From 6a707b87196300a5c0a5bb25dceb90b550c3a5ca Mon Sep 17 00:00:00 2001
From: Andrew Bradley <cspotcode@gmail.com>
Date: Sat, 31 Oct 2020 20:53:13 -0400
Subject: [PATCH] allow typeCheck cli flag to override transpileOnly tsconfig
 flag

---
 src/index.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/index.ts b/src/index.ts
index e2b759afc..491f7f4dc 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -447,7 +447,8 @@ export function create (rawOptions: CreateOptions = {}): Register {
 
   const readFile = options.readFile || ts.sys.readFile
   const fileExists = options.fileExists || ts.sys.fileExists
-  const transpileOnly = options.transpileOnly === true || options.typeCheck === false
+  // typeCheck can override transpileOnly, useful for CLI flag to override config file
+  const transpileOnly = options.transpileOnly === true && options.typeCheck !== true
   const transformers = options.transformers || undefined
   const ignoreDiagnostics = [
     6059, // "'rootDir' is expected to contain all source files."