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8d5d758676
Create a path that swift-frontend can execute an uncached job from modules built with CAS based explicit module build. The new flag -import-module-from-cas will allow an uncached build to load module from CAS, and combined with source file from real file system to build the current module. This allows quick iterations that bypasses CAS, without full dependency scanning every time in between. rdar://152441866
88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
//===--- CASOptions.h - CAS & caching options -------------------*- C++ -*-===//
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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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//
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// This file defines the CASOptions class, which provides various
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// CAS and caching flags.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_BASIC_CASOPTIONS_H
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#define SWIFT_BASIC_CASOPTIONS_H
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#include "clang/CAS/CASOptions.h"
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#include "llvm/ADT/Hashing.h"
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namespace swift {
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class CASOptions final {
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public:
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/// Enable compiler caching.
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bool EnableCaching = false;
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/// Enable compiler caching remarks.
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bool EnableCachingRemarks = false;
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/// Skip replaying outputs from cache.
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bool CacheSkipReplay = false;
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/// Import modules from CAS.
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bool ImportModuleFromCAS = false;
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/// CASOptions
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clang::CASOptions CASOpts;
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/// Clang Include Trees.
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std::string ClangIncludeTree;
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/// Clang Include Tree FileList.
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std::string ClangIncludeTreeFileList;
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/// CacheKey for input file.
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std::string InputFileKey;
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/// Cache key for imported bridging header.
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std::string BridgingHeaderPCHCacheKey;
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/// Has immutable file system input.
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bool HasImmutableFileSystem = false;
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/// Get the CAS configuration flags.
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void enumerateCASConfigurationFlags(
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llvm::function_ref<void(llvm::StringRef)> Callback) const;
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/// Check to see if a CASFileSystem is required.
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bool requireCASFS() const {
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return EnableCaching &&
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(!ClangIncludeTree.empty() || !ClangIncludeTreeFileList.empty() ||
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!InputFileKey.empty() || !BridgingHeaderPCHCacheKey.empty());
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}
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/// Return a hash code of any components from these options that should
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/// contribute to a Swift Bridging PCH hash.
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llvm::hash_code getPCHHashComponents() const {
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// The CASIDs are generated from scanner, thus not part of the hash since
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// they will always be empty when requested.
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// TODO: Add frozen clang::CASOptions to the hash.
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return llvm::hash_combine(EnableCaching);
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}
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/// Return a hash code of any components from these options that should
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/// contribute to a Swift Dependency Scanning hash.
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llvm::hash_code getModuleScanningHashComponents() const {
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return getPCHHashComponents();
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}
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};
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} // namespace swift
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#endif // SWIFT_BASIC_CASOPTIONS_H
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