From bf4f5fd973a624325f420564652f58988be0e916 Mon Sep 17 00:00:00 2001
From: Sean Lilley <lilleyse@gmail.com>
Date: Thu, 22 Jul 2021 19:42:28 -0400
Subject: [PATCH] Fix coerce usage

---
 bin/obj2gltf.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/bin/obj2gltf.js b/bin/obj2gltf.js
index 40ffe76..1ca3f42 100644
--- a/bin/obj2gltf.js
+++ b/bin/obj2gltf.js
@@ -25,6 +25,9 @@ const argv = yargs
             type : 'string',
             demandOption : true,
             coerce : function (p) {
+                if (!defined(p)) {
+                    return undefined;
+                }
                 if (p.length === 0) {
                     throw new Error('Input path must be a file name');
                 }
@@ -36,6 +39,9 @@ const argv = yargs
             describe : 'Path of the converted glTF or glb file.',
             type : 'string',
             coerce : function (p) {
+                if (!defined(p)) {
+                    return undefined;
+                }
                 if (p.length === 0) {
                     throw new Error('Output path must be a file name');
                 }