globals: More config error detection

Author: jschuh

README.md

@@ -89,7 +89,7 @@ section.
 > macros can cause all sorts of weird and frustrating problems. 
 
 > **Note:** If you have a `[homing_override]` section you will need to update
-> any `G28` commands in that section to use to `G28.6245197` instead (which is
+> any `G28` commands in the gcode part to use `G28.6245197` instead (which is
 > the renamed version of Klipper's built-in `G28`). Failure to do this will
 > cause `G28` commands to error out with the message ***Macro G28 called
 > recursively***.
@@ -602,6 +602,12 @@ arguments.
 
 * `O` - Omits axes from the homing procedure if they are already homed.
 
+> **Note:** If you have a `[homing_override]` section you will need to update
+> any `G28` commands in the gcode part to use `G28.6245197` instead (which is
+> the renamed version of Klipper's built-in `G28`). Failure to do this will
+> cause `G28` commands to error out with the message ***Macro G28 called
+> recursively***.
+
 ### Layer Triggers
 
 Provides the capability to run user-specified g-code commands at arbitrary layer

globals.cfg

@@ -106,10 +106,11 @@ gcode:
     {% endif %}
   {% endfor %}
   {% if output %}
-    { action_emergency_stop(
+    { action_emergency_stop((
         "required printer.cfg section(s) missing:\n"
         ~ output | join("\n")) ~
-        "See readme: https://github.com/jschuh/" }
+        "See readme: https://github.com/jschuh/klipper-macros\x23klipper-setup")
+    }
   {% endif %}
 
   # Bed leveling behavior is based on config options.
@@ -158,6 +159,18 @@ gcode:
       {action_raise_error("%s is not a valid type for _KM_OPTIONS."|format(k))}
     {% endif %}
   {% endfor %}
+
+  {% if "homing_override" in printer.configfile.config %}
+    {% for l in printer.configfile.config.homing_override.gcode.split("\n") %}
+        {% if " g28 " in (" " ~ l.split("\x23")[0].split(";")[0]|lower ~ " ") %}
+          { action_raise_error(
+              "G28 in [homing_override] gcode. Replace with G28.6245197 to "
+              "fix recursive macro call.\n"
+              "See readme: https://github.com/jschuh/klipper-macros\x23g28") }
+        {% endif %}
+    {% endfor %}
+  {% endif %}
+
   M400
 
 [delayed_gcode INIT_GLOBALS]