patchRequire.js 6.6 KB

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  1. "use strict";
  2. function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
  3. Object.defineProperty(exports, "__esModule", {
  4. value: true
  5. });
  6. exports["default"] = patchRequire;
  7. var path = _interopRequireWildcard(require("path"));
  8. function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function _interopRequireWildcard(e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, "default": e }; if (null === e || "object" != _typeof(e) && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (var _t in e) "default" !== _t && {}.hasOwnProperty.call(e, _t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t)) && (i.get || i.set) ? o(f, _t, i) : f[_t] = e[_t]); return f; })(e, t); }
  9. var isWin32 = process.platform === 'win32';
  10. var correctPath = isWin32 ? require('./correctPath').correctPath : function (p) {
  11. return p;
  12. };
  13. function stripBOM(content) {
  14. if (content.charCodeAt(0) === 0xFEFF) {
  15. content = content.slice(1);
  16. }
  17. return content;
  18. }
  19. function patchRequire(vol) {
  20. var unixifyPaths = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
  21. var Module = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : require('module');
  22. if (isWin32 && unixifyPaths) {
  23. var original = vol;
  24. vol = {
  25. readFileSync: function readFileSync(path, options) {
  26. return original.readFileSync(correctPath(path), options);
  27. },
  28. realpathSync: function realpathSync(path) {
  29. return original.realpathSync(correctPath(path));
  30. },
  31. statSync: function statSync(path) {
  32. return original.statSync(correctPath(path));
  33. }
  34. };
  35. }
  36. function internalModuleReadFile(path) {
  37. try {
  38. return vol.readFileSync(path, 'utf8');
  39. } catch (err) {}
  40. }
  41. function internalModuleStat(filename) {
  42. try {
  43. return vol.statSync(filename).isDirectory() ? 1 : 0;
  44. } catch (err) {
  45. return -2;
  46. }
  47. }
  48. function stat(filename) {
  49. filename = path._makeLong(filename);
  50. var cache = stat.cache;
  51. if (cache !== null) {
  52. var _result = cache.get(filename);
  53. if (_result !== undefined) return _result;
  54. }
  55. var result = internalModuleStat(filename);
  56. if (cache !== null) cache.set(filename, result);
  57. return result;
  58. }
  59. stat.cache = null;
  60. var preserveSymlinks = false;
  61. function toRealPath(requestPath) {
  62. return vol.realpathSync(requestPath);
  63. }
  64. var packageMainCache = Object.create(null);
  65. function readPackage(requestPath) {
  66. var entry = packageMainCache[requestPath];
  67. if (entry) return entry;
  68. var jsonPath = path.resolve(requestPath, 'package.json');
  69. var json = internalModuleReadFile(path._makeLong(jsonPath));
  70. if (json === undefined) {
  71. return false;
  72. }
  73. var pkg;
  74. try {
  75. var pkgJson = JSON.parse(json);
  76. pkg = packageMainCache[requestPath] = pkgJson.exports && pkgJson.exports.require || pkgJson.main;
  77. } catch (e) {
  78. e.path = jsonPath;
  79. e.message = 'Error parsing ' + jsonPath + ': ' + e.message;
  80. throw e;
  81. }
  82. return pkg;
  83. }
  84. function tryFile(requestPath, isMain) {
  85. var rc = stat(requestPath);
  86. if (preserveSymlinks && !isMain) {
  87. return rc === 0 && path.resolve(requestPath);
  88. }
  89. return rc === 0 && toRealPath(requestPath);
  90. }
  91. function tryExtensions(p, exts, isMain) {
  92. for (var i = 0; i < exts.length; i++) {
  93. var filename = tryFile(p + exts[i], isMain);
  94. if (filename) {
  95. return filename;
  96. }
  97. }
  98. return false;
  99. }
  100. function tryPackage(requestPath, exts, isMain) {
  101. var pkg = readPackage(requestPath);
  102. if (!pkg) return false;
  103. var filename = path.resolve(requestPath, pkg);
  104. return tryFile(filename, isMain) || tryExtensions(filename, exts, isMain) || tryExtensions(path.resolve(filename, 'index'), exts, isMain);
  105. }
  106. Module._extensions['.js'] = function (module, filename) {
  107. var content = vol.readFileSync(filename, 'utf8');
  108. module._compile(stripBOM(content), filename);
  109. };
  110. Module._extensions['.json'] = function (module, filename) {
  111. var content = vol.readFileSync(filename, 'utf8');
  112. try {
  113. module.exports = JSON.parse(stripBOM(content));
  114. } catch (err) {
  115. err.message = filename + ': ' + err.message;
  116. throw err;
  117. }
  118. };
  119. var warned = true;
  120. Module._findPath = function (request, paths, isMain) {
  121. if (path.isAbsolute(request)) {
  122. paths = [''];
  123. } else if (!paths || paths.length === 0) {
  124. return false;
  125. }
  126. var cacheKey = request + '\x00' + (paths.length === 1 ? paths[0] : paths.join('\x00'));
  127. var entry = Module._pathCache[cacheKey];
  128. if (entry) return entry;
  129. var exts;
  130. var trailingSlash = request.length > 0 && request.charCodeAt(request.length - 1) === 47;
  131. for (var i = 0; i < paths.length; i++) {
  132. var curPath = paths[i];
  133. if (curPath && stat(curPath) < 1) continue;
  134. var basePath = correctPath(path.resolve(curPath, request));
  135. var filename;
  136. var rc = stat(basePath);
  137. if (!trailingSlash) {
  138. if (rc === 0) {
  139. if (preserveSymlinks && !isMain) {
  140. filename = path.resolve(basePath);
  141. } else {
  142. filename = toRealPath(basePath);
  143. }
  144. } else if (rc === 1) {
  145. if (exts === undefined) exts = Object.keys(Module._extensions);
  146. filename = tryPackage(basePath, exts, isMain);
  147. }
  148. if (!filename) {
  149. if (exts === undefined) exts = Object.keys(Module._extensions);
  150. filename = tryExtensions(basePath, exts, isMain);
  151. }
  152. }
  153. if (!filename && rc === 1) {
  154. if (exts === undefined) exts = Object.keys(Module._extensions);
  155. filename = tryPackage(basePath, exts, isMain);
  156. }
  157. if (!filename && rc === 1) {
  158. if (exts === undefined) exts = Object.keys(Module._extensions);
  159. filename = tryExtensions(path.resolve(basePath, 'index'), exts, isMain);
  160. }
  161. if (filename) {
  162. if (request === '.' && i > 0) {
  163. if (!warned) {
  164. warned = true;
  165. process.emitWarning('warning: require(\'.\') resolved outside the package ' + 'directory. This functionality is deprecated and will be removed ' + 'soon.', 'DeprecationWarning', 'DEP0019');
  166. }
  167. }
  168. Module._pathCache[cacheKey] = filename;
  169. return filename;
  170. }
  171. }
  172. return false;
  173. };
  174. }