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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = splitExportDeclaration;
var _t = require("@babel/types");
const {
cloneNode,
exportNamedDeclaration,
exportSpecifier,
identifier,
variableDeclaration,
variableDeclarator
} = _t;
function splitExportDeclaration(exportDeclaration) {
if (!exportDeclaration.isExportDeclaration() || exportDeclaration.isExportAllDeclaration()) {
throw new Error("Only default and named export declarations can be split.");
}
if (exportDeclaration.isExportDefaultDeclaration()) {
const declaration = exportDeclaration.get("declaration");
const standaloneDeclaration = declaration.isFunctionDeclaration() || declaration.isClassDeclaration();
const scope = declaration.isScope() ? declaration.scope.parent : declaration.scope;
let id = declaration.node.id;
let needBindingRegistration = false;
if (!id) {
needBindingRegistration = true;
id = scope.generateUidIdentifier("default");
if (standaloneDeclaration || declaration.isFunctionExpression() || declaration.isClassExpression()) {
declaration.node.id = cloneNode(id);
}
}
const updatedDeclaration = standaloneDeclaration ? declaration.node : variableDeclaration("var", [variableDeclarator(cloneNode(id), declaration.node)]);
const updatedExportDeclaration = exportNamedDeclaration(null, [exportSpecifier(cloneNode(id), identifier("default"))]);
exportDeclaration.insertAfter(updatedExportDeclaration);
exportDeclaration.replaceWith(updatedDeclaration);
if (needBindingRegistration) {
scope.registerDeclaration(exportDeclaration);
}
return exportDeclaration;
} else if (exportDeclaration.get("specifiers").length > 0) {
throw new Error("It doesn't make sense to split exported specifiers.");
}
const declaration = exportDeclaration.get("declaration");
const bindingIdentifiers = declaration.getOuterBindingIdentifiers();
const specifiers = Object.keys(bindingIdentifiers).map(name => {
return exportSpecifier(identifier(name), identifier(name));
});
const aliasDeclar = exportNamedDeclaration(null, specifiers);
exportDeclaration.insertAfter(aliasDeclar);
exportDeclaration.replaceWith(declaration.node);
return exportDeclaration;
}