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//===- DependencyScanningWorker.h - clang-scan-deps worker ===---*- 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLING_DEPENDENCYSCANNING_DEPENDENCYSCANNINGWORKER_H
#define LLVM_CLANG_TOOLING_DEPENDENCYSCANNING_DEPENDENCYSCANNINGWORKER_H
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/LLVM.h"
#include "clang/Frontend/PCHContainerOperations.h"
#include "clang/Tooling/DependencyScanning/DependencyScanningService.h"
#include "clang/Tooling/DependencyScanning/ModuleDepCollector.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/FileSystem.h"
#include <optional>
#include <string>
namespace clang {
class DependencyOutputOptions;
namespace tooling {
namespace dependencies {
class DependencyScanningWorkerFilesystem;
/// A command-line tool invocation that is part of building a TU.
///
/// \see TranslationUnitDeps::Commands.
struct Command {
std::string Executable;
std::vector<std::string> Arguments;
};
class DependencyConsumer {
public:
virtual ~DependencyConsumer() {}
virtual void handleProvidedAndRequiredStdCXXModules(
std::optional<P1689ModuleInfo> Provided,
std::vector<P1689ModuleInfo> Requires) {}
virtual void handleBuildCommand(Command Cmd) {}
virtual void
handleDependencyOutputOpts(const DependencyOutputOptions &Opts) = 0;
virtual void handleFileDependency(StringRef Filename) = 0;
virtual void handlePrebuiltModuleDependency(PrebuiltModuleDep PMD) = 0;
virtual void handleModuleDependency(ModuleDeps MD) = 0;
virtual void handleDirectModuleDependency(ModuleID MD) = 0;
virtual void handleContextHash(std::string Hash) = 0;
};
/// Dependency scanner callbacks that are used during scanning to influence the
/// behaviour of the scan - for example, to customize the scanned invocations.
class DependencyActionController {
public:
virtual ~DependencyActionController();
virtual std::string lookupModuleOutput(const ModuleID &ID,
ModuleOutputKind Kind) = 0;
};
/// An individual dependency scanning worker that is able to run on its own
/// thread.
///
/// The worker computes the dependencies for the input files by preprocessing
/// sources either using a fast mode where the source files are minimized, or
/// using the regular processing run.
class DependencyScanningWorker {
public:
DependencyScanningWorker(DependencyScanningService &Service,
llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS);
/// Run the dependency scanning tool for a given clang driver command-line,
/// and report the discovered dependencies to the provided consumer. If \p
/// ModuleName isn't empty, this function reports the dependencies of module
/// \p ModuleName.
///
/// \returns false if clang errors occurred (with diagnostics reported to
/// \c DiagConsumer), true otherwise.
bool computeDependencies(StringRef WorkingDirectory,
const std::vector<std::string> &CommandLine,
DependencyConsumer &DepConsumer,
DependencyActionController &Controller,
DiagnosticConsumer &DiagConsumer,
std::optional<StringRef> ModuleName = std::nullopt);
/// \returns A \c StringError with the diagnostic output if clang errors
/// occurred, success otherwise.
llvm::Error computeDependencies(
StringRef WorkingDirectory, const std::vector<std::string> &CommandLine,
DependencyConsumer &Consumer, DependencyActionController &Controller,
std::optional<StringRef> ModuleName = std::nullopt);
bool shouldEagerLoadModules() const { return EagerLoadModules; }
private:
std::shared_ptr<PCHContainerOperations> PCHContainerOps;
/// The file system to be used during the scan.
/// This is either \c FS passed in the constructor (when performing canonical
/// preprocessing), or \c DepFS (when performing dependency directives scan).
llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS;
/// When performing dependency directives scan, this is the caching (and
/// dependency-directives-extracting) filesystem overlaid on top of \c FS
/// (passed in the constructor).
llvm::IntrusiveRefCntPtr<DependencyScanningWorkerFilesystem> DepFS;
ScanningOutputFormat Format;
/// Whether to optimize the modules' command-line arguments.
ScanningOptimizations OptimizeArgs;
/// Whether to set up command-lines to load PCM files eagerly.
bool EagerLoadModules;
};
} // end namespace dependencies
} // end namespace tooling
} // end namespace clang
#endif // LLVM_CLANG_TOOLING_DEPENDENCYSCANNING_DEPENDENCYSCANNINGWORKER_H
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