fix: ts 4.5 compat (#84)

* ts 4.5 compat
* fix second usage of `createImportSpecifier`
Thanks to @Meligy for testing.

package.json

@@ -45,10 +45,12 @@
   },
   "dependencies": {
     "@apidevtools/swagger-parser": "^10.0.2",
+    "@types/semver": "^7.3.9",
     "commander": "^6.2.0",
     "glob-to-regexp": "^0.4.1",
     "oazapfts": "3.4.0",
     "prettier": "^2.2.1",
+    "semver": "^7.3.5",
     "swagger2openapi": "^7.0.4",
     "ts-morph": "^9.1.0",
     "typescript": "^4.1.2"

src/codegen.ts

@@ -1,4 +1,5 @@
 import * as ts from 'typescript';
+import semver from 'semver';
 const { factory } = ts;
 import { GenerationOptions } from './types';
 
@@ -16,6 +17,17 @@ export function generateStringLiteralArray(arr: string[]) {
   );
 }
 
+export function createImportSpecifier(
+  propertyName: ts.Identifier | undefined,
+  name: ts.Identifier
+): ts.ImportSpecifier {
+  if (semver.satisfies(ts.version, '>= 4.5'))
+    // @ts-ignore
+    return factory.createImportSpecifier(false, propertyName, name);
+  // @ts-ignore
+  return factory.createImportSpecifier(propertyName, name);
+}
+
 export function generateImportNode(pkg: string, namedImports: Record<string, string>, defaultImportName?: string) {
   return factory.createImportDeclaration(
     undefined,
@@ -25,7 +37,7 @@ export function generateImportNode(pkg: string, namedImports: Record<string, str
       defaultImportName !== undefined ? factory.createIdentifier(defaultImportName) : undefined,
       factory.createNamedImports(
         Object.entries(namedImports).map(([propertyName, name]) =>
-          factory.createImportSpecifier(
+          createImportSpecifier(
             name === propertyName ? undefined : factory.createIdentifier(propertyName),
             factory.createIdentifier(name)
           )

src/generators/import-node.ts

@@ -1,4 +1,5 @@
 import * as ts from 'typescript';
+import { createImportSpecifier } from '../codegen';
 
 const { factory } = ts;
 
@@ -13,7 +14,7 @@ export function generateImportNode(pkg: string, namedImports: Record<string, str
         Object.entries(namedImports)
           .filter((args) => args[1])
           .map(([propertyName, name]) =>
-            factory.createImportSpecifier(
+            createImportSpecifier(
               name === propertyName ? undefined : factory.createIdentifier(propertyName),
               factory.createIdentifier(name as string)
             )