ninja_toolchain_writer.cc revision 68043e1e95eeb07d5cae7aca370b26518b0867d6 
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/item_node.h"
13#include "tools/gn/settings.h"
14#include "tools/gn/target.h"
15#include "tools/gn/toolchain.h"
16#include "tools/gn/trace.h"
17
18NinjaToolchainWriter::NinjaToolchainWriter(
19    const Settings* settings,
20    const std::vector<const Target*>& targets,
21    const std::set<std::string>& skip_files,
22    std::ostream& out)
23    : settings_(settings),
24      targets_(targets),
25      skip_files_(skip_files),
26      out_(out),
27      path_output_(settings_->build_settings()->build_dir(),
28                   ESCAPE_NINJA, true),
29      helper_(settings->build_settings()) {
30}
31
32NinjaToolchainWriter::~NinjaToolchainWriter() {
33}
34
35void NinjaToolchainWriter::Run() {
36  WriteRules();
37  WriteSubninjas();
38}
39
40// static
41bool NinjaToolchainWriter::RunAndWriteFile(
42    const Settings* settings,
43    const std::vector<const Target*>& targets,
44    const std::set<std::string>& skip_files) {
45  NinjaHelper helper(settings->build_settings());
46  base::FilePath ninja_file(settings->build_settings()->GetFullPath(
47      helper.GetNinjaFileForToolchain(settings).GetSourceFile(
48          settings->build_settings())));
49  ScopedTrace trace(TraceItem::TRACE_FILE_WRITE, FilePathToUTF8(ninja_file));
50
51  file_util::CreateDirectory(ninja_file.DirName());
52
53  std::ofstream file;
54  file.open(FilePathToUTF8(ninja_file).c_str(),
55            std::ios_base::out | std::ios_base::binary);
56  if (file.fail())
57    return false;
58
59  NinjaToolchainWriter gen(settings, targets, skip_files, file);
60  gen.Run();
61  return true;
62}
63
64void NinjaToolchainWriter::WriteRules() {
65  const Toolchain* tc = settings_->toolchain();
66  std::string indent("  ");
67
68  NinjaHelper helper(settings_->build_settings());
69  std::string rule_prefix = helper.GetRulePrefix(tc);
70
71  for (int i = Toolchain::TYPE_NONE + 1; i < Toolchain::TYPE_NUMTYPES; i++) {
72    Toolchain::ToolType tool_type = static_cast<Toolchain::ToolType>(i);
73    const Toolchain::Tool& tool = tc->GetTool(tool_type);
74    if (tool.empty())
75      continue;
76
77    out_ << "rule " << rule_prefix << Toolchain::ToolTypeToName(tool_type)
78         << std::endl;
79
80    #define WRITE_ARG(name) \
81      if (!tool.name.empty()) \
82        out_ << indent << "  " STRINGIZE(name) " = " << tool.name << std::endl;
83    WRITE_ARG(command);
84    WRITE_ARG(depfile);
85    WRITE_ARG(deps);
86    WRITE_ARG(description);
87    WRITE_ARG(pool);
88    WRITE_ARG(restat);
89    WRITE_ARG(rspfile);
90    WRITE_ARG(rspfile_content);
91    #undef WRITE_ARG
92  }
93  out_ << std::endl;
94}
95
96void NinjaToolchainWriter::WriteSubninjas() {
97  // Write subninja commands for each generated target.
98  for (size_t i = 0; i < targets_.size(); i++) {
99    if (!targets_[i]->item_node()->should_generate() ||
100        (targets_[i]->settings()->build_settings()->using_external_generator()
101         && targets_[i]->external()))
102      continue;
103
104    OutputFile ninja_file = helper_.GetNinjaFileForTarget(targets_[i]);
105    if (skip_files_.find(ninja_file.value()) != skip_files_.end())
106      continue;
107
108    out_ << "subninja ";
109    path_output_.WriteFile(out_, ninja_file);
110    out_ << std::endl;
111  }
112  out_ << std::endl;
113}
114