%%-%%-%%-%%"); + + llvm::SmallString<256> Result; + llvm::sys::fs::createUniquePath(ResultPattern, Result, + /*MakeAbsolute=*/false); + + llvm::sys::fs::create_directories(Result); + return Result; +} + +// Get the absolute path for the filename from the compile command. +llvm::SmallString<128> getAbsolutePath(const tooling::CompileCommand &Cmd) { + llvm::SmallString<128> AbsolutePath; + if (llvm::sys::path::is_absolute(Cmd.Filename)) { + AbsolutePath = Cmd.Filename; + } else { + AbsolutePath = Cmd.Directory; + llvm::sys::path::append(AbsolutePath, Cmd.Filename); + llvm::sys::path::remove_dots(AbsolutePath, true); + } + return AbsolutePath; +} + +// Get a unique module file path under \param ModuleFilesPrefix. +std::string getModuleFilePath(llvm::StringRef ModuleName, + PathRef ModuleFilesPrefix) { + llvm::SmallString<256> ModuleFilePattern(ModuleFilesPrefix); + auto [PrimaryModuleName, PartitionName] = ModuleName.split(':'); + llvm::sys::path::append(ModuleFilePattern, PrimaryModuleName); + if (!PartitionName.empty()) { + ModuleFilePattern.append("-"); + ModuleFilePattern.append(PartitionName); + } + + ModuleFilePattern.append(".pcm"); + + llvm::SmallString<256> ModuleFilePath; + llvm::sys::fs::createUniquePath(ModuleFilePattern, ModuleFilePath, + /*MakeAbsolute=*/false); ---------------- kadircet wrote:
there's nothing "random" in the file-name anymore, you can drop this. https://github.com/llvm/llvm-project/pull/66462 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
