"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 _assert = require("assert");
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var _t = require("@babel/types");
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var _template = require("@babel/template");
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var _helperSimpleAccess = require("@babel/helper-simple-access");
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const {
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assignmentExpression,
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callExpression,
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cloneNode,
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expressionStatement,
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getOuterBindingIdentifiers,
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identifier,
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isMemberExpression,
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isVariableDeclaration,
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jsxIdentifier,
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jsxMemberExpression,
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memberExpression,
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numericLiteral,
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sequenceExpression,
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stringLiteral,
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variableDeclaration,
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variableDeclarator
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} = _t;
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function isInType(path) {
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do {
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switch (path.parent.type) {
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case "TSTypeAnnotation":
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case "TSTypeAliasDeclaration":
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case "TSTypeReference":
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case "TypeAnnotation":
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case "TypeAlias":
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return true;
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case "ExportSpecifier":
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return path.parentPath.parent.exportKind === "type";
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default:
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if (path.parentPath.isStatement() || path.parentPath.isExpression()) {
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return false;
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}
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}
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} while (path = path.parentPath);
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}
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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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const rewriteBindingInitVisitorState = {
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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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programPath.traverse(
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rewriteBindingInitVisitor, rewriteBindingInitVisitorState);
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(0, _helperSimpleAccess.default)(programPath,
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new Set([...Array.from(imported.keys()), ...Array.from(exported.keys())]), false);
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const rewriteReferencesVisitorState = {
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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) {
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identNode = callExpression(
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identNode, []);
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}
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return identNode;
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}
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let namespace = identifier(meta.name);
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if (meta.lazy) namespace = callExpression(namespace, []);
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if (importName === "default" && meta.interop === "node-default") {
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return namespace;
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}
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const computed = metadata.stringSpecifiers.has(importName);
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return memberExpression(namespace, computed ? stringLiteral(importName) : identifier(importName), computed);
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}
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};
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programPath.traverse(rewriteReferencesVisitor, rewriteReferencesVisitorState);
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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 = expressionStatement(
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buildBindingExportAssignmentExpression(metadata, exportNames, identifier(localName), path.scope));
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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 = expressionStatement(
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buildBindingExportAssignmentExpression(metadata, exportNames, identifier(localName), path.scope));
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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, scope) => {
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const exportsObjectName = metadata.exportName;
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for (let currentScope = scope; currentScope != null; currentScope = currentScope.parent) {
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if (currentScope.hasOwnBinding(exportsObjectName)) {
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currentScope.rename(exportsObjectName);
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}
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}
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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 assignmentExpression("=", memberExpression(identifier(exportsObjectName), computed ? stringLiteral(exportName) : 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('"' + '${localName}' + '" is read-only.');
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})()
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`;
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};
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const rewriteReferencesVisitor = {
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ReferencedIdentifier(path) {
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const {
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seen,
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buildImportReference,
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scope,
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imported,
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requeueInParent
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} = this;
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if (seen.has(path.node)) return;
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seen.add(path.node);
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const localName = path.node.name;
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const importData = imported.get(localName);
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if (importData) {
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if (isInType(path)) {
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throw path.buildCodeFrameError(`Cannot transform the imported binding "${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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}
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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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})) && isMemberExpression(ref)) {
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path.replaceWith(sequenceExpression([numericLiteral(0), ref]));
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} else if (path.isJSXIdentifier() && 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(jsxMemberExpression(
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jsxIdentifier(object.name),
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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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UpdateExpression(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 arg = path.get("argument");
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if (arg.isMemberExpression()) return;
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const update = path.node;
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if (arg.isIdentifier()) {
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const localName = arg.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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if (importData) {
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path.replaceWith(assignmentExpression(update.operator[0] + "=", buildImportReference(importData, arg.node), buildImportThrow(localName)));
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} else if (update.prefix) {
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path.replaceWith(buildBindingExportAssignmentExpression(this.metadata, exportedNames, cloneNode(update), path.scope));
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} else {
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const ref = scope.generateDeclaredUidIdentifier(localName);
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path.replaceWith(sequenceExpression([assignmentExpression("=", cloneNode(ref), cloneNode(update)), buildBindingExportAssignmentExpression(this.metadata, exportedNames, identifier(localName), path.scope), cloneNode(ref)]));
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}
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}
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}
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requeueInParent(path);
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path.skip();
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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, left.node);
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assignment.right = sequenceExpression([assignment.right, buildImportThrow(localName)]);
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}
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path.replaceWith(buildBindingExportAssignmentExpression(this.metadata, exportedNames, assignment, path.scope));
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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 = 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, identifier(localName), path.scope));
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}
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});
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if (items.length > 0) {
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let node = sequenceExpression(items);
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if (path.parentPath.isExpressionStatement()) {
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node = 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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imported,
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scope: programScope
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} = this;
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if (!isVariableDeclaration(left)) {
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let didTransformExport = false,
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importConstViolationName;
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const loopBodyScope = path.get("body").scope;
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for (const name of Object.keys(getOuterBindingIdentifiers(left))) {
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if (programScope.getBinding(name) === scope.getBinding(name)) {
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if (exported.has(name)) {
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didTransformExport = 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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if (imported.has(name) && !importConstViolationName) {
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importConstViolationName = name;
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}
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}
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}
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if (!didTransformExport && !importConstViolationName) {
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return;
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}
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path.ensureBlock();
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const bodyPath = path.get("body");
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const newLoopId = scope.generateUidIdentifierBasedOnNode(left);
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path.get("left").replaceWith(variableDeclaration("let", [variableDeclarator(cloneNode(newLoopId))]));
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scope.registerDeclaration(path.get("left"));
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if (didTransformExport) {
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bodyPath.unshiftContainer("body", expressionStatement(assignmentExpression("=", left, newLoopId)));
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}
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if (importConstViolationName) {
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bodyPath.unshiftContainer("body", expressionStatement(buildImportThrow(importConstViolationName)));
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}
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}
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}
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};
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//# sourceMappingURL=rewrite-live-references.js.map
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