From 7b23508e93f556e1f7fe678f13055d9a31817696 Mon Sep 17 00:00:00 2001
From: Vladimir Bolshutkin <vbolshutkin@gmail.com>
Date: Wed, 13 Mar 2019 09:50:05 +0200
Subject: [PATCH] TSLint: merge linterOptions to preserve original options from
 tslint.json. Support for excluding files and folders

---
 src/lint/lint-factory.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/lint/lint-factory.ts b/src/lint/lint-factory.ts
index 38f20052..c0f2ed0e 100644
--- a/src/lint/lint-factory.ts
+++ b/src/lint/lint-factory.ts
@@ -79,7 +79,10 @@ export function getFileNames(context: BuildContext, program: Program): string[]
  */
 export function getTsLintConfig(tsLintConfig: string, linterOptions?: LinterOptions): LinterConfig {
   const config = Configuration.loadConfigurationFromPath(tsLintConfig);
-  Object.assign(config, isObject(linterOptions) ? {linterOptions} : {});
+  const configLinterOptions = isObject(config.linterOptions) ? config.linterOptions : {}
+  const ionicLinterOptions = isObject(linterOptions) ? linterOptions : {}
+  Object.assign(configLinterOptions, ionicLinterOptions);
+  Object.assign(config, isObject(linterOptions) ? {linterOptions: configLinterOptions} : {});
   return config;
 }