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"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 _core = require("@babel/core"); |
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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, wrapReference) { |
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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(rewriteBindingInitVisitor, rewriteBindingInitVisitorState); |
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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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meta.referenced = true; |
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if (localName) { |
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if (meta.wrap) { |
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var _wrapReference; |
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identNode = (_wrapReference = wrapReference(identNode, meta.wrap)) != null ? _wrapReference : identNode; |
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} |
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return identNode; |
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} |
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let namespace = _core.types.identifier(meta.name); |
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if (meta.wrap) { |
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var _wrapReference2; |
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namespace = (_wrapReference2 = wrapReference(namespace, meta.wrap)) != null ? _wrapReference2 : namespace; |
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} |
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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 _core.types.memberExpression(namespace, computed ? _core.types.stringLiteral(importName) : _core.types.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 = _core.types.expressionStatement(buildBindingExportAssignmentExpression(metadata, exportNames, _core.types.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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const isVar = path.node.kind === "var"; |
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for (const decl of path.get("declarations")) { |
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const { |
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id |
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} = decl.node; |
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let { |
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init |
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} = decl.node; |
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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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if (!init) { |
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if (isVar) { |
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continue; |
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} else { |
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init = path.scope.buildUndefinedNode(); |
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} |
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} |
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decl.node.init = buildBindingExportAssignmentExpression(metadata, exported.get(id.name), init, path.scope); |
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requeueInParent(decl.get("init")); |
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} else { |
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for (const localName of Object.keys(decl.getOuterBindingIdentifiers())) { |
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if (exported.has(localName)) { |
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const statement = _core.types.expressionStatement(buildBindingExportAssignmentExpression(metadata, exported.get(localName), _core.types.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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} |
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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 _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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}, localExpr); |
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}; |
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const buildImportThrow = localName => { |
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return _core.template.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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})) && _core.types.isMemberExpression(ref)) { |
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path.replaceWith(_core.types.sequenceExpression([_core.types.numericLiteral(0), ref])); |
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} else if (path.isJSXIdentifier() && _core.types.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(_core.types.jsxMemberExpression(_core.types.jsxIdentifier(object.name), _core.types.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(_core.types.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, _core.types.cloneNode(update), path.scope)); |
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} else { |
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const ref = scope.generateDeclaredUidIdentifier(localName); |
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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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} |
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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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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 = _core.types.sequenceExpression([assignment.right, buildImportThrow(localName)]); |
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} |
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const { |
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operator |
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} = assignment; |
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let newExpr; |
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if (operator === "=") { |
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newExpr = assignment; |
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} else if (operator === "&&=" || operator === "||=" || operator === "??=") { |
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newExpr = _core.types.assignmentExpression("=", assignment.left, _core.types.logicalExpression(operator.slice(0, -1), _core.types.cloneNode(assignment.left), assignment.right)); |
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} else { |
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newExpr = _core.types.assignmentExpression("=", assignment.left, _core.types.binaryExpression(operator.slice(0, -1), _core.types.cloneNode(assignment.left), assignment.right)); |
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} |
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path.replaceWith(buildBindingExportAssignmentExpression(this.metadata, exportedNames, newExpr, path.scope)); |
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requeueInParent(path); |
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path.skip(); |
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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 = _core.types.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, _core.types.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 = _core.types.sequenceExpression(items); |
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if (path.parentPath.isExpressionStatement()) { |
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node = _core.types.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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ForXStatement(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 (!_core.types.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(_core.types.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(_core.types.variableDeclaration("let", [_core.types.variableDeclarator(_core.types.cloneNode(newLoopId))])); |
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scope.registerDeclaration(path.get("left")); |
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if (didTransformExport) { |
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bodyPath.unshiftContainer("body", _core.types.expressionStatement(_core.types.assignmentExpression("=", left, newLoopId))); |
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} |
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if (importConstViolationName) { |
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bodyPath.unshiftContainer("body", _core.types.expressionStatement(buildImportThrow(importConstViolationName))); |
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} |
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} |
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} |
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}; |
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