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