From c904efdddc042c93ae34ed27c38291661fcbb588 Mon Sep 17 00:00:00 2001
From: dubo-dubon-duponey <dubodubonduponey+github@pm.me>
Date: Sun, 29 Nov 2020 05:38:33 -0800
Subject: [PATCH] fix: workdir null behavior (#320)

Closes #319
Signed-off-by: dubo-dubon-duponey <dubodubonduponey+github@pm.me>
---
 docker/resource_docker_container.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/docker/resource_docker_container.go b/docker/resource_docker_container.go
index 8f730399..bed5a403 100644
--- a/docker/resource_docker_container.go
+++ b/docker/resource_docker_container.go
@@ -191,6 +191,13 @@ func resourceDockerContainer() *schema.Resource {
 				Type:     schema.TypeString,
 				Optional: true,
 				ForceNew: true,
+				DiffSuppressFunc: func(k, oldV, newV string, d *schema.ResourceData) bool {
+					// treat "" as a no-op, which is Docker's default behavior
+					if newV == "" {
+						newV = oldV
+					}
+					return oldV == newV
+				},
 			},
 			"remove_volumes": {
 				Type:     schema.TypeBool,