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.
dokku · Feb 4, 2023 · b376657 · b376657
1 parent e7eaeee
commit b376657
Showing 1 changed file with 3 additions and 0 deletions.
diff --git 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)