source: frontend/node_modules/@babel/helper-module-transforms/lib/rewrite-live-references.js

Last change on this file was 9af201e, checked in by MBK <marija.karapandzova@…>, 12 days ago

Fix frontend appearance
  • Property mode set to 100644
File size: 13.3 KB
Line 
1"use strict";
2
3Object.defineProperty(exports, "__esModule", {
4 value: true
5});
6exports.default = rewriteLiveReferences;
7var _core = require("@babel/core");
8function isInType(path) {
9 do {
10 switch (path.parent.type) {
11 case "TSTypeAnnotation":
12 case "TSTypeAliasDeclaration":
13 case "TSTypeReference":
14 case "TypeAnnotation":
15 case "TypeAlias":
16 return true;
17 case "ExportSpecifier":
18 return path.parentPath.parent.exportKind === "type";
19 default:
20 if (path.parentPath.isStatement() || path.parentPath.isExpression()) {
21 return false;
22 }
23 }
24 } while (path = path.parentPath);
25}
26function rewriteLiveReferences(programPath, metadata, wrapReference) {
27 const imported = new Map();
28 const exported = new Map();
29 const requeueInParent = path => {
30 programPath.requeue(path);
31 };
32 for (const [source, data] of metadata.source) {
33 for (const [localName, importName] of data.imports) {
34 imported.set(localName, [source, importName, null]);
35 }
36 for (const localName of data.importsNamespace) {
37 imported.set(localName, [source, null, localName]);
38 }
39 }
40 for (const [local, data] of metadata.local) {
41 let exportMeta = exported.get(local);
42 if (!exportMeta) {
43 exportMeta = [];
44 exported.set(local, exportMeta);
45 }
46 exportMeta.push(...data.names);
47 }
48 const rewriteBindingInitVisitorState = {
49 metadata,
50 requeueInParent,
51 scope: programPath.scope,
52 exported
53 };
54 programPath.traverse(rewriteBindingInitVisitor, rewriteBindingInitVisitorState);
55 const rewriteReferencesVisitorState = {
56 seen: new WeakSet(),
57 metadata,
58 requeueInParent,
59 scope: programPath.scope,
60 imported,
61 exported,
62 buildImportReference([source, importName, localName], identNode) {
63 const meta = metadata.source.get(source);
64 meta.referenced = true;
65 if (localName) {
66 if (meta.wrap) {
67 var _wrapReference;
68 identNode = (_wrapReference = wrapReference(identNode, meta.wrap)) != null ? _wrapReference : identNode;
69 }
70 return identNode;
71 }
72 let namespace = _core.types.identifier(meta.name);
73 if (meta.wrap) {
74 var _wrapReference2;
75 namespace = (_wrapReference2 = wrapReference(namespace, meta.wrap)) != null ? _wrapReference2 : namespace;
76 }
77 if (importName === "default" && meta.interop === "node-default") {
78 return namespace;
79 }
80 const computed = metadata.stringSpecifiers.has(importName);
81 return _core.types.memberExpression(namespace, computed ? _core.types.stringLiteral(importName) : _core.types.identifier(importName), computed);
82 }
83 };
84 programPath.traverse(rewriteReferencesVisitor, rewriteReferencesVisitorState);
85}
86const rewriteBindingInitVisitor = {
87 Scope(path) {
88 path.skip();
89 },
90 ClassDeclaration(path) {
91 const {
92 requeueInParent,
93 exported,
94 metadata
95 } = this;
96 const {
97 id
98 } = path.node;
99 if (!id) throw new Error("Expected class to have a name");
100 const localName = id.name;
101 const exportNames = exported.get(localName) || [];
102 if (exportNames.length > 0) {
103 const statement = _core.types.expressionStatement(buildBindingExportAssignmentExpression(metadata, exportNames, _core.types.identifier(localName), path.scope));
104 statement._blockHoist = path.node._blockHoist;
105 requeueInParent(path.insertAfter(statement)[0]);
106 }
107 },
108 VariableDeclaration(path) {
109 const {
110 requeueInParent,
111 exported,
112 metadata
113 } = this;
114 const isVar = path.node.kind === "var";
115 for (const decl of path.get("declarations")) {
116 const {
117 id
118 } = decl.node;
119 let {
120 init
121 } = decl.node;
122 if (_core.types.isIdentifier(id) && exported.has(id.name) && !_core.types.isArrowFunctionExpression(init) && (!_core.types.isFunctionExpression(init) || init.id) && (!_core.types.isClassExpression(init) || init.id)) {
123 if (!init) {
124 if (isVar) {
125 continue;
126 } else {
127 init = path.scope.buildUndefinedNode();
128 }
129 }
130 decl.node.init = buildBindingExportAssignmentExpression(metadata, exported.get(id.name), init, path.scope);
131 requeueInParent(decl.get("init"));
132 } else {
133 for (const localName of Object.keys(decl.getOuterBindingIdentifiers())) {
134 if (exported.has(localName)) {
135 const statement = _core.types.expressionStatement(buildBindingExportAssignmentExpression(metadata, exported.get(localName), _core.types.identifier(localName), path.scope));
136 statement._blockHoist = path.node._blockHoist;
137 requeueInParent(path.insertAfter(statement)[0]);
138 }
139 }
140 }
141 }
142 }
143};
144const buildBindingExportAssignmentExpression = (metadata, exportNames, localExpr, scope) => {
145 const exportsObjectName = metadata.exportName;
146 for (let currentScope = scope; currentScope != null; currentScope = currentScope.parent) {
147 if (currentScope.hasOwnBinding(exportsObjectName)) {
148 currentScope.rename(exportsObjectName);
149 }
150 }
151 return (exportNames || []).reduce((expr, exportName) => {
152 const {
153 stringSpecifiers
154 } = metadata;
155 const computed = stringSpecifiers.has(exportName);
156 return _core.types.assignmentExpression("=", _core.types.memberExpression(_core.types.identifier(exportsObjectName), computed ? _core.types.stringLiteral(exportName) : _core.types.identifier(exportName), computed), expr);
157 }, localExpr);
158};
159const buildImportThrow = localName => {
160 return _core.template.expression.ast`
161 (function() {
162 throw new Error('"' + '${localName}' + '" is read-only.');
163 })()
164 `;
165};
166const rewriteReferencesVisitor = {
167 ReferencedIdentifier(path) {
168 const {
169 seen,
170 buildImportReference,
171 scope,
172 imported,
173 requeueInParent
174 } = this;
175 if (seen.has(path.node)) return;
176 seen.add(path.node);
177 const localName = path.node.name;
178 const importData = imported.get(localName);
179 if (importData) {
180 if (isInType(path)) {
181 throw path.buildCodeFrameError(`Cannot transform the imported binding "${localName}" since it's also used in a type annotation. ` + `Please strip type annotations using @babel/preset-typescript or @babel/preset-flow.`);
182 }
183 const localBinding = path.scope.getBinding(localName);
184 const rootBinding = scope.getBinding(localName);
185 if (rootBinding !== localBinding) return;
186 const ref = buildImportReference(importData, path.node);
187 ref.loc = path.node.loc;
188 if ((path.parentPath.isCallExpression({
189 callee: path.node
190 }) || path.parentPath.isOptionalCallExpression({
191 callee: path.node
192 }) || path.parentPath.isTaggedTemplateExpression({
193 tag: path.node
194 })) && _core.types.isMemberExpression(ref)) {
195 path.replaceWith(_core.types.sequenceExpression([_core.types.numericLiteral(0), ref]));
196 } else if (path.isJSXIdentifier() && _core.types.isMemberExpression(ref)) {
197 const {
198 object,
199 property
200 } = ref;
201 path.replaceWith(_core.types.jsxMemberExpression(_core.types.jsxIdentifier(object.name), _core.types.jsxIdentifier(property.name)));
202 } else {
203 path.replaceWith(ref);
204 }
205 requeueInParent(path);
206 path.skip();
207 }
208 },
209 UpdateExpression(path) {
210 const {
211 scope,
212 seen,
213 imported,
214 exported,
215 requeueInParent,
216 buildImportReference
217 } = this;
218 if (seen.has(path.node)) return;
219 seen.add(path.node);
220 const arg = path.get("argument");
221 if (arg.isMemberExpression()) return;
222 const update = path.node;
223 if (arg.isIdentifier()) {
224 const localName = arg.node.name;
225 if (scope.getBinding(localName) !== path.scope.getBinding(localName)) {
226 return;
227 }
228 const exportedNames = exported.get(localName);
229 const importData = imported.get(localName);
230 if ((exportedNames == null ? void 0 : exportedNames.length) > 0 || importData) {
231 if (importData) {
232 path.replaceWith(_core.types.assignmentExpression(update.operator[0] + "=", buildImportReference(importData, arg.node), buildImportThrow(localName)));
233 } else if (update.prefix) {
234 path.replaceWith(buildBindingExportAssignmentExpression(this.metadata, exportedNames, _core.types.cloneNode(update), path.scope));
235 } else {
236 const ref = scope.generateDeclaredUidIdentifier(localName);
237 path.replaceWith(_core.types.sequenceExpression([_core.types.assignmentExpression("=", _core.types.cloneNode(ref), _core.types.cloneNode(update)), buildBindingExportAssignmentExpression(this.metadata, exportedNames, _core.types.identifier(localName), path.scope), _core.types.cloneNode(ref)]));
238 }
239 }
240 }
241 requeueInParent(path);
242 path.skip();
243 },
244 AssignmentExpression: {
245 exit(path) {
246 const {
247 scope,
248 seen,
249 imported,
250 exported,
251 requeueInParent,
252 buildImportReference
253 } = this;
254 if (seen.has(path.node)) return;
255 seen.add(path.node);
256 const left = path.get("left");
257 if (left.isMemberExpression()) return;
258 if (left.isIdentifier()) {
259 const localName = left.node.name;
260 if (scope.getBinding(localName) !== path.scope.getBinding(localName)) {
261 return;
262 }
263 const exportedNames = exported.get(localName);
264 const importData = imported.get(localName);
265 if ((exportedNames == null ? void 0 : exportedNames.length) > 0 || importData) {
266 const assignment = path.node;
267 if (importData) {
268 assignment.left = buildImportReference(importData, left.node);
269 assignment.right = _core.types.sequenceExpression([assignment.right, buildImportThrow(localName)]);
270 }
271 const {
272 operator
273 } = assignment;
274 let newExpr;
275 if (operator === "=") {
276 newExpr = assignment;
277 } else if (operator === "&&=" || operator === "||=" || operator === "??=") {
278 newExpr = _core.types.assignmentExpression("=", assignment.left, _core.types.logicalExpression(operator.slice(0, -1), _core.types.cloneNode(assignment.left), assignment.right));
279 } else {
280 newExpr = _core.types.assignmentExpression("=", assignment.left, _core.types.binaryExpression(operator.slice(0, -1), _core.types.cloneNode(assignment.left), assignment.right));
281 }
282 path.replaceWith(buildBindingExportAssignmentExpression(this.metadata, exportedNames, newExpr, path.scope));
283 requeueInParent(path);
284 path.skip();
285 }
286 } else {
287 const ids = left.getOuterBindingIdentifiers();
288 const programScopeIds = Object.keys(ids).filter(localName => scope.getBinding(localName) === path.scope.getBinding(localName));
289 const id = programScopeIds.find(localName => imported.has(localName));
290 if (id) {
291 path.node.right = _core.types.sequenceExpression([path.node.right, buildImportThrow(id)]);
292 }
293 const items = [];
294 programScopeIds.forEach(localName => {
295 const exportedNames = exported.get(localName) || [];
296 if (exportedNames.length > 0) {
297 items.push(buildBindingExportAssignmentExpression(this.metadata, exportedNames, _core.types.identifier(localName), path.scope));
298 }
299 });
300 if (items.length > 0) {
301 let node = _core.types.sequenceExpression(items);
302 if (path.parentPath.isExpressionStatement()) {
303 node = _core.types.expressionStatement(node);
304 node._blockHoist = path.parentPath.node._blockHoist;
305 }
306 const statement = path.insertAfter(node)[0];
307 requeueInParent(statement);
308 }
309 }
310 }
311 },
312 ForXStatement(path) {
313 const {
314 scope,
315 node
316 } = path;
317 const {
318 left
319 } = node;
320 const {
321 exported,
322 imported,
323 scope: programScope
324 } = this;
325 if (!_core.types.isVariableDeclaration(left)) {
326 let didTransformExport = false,
327 importConstViolationName;
328 const loopBodyScope = path.get("body").scope;
329 for (const name of Object.keys(_core.types.getOuterBindingIdentifiers(left))) {
330 if (programScope.getBinding(name) === scope.getBinding(name)) {
331 if (exported.has(name)) {
332 didTransformExport = true;
333 if (loopBodyScope.hasOwnBinding(name)) {
334 loopBodyScope.rename(name);
335 }
336 }
337 if (imported.has(name) && !importConstViolationName) {
338 importConstViolationName = name;
339 }
340 }
341 }
342 if (!didTransformExport && !importConstViolationName) {
343 return;
344 }
345 path.ensureBlock();
346 const bodyPath = path.get("body");
347 const newLoopId = scope.generateUidIdentifierBasedOnNode(left);
348 path.get("left").replaceWith(_core.types.variableDeclaration("let", [_core.types.variableDeclarator(_core.types.cloneNode(newLoopId))]));
349 scope.registerDeclaration(path.get("left"));
350 if (didTransformExport) {
351 bodyPath.unshiftContainer("body", _core.types.expressionStatement(_core.types.assignmentExpression("=", left, newLoopId)));
352 }
353 if (importConstViolationName) {
354 bodyPath.unshiftContainer("body", _core.types.expressionStatement(buildImportThrow(importConstViolationName)));
355 }
356 }
357 }
358};
359
360//# sourceMappingURL=rewrite-live-references.js.map
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