216a3bd70d
files: include the .pcm file itself in the .d output, rather than including its own input files. Other forms of module file continue to be transparent for .d output. Arguably, the input files for the .pcm file are still inputs to the compilation, but that's unnecessary for make-like build systems (where the mtime of the .pcm file is sufficient) and harmful for smarter build systems that know about module files and want to track only the local dependencies. llvm-svn: 244923
95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
//===--- ModuleDependencyCollector.cpp - Collect module dependencies ------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Collect the dependencies of a set of modules.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Frontend/Utils.h"
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#include "clang/Serialization/ASTReader.h"
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#include "llvm/ADT/StringSet.h"
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#include "llvm/ADT/iterator_range.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace clang;
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namespace {
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/// Private implementation for ModuleDependencyCollector
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class ModuleDependencyListener : public ASTReaderListener {
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ModuleDependencyCollector &Collector;
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std::error_code copyToRoot(StringRef Src);
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public:
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ModuleDependencyListener(ModuleDependencyCollector &Collector)
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: Collector(Collector) {}
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bool needsInputFileVisitation() override { return true; }
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bool needsSystemInputFileVisitation() override { return true; }
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bool visitInputFile(StringRef Filename, bool IsSystem, bool IsOverridden,
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bool IsExplicitModule) override;
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};
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}
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void ModuleDependencyCollector::attachToASTReader(ASTReader &R) {
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R.addListener(llvm::make_unique<ModuleDependencyListener>(*this));
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}
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void ModuleDependencyCollector::writeFileMap() {
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if (Seen.empty())
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return;
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SmallString<256> Dest = getDest();
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llvm::sys::path::append(Dest, "vfs.yaml");
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std::error_code EC;
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llvm::raw_fd_ostream OS(Dest, EC, llvm::sys::fs::F_Text);
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if (EC) {
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setHasErrors();
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return;
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}
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VFSWriter.write(OS);
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}
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std::error_code ModuleDependencyListener::copyToRoot(StringRef Src) {
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using namespace llvm::sys;
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// We need an absolute path to append to the root.
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SmallString<256> AbsoluteSrc = Src;
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fs::make_absolute(AbsoluteSrc);
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// Canonicalize to a native path to avoid mixed separator styles.
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path::native(AbsoluteSrc);
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// TODO: We probably need to handle .. as well as . in order to have valid
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// input to the YAMLVFSWriter.
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FileManager::removeDotPaths(AbsoluteSrc);
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// Build the destination path.
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SmallString<256> Dest = Collector.getDest();
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path::append(Dest, path::relative_path(AbsoluteSrc));
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// Copy the file into place.
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if (std::error_code EC = fs::create_directories(path::parent_path(Dest),
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/*IgnoreExisting=*/true))
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return EC;
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if (std::error_code EC = fs::copy_file(AbsoluteSrc, Dest))
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return EC;
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// Use the absolute path under the root for the file mapping.
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Collector.addFileMapping(AbsoluteSrc, Dest);
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return std::error_code();
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}
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bool ModuleDependencyListener::visitInputFile(StringRef Filename, bool IsSystem,
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bool IsOverridden,
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bool IsExplicitModule) {
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if (Collector.insertSeen(Filename))
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if (copyToRoot(Filename))
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Collector.setHasErrors();
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return true;
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}
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