//===- DependencyScanningTool.h - clang-scan-deps service ------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_TOOLING_DEPENDENCY_SCANNING_TOOL_H
#define LLVM_CLANG_TOOLING_DEPENDENCY_SCANNING_TOOL_H

#include "clang/Tooling/DependencyScanning/DependencyScanningService.h"
#include "clang/Tooling/DependencyScanning/DependencyScanningWorker.h"
#include "clang/Tooling/JSONCompilationDatabase.h"
#include <string>

namespace clang{
namespace tooling{
namespace dependencies{

/// The high-level implementation of the dependency discovery tool that runs on
/// an individual worker thread.
class DependencyScanningTool {
public:
  /// Construct a dependency scanning tool.
  ///
  /// \param Compilations     The reference to the compilation database that's
  /// used by the clang tool.
  DependencyScanningTool(DependencyScanningService &Service, const clang::tooling::CompilationDatabase &Compilations);

  /// Print out the dependency information into a string using the dependency
  /// file format that is specified in the options (-MD is the default) and
  /// return it.
  ///
  /// \returns A \c StringError with the diagnostic output if clang errors
  /// occurred, dependency file contents otherwise.
  llvm::Expected<std::string> getDependencyFile(const std::string &Input, StringRef CWD);

private:
  DependencyScanningWorker Worker;
  const tooling::CompilationDatabase &Compilations;
};

} // end namespace dependencies
} // end namespace tooling
} // end namespace clang

#endif // LLVM_CLANG_TOOLING_DEPENDENCY_SCANNING_TOOL_H