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.
8 #include "base/files/file_path.h"
9 #include "base/files/file_util.h"
10 #include "base/strings/string_number_conversions.h"
11 #include "base/strings/utf_string_conversions.h"
12 #include "build/build_config.h"
14 // Usage: just run in the directory where you want your test source root to be.
16 int files_written = 0;
17 int targets_written = 0;
19 base::FilePath UTF8ToFilePath(const std::string& s) {
21 return base::FilePath(base::UTF8ToWide(s));
23 return base::FilePath(s);
27 std::string FilePathToUTF8(const base::FilePath& path) {
29 return base::WideToUTF8(path.value());
35 base::FilePath RepoPathToPathName(const std::vector<int>& repo_path) {
37 for (size_t i = 0; i < repo_path.size(); i++) {
38 ret = ret.Append(UTF8ToFilePath(base::IntToString(repo_path[i])));
43 std::string TargetIndexToLetter(int target_index) {
45 ret[0] = 'a' + target_index;
50 std::string RepoPathToTargetName(const std::vector<int>& repo_path,
53 for (size_t i = 0; i < repo_path.size(); i++) {
56 ret.append(base::IntToString(repo_path[i]));
58 ret += TargetIndexToLetter(target_index);
62 std::string RepoPathToFullTargetName(const std::vector<int>& repo_path,
65 for (size_t i = 0; i < repo_path.size(); i++) {
67 ret.append(base::IntToString(repo_path[i]));
70 ret += ":" + RepoPathToTargetName(repo_path, target_index);
74 void WriteLevel(const std::vector<int>& repo_path,
77 int targets_per_level,
78 int files_per_target) {
79 base::FilePath dirname = RepoPathToPathName(repo_path);
80 base::FilePath filename = dirname.AppendASCII("BUILD.gn");
81 std::cout << "Writing " << FilePathToUTF8(filename) << "\n";
83 // Don't keep the file open while recursing.
85 base::CreateDirectory(dirname);
88 file.open(FilePathToUTF8(filename).c_str(),
89 std::ios_base::out | std::ios_base::binary);
92 for (int i = 0; i < targets_per_level; i++) {
94 file << "executable(\"" << RepoPathToTargetName(repo_path, i)
96 file << " sources = [\n";
97 for (int f = 0; f < files_per_target; f++)
98 file << " \"" << base::IntToString(f) << ".cc\",\n";
100 if (repo_path.size() < (size_t)max_depth) {
102 file << " deps = [\n";
103 for (int d = 0; d < spread; d++) {
104 std::vector<int> cur = repo_path;
106 for (int t = 0; t < targets_per_level; t++)
107 file << " \"" << RepoPathToFullTargetName(cur, t) << "\",\n";
113 if (repo_path.size() < (size_t)max_depth) {
114 // Recursively generate subdirs.
115 for (int i = 0; i < spread; i++) {
116 std::vector<int> cur = repo_path;
118 WriteLevel(cur, spread, max_depth, targets_per_level, files_per_target);
124 WriteLevel(std::vector<int>(), 5, 4, 3, 50); // 781 files, 2343 targets
125 //WriteLevel(std::vector<int>(), 6, 4, 2, 50);
126 std::cout << "Wrote " << files_written << " files and "
127 << targets_written << " targets.\n";