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2877bd0854
This performs very conservative dependency generation for each compile task within a full compilation. Any source file, swiftmodule, or Objective-C header file that is /touched/ gets added to the dependencies list, which is written out on a per-input basis at the end of compilation. This does /not/ handle dependencies for the aggregated swiftmodule, swiftdoc, generated header, or linked binary. This is just the minimum needed to get Xcode to recognize what needs to be rebuilt when a header or Swift source file changes. We can revisit this later. This finishes <rdar://problem/14899639> for now. Swift SVN r18045
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
//===- DependencyFileGenerator.cpp - .d file generation -------------------===//
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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 - 2015 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 http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Frontend/DependencyFileGenerator.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace swift;
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void DependencyFileGenerator::addDependency(StringRef file) {
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paths.insert(file);
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}
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void DependencyFileGenerator::addTarget(StringRef targetName) {
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if (!targetName.empty())
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targets.push_back(targetName);
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}
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void DependencyFileGenerator::writeToStream(llvm::raw_ostream &os) const {
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// Declare a helper for escaping file names for use in Makefiles.
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llvm::SmallString<256> pathBuf;
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auto escape = [&](StringRef raw) -> StringRef {
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pathBuf.clear();
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static const char badChars[] = " $#:\n";
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size_t prev = 0;
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for (auto index = raw.find_first_of(badChars); index != StringRef::npos;
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index = raw.find_first_of(badChars, index+1)) {
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pathBuf.append(raw.slice(prev, index));
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if (pathBuf[index] == '$')
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pathBuf.push_back('$');
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else
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pathBuf.push_back('\\');
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prev = index;
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}
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pathBuf.append(raw.substr(prev));
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return pathBuf;
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};
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// FIXME: Xcode can't currently handle multiple targets in a single
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// dependency line.
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for (StringRef targetName : targets) {
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os << targetName << " :";
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for (StringRef path : paths)
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os << ' ' << escape(path);
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os << '\n';
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}
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}
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