Merge pull request #131 from aohua/aohua/support-namespace-export

Add support for NamespaceExport

Author: orta

src/__tests__/__snapshots__/exports.spec.ts.snap

@@ -7,6 +7,7 @@ declare export { module as newModule };
 declare export { GeneratorOptions } from \\"@babel/generator\\";
 declare export { GeneratorOptions as NewGeneratorOptions } from \\"@babel/generator\\";
 declare export * from \\"typescript\\"
+declare export * as t from \\"@babel/types\\";
 "
 `;
 

src/__tests__/exports.spec.ts

@@ -9,10 +9,10 @@ export { module as newModule }
 export { GeneratorOptions } from "@babel/generator";
 export { GeneratorOptions as NewGeneratorOptions } from "@babel/generator";
 export * from 'typescript';
+export * as t from "@babel/types";
 //enable when typescript supports
 //export traverse, { Visitor, NodePath } from "@babel/traverse";
-//export template from "@babel/template";
-//export * as t from "@babel/types";`;
+//export template from "@babel/template";`;
   const result = compiler.compileDefinitionString(ts, { quiet: true });
   expect(beautify(result)).toMatchSnapshot();
   expect(result).not.toBeValidFlowTypeDeclarations(); // cannot-resolve-module

src/nodes/export-declaration.ts

@@ -1,5 +1,6 @@
 import type { RawNode } from "./node";
 import type { Expression, ExportDeclaration as RawExport } from "typescript";
+import { isNamespaceExport } from "typescript";
 import * as printers from "../printers";
 import Node from "./node";
 
@@ -17,14 +18,17 @@ export default class ExportDeclaration extends Node<ExportDeclarationType> {
   print(): string {
     //TODO: move to printers
     if (this.raw.exportClause) {
-      // @ts-expect-error todo(flow->ts)
-      const elements = this.raw.exportClause.elements;
       const isTypeImport = this.raw.isTypeOnly;
 
       let specifier = "";
       if (this.raw.moduleSpecifier)
         specifier = `from '${this.raw.moduleSpecifier.text}';`;
 
+      if (isNamespaceExport(this.raw.exportClause)) {
+        return `declare export * as ${this.raw.exportClause.name.escapedText} ${specifier}\n`;
+      }
+      const elements = this.raw.exportClause.elements;
+
       const generateOutput = prefix => {
         return `${prefix} {
           ${elements.map(node => printers.node.printType(node))}

src/parse/ast.ts

@@ -37,6 +37,15 @@ export const parseNameFromNode = (node: RawNode): string => {
       names.push(parseNameFromNode(child));
     });
     return names.join(",");
+  } else if (ts.isIdentifier(node)) {
+    /*
+     * Parse name for NamespaceExport, please refer to the PR: https://github.com/joarwilk/flowgen/pull/131
+     * Based on the test, seems it only affects NamespaceExport
+     * May need someone to update the implementation later if there are any issues
+     */
+    if (node.escapedText && typeof node.escapedText === "string") {
+      return node.escapedText;
+    }
   }
   switch (node.kind) {
     case ts.SyntaxKind.FunctionDeclaration: