|
| 1 | +#include <algorithm> |
| 2 | +#include <cstdint> |
| 3 | +#include <cstring> |
| 4 | +#include <fstream> |
| 5 | +#include <iostream> |
| 6 | +#include <regex> |
| 7 | +#include <unordered_map> |
| 8 | +#include <unordered_set> |
| 9 | + |
| 10 | +#include "filesystem-polyfill/ghc/filesystem.hpp" |
| 11 | + |
| 12 | +// #define DEBUG 0 |
| 13 | + |
| 14 | +namespace { |
| 15 | + |
| 16 | +namespace fs = ghc::filesystem; |
| 17 | + |
| 18 | +std::string ReadFile(const fs::path &path) { |
| 19 | + std::ifstream ifs(path, std::ios::binary); |
| 20 | + return std::string(std::istreambuf_iterator<char>(ifs), {}); |
| 21 | +} |
| 22 | + |
| 23 | +struct IncludeStatement { |
| 24 | + std::string relpath; |
| 25 | + std::size_t line_begin; |
| 26 | + std::size_t line_end; |
| 27 | + bool duplicate; |
| 28 | +}; |
| 29 | + |
| 30 | +struct FileData { |
| 31 | + std::string contents; |
| 32 | + std::vector<IncludeStatement> includes; |
| 33 | +}; |
| 34 | + |
| 35 | +class Amalgamator { |
| 36 | + public: |
| 37 | + Amalgamator(fs::path root_dir, fs::path src_dir, |
| 38 | + std::vector<std::string> exts, |
| 39 | + std::unordered_set<std::string> exclude, std::ostream &out) |
| 40 | + : root_dir_(std::move(root_dir)), |
| 41 | + src_dir_(src_dir), |
| 42 | + exts_(exts), |
| 43 | + exclude_(exclude), |
| 44 | + out_(out) {} |
| 45 | + |
| 46 | + void Amalgamate() { |
| 47 | + LoadFiles(); |
| 48 | + |
| 49 | +#ifdef DEBUG |
| 50 | + const auto log_strings = [](const char *name, |
| 51 | + const std::vector<std::string> &xs) { |
| 52 | + std::cerr << name << " (" << xs.size() << "):"; |
| 53 | + for (const std::string &x : xs) std::cerr << " " << x; |
| 54 | + std::cerr << std::endl; |
| 55 | + }; |
| 56 | + |
| 57 | + log_strings("Files", files_); |
| 58 | +#endif |
| 59 | + |
| 60 | + for (auto &it : files_data_) { |
| 61 | + AnalyzeIncludes(it.first, &it.second); |
| 62 | + } |
| 63 | + |
| 64 | +#ifdef DEBUG |
| 65 | + log_strings("Sorted files", files_); |
| 66 | +#endif |
| 67 | + |
| 68 | + std::unordered_set<std::string> written; |
| 69 | + for (const auto &file : files_) { |
| 70 | + WriteReplaceIncludes(out_, file, /*parent=*/"", &written); |
| 71 | + } |
| 72 | + out_.flush(); |
| 73 | + } |
| 74 | + |
| 75 | + private: |
| 76 | + void WriteReplaceIncludes(std::ostream &out, const std::string relpath, |
| 77 | + const std::string &parent, |
| 78 | + std::unordered_set<std::string> *written) { |
| 79 | + if (written->find(relpath) != written->end()) return; |
| 80 | + written->insert(relpath); |
| 81 | + out << "/* AMALGAM: " << relpath; |
| 82 | + if (!parent.empty()) out << " included from " << parent; |
| 83 | + out << " */ \n"; |
| 84 | + const auto &data = files_data_.at(relpath); |
| 85 | + std::size_t prev = 0; |
| 86 | + for (const auto &incl : data.includes) { |
| 87 | + out.write(data.contents.data() + prev, incl.line_begin - prev); |
| 88 | + WriteReplaceIncludes(out, incl.relpath, relpath, written); |
| 89 | + prev = incl.line_end; |
| 90 | + } |
| 91 | + out.write(data.contents.data() + prev, data.contents.size() - prev); |
| 92 | + if (data.contents.empty() || data.contents.back() != '\n') { |
| 93 | + out.write("\n", 1); |
| 94 | + } |
| 95 | + } |
| 96 | + |
| 97 | + void LoadFiles() { |
| 98 | + for (const auto &entry : fs::recursive_directory_iterator(src_dir_)) { |
| 99 | + if (!entry.is_regular_file()) continue; |
| 100 | + const auto ext = entry.path().extension(); |
| 101 | + if (std::find(exts_.begin(), exts_.end(), ext) == exts_.end()) continue; |
| 102 | + |
| 103 | + std::string relpath = PathToSrcRelativeUnix(entry.path()); |
| 104 | + if (exclude_.find(relpath) != exclude_.end()) continue; |
| 105 | + |
| 106 | + files_.emplace_back(relpath); |
| 107 | + files_data_[std::move(relpath)] = {ReadFile(entry.path())}; |
| 108 | + } |
| 109 | + std::sort(files_.begin(), files_.end()); |
| 110 | + } |
| 111 | + |
| 112 | + void AnalyzeIncludes(const std::string &relpath, FileData *data) { |
| 113 | + static const auto *const kIncludeRegex = new std::regex( |
| 114 | + R"([ \t]*#include (<[^"\n>]*>|"[^"\n]*")[^\n]*\n)", |
| 115 | + std::regex::optimize); |
| 116 | + const char *const s = data->contents.c_str(); |
| 117 | + std::size_t pos = 0; |
| 118 | + std::unordered_set<std::string> found_includes; |
| 119 | + for (std::cmatch m; std::regex_search(s + pos, m, *kIncludeRegex); |
| 120 | + pos += m.position() + m.length()) { |
| 121 | + // Match only beginning of line: |
| 122 | + if (!(pos + m.position() == 0 || s[pos + m.position() - 1] == '\n')) { |
| 123 | + continue; |
| 124 | + } |
| 125 | + if (m[1].length() < 3) { |
| 126 | + throw std::runtime_error("Invalid include: " + m.str()); |
| 127 | + } |
| 128 | + std::string include(m[1].first + 1, m[1].length() - 2); |
| 129 | + |
| 130 | + auto found = ResolveInclude(relpath, include); |
| 131 | + if (found.empty()) continue; |
| 132 | + if (found == relpath) { |
| 133 | + std::cerr << "WARNING: Self-include in " << relpath << std::endl; |
| 134 | + continue; |
| 135 | + } |
| 136 | + const bool duplicate = found_includes.find(found) != found_includes.end(); |
| 137 | + if (duplicate) { |
| 138 | + std::cerr << "WARNING: Duplicate #include of " << found << " in " |
| 139 | + << relpath << std::endl; |
| 140 | + } |
| 141 | + found_includes.insert(found); |
| 142 | + data->includes.push_back({std::move(found), pos + m.position(), |
| 143 | + pos + m.position() + m.length(), duplicate}); |
| 144 | + } |
| 145 | + |
| 146 | +#ifdef DEBUG |
| 147 | + if (data->includes.empty()) return; |
| 148 | + std::cerr << "Includes for " << relpath << ":"; |
| 149 | + for (const auto &x : data->includes) |
| 150 | + std::cerr << " " << x.relpath << " (" << x.line_begin << "," << x.line_end |
| 151 | + << ")"; |
| 152 | + std::cerr << std::endl; |
| 153 | +#endif |
| 154 | + } |
| 155 | + |
| 156 | + std::string ResolveInclude(std::string from_relpath, std::string include) { |
| 157 | + std::string resolved; |
| 158 | + if (include[0] == '.' || files_data_.find(resolved) == files_data_.end()) { |
| 159 | + resolved = fs::path(from_relpath) |
| 160 | + .parent_path() |
| 161 | + .append(include) |
| 162 | + .lexically_normal(); |
| 163 | + } else { |
| 164 | + resolved = include; |
| 165 | + } |
| 166 | + if (files_data_.find(resolved) == files_data_.end()) { |
| 167 | + resolved.clear(); |
| 168 | + return resolved; |
| 169 | + } |
| 170 | + return resolved; |
| 171 | + } |
| 172 | + |
| 173 | + std::string PathToSrcRelativeUnix(const fs::path &path) { |
| 174 | + auto relpath = fs::relative(path, src_dir_); |
| 175 | + if (fs::path::preferred_separator == '/') return relpath.u8string(); |
| 176 | + std::string result = relpath.u8string(); |
| 177 | + std::replace(result.begin(), result.end(), fs::path::preferred_separator, |
| 178 | + '/'); |
| 179 | + return result; |
| 180 | + } |
| 181 | + |
| 182 | + fs::path root_dir_; |
| 183 | + fs::path src_dir_; |
| 184 | + std::vector<std::string> exts_; |
| 185 | + std::unordered_set<std::string> exclude_; |
| 186 | + std::ostream &out_; |
| 187 | + |
| 188 | + std::vector<std::string> files_; |
| 189 | + std::unordered_map<std::string, FileData> files_data_; |
| 190 | +}; |
| 191 | + |
| 192 | +std::vector<std::string> StrSplit(const std::string &str, char sep) { |
| 193 | + std::vector<std::string> result; |
| 194 | + std::size_t end = 0; |
| 195 | + std::size_t pos = 0; |
| 196 | + while ((pos = str.find(sep, pos)) != std::string::npos) { |
| 197 | + result.push_back(str.substr(end, pos - end)); |
| 198 | + ++pos; |
| 199 | + end = pos; |
| 200 | + } |
| 201 | + result.push_back(str.substr(end, str.size() - end)); |
| 202 | + return result; |
| 203 | +} |
| 204 | + |
| 205 | +bool StartsWith(const std::string &str, const std::string &prefix, |
| 206 | + std::size_t pos = 0) { |
| 207 | + if (pos + prefix.size() > str.size()) return false; |
| 208 | + for (std::size_t i = 0; i < prefix.size(); ++i) { |
| 209 | + if (prefix[i] != str[i + pos]) return false; |
| 210 | + } |
| 211 | + return true; |
| 212 | +} |
| 213 | + |
| 214 | +bool ParseFlag(const std::string &arg, const std::string &name, |
| 215 | + std::unordered_map<std::string, std::string> *flags) { |
| 216 | + if (!StartsWith(arg, name, 2)) return false; |
| 217 | + if (arg[name.size() + 2] != '=') { |
| 218 | + throw std::runtime_error("Invalid argument: " + arg + arg[name.size() + 2]); |
| 219 | + } |
| 220 | + flags->emplace(name, arg.substr(name.size() + 3)); |
| 221 | + return true; |
| 222 | +} |
| 223 | + |
| 224 | +} // namespace |
| 225 | + |
| 226 | +int main(int argc, char *argv[]) { |
| 227 | + fs::path root_dir; |
| 228 | + std::unordered_map<std::string, std::string> flags; |
| 229 | + for (int i = 1; i < argc; ++i) { |
| 230 | + const std::string &arg = argv[i]; |
| 231 | + if (!StartsWith(arg, "--")) { |
| 232 | + throw std::runtime_error("Invalid argument (must start with --): " + arg); |
| 233 | + } |
| 234 | + ParseFlag(arg, "root", &flags) || ParseFlag(arg, "exts", &flags) || |
| 235 | + ParseFlag(arg, "out", &flags) || ParseFlag(arg, "exclude", &flags); |
| 236 | + } |
| 237 | + |
| 238 | + const auto &root_flag = flags.find("root"); |
| 239 | + if (root_flag != flags.end() && !root_flag->second.empty()) { |
| 240 | + root_dir = root_flag->second; |
| 241 | + } else { |
| 242 | + root_dir = fs::current_path(); |
| 243 | + } |
| 244 | + |
| 245 | + std::vector<std::string> exts; |
| 246 | + const auto &exts_flag = flags.find("exts"); |
| 247 | + if (exts_flag != flags.end() && !exts_flag->second.empty()) { |
| 248 | + exts = StrSplit(exts_flag->second, ','); |
| 249 | + } else { |
| 250 | + exts = {".h", ".c", ".hpp", ".cpp"}; |
| 251 | + } |
| 252 | + |
| 253 | + std::ostream *out; |
| 254 | + std::ofstream outfile; |
| 255 | + const auto &out_flag = flags.find("out"); |
| 256 | + if (out_flag != flags.end() && !out_flag->second.empty()) { |
| 257 | + outfile = std::ofstream(out_flag->second); |
| 258 | + out = &outfile; |
| 259 | + } else { |
| 260 | + out = &std::cout; |
| 261 | + } |
| 262 | + |
| 263 | + std::unordered_set<std::string> exclude; |
| 264 | + const auto &exclude_flag = flags.find("exclude"); |
| 265 | + if (exclude_flag != flags.end()) { |
| 266 | + const auto vec = StrSplit(exclude_flag->second, ','); |
| 267 | + exclude = {vec.begin(), vec.end()}; |
| 268 | + } |
| 269 | + |
| 270 | + Amalgamator(root_dir, root_dir.append("src"), std::move(exts), |
| 271 | + std::move(exclude), *out) |
| 272 | + .Amalgamate(); |
| 273 | + if (outfile.is_open()) outfile.close(); |
| 274 | + |
| 275 | + return 0; |
| 276 | +} |
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