fix: correctly restore type-only import/export names

src/helpers.ts

@@ -1,3 +1,5 @@
+import ts from "typescript";
+
 export const TS_EXTENSIONS = /\.([cm]ts|[tj]sx?)$/;
 
 export const DTS_EXTENSIONS = /\.d\.(c|m)?tsx?$/;
@@ -12,4 +14,8 @@ export function trimExtension(path: string) {
 
 export function getDeclarationId(path: string) {
   return path.replace(SUPPORTED_EXTENSIONS, ".d.ts")
+}
+
+export function parse(fileName: string, code: string): ts.SourceFile {
+  return ts.createSourceFile(fileName, code, ts.ScriptTarget.Latest, true);
 }

src/transform/Transformer.ts

@@ -1,8 +1,9 @@
 import type * as ESTree from "estree";
 import ts from "typescript";
-import { convertExpression, createIdentifier, createProgram, withStartEnd } from "./astHelpers.js";
+import { convertExpression, convertTypeOnlyHintStatement, createIdentifier, createProgram, withStartEnd } from "./astHelpers.js";
 import { DeclarationScope } from "./DeclarationScope.js";
 import { UnsupportedSyntaxError } from "./errors.js";
+import { parseTypeOnlyName } from "./TypeOnlyFixer.js";
 
 type ESTreeImports = ESTree.ImportDeclaration["specifiers"];
 
@@ -165,6 +166,11 @@ class Transformer {
   }
 
   convertTypeAliasDeclaration(node: ts.TypeAliasDeclaration) {
+    if(parseTypeOnlyName(node.name.text).isTypeOnly) {
+      this.pushStatement(convertTypeOnlyHintStatement(node))
+      return
+    }
+
     const scope = this.createDeclaration(node, node.name);
 
     const typeVariables = scope.convertTypeParameters(node.typeParameters);