From b376657b41e40b6e6a185908352d5e40fdf71812 Mon Sep 17 00:00:00 2001
From: Brett Jones <blockloop@users.noreply.github.com>
Date: Sat, 4 Feb 2023 14:39:54 -0600
Subject: [PATCH] dokku_image: Detect unchanged docker images (#157)

`dokku git:from-image` command exits with a code of `1` if the image is already up to date.
This resulted in `dokku_image` not being idempotent.
---
 library/dokku_image.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/library/dokku_image.py b/library/dokku_image.py
index b38be37..bfe1198 100644
--- a/library/dokku_image.py
+++ b/library/dokku_image.py
@@ -94,6 +94,9 @@ def dokku_image(data):
             meta[
                 "error"
             ] = "Please upgrade to dokku>=0.24.0 in order to use the 'git:from-image' command."
+        elif "No changes detected, skipping git commit" in str(e.output):
+            is_error = False
+            has_changed = False
         else:
             meta["error"] = str(e.output)
         return (is_error, has_changed, meta)