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//== Yaml.h ---------------------------------------------------- -*- 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
//
//===----------------------------------------------------------------------===//
//
// This file defines convenience functions for handling YAML configuration files
// for checkers/packages.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LIB_STATICANALYZER_CHECKER_YAML_H
#define LLVM_CLANG_LIB_STATICANALYZER_CHECKER_YAML_H
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/Support/YAMLTraits.h"
#include <optional>
namespace clang {
namespace ento {
/// Read the given file from the filesystem and parse it as a yaml file. The
/// template parameter must have a yaml MappingTraits.
/// Emit diagnostic error in case of any failure.
template <class T, class Checker>
std::optional<T> getConfiguration(CheckerManager &Mgr, Checker *Chk,
StringRef Option, StringRef ConfigFile) {
if (ConfigFile.trim().empty())
return std::nullopt;
llvm::vfs::FileSystem *FS = llvm::vfs::getRealFileSystem().get();
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
FS->getBufferForFile(ConfigFile.str());
if (Buffer.getError()) {
Mgr.reportInvalidCheckerOptionValue(Chk, Option,
"a valid filename instead of '" +
std::string(ConfigFile) + "'");
return std::nullopt;
}
llvm::yaml::Input Input(Buffer.get()->getBuffer());
T Config;
Input >> Config;
if (std::error_code ec = Input.error()) {
Mgr.reportInvalidCheckerOptionValue(Chk, Option,
"a valid yaml file: " + ec.message());
return std::nullopt;
}
return Config;
}
} // namespace ento
} // namespace clang
#endif // LLVM_CLANG_LIB_STATICANALYZER_CHECKER_YAML_H
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