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feat: detect compiler default include paths
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| // | ||
| // This is a derivative work. originally part of the LLVM Project. | ||
| // Licensed 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 | ||
| // | ||
| // Copyright (c) 2023 Vinnie Falco ([email protected]) | ||
| // | ||
| // Official repository: https://github.com/cppalliance/mrdocs | ||
| // | ||
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| #include "CompilerInfo.hpp" | ||
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| #include <mrdocs/Support/Error.hpp> | ||
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| #include <llvm/Support/Program.h> | ||
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| namespace clang { | ||
| namespace mrdocs { | ||
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| std::optional<std::string> | ||
| getCompilerVerboseOutput(llvm::StringRef compilerPath) | ||
| { | ||
| if ( ! llvm::sys::fs::exists(compilerPath)) { | ||
| return std::nullopt; | ||
| } | ||
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| llvm::SmallString<128> outputPath; | ||
| if (auto ec = llvm::sys::fs::createTemporaryFile("compiler-info", "txt", outputPath)) | ||
| { | ||
| return std::nullopt; | ||
| } | ||
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| std::optional<llvm::StringRef> const redirects[] = {llvm::StringRef(), llvm::StringRef(), outputPath.str()}; | ||
| std::vector<llvm::StringRef> const args = {compilerPath, "-v", "-E", "-x", "c++", "-"}; | ||
| llvm::ArrayRef<llvm::StringRef> emptyEnv; | ||
| int const result = llvm::sys::ExecuteAndWait(compilerPath, args, emptyEnv, redirects); | ||
| if (result != 0) | ||
| { | ||
| llvm::sys::fs::remove(outputPath); | ||
| return std::nullopt; | ||
| } | ||
|
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| auto bufferOrError = llvm::MemoryBuffer::getFile(outputPath); | ||
| llvm::sys::fs::remove(outputPath); | ||
| if ( ! bufferOrError) | ||
| { | ||
| return std::nullopt; | ||
| } | ||
|
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| return bufferOrError.get()->getBuffer().str(); | ||
| } | ||
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| std::vector<std::string> | ||
| parseIncludePaths(std::string const& compilerOutput) | ||
| { | ||
| std::vector<std::string> includePaths; | ||
| std::istringstream stream(compilerOutput); | ||
| std::string line; | ||
| bool capture = false; | ||
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| while (std::getline(stream, line)) | ||
| { | ||
| if (line.find("#include <...> search starts here:") != std::string::npos) | ||
| { | ||
| capture = true; | ||
| continue; | ||
| } | ||
| if (line.find("End of search list.") != std::string::npos) | ||
| { | ||
| break; | ||
| } | ||
| if (capture) | ||
| { | ||
| line.erase(0, line.find_first_not_of(" ")); | ||
| includePaths.push_back(line); | ||
| } | ||
| } | ||
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| return includePaths; | ||
| } | ||
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| std::unordered_map<std::string, std::vector<std::string>> | ||
| getCompilersDefaultIncludeDir(clang::tooling::CompilationDatabase const& compDb) | ||
| { | ||
| std::unordered_map<std::string, std::vector<std::string>> res; | ||
| auto const allCommands = compDb.getAllCompileCommands(); | ||
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| for (auto const& cmd : allCommands) { | ||
| if ( ! cmd.CommandLine.empty()) { | ||
| auto const& compilerPath = cmd.CommandLine[0]; | ||
| if (res.contains(compilerPath)) { | ||
| continue; | ||
| } | ||
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| auto const compilerOutput = getCompilerVerboseOutput(compilerPath); | ||
| if ( ! compilerOutput) { | ||
| report::warn("Warning: could not get compiler info for \"{}\"", compilerPath); | ||
| continue; | ||
| } | ||
| std::vector<std::string> includePaths = parseIncludePaths(*compilerOutput); | ||
| res.emplace(compilerPath, std::move(includePaths)); | ||
| } | ||
| } | ||
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| return res; | ||
| } | ||
|
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| } // mrdocs | ||
| } // clang |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| // | ||
| // Licensed 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 | ||
| // | ||
| // Copyright (c) 2023 Vinnie Falco ([email protected]) | ||
| // | ||
| // Official repository: https://github.com/cppalliance/mrdocs | ||
| // | ||
|
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| #ifndef MRDOCS_TOOL_COMPILER_HPP | ||
| #define MRDOCS_TOOL_COMPILER_HPP | ||
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| #include <optional> | ||
| #include <string> | ||
| #include <vector> | ||
| #include <unordered_map> | ||
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| #include <clang/Tooling/CompilationDatabase.h> | ||
| #include <llvm/ADT/StringRef.h> | ||
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| namespace clang { | ||
| namespace mrdocs { | ||
|
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| /** | ||
| * @brief Get the compiler verbose output. | ||
| * | ||
| * @param compilerPath The compiler path. | ||
| * @return std::optional<std::string> The compiler verbose output. | ||
| */ | ||
| std::optional<std::string> | ||
| getCompilerVerboseOutput(llvm::StringRef compilerPath); | ||
|
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| /** | ||
| * @brief Parse the include paths. | ||
| * | ||
| * @param compilerOutput The compiler output. | ||
| * @return std::vector<std::string> The include paths. | ||
| */ | ||
| std::vector<std::string> | ||
| parseIncludePaths(std::string const& compilerOutput); | ||
|
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| /** | ||
| * @brief Get the compiler default include dir. | ||
| * | ||
| * @param compDb The compilation database. | ||
| * @return std::unordered_map<std::string, std::vector<std::string>> The compiler default include dir. | ||
| */ | ||
| std::unordered_map<std::string, std::vector<std::string>> | ||
| getCompilersDefaultIncludeDir(clang::tooling::CompilationDatabase const& compDb); | ||
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| } // mrdocs | ||
| } // clang | ||
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| #endif |
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