chore: Support config schema extract without installation

build_helpers/extract_config_json_schema.py

@@ -1,13 +1,25 @@
 """Script to extract the configuration json schema from config_schema.py file."""
 
+import sys
 from pathlib import Path
 
 import rapidjson
 
-from freqtrade.configuration.config_schema import CONF_SCHEMA
-
 
 def extract_config_json_schema():
+    try:
+        # Try to import from the installed package
+        from freqtrade.configuration.config_schema import CONF_SCHEMA
+    except ImportError:
+        # If freqtrade is not installed, add the parent directory to sys.path
+        # to import directly from the source
+        script_dir = Path(__file__).parent
+        freqtrade_dir = script_dir.parent
+        sys.path.insert(0, str(freqtrade_dir))
+
+        # Now try to import from the source
+        from freqtrade.configuration.config_schema import CONF_SCHEMA
+
     schema_filename = Path(__file__).parent / "schema.json"
     with schema_filename.open("w") as f:
         rapidjson.dump(CONF_SCHEMA, f, indent=2)