add an option to copy config from one of models in checkpoint merger

modules/extras.py

@@ -3,6 +3,7 @@ import math
 import os
 import sys
 import traceback
+import shutil
 
 import numpy as np
 from PIL import Image
@@ -248,7 +249,32 @@ def run_pnginfo(image):
     return '', geninfo, info
 
 
-def run_modelmerger(primary_model_name, secondary_model_name, tertiary_model_name, interp_method, multiplier, save_as_half, custom_name, checkpoint_format):
+def create_config(ckpt_result, config_source, a, b, c):
+    def config(x):
+        return sd_models.find_checkpoint_config(x) if x else None
+
+    if config_source == 0:
+        cfg = config(a) or config(b) or config(c)
+    elif config_source == 1:
+        cfg = config(b)
+    elif config_source == 2:
+        cfg = config(c)
+    else:
+        cfg = None
+
+    if cfg is None:
+        return
+
+    filename, _ = os.path.splitext(ckpt_result)
+    checkpoint_filename = filename + ".yaml"
+
+    print("Copying config:")
+    print("   from:", cfg)
+    print("     to:", checkpoint_filename)
+    shutil.copyfile(cfg, checkpoint_filename)
+
+
+def run_modelmerger(primary_model_name, secondary_model_name, tertiary_model_name, interp_method, multiplier, save_as_half, custom_name, checkpoint_format, config_source):
     shared.state.begin()
     shared.state.job = 'model-merge'
 
@@ -356,6 +382,8 @@ def run_modelmerger(primary_model_name, secondary_model_name, tertiary_model_nam
 
     sd_models.list_models()
 
+    create_config(output_modelname, config_source, primary_model_info, secondary_model_info, tertiary_model_info)
+
     print("Checkpoint saved.")
     shared.state.textinfo = "Checkpoint saved to " + output_modelname
     shared.state.end()