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346 lines
10 KiB
346 lines
10 KiB
"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.hasExports = hasExports;
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exports.isSideEffectImport = isSideEffectImport;
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exports.default = normalizeModuleAndLoadMetadata;
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var _path = require("path");
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var _helperSplitExportDeclaration = _interopRequireDefault(require("@babel/helper-split-export-declaration"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function hasExports(metadata) {
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return metadata.hasExports;
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}
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function isSideEffectImport(source) {
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return source.imports.size === 0 && source.importsNamespace.size === 0 && source.reexports.size === 0 && source.reexportNamespace.size === 0 && !source.reexportAll;
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}
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function normalizeModuleAndLoadMetadata(programPath, exportName, {
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noInterop = false,
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loose = false,
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lazy = false,
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esNamespaceOnly = false
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} = {}) {
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if (!exportName) {
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exportName = programPath.scope.generateUidIdentifier("exports").name;
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}
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nameAnonymousExports(programPath);
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const {
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local,
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source,
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hasExports
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} = getModuleMetadata(programPath, {
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loose,
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lazy
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});
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removeModuleDeclarations(programPath);
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for (const [, metadata] of source) {
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if (metadata.importsNamespace.size > 0) {
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metadata.name = metadata.importsNamespace.values().next().value;
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}
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if (noInterop) metadata.interop = "none";else if (esNamespaceOnly) {
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if (metadata.interop === "namespace") {
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metadata.interop = "default";
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}
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}
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}
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return {
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exportName,
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exportNameListName: null,
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hasExports,
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local,
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source
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};
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}
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function getModuleMetadata(programPath, {
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loose,
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lazy
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}) {
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const localData = getLocalExportMetadata(programPath, loose);
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const sourceData = new Map();
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const getData = sourceNode => {
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const source = sourceNode.value;
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let data = sourceData.get(source);
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if (!data) {
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data = {
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name: programPath.scope.generateUidIdentifier((0, _path.basename)(source, (0, _path.extname)(source))).name,
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interop: "none",
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loc: null,
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imports: new Map(),
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importsNamespace: new Set(),
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reexports: new Map(),
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reexportNamespace: new Set(),
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reexportAll: null,
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lazy: false
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};
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sourceData.set(source, data);
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}
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return data;
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};
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let hasExports = false;
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programPath.get("body").forEach(child => {
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if (child.isImportDeclaration()) {
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const data = getData(child.node.source);
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if (!data.loc) data.loc = child.node.loc;
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child.get("specifiers").forEach(spec => {
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if (spec.isImportDefaultSpecifier()) {
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const localName = spec.get("local").node.name;
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data.imports.set(localName, "default");
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const reexport = localData.get(localName);
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if (reexport) {
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localData.delete(localName);
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reexport.names.forEach(name => {
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data.reexports.set(name, "default");
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});
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}
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} else if (spec.isImportNamespaceSpecifier()) {
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const localName = spec.get("local").node.name;
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data.importsNamespace.add(localName);
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const reexport = localData.get(localName);
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if (reexport) {
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localData.delete(localName);
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reexport.names.forEach(name => {
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data.reexportNamespace.add(name);
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});
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}
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} else if (spec.isImportSpecifier()) {
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const importName = spec.get("imported").node.name;
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const localName = spec.get("local").node.name;
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data.imports.set(localName, importName);
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const reexport = localData.get(localName);
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if (reexport) {
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localData.delete(localName);
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reexport.names.forEach(name => {
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data.reexports.set(name, importName);
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});
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}
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}
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});
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} else if (child.isExportAllDeclaration()) {
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hasExports = true;
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const data = getData(child.node.source);
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if (!data.loc) data.loc = child.node.loc;
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data.reexportAll = {
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loc: child.node.loc
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};
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} else if (child.isExportNamedDeclaration() && child.node.source) {
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hasExports = true;
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const data = getData(child.node.source);
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if (!data.loc) data.loc = child.node.loc;
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child.get("specifiers").forEach(spec => {
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if (!spec.isExportSpecifier()) {
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throw spec.buildCodeFrameError("Unexpected export specifier type");
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}
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const importName = spec.get("local").node.name;
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const exportName = spec.get("exported").node.name;
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data.reexports.set(exportName, importName);
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if (exportName === "__esModule") {
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throw exportName.buildCodeFrameError('Illegal export "__esModule".');
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}
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});
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} else if (child.isExportNamedDeclaration() || child.isExportDefaultDeclaration()) {
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hasExports = true;
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}
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});
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for (const metadata of sourceData.values()) {
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let needsDefault = false;
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let needsNamed = false;
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if (metadata.importsNamespace.size > 0) {
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needsDefault = true;
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needsNamed = true;
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}
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if (metadata.reexportAll) {
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needsNamed = true;
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}
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for (const importName of metadata.imports.values()) {
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if (importName === "default") needsDefault = true;else needsNamed = true;
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}
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for (const importName of metadata.reexports.values()) {
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if (importName === "default") needsDefault = true;else needsNamed = true;
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}
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if (needsDefault && needsNamed) {
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metadata.interop = "namespace";
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} else if (needsDefault) {
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metadata.interop = "default";
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}
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}
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for (const [source, metadata] of sourceData) {
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if (lazy !== false && !(isSideEffectImport(metadata) || metadata.reexportAll)) {
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if (lazy === true) {
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metadata.lazy = !/\./.test(source);
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} else if (Array.isArray(lazy)) {
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metadata.lazy = lazy.indexOf(source) !== -1;
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} else if (typeof lazy === "function") {
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metadata.lazy = lazy(source);
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} else {
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throw new Error(`.lazy must be a boolean, string array, or function`);
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}
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}
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}
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return {
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hasExports,
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local: localData,
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source: sourceData
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};
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}
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function getLocalExportMetadata(programPath, loose) {
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const bindingKindLookup = new Map();
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programPath.get("body").forEach(child => {
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let kind;
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if (child.isImportDeclaration()) {
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kind = "import";
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} else {
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if (child.isExportDefaultDeclaration()) child = child.get("declaration");
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if (child.isExportNamedDeclaration()) {
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if (child.node.declaration) {
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child = child.get("declaration");
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} else if (loose && child.node.source && child.get("source").isStringLiteral()) {
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child.node.specifiers.forEach(specifier => {
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bindingKindLookup.set(specifier.local.name, "block");
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});
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return;
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}
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}
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if (child.isFunctionDeclaration()) {
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kind = "hoisted";
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} else if (child.isClassDeclaration()) {
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kind = "block";
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} else if (child.isVariableDeclaration({
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kind: "var"
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})) {
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kind = "var";
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} else if (child.isVariableDeclaration()) {
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kind = "block";
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} else {
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return;
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}
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}
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Object.keys(child.getOuterBindingIdentifiers()).forEach(name => {
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bindingKindLookup.set(name, kind);
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});
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});
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const localMetadata = new Map();
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const getLocalMetadata = idPath => {
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const localName = idPath.node.name;
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let metadata = localMetadata.get(localName);
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if (!metadata) {
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const kind = bindingKindLookup.get(localName);
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if (kind === undefined) {
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throw idPath.buildCodeFrameError(`Exporting local "${localName}", which is not declared.`);
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}
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metadata = {
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names: [],
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kind
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};
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localMetadata.set(localName, metadata);
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}
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return metadata;
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};
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programPath.get("body").forEach(child => {
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if (child.isExportNamedDeclaration() && (loose || !child.node.source)) {
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if (child.node.declaration) {
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const declaration = child.get("declaration");
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const ids = declaration.getOuterBindingIdentifierPaths();
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Object.keys(ids).forEach(name => {
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if (name === "__esModule") {
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throw declaration.buildCodeFrameError('Illegal export "__esModule".');
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}
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getLocalMetadata(ids[name]).names.push(name);
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});
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} else {
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child.get("specifiers").forEach(spec => {
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const local = spec.get("local");
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const exported = spec.get("exported");
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if (exported.node.name === "__esModule") {
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throw exported.buildCodeFrameError('Illegal export "__esModule".');
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}
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getLocalMetadata(local).names.push(exported.node.name);
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});
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}
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} else if (child.isExportDefaultDeclaration()) {
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const declaration = child.get("declaration");
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if (declaration.isFunctionDeclaration() || declaration.isClassDeclaration()) {
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getLocalMetadata(declaration.get("id")).names.push("default");
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} else {
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throw declaration.buildCodeFrameError("Unexpected default expression export.");
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}
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}
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});
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return localMetadata;
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}
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function nameAnonymousExports(programPath) {
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programPath.get("body").forEach(child => {
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if (!child.isExportDefaultDeclaration()) return;
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(0, _helperSplitExportDeclaration.default)(child);
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});
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}
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function removeModuleDeclarations(programPath) {
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programPath.get("body").forEach(child => {
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if (child.isImportDeclaration()) {
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child.remove();
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} else if (child.isExportNamedDeclaration()) {
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if (child.node.declaration) {
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child.node.declaration._blockHoist = child.node._blockHoist;
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child.replaceWith(child.node.declaration);
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} else {
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child.remove();
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}
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} else if (child.isExportDefaultDeclaration()) {
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const declaration = child.get("declaration");
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if (declaration.isFunctionDeclaration() || declaration.isClassDeclaration()) {
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declaration._blockHoist = child.node._blockHoist;
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child.replaceWith(declaration);
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} else {
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throw declaration.buildCodeFrameError("Unexpected default expression export.");
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}
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} else if (child.isExportAllDeclaration()) {
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child.remove();
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}
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});
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}
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