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/gyp_target_writer.h"
6
7#include <iostream>
8
9#include "base/file_util.h"
10#include "base/files/file_path.h"
11#include "tools/gn/build_settings.h"
12#include "tools/gn/builder_record.h"
13#include "tools/gn/filesystem_utils.h"
14#include "tools/gn/gyp_binary_target_writer.h"
15#include "tools/gn/gyp_script_target_writer.h"
16#include "tools/gn/scheduler.h"
17#include "tools/gn/settings.h"
18#include "tools/gn/target.h"
19#include "tools/gn/toolchain.h"
20
21GypTargetWriter::GypTargetWriter(const Target* target,
22                                 const Toolchain* toolchain,
23                                 const SourceDir& gyp_dir,
24                                 std::ostream& out)
25    : settings_(target->settings()),
26      target_(target),
27      toolchain_(toolchain),
28      gyp_dir_(gyp_dir),
29      out_(out),
30      // All GYP paths are relative to GYP file.
31      path_output_(gyp_dir, ESCAPE_JSON, false) {
32}
33
34GypTargetWriter::~GypTargetWriter() {
35}
36
37// static
38void GypTargetWriter::WriteFile(const SourceFile& gyp_file,
39                                const std::vector<TargetGroup>& targets,
40                                const Toolchain* debug_toolchain,
41                                Err* err) {
42  if (targets.empty())
43    return;
44  const Settings* debug_settings =
45      targets[0].debug->item()->AsTarget()->settings();
46  const BuildSettings* debug_build_settings = debug_settings->build_settings();
47
48  base::FilePath gyp_file_path = debug_build_settings->GetFullPath(gyp_file);
49  base::CreateDirectory(gyp_file_path.DirName());
50
51  std::stringstream file;
52  file << "# Generated by GN. Do not edit.\n\n";
53  file << "{\n";
54
55  // Optional GYP header specified in the default debug toolchain.
56  if (!debug_toolchain->gyp_header().empty())
57    file << debug_toolchain->gyp_header() << std::endl;
58
59  file << "  'skip_includes': 1,\n";
60  file << "  'targets': [\n";
61
62  for (size_t i = 0; i < targets.size(); i++) {
63    const Target* cur = targets[i].debug->item()->AsTarget();
64    switch (cur->output_type()) {
65      case Target::COPY_FILES:
66        break;  // TODO(brettw)
67      case Target::CUSTOM: {
68        GypScriptTargetWriter writer(targets[i], debug_toolchain,
69                                     gyp_file.GetDir(), file);
70        writer.Run();
71        break;
72      }
73      case Target::GROUP:
74        break;  // TODO(brettw)
75      case Target::EXECUTABLE:
76      case Target::STATIC_LIBRARY:
77      case Target::SHARED_LIBRARY:
78      case Target::SOURCE_SET: {
79        GypBinaryTargetWriter writer(targets[i], debug_toolchain,
80                                     gyp_file.GetDir(), file);
81        writer.Run();
82        break;
83      }
84      default:
85        CHECK(0);
86    }
87  }
88
89  file << "  ],\n}\n";
90
91  std::string contents = file.str();
92  file_util::WriteFile(gyp_file_path, contents.c_str(),
93                       static_cast<int>(contents.size()));
94}
95
96std::ostream& GypTargetWriter::Indent(int spaces) {
97  return Indent(out_, spaces);
98}
99
100// static
101std::ostream& GypTargetWriter::Indent(std::ostream& out, int spaces) {
102  const char kSpaces[81] =
103      "                                        "
104      "                                        ";
105  CHECK(static_cast<size_t>(spaces) <= arraysize(kSpaces) - 1);
106  out.write(kSpaces, spaces);
107  return out;
108}
109