export: Add wallpaper to export files,

pywal/__main__.py

@@ -95,11 +95,6 @@ def process_args(args):
     elif args.f:
         colors_plain = util.read_file_json(args.f)
 
-        # If wallpaper is unset, set it to "None"
-        if "wallpaper" not in colors_plain:
-            colors_plain["wallpaper"] = "None"
-            args.n = True
-
     # -i or -f
     if args.i or args.f:
         sequences.send_sequences(colors_plain, args.t)

pywal/util.py

@@ -54,6 +54,11 @@ def read_file_json(input_file):
     """Read data from a json file."""
     with open(input_file) as json_file:
         data = json.load(json_file)
+
+    # If wallpaper is unset, set it to "None"
+    if "wallpaper" not in data:
+        data["wallpaper"] = "None"
+
     return data
 
 

pywal/wallpaper.py

@@ -82,6 +82,9 @@ def set_desktop_wallpaper(desktop, img):
 
 def set_wallpaper(img):
     """Set the wallpaper."""
+    if not os.path.isfile(img):
+        return
+
     desktop = get_desktop_env()
 
     if desktop: