368 lines
11 KiB
JavaScript
368 lines
11 KiB
JavaScript
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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.rewriteModuleStatementsAndPrepareHeader = rewriteModuleStatementsAndPrepareHeader;
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exports.ensureStatementsHoisted = ensureStatementsHoisted;
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exports.wrapInterop = wrapInterop;
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exports.buildNamespaceInitStatements = buildNamespaceInitStatements;
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Object.defineProperty(exports, "isModule", {
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enumerable: true,
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get: function () {
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return _helperModuleImports.isModule;
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}
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});
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Object.defineProperty(exports, "rewriteThis", {
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enumerable: true,
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get: function () {
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return _rewriteThis.default;
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}
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});
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Object.defineProperty(exports, "hasExports", {
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enumerable: true,
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get: function () {
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return _normalizeAndLoadMetadata.hasExports;
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}
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});
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Object.defineProperty(exports, "isSideEffectImport", {
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enumerable: true,
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get: function () {
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return _normalizeAndLoadMetadata.isSideEffectImport;
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}
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});
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Object.defineProperty(exports, "getModuleName", {
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enumerable: true,
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get: function () {
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return _getModuleName.default;
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}
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});
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var t = _interopRequireWildcard(require("@babel/types"));
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var _template = _interopRequireDefault(require("@babel/template"));
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var _helperModuleImports = require("@babel/helper-module-imports");
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var _rewriteThis = _interopRequireDefault(require("./rewrite-this"));
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var _rewriteLiveReferences = _interopRequireDefault(require("./rewrite-live-references"));
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var _normalizeAndLoadMetadata = _interopRequireWildcard(require("./normalize-and-load-metadata"));
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var _getModuleName = _interopRequireDefault(require("./get-module-name"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
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function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
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const assert = require("assert");
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function rewriteModuleStatementsAndPrepareHeader(path, {
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loose,
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exportName,
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strict,
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allowTopLevelThis,
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strictMode,
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noInterop,
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lazy,
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esNamespaceOnly,
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constantReexports = loose,
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enumerableModuleMeta = loose
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}) {
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assert((0, _helperModuleImports.isModule)(path), "Cannot process module statements in a script");
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path.node.sourceType = "script";
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const meta = (0, _normalizeAndLoadMetadata.default)(path, exportName, {
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noInterop,
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initializeReexports: constantReexports,
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lazy,
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esNamespaceOnly
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});
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if (!allowTopLevelThis) {
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(0, _rewriteThis.default)(path);
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}
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(0, _rewriteLiveReferences.default)(path, meta);
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if (strictMode !== false) {
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const hasStrict = path.node.directives.some(directive => {
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return directive.value.value === "use strict";
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});
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if (!hasStrict) {
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path.unshiftContainer("directives", t.directive(t.directiveLiteral("use strict")));
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}
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}
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const headers = [];
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if ((0, _normalizeAndLoadMetadata.hasExports)(meta) && !strict) {
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headers.push(buildESModuleHeader(meta, enumerableModuleMeta));
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}
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const nameList = buildExportNameListDeclaration(path, meta);
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if (nameList) {
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meta.exportNameListName = nameList.name;
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headers.push(nameList.statement);
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}
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headers.push(...buildExportInitializationStatements(path, meta, constantReexports));
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return {
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meta,
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headers
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};
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}
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function ensureStatementsHoisted(statements) {
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statements.forEach(header => {
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header._blockHoist = 3;
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});
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}
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function wrapInterop(programPath, expr, type) {
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if (type === "none") {
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return null;
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}
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let helper;
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if (type === "default") {
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helper = "interopRequireDefault";
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} else if (type === "namespace") {
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helper = "interopRequireWildcard";
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} else {
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throw new Error(`Unknown interop: ${type}`);
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}
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return t.callExpression(programPath.hub.addHelper(helper), [expr]);
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}
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function buildNamespaceInitStatements(metadata, sourceMetadata, constantReexports = false) {
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const statements = [];
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let srcNamespace = t.identifier(sourceMetadata.name);
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if (sourceMetadata.lazy) srcNamespace = t.callExpression(srcNamespace, []);
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for (const localName of sourceMetadata.importsNamespace) {
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if (localName === sourceMetadata.name) continue;
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statements.push(_template.default.statement`var NAME = SOURCE;`({
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NAME: localName,
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SOURCE: t.cloneNode(srcNamespace)
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}));
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}
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if (constantReexports) {
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statements.push(...buildReexportsFromMeta(metadata, sourceMetadata, true));
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}
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for (const exportName of sourceMetadata.reexportNamespace) {
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statements.push((sourceMetadata.lazy ? _template.default.statement`
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Object.defineProperty(EXPORTS, "NAME", {
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enumerable: true,
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get: function() {
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return NAMESPACE;
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}
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});
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` : _template.default.statement`EXPORTS.NAME = NAMESPACE;`)({
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EXPORTS: metadata.exportName,
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NAME: exportName,
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NAMESPACE: t.cloneNode(srcNamespace)
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}));
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}
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if (sourceMetadata.reexportAll) {
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const statement = buildNamespaceReexport(metadata, t.cloneNode(srcNamespace), constantReexports);
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statement.loc = sourceMetadata.reexportAll.loc;
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statements.push(statement);
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}
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return statements;
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}
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const ReexportTemplate = {
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constant: _template.default.statement`EXPORTS.EXPORT_NAME = NAMESPACE_IMPORT;`,
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constantComputed: _template.default.statement`EXPORTS["EXPORT_NAME"] = NAMESPACE_IMPORT;`,
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spec: (0, _template.default)`
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Object.defineProperty(EXPORTS, "EXPORT_NAME", {
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enumerable: true,
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get: function() {
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return NAMESPACE_IMPORT;
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},
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});
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`
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};
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const buildReexportsFromMeta = (meta, metadata, constantReexports) => {
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const namespace = metadata.lazy ? t.callExpression(t.identifier(metadata.name), []) : t.identifier(metadata.name);
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const {
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stringSpecifiers
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} = meta;
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return Array.from(metadata.reexports, ([exportName, importName]) => {
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let NAMESPACE_IMPORT;
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if (stringSpecifiers.has(importName)) {
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NAMESPACE_IMPORT = t.memberExpression(t.cloneNode(namespace), t.stringLiteral(importName), true);
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} else {
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NAMESPACE_IMPORT = NAMESPACE_IMPORT = t.memberExpression(t.cloneNode(namespace), t.identifier(importName));
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}
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const astNodes = {
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EXPORTS: meta.exportName,
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EXPORT_NAME: exportName,
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NAMESPACE_IMPORT
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};
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if (constantReexports) {
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if (stringSpecifiers.has(exportName)) {
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return ReexportTemplate.constantComputed(astNodes);
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} else {
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return ReexportTemplate.constant(astNodes);
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}
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} else {
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return ReexportTemplate.spec(astNodes);
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}
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});
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};
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function buildESModuleHeader(metadata, enumerableModuleMeta = false) {
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return (enumerableModuleMeta ? _template.default.statement`
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EXPORTS.__esModule = true;
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` : _template.default.statement`
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Object.defineProperty(EXPORTS, "__esModule", {
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value: true,
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});
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`)({
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EXPORTS: metadata.exportName
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});
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}
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function buildNamespaceReexport(metadata, namespace, constantReexports) {
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return (constantReexports ? _template.default.statement`
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Object.keys(NAMESPACE).forEach(function(key) {
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if (key === "default" || key === "__esModule") return;
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VERIFY_NAME_LIST;
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if (key in EXPORTS && EXPORTS[key] === NAMESPACE[key]) return;
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EXPORTS[key] = NAMESPACE[key];
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});
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` : _template.default.statement`
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Object.keys(NAMESPACE).forEach(function(key) {
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if (key === "default" || key === "__esModule") return;
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VERIFY_NAME_LIST;
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if (key in EXPORTS && EXPORTS[key] === NAMESPACE[key]) return;
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Object.defineProperty(EXPORTS, key, {
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enumerable: true,
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get: function() {
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return NAMESPACE[key];
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},
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});
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});
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`)({
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NAMESPACE: namespace,
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EXPORTS: metadata.exportName,
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VERIFY_NAME_LIST: metadata.exportNameListName ? (0, _template.default)`
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if (Object.prototype.hasOwnProperty.call(EXPORTS_LIST, key)) return;
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`({
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EXPORTS_LIST: metadata.exportNameListName
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}) : null
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});
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}
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function buildExportNameListDeclaration(programPath, metadata) {
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const exportedVars = Object.create(null);
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for (const data of metadata.local.values()) {
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for (const name of data.names) {
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exportedVars[name] = true;
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}
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}
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let hasReexport = false;
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for (const data of metadata.source.values()) {
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for (const exportName of data.reexports.keys()) {
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exportedVars[exportName] = true;
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}
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for (const exportName of data.reexportNamespace) {
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exportedVars[exportName] = true;
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}
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hasReexport = hasReexport || data.reexportAll;
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}
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if (!hasReexport || Object.keys(exportedVars).length === 0) return null;
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const name = programPath.scope.generateUidIdentifier("exportNames");
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delete exportedVars.default;
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return {
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name: name.name,
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statement: t.variableDeclaration("var", [t.variableDeclarator(name, t.valueToNode(exportedVars))])
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};
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}
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function buildExportInitializationStatements(programPath, metadata, constantReexports = false) {
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const initStatements = [];
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const exportNames = [];
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for (const [localName, data] of metadata.local) {
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if (data.kind === "import") {} else if (data.kind === "hoisted") {
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initStatements.push(buildInitStatement(metadata, data.names, t.identifier(localName)));
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} else {
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exportNames.push(...data.names);
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}
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}
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for (const data of metadata.source.values()) {
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if (!constantReexports) {
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initStatements.push(...buildReexportsFromMeta(metadata, data, false));
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}
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for (const exportName of data.reexportNamespace) {
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exportNames.push(exportName);
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}
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}
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initStatements.push(...chunk(exportNames, 100).map(members => {
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return buildInitStatement(metadata, members, programPath.scope.buildUndefinedNode());
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}));
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return initStatements;
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}
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const InitTemplate = {
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computed: _template.default.expression`EXPORTS["NAME"] = VALUE`,
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default: _template.default.expression`EXPORTS.NAME = VALUE`
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};
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function buildInitStatement(metadata, exportNames, initExpr) {
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const {
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stringSpecifiers,
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exportName: EXPORTS
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} = metadata;
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return t.expressionStatement(exportNames.reduce((acc, exportName) => {
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const params = {
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EXPORTS,
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NAME: exportName,
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VALUE: acc
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};
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if (stringSpecifiers.has(exportName)) {
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return InitTemplate.computed(params);
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} else {
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return InitTemplate.default(params);
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}
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}, initExpr));
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}
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function chunk(array, size) {
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const chunks = [];
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for (let i = 0; i < array.length; i += size) {
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chunks.push(array.slice(i, i + size));
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}
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return chunks;
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}
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