You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
2.3 KiB
63 lines
2.3 KiB
3 years ago
|
"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;
|
||
|
|
}
|