From d9233c17d1a10f66d3fe7b2936d8c02a1104264a Mon Sep 17 00:00:00 2001
From: Josh Goldberg <josh@fullscreenmario.com>
Date: Sat, 6 Jul 2019 09:30:37 -0500
Subject: [PATCH] Used tsc --showConfig instead of cat for --typescript configs

---
 src/input/findTypeScriptConfiguration.test.ts | 6 ++++--
 src/input/findTypeScriptConfiguration.ts      | 2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/input/findTypeScriptConfiguration.test.ts b/src/input/findTypeScriptConfiguration.test.ts
index ac9e8c750..befb8d3bc 100644
--- a/src/input/findTypeScriptConfiguration.test.ts
+++ b/src/input/findTypeScriptConfiguration.test.ts
@@ -26,7 +26,7 @@ describe("findTypeScriptConfiguration", () => {
         await findTypeScriptConfiguration(dependencies, undefined);
 
         // Assert
-        expect(dependencies.exec).toHaveBeenLastCalledWith(`cat "./tsconfig.json"`);
+        expect(dependencies.exec).toHaveBeenLastCalledWith(`tsc --showConfig -p "./tsconfig.json"`);
     });
 
     it("includes a configuration file in the TypeScript command when one is provided", async () => {
@@ -38,7 +38,9 @@ describe("findTypeScriptConfiguration", () => {
         await findTypeScriptConfiguration(dependencies, config);
 
         // Assert
-        expect(dependencies.exec).toHaveBeenLastCalledWith(`cat "./custom/tsconfig.json"`);
+        expect(dependencies.exec).toHaveBeenLastCalledWith(
+            `tsc --showConfig -p "./custom/tsconfig.json"`,
+        );
     });
 
     it("applies TypeScript defaults when none are provided", async () => {
diff --git a/src/input/findTypeScriptConfiguration.ts b/src/input/findTypeScriptConfiguration.ts
index f0e33ca76..27badf3a0 100644
--- a/src/input/findTypeScriptConfiguration.ts
+++ b/src/input/findTypeScriptConfiguration.ts
@@ -19,7 +19,7 @@ export const findTypeScriptConfiguration = async (
 ): Promise<TypeScriptConfiguration | Error> => {
     const rawConfiguration = await findConfiguration<TypeScriptConfiguration>(
         dependencies.exec,
-        "cat",
+        "tsc --showConfig -p",
         config || "./tsconfig.json",
     );