297 lines
No EOL
9.5 KiB
JavaScript
297 lines
No EOL
9.5 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = rewriteLiveReferences;
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var t = _interopRequireWildcard(require("@babel/types"));
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var _template = _interopRequireDefault(require("@babel/template"));
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var _helperSimpleAccess = _interopRequireDefault(require("@babel/helper-simple-access"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
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function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
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const assert = require("assert");
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function rewriteLiveReferences(programPath, metadata) {
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const imported = new Map();
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const exported = new Map();
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const requeueInParent = path => {
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programPath.requeue(path);
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};
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for (const [source, data] of metadata.source) {
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for (const [localName, importName] of data.imports) {
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imported.set(localName, [source, importName, null]);
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}
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for (const localName of data.importsNamespace) {
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imported.set(localName, [source, null, localName]);
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}
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}
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for (const [local, data] of metadata.local) {
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let exportMeta = exported.get(local);
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if (!exportMeta) {
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exportMeta = [];
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exported.set(local, exportMeta);
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}
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exportMeta.push(...data.names);
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}
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programPath.traverse(rewriteBindingInitVisitor, {
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metadata,
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requeueInParent,
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scope: programPath.scope,
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exported
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});
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(0, _helperSimpleAccess.default)(programPath, new Set([...Array.from(imported.keys()), ...Array.from(exported.keys())]));
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programPath.traverse(rewriteReferencesVisitor, {
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seen: new WeakSet(),
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metadata,
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requeueInParent,
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scope: programPath.scope,
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imported,
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exported,
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buildImportReference: ([source, importName, localName], identNode) => {
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const meta = metadata.source.get(source);
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if (localName) {
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if (meta.lazy) identNode = t.callExpression(identNode, []);
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return identNode;
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}
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let namespace = t.identifier(meta.name);
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if (meta.lazy) namespace = t.callExpression(namespace, []);
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const computed = metadata.stringSpecifiers.has(importName);
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return t.memberExpression(namespace, computed ? t.stringLiteral(importName) : t.identifier(importName), computed);
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}
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});
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}
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const rewriteBindingInitVisitor = {
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Scope(path) {
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path.skip();
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},
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ClassDeclaration(path) {
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const {
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requeueInParent,
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exported,
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metadata
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} = this;
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const {
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id
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} = path.node;
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if (!id) throw new Error("Expected class to have a name");
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const localName = id.name;
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const exportNames = exported.get(localName) || [];
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if (exportNames.length > 0) {
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const statement = t.expressionStatement(buildBindingExportAssignmentExpression(metadata, exportNames, t.identifier(localName)));
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statement._blockHoist = path.node._blockHoist;
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requeueInParent(path.insertAfter(statement)[0]);
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}
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},
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VariableDeclaration(path) {
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const {
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requeueInParent,
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exported,
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metadata
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} = this;
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Object.keys(path.getOuterBindingIdentifiers()).forEach(localName => {
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const exportNames = exported.get(localName) || [];
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if (exportNames.length > 0) {
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const statement = t.expressionStatement(buildBindingExportAssignmentExpression(metadata, exportNames, t.identifier(localName)));
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statement._blockHoist = path.node._blockHoist;
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requeueInParent(path.insertAfter(statement)[0]);
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}
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});
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}
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};
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const buildBindingExportAssignmentExpression = (metadata, exportNames, localExpr) => {
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return (exportNames || []).reduce((expr, exportName) => {
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const {
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stringSpecifiers
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} = metadata;
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const computed = stringSpecifiers.has(exportName);
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return t.assignmentExpression("=", t.memberExpression(t.identifier(metadata.exportName), computed ? t.stringLiteral(exportName) : t.identifier(exportName), computed), expr);
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}, localExpr);
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};
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const buildImportThrow = localName => {
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return _template.default.expression.ast`
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(function() {
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throw new Error('"' + '${localName}' + '" is read-only.');
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})()
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`;
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};
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const rewriteReferencesVisitor = {
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ReferencedIdentifier(path) {
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const {
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seen,
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buildImportReference,
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scope,
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imported,
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requeueInParent
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} = this;
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if (seen.has(path.node)) return;
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seen.add(path.node);
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const localName = path.node.name;
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const importData = imported.get(localName);
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if (importData) {
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const localBinding = path.scope.getBinding(localName);
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const rootBinding = scope.getBinding(localName);
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if (rootBinding !== localBinding) return;
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const ref = buildImportReference(importData, path.node);
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ref.loc = path.node.loc;
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if ((path.parentPath.isCallExpression({
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callee: path.node
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}) || path.parentPath.isOptionalCallExpression({
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callee: path.node
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}) || path.parentPath.isTaggedTemplateExpression({
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tag: path.node
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})) && t.isMemberExpression(ref)) {
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path.replaceWith(t.sequenceExpression([t.numericLiteral(0), ref]));
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} else if (path.isJSXIdentifier() && t.isMemberExpression(ref)) {
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const {
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object,
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property
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} = ref;
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path.replaceWith(t.JSXMemberExpression(t.JSXIdentifier(object.name), t.JSXIdentifier(property.name)));
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} else {
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path.replaceWith(ref);
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}
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requeueInParent(path);
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path.skip();
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}
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},
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AssignmentExpression: {
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exit(path) {
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const {
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scope,
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seen,
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imported,
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exported,
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requeueInParent,
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buildImportReference
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} = this;
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if (seen.has(path.node)) return;
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seen.add(path.node);
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const left = path.get("left");
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if (left.isMemberExpression()) return;
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if (left.isIdentifier()) {
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const localName = left.node.name;
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if (scope.getBinding(localName) !== path.scope.getBinding(localName)) {
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return;
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}
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const exportedNames = exported.get(localName);
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const importData = imported.get(localName);
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if ((exportedNames == null ? void 0 : exportedNames.length) > 0 || importData) {
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assert(path.node.operator === "=", "Path was not simplified");
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const assignment = path.node;
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if (importData) {
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assignment.left = buildImportReference(importData, assignment.left);
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assignment.right = t.sequenceExpression([assignment.right, buildImportThrow(localName)]);
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}
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path.replaceWith(buildBindingExportAssignmentExpression(this.metadata, exportedNames, assignment));
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requeueInParent(path);
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}
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} else {
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const ids = left.getOuterBindingIdentifiers();
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const programScopeIds = Object.keys(ids).filter(localName => scope.getBinding(localName) === path.scope.getBinding(localName));
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const id = programScopeIds.find(localName => imported.has(localName));
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if (id) {
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path.node.right = t.sequenceExpression([path.node.right, buildImportThrow(id)]);
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}
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const items = [];
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programScopeIds.forEach(localName => {
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const exportedNames = exported.get(localName) || [];
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if (exportedNames.length > 0) {
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items.push(buildBindingExportAssignmentExpression(this.metadata, exportedNames, t.identifier(localName)));
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}
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});
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if (items.length > 0) {
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let node = t.sequenceExpression(items);
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if (path.parentPath.isExpressionStatement()) {
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node = t.expressionStatement(node);
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node._blockHoist = path.parentPath.node._blockHoist;
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}
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const statement = path.insertAfter(node)[0];
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requeueInParent(statement);
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}
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}
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}
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},
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"ForOfStatement|ForInStatement"(path) {
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const {
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scope,
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node
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} = path;
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const {
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left
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} = node;
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const {
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exported,
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scope: programScope
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} = this;
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if (!t.isVariableDeclaration(left)) {
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let didTransform = false;
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const bodyPath = path.get("body");
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const loopBodyScope = bodyPath.scope;
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for (const name of Object.keys(t.getOuterBindingIdentifiers(left))) {
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if (exported.get(name) && programScope.getBinding(name) === scope.getBinding(name)) {
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didTransform = true;
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if (loopBodyScope.hasOwnBinding(name)) {
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loopBodyScope.rename(name);
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}
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}
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}
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if (!didTransform) {
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return;
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}
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const newLoopId = scope.generateUidIdentifierBasedOnNode(left);
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bodyPath.unshiftContainer("body", t.expressionStatement(t.assignmentExpression("=", left, newLoopId)));
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path.get("left").replaceWith(t.variableDeclaration("let", [t.variableDeclarator(t.cloneNode(newLoopId))]));
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scope.registerDeclaration(path.get("left"));
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}
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}
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}; |