Force XDG_CONFIG_HOME/HOME to repo .streamlit and create config for Spaces

streamlit_app.py

@@ -1,22 +1,25 @@
 # streamlit_app.py  (place at repo root)
 """
 Launcher for Hugging Face Spaces / Streamlit:
- - ensure Streamlit config/metrics are written to a writable location
+ - force XDG_CONFIG_HOME/HOME to a writable folder in the repo
  - create a minimal .streamlit/config.toml if missing
  - run the actual app (src/app.py) as __main__
 """
 import os
 from pathlib import Path
 import runpy
+import sys
 
 ROOT = Path(__file__).parent.resolve()
 STREAMLIT_DIR = ROOT.joinpath(".streamlit")
 
-# 1) Ensure container will not attempt to write to '/' for Streamlit config or metrics
-# Set XDG_CONFIG_HOME to repo .streamlit unless the user already set one
-os.environ.setdefault("XDG_CONFIG_HOME", str(STREAMLIT_DIR))
-# Ensure HOME is not root; some environments expect HOME for user files
-os.environ.setdefault("HOME", str(ROOT))
+# --- FORCE environment variables (overwrite any existing HF defaults) ---
+# Use a repo-local .streamlit directory so Streamlit won't try to write to '/'
+os.environ["XDG_CONFIG_HOME"] = str(STREAMLIT_DIR)
+# Ensure HOME is a writable folder inside the repo as well
+os.environ["HOME"] = str(ROOT)
+# Also set STREAMLIT_RUNTIME_DIR (added safety) and disable telemetry server writes
+os.environ.setdefault("STREAMLIT_RUNTIME_DIR", str(ROOT.joinpath(".streamlit", "runtime")))
 
 # 2) Create .streamlit and a minimal config.toml if it doesn't exist
 STREAMLIT_DIR.mkdir(parents=True, exist_ok=True)
@@ -33,6 +36,15 @@ if not cfg.exists():
         encoding="utf-8",
     )
 
-# 3) Run your real Streamlit app script (runs as __main__)
-# Use runpy so src/app.py will behave the same way as running `python src/app.py`
+# Make sure runtime dir exists
+runtime_dir = Path(os.environ.get("STREAMLIT_RUNTIME_DIR"))
+runtime_dir.mkdir(parents=True, exist_ok=True)
+
+# 3) Diagnostic print for logs (helps debug in Space logs)
+print("streamlit_app launcher: XDG_CONFIG_HOME =", os.environ.get("XDG_CONFIG_HOME"))
+print("streamlit_app launcher: HOME =", os.environ.get("HOME"))
+print("streamlit_app launcher: STREAMLIT_RUNTIME_DIR =", os.environ.get("STREAMLIT_RUNTIME_DIR"))
+sys.stdout.flush()
+
+# 4) Run your real Streamlit app script (runs as __main__)
 runpy.run_path(str(ROOT.joinpath("src", "app.py")), run_name="__main__")