added forge first version

services/forge/config.py

@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+
+"""Checks and sets default values for config.json before starting the container."""
+
+import json
+import re
+import os.path
+import sys
+
+DEFAULT_FILEPATH = '/data/config/forge/config.json'
+
+DEFAULT_OUTDIRS = {
+  "outdir_samples": "",
+  "outdir_txt2img_samples": "/output/txt2img",
+  "outdir_img2img_samples": "/output/img2img",
+  "outdir_extras_samples": "/output/extras",
+  "outdir_grids": "",
+  "outdir_txt2img_grids": "/output/txt2img-grids",
+  "outdir_img2img_grids": "/output/img2img-grids",
+  "outdir_save": "/output/saved",
+  "outdir_init_images": "/output/init-images",
+}
+RE_VALID_OUTDIR = re.compile(r"(^/output(/\.?[\w\-\_]+)+/?$)|(^\s?$)")
+
+DEFAULT_OTHER = {
+  "font": "DejaVuSans.ttf",
+}
+
+def dict_to_json_file(target_file: str, data: dict):
+  """Write dictionary to specified json file"""
+
+  with open(target_file, 'w') as f:
+    json.dump(data, f)
+
+def json_file_to_dict(config_file: str) -> dict|None:
+   """Load json file into a dictionary. Return None if file does not exist."""
+
+   if os.path.isfile(config_file):
+    with open(config_file, 'r') as f:
+      return json.load(f)
+   else:
+      return None
+
+def replace_if_invalid(value: str, replacement: str, pattern: str|re.Pattern[str]) -> str:
+  """Returns original value if valid, fallback value if invalid"""
+
+  if re.match(pattern, value):
+    return value
+  else:
+    return replacement
+
+def check_and_replace_config(config_file: str, target_file: str = None):
+  """Checks given file for invalid values. Replaces those with fallback values (default: overwrites file)."""
+
+  # Get current user config, or empty if file does not exists
+  data = json_file_to_dict(config_file) or {}
+
+  # Check and fix output directories
+  for k, def_val in DEFAULT_OUTDIRS.items():
+    if k not in data:
+      data[k] = def_val
+    else:
+      data[k] = replace_if_invalid(value=data[k], replacement=def_val, pattern=RE_VALID_OUTDIR)
+
+  # Check and fix other default settings
+  for k, def_val in DEFAULT_OTHER.items():
+    if k not in data:
+      data[k] = def_val
+
+  # Write results to file
+  dict_to_json_file(target_file or config_file, data)
+
+if __name__ == '__main__':
+  if len(sys.argv) > 1:
+    check_and_replace_config(*sys.argv[1:])
+  else:
+    check_and_replace_config(DEFAULT_FILEPATH)
+