68 lines
2.7 KiB
JavaScript
68 lines
2.7 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.default = splitExportDeclaration;
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function t() {
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const data = _interopRequireWildcard(require("@babel/types"));
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t = function () {
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return data;
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};
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return data;
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}
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function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
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function splitExportDeclaration(exportDeclaration) {
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if (!exportDeclaration.isExportDeclaration()) {
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throw new Error("Only export declarations can be splitted.");
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}
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const isDefault = exportDeclaration.isExportDefaultDeclaration();
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const declaration = exportDeclaration.get("declaration");
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const isClassDeclaration = declaration.isClassDeclaration();
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if (isDefault) {
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const standaloneDeclaration = declaration.isFunctionDeclaration() || isClassDeclaration;
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const scope = declaration.isScope() ? declaration.scope.parent : declaration.scope;
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let id = declaration.node.id;
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let needBindingRegistration = false;
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if (!id) {
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needBindingRegistration = true;
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id = scope.generateUidIdentifier("default");
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if (standaloneDeclaration || declaration.isFunctionExpression() || declaration.isClassExpression()) {
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declaration.node.id = t().cloneNode(id);
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}
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}
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const updatedDeclaration = standaloneDeclaration ? declaration : t().variableDeclaration("var", [t().variableDeclarator(t().cloneNode(id), declaration.node)]);
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const updatedExportDeclaration = t().exportNamedDeclaration(null, [t().exportSpecifier(t().cloneNode(id), t().identifier("default"))]);
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exportDeclaration.insertAfter(updatedExportDeclaration);
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exportDeclaration.replaceWith(updatedDeclaration);
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if (needBindingRegistration) {
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scope.registerDeclaration(exportDeclaration);
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}
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return exportDeclaration;
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}
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if (exportDeclaration.get("specifiers").length > 0) {
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throw new Error("It doesn't make sense to split exported specifiers.");
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}
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const bindingIdentifiers = declaration.getOuterBindingIdentifiers();
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const specifiers = Object.keys(bindingIdentifiers).map(name => {
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return t().exportSpecifier(t().identifier(name), t().identifier(name));
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});
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const aliasDeclar = t().exportNamedDeclaration(null, specifiers);
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exportDeclaration.insertAfter(aliasDeclar);
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exportDeclaration.replaceWith(declaration.node);
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return exportDeclaration;
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}
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