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70 lines
2.6 KiB
C++
70 lines
2.6 KiB
C++
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef TOOLS_GN_NINJA_TARGET_WRITER_H_
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#define TOOLS_GN_NINJA_TARGET_WRITER_H_
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#include <iosfwd>
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#include "base/macros.h"
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#include "tools/gn/path_output.h"
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#include "tools/gn/substitution_type.h"
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class OutputFile;
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class Settings;
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class Target;
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struct SubstitutionBits;
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// Generates one target's ".ninja" file. The toplevel "build.ninja" file is
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// generated by the NinjaBuildWriter.
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class NinjaTargetWriter {
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public:
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NinjaTargetWriter(const Target* target, std::ostream& out);
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virtual ~NinjaTargetWriter();
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// Returns the build line to be written to the toolchain build file.
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//
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// Some targets have their rules written to separate files, and some can have
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// their rules coalesced in the main build file. For the coalesced case, this
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// function will return the rules as a string. For the separate file case,
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// the separate ninja file will be written and the return string will be the
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// subninja command to load that file.
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static std::string RunAndWriteFile(const Target* target);
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virtual void Run() = 0;
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protected:
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// Writes out the substitution values that are shared between the different
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// types of tools (target gen dir, target label, etc.). Only the substitutions
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// identified by the given bits will be written.
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void WriteSharedVars(const SubstitutionBits& bits);
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// Writes to the output stream a stamp rule for input dependencies, and
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// returns the file to be appended to source rules that encodes the
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// order-only dependencies for the current target. The returned OutputFile
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// will be empty if there are no implicit dependencies and no extra target
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// dependencies passed in.
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OutputFile WriteInputDepsStampAndGetDep(
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const std::vector<const Target*>& extra_hard_deps) const;
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// Writes to the output file a final stamp rule for the target that stamps
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// the given list of files. This function assumes the stamp is for the target
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// as a whole so the stamp file is set as the target's dependency output.
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void WriteStampForTarget(const std::vector<OutputFile>& deps,
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const std::vector<OutputFile>& order_only_deps);
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const Settings* settings_; // Non-owning.
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const Target* target_; // Non-owning.
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std::ostream& out_;
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PathOutput path_output_;
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private:
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void WriteCopyRules();
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void WriteEscapedSubstitution(SubstitutionType type);
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DISALLOW_COPY_AND_ASSIGN(NinjaTargetWriter);
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};
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#endif // TOOLS_GN_NINJA_TARGET_WRITER_H_
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