Change HF_HOME

Dockerfile

@@ -23,9 +23,16 @@ COPY . .
 # HF routes traffic to $PORT – bind to it
 ENV PORT=7860 PYTHONUNBUFFERED=1
 
-# Set environment variables for Phase 2 (real ML)
-ENV DATA_ROOT=/app/data
+# Set environment variables for HF Spaces
+ENV HF_HOME=/data
+ENV DATA_ROOT=/data
 ENV STUB_MODE=0
 
+# Create writable directories and set permissions
+RUN mkdir -p /data/outputs /data/artifacts && \
+    chmod 755 /data && \
+    chmod 755 /data/outputs && \
+    chmod 755 /data/artifacts
+
 # Use ENTRYPOINT instead of CMD to prevent Hugging Face from overriding
 ENTRYPOINT ["gunicorn", "-w", "1", "-k", "gthread", "-t", "300", "-b", "0.0.0.0:7860", "backend.runner.app:app"]

backend/runner/config.py

@@ -11,15 +11,27 @@ PROJECT_ROOT = Path(__file__).resolve().parents[2]
 DATA_READ_ROOT = PROJECT_ROOT / "data"
 
 # WRITE root (Space volume - writable)
+# HF Spaces uses /data for persistent storage
 WRITE_ROOT = Path(os.getenv("HF_HOME", "/data"))
-if not WRITE_ROOT.exists() or not os.access(WRITE_ROOT, os.W_OK):
-    print(f"⚠️  WRITE_ROOT {WRITE_ROOT} not writable, trying /tmp")
-    WRITE_ROOT = Path("/tmp")
-    if not os.access(WRITE_ROOT, os.W_OK):
-        print(f"❌ Neither /data nor /tmp are writable")
-        raise RuntimeError("No writable directory available")
-else:
-    print(f"✅ Using WRITE_ROOT: {WRITE_ROOT}")
+
+# Check if the directory exists and is writable
+if not WRITE_ROOT.exists():
+    print(f"⚠️  WRITE_ROOT {WRITE_ROOT} does not exist, trying to create it")
+    try:
+        WRITE_ROOT.mkdir(parents=True, exist_ok=True)
+        print(f"✅ Created WRITE_ROOT: {WRITE_ROOT}")
+    except Exception as e:
+        print(f"❌ Failed to create {WRITE_ROOT}: {e}")
+        raise RuntimeError(f"Cannot create writable directory: {e}")
+
+# Check write permissions
+if not os.access(WRITE_ROOT, os.W_OK):
+    print(f"❌ WRITE_ROOT {WRITE_ROOT} is not writable")
+    print(f"❌ Current permissions: {oct(WRITE_ROOT.stat().st_mode)[-3:]}")
+    print(f"❌ Owner: {WRITE_ROOT.owner()}")
+    raise RuntimeError(f"Directory {WRITE_ROOT} is not writable")
+
+print(f"✅ Using WRITE_ROOT: {WRITE_ROOT}")
 
 print(f"✅ Using READ_ROOT: {DATA_READ_ROOT}")