0.2.0 - Mid migration

web/node_modules/@babel/helper-split-export-declaration/lib/index.js

@@ -0,0 +1,58 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = splitExportDeclaration;
+
+var t = require("@babel/types");
+
+function splitExportDeclaration(exportDeclaration) {
+  if (!exportDeclaration.isExportDeclaration()) {
+    throw new Error("Only export declarations can be split.");
+  }
+
+  const isDefault = exportDeclaration.isExportDefaultDeclaration();
+  const declaration = exportDeclaration.get("declaration");
+  const isClassDeclaration = declaration.isClassDeclaration();
+
+  if (isDefault) {
+    const standaloneDeclaration = declaration.isFunctionDeclaration() || 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 = t.cloneNode(id);
+      }
+    }
+
+    const updatedDeclaration = standaloneDeclaration ? declaration : t.variableDeclaration("var", [t.variableDeclarator(t.cloneNode(id), declaration.node)]);
+    const updatedExportDeclaration = t.exportNamedDeclaration(null, [t.exportSpecifier(t.cloneNode(id), t.identifier("default"))]);
+    exportDeclaration.insertAfter(updatedExportDeclaration);
+    exportDeclaration.replaceWith(updatedDeclaration);
+
+    if (needBindingRegistration) {
+      scope.registerDeclaration(exportDeclaration);
+    }
+
+    return exportDeclaration;
+  }
+
+  if (exportDeclaration.get("specifiers").length > 0) {
+    throw new Error("It doesn't make sense to split exported specifiers.");
+  }
+
+  const bindingIdentifiers = declaration.getOuterBindingIdentifiers();
+  const specifiers = Object.keys(bindingIdentifiers).map(name => {
+    return t.exportSpecifier(t.identifier(name), t.identifier(name));
+  });
+  const aliasDeclar = t.exportNamedDeclaration(null, specifiers);
+  exportDeclaration.insertAfter(aliasDeclar);
+  exportDeclaration.replaceWith(declaration.node);
+  return exportDeclaration;
+}