ninja_toolchain_writer.cc revision a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7 
1// Copyright (c) 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "tools/gn/ninja_toolchain_writer.h"
6
7#include <fstream>
8
9#include "base/file_util.h"
10#include "base/strings/stringize_macros.h"
11#include "tools/gn/build_settings.h"
12#include "tools/gn/settings.h"
13#include "tools/gn/target.h"
14#include "tools/gn/toolchain.h"
15#include "tools/gn/trace.h"
16
17NinjaToolchainWriter::NinjaToolchainWriter(
18    const Settings* settings,
19    const Toolchain* toolchain,
20    const std::vector<const Target*>& targets,
21    std::ostream& out)
22    : settings_(settings),
23      toolchain_(toolchain),
24      targets_(targets),
25      out_(out),
26      path_output_(settings_->build_settings()->build_dir(),
27                   ESCAPE_NINJA, true),
28      helper_(settings->build_settings()) {
29}
30
31NinjaToolchainWriter::~NinjaToolchainWriter() {
32}
33
34void NinjaToolchainWriter::Run() {
35  WriteRules();
36  WriteSubninjas();
37}
38
39// static
40bool NinjaToolchainWriter::RunAndWriteFile(
41    const Settings* settings,
42    const Toolchain* toolchain,
43    const std::vector<const Target*>& targets) {
44  NinjaHelper helper(settings->build_settings());
45  base::FilePath ninja_file(settings->build_settings()->GetFullPath(
46      helper.GetNinjaFileForToolchain(settings).GetSourceFile(
47          settings->build_settings())));
48  ScopedTrace trace(TraceItem::TRACE_FILE_WRITE, FilePathToUTF8(ninja_file));
49
50  base::CreateDirectory(ninja_file.DirName());
51
52  std::ofstream file;
53  file.open(FilePathToUTF8(ninja_file).c_str(),
54            std::ios_base::out | std::ios_base::binary);
55  if (file.fail())
56    return false;
57
58  NinjaToolchainWriter gen(settings, toolchain, targets, file);
59  gen.Run();
60  return true;
61}
62
63void NinjaToolchainWriter::WriteRules() {
64  std::string indent("  ");
65
66  NinjaHelper helper(settings_->build_settings());
67  std::string rule_prefix = helper.GetRulePrefix(settings_);
68
69  for (int i = Toolchain::TYPE_NONE + 1; i < Toolchain::TYPE_NUMTYPES; i++) {
70    Toolchain::ToolType tool_type = static_cast<Toolchain::ToolType>(i);
71    const Toolchain::Tool& tool = toolchain_->GetTool(tool_type);
72    if (tool.command.empty())
73      continue;
74
75    out_ << "rule " << rule_prefix << Toolchain::ToolTypeToName(tool_type)
76         << std::endl;
77
78    #define WRITE_ARG(name) \
79      if (!tool.name.empty()) \
80        out_ << indent << "  " STRINGIZE(name) " = " << tool.name << std::endl;
81    WRITE_ARG(command);
82    WRITE_ARG(depfile);
83    WRITE_ARG(deps);
84    WRITE_ARG(description);
85    WRITE_ARG(pool);
86    WRITE_ARG(restat);
87    WRITE_ARG(rspfile);
88    WRITE_ARG(rspfile_content);
89    #undef WRITE_ARG
90  }
91  out_ << std::endl;
92}
93
94void NinjaToolchainWriter::WriteSubninjas() {
95  // Write subninja commands for each generated target.
96  for (size_t i = 0; i < targets_.size(); i++) {
97    OutputFile ninja_file = helper_.GetNinjaFileForTarget(targets_[i]);
98    out_ << "subninja ";
99    path_output_.WriteFile(out_, ninja_file);
100    out_ << std::endl;
101  }
102  out_ << std::endl;
103}
104