index.js 7.7 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", {
  3. value: true
  4. });
  5. exports.default = void 0;
  6. var _helperPluginUtils = require("@babel/helper-plugin-utils");
  7. var _helperModuleTransforms = require("@babel/helper-module-transforms");
  8. var _helperSimpleAccess = require("@babel/helper-simple-access");
  9. var _core = require("@babel/core");
  10. var _dynamicImport = require("./dynamic-import");
  11. var _default = (0, _helperPluginUtils.declare)((api, options) => {
  12. var _api$assumption, _api$assumption2, _api$assumption3;
  13. api.assertVersion(7);
  14. const {
  15. strictNamespace = false,
  16. mjsStrictNamespace = strictNamespace,
  17. allowTopLevelThis,
  18. strict,
  19. strictMode,
  20. noInterop,
  21. importInterop,
  22. lazy = false,
  23. allowCommonJSExports = true,
  24. loose = false
  25. } = options;
  26. const constantReexports = (_api$assumption = api.assumption("constantReexports")) != null ? _api$assumption : loose;
  27. const enumerableModuleMeta = (_api$assumption2 = api.assumption("enumerableModuleMeta")) != null ? _api$assumption2 : loose;
  28. const noIncompleteNsImportDetection = (_api$assumption3 = api.assumption("noIncompleteNsImportDetection")) != null ? _api$assumption3 : false;
  29. if (typeof lazy !== "boolean" && typeof lazy !== "function" && (!Array.isArray(lazy) || !lazy.every(item => typeof item === "string"))) {
  30. throw new Error(`.lazy must be a boolean, array of strings, or a function`);
  31. }
  32. if (typeof strictNamespace !== "boolean") {
  33. throw new Error(`.strictNamespace must be a boolean, or undefined`);
  34. }
  35. if (typeof mjsStrictNamespace !== "boolean") {
  36. throw new Error(`.mjsStrictNamespace must be a boolean, or undefined`);
  37. }
  38. const getAssertion = localName => _core.template.expression.ast`
  39. (function(){
  40. throw new Error(
  41. "The CommonJS '" + "${localName}" + "' variable is not available in ES6 modules." +
  42. "Consider setting setting sourceType:script or sourceType:unambiguous in your " +
  43. "Babel config for this file.");
  44. })()
  45. `;
  46. const moduleExportsVisitor = {
  47. ReferencedIdentifier(path) {
  48. const localName = path.node.name;
  49. if (localName !== "module" && localName !== "exports") return;
  50. const localBinding = path.scope.getBinding(localName);
  51. const rootBinding = this.scope.getBinding(localName);
  52. if (
  53. rootBinding !== localBinding || path.parentPath.isObjectProperty({
  54. value: path.node
  55. }) && path.parentPath.parentPath.isObjectPattern() || path.parentPath.isAssignmentExpression({
  56. left: path.node
  57. }) || path.isAssignmentExpression({
  58. left: path.node
  59. })) {
  60. return;
  61. }
  62. path.replaceWith(getAssertion(localName));
  63. },
  64. UpdateExpression(path) {
  65. const arg = path.get("argument");
  66. if (!arg.isIdentifier()) return;
  67. const localName = arg.node.name;
  68. if (localName !== "module" && localName !== "exports") return;
  69. const localBinding = path.scope.getBinding(localName);
  70. const rootBinding = this.scope.getBinding(localName);
  71. if (rootBinding !== localBinding) return;
  72. path.replaceWith(_core.types.assignmentExpression(path.node.operator[0] + "=", arg.node, getAssertion(localName)));
  73. },
  74. AssignmentExpression(path) {
  75. const left = path.get("left");
  76. if (left.isIdentifier()) {
  77. const localName = left.node.name;
  78. if (localName !== "module" && localName !== "exports") return;
  79. const localBinding = path.scope.getBinding(localName);
  80. const rootBinding = this.scope.getBinding(localName);
  81. if (rootBinding !== localBinding) return;
  82. const right = path.get("right");
  83. right.replaceWith(_core.types.sequenceExpression([right.node, getAssertion(localName)]));
  84. } else if (left.isPattern()) {
  85. const ids = left.getOuterBindingIdentifiers();
  86. const localName = Object.keys(ids).filter(localName => {
  87. if (localName !== "module" && localName !== "exports") return false;
  88. return this.scope.getBinding(localName) === path.scope.getBinding(localName);
  89. })[0];
  90. if (localName) {
  91. const right = path.get("right");
  92. right.replaceWith(_core.types.sequenceExpression([right.node, getAssertion(localName)]));
  93. }
  94. }
  95. }
  96. };
  97. return {
  98. name: "transform-modules-commonjs",
  99. pre() {
  100. this.file.set("@babel/plugin-transform-modules-*", "commonjs");
  101. },
  102. visitor: {
  103. CallExpression(path) {
  104. if (!this.file.has("@babel/plugin-proposal-dynamic-import")) return;
  105. if (!_core.types.isImport(path.node.callee)) return;
  106. let {
  107. scope
  108. } = path;
  109. do {
  110. scope.rename("require");
  111. } while (scope = scope.parent);
  112. (0, _dynamicImport.transformDynamicImport)(path, noInterop, this.file);
  113. },
  114. Program: {
  115. exit(path, state) {
  116. if (!(0, _helperModuleTransforms.isModule)(path)) return;
  117. path.scope.rename("exports");
  118. path.scope.rename("module");
  119. path.scope.rename("require");
  120. path.scope.rename("__filename");
  121. path.scope.rename("__dirname");
  122. if (!allowCommonJSExports) {
  123. (0, _helperSimpleAccess.default)(path, new Set(["module", "exports"]), false);
  124. path.traverse(moduleExportsVisitor, {
  125. scope: path.scope
  126. });
  127. }
  128. let moduleName = (0, _helperModuleTransforms.getModuleName)(this.file.opts, options);
  129. if (moduleName) moduleName = _core.types.stringLiteral(moduleName);
  130. const {
  131. meta,
  132. headers
  133. } = (0, _helperModuleTransforms.rewriteModuleStatementsAndPrepareHeader)(path, {
  134. exportName: "exports",
  135. constantReexports,
  136. enumerableModuleMeta,
  137. strict,
  138. strictMode,
  139. allowTopLevelThis,
  140. noInterop,
  141. importInterop,
  142. lazy,
  143. esNamespaceOnly: typeof state.filename === "string" && /\.mjs$/.test(state.filename) ? mjsStrictNamespace : strictNamespace,
  144. noIncompleteNsImportDetection,
  145. filename: this.file.opts.filename
  146. });
  147. for (const [source, metadata] of meta.source) {
  148. const loadExpr = _core.types.callExpression(_core.types.identifier("require"), [_core.types.stringLiteral(source)]);
  149. let header;
  150. if ((0, _helperModuleTransforms.isSideEffectImport)(metadata)) {
  151. if (metadata.lazy) throw new Error("Assertion failure");
  152. header = _core.types.expressionStatement(loadExpr);
  153. } else {
  154. const init = (0, _helperModuleTransforms.wrapInterop)(path, loadExpr, metadata.interop) || loadExpr;
  155. if (metadata.lazy) {
  156. header = _core.template.statement.ast`
  157. function ${metadata.name}() {
  158. const data = ${init};
  159. ${metadata.name} = function(){ return data; };
  160. return data;
  161. }
  162. `;
  163. } else {
  164. header = _core.template.statement.ast`
  165. var ${metadata.name} = ${init};
  166. `;
  167. }
  168. }
  169. header.loc = metadata.loc;
  170. headers.push(header);
  171. headers.push(...(0, _helperModuleTransforms.buildNamespaceInitStatements)(meta, metadata, constantReexports));
  172. }
  173. (0, _helperModuleTransforms.ensureStatementsHoisted)(headers);
  174. path.unshiftContainer("body", headers);
  175. path.get("body").forEach(path => {
  176. if (headers.indexOf(path.node) === -1) return;
  177. if (path.isVariableDeclaration()) {
  178. path.scope.registerDeclaration(path);
  179. }
  180. });
  181. }
  182. }
  183. }
  184. };
  185. });
  186. exports.default = _default;
  187. //# sourceMappingURL=index.js.map