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40a1b321f5
This provides the library with functionality to answer `-print-target-info` queries in place of calls to `swift-frontend`.
101 lines
4.0 KiB
C++
101 lines
4.0 KiB
C++
//===-------------- DependencyScanningTool.h - Swift Compiler -------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_DEPENDENCY_SCANNING_TOOL_H
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#define SWIFT_DEPENDENCY_SCANNING_TOOL_H
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#include "swift-c/DependencyScan/DependencyScan.h"
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#include "swift/Frontend/Frontend.h"
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#include "swift/AST/ModuleDependencies.h"
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#include "swift/DependencyScan/ScanDependencies.h"
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#include "swift/Frontend/PrintingDiagnosticConsumer.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/StringSaver.h"
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namespace swift {
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namespace dependencies {
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/// Given a set of arguments to a print-target-info frontend tool query, produce the
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/// JSON target info.
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llvm::ErrorOr<swiftscan_string_ref_t> getTargetInfo(ArrayRef<const char *> Command);
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/// The high-level implementation of the dependency scanner that runs on
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/// an individual worker thread.
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class DependencyScanningTool {
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public:
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/// Construct a dependency scanning tool.
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DependencyScanningTool();
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/// Collect the full module dependency graph for the input, ignoring any
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/// placeholder modules.
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///
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/// \returns a \c StringError with the diagnostic output if errors
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/// occurred, \c swiftscan_dependency_result_t otherwise.
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llvm::ErrorOr<swiftscan_dependency_graph_t>
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getDependencies(ArrayRef<const char *> Command,
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const llvm::StringSet<> &PlaceholderModules);
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/// Collect the set of imports for the input module
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///
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/// \returns a \c StringError with the diagnostic output if errors
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/// occurred, \c swiftscan_prescan_result_t otherwise.
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llvm::ErrorOr<swiftscan_import_set_t>
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getImports(ArrayRef<const char *> Command);
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/// Collect the full module dependency graph for the input collection of
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/// module names (batch inputs) and output them to the
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/// BatchScanInput-specified output locations.
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///
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/// \returns a \c std::error_code if errors occurred during scan.
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std::vector<llvm::ErrorOr<swiftscan_dependency_graph_t>>
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getDependencies(ArrayRef<const char *> Command,
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const std::vector<BatchScanInput> &BatchInput,
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const llvm::StringSet<> &PlaceholderModules);
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/// Writes the current `SharedCache` instance to a specified FileSystem path.
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void serializeCache(llvm::StringRef path);
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/// Loads an instance of a `GlobalModuleDependenciesCache` to serve as the `SharedCache`
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/// from a specified FileSystem path.
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bool loadCache(llvm::StringRef path);
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/// Discard the tool's current `SharedCache` and start anew.
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void resetCache();
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private:
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/// Using the specified invocation command, initialize the scanner instance
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/// for this scan. Returns the `CompilerInstance` that will be used.
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llvm::ErrorOr<std::unique_ptr<CompilerInstance>>
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initScannerForAction(ArrayRef<const char *> Command);
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/// Using the specified invocation command, instantiate a CompilerInstance
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/// that will be used for this scan.
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llvm::ErrorOr<std::unique_ptr<CompilerInstance>>
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initCompilerInstanceForScan(ArrayRef<const char *> Command);
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/// Shared cache of module dependencies, re-used by individual full-scan queries
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/// during the lifetime of this Tool.
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std::unique_ptr<GlobalModuleDependenciesCache> SharedCache;
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/// Shared cache of compiler instances created during batch scanning, corresponding to
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/// command-line options specified in the batch scan input entry.
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std::unique_ptr<CompilerArgInstanceCacheMap> VersionedPCMInstanceCacheCache;
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/// A shared consumer that, for now, just prints the encountered diagnostics.
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PrintingDiagnosticConsumer PDC;
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llvm::BumpPtrAllocator Alloc;
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llvm::StringSaver Saver;
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};
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} // end namespace dependencies
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} // end namespace swift
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#endif // SWIFT_DEPENDENCY_SCANNING_TOOL_H
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