Fix: Use /tmp for cache directories to resolve permission errors

- Changed cache directory from /app/.cache to /tmp/.cache
- /tmp is guaranteed to be writable in container environments
- Fixes PermissionError: [Errno 13] Permission denied: '/app/.cache'
- Applied to both highlights_api.py and src/smolvlm2_handler.py

highlights_api.py

@@ -8,14 +8,15 @@ import os
 import tempfile
 
 # Set cache directories to writable locations for HuggingFace Spaces
-CACHE_DIR = os.path.join(os.getcwd(), ".cache", "huggingface")
+# Use /tmp which is guaranteed to be writable in containers
+CACHE_DIR = os.path.join("/tmp", ".cache", "huggingface")
 os.makedirs(CACHE_DIR, exist_ok=True)
-os.makedirs(os.path.join(os.getcwd(), ".cache", "torch"), exist_ok=True)
+os.makedirs(os.path.join("/tmp", ".cache", "torch"), exist_ok=True)
 os.environ['HF_HOME'] = CACHE_DIR
 os.environ['TRANSFORMERS_CACHE'] = CACHE_DIR
 os.environ['HF_DATASETS_CACHE'] = CACHE_DIR
-os.environ['TORCH_HOME'] = os.path.join(os.getcwd(), ".cache", "torch")
-os.environ['XDG_CACHE_HOME'] = os.path.join(os.getcwd(), ".cache")
+os.environ['TORCH_HOME'] = os.path.join("/tmp", ".cache", "torch")
+os.environ['XDG_CACHE_HOME'] = os.path.join("/tmp", ".cache")
 os.environ['HUGGINGFACE_HUB_CACHE'] = CACHE_DIR
 os.environ['TOKENIZERS_PARALLELISM'] = 'false'
 

src/smolvlm2_handler.py

@@ -9,14 +9,15 @@ import tempfile
 
 # Set cache directories to writable locations for HuggingFace Spaces
 if 'HF_HOME' not in os.environ:
-    CACHE_DIR = os.path.join(os.getcwd(), ".cache", "huggingface")
+    # Use /tmp which is guaranteed to be writable in containers
+    CACHE_DIR = os.path.join("/tmp", ".cache", "huggingface")
     os.makedirs(CACHE_DIR, exist_ok=True)
-    os.makedirs(os.path.join(os.getcwd(), ".cache", "torch"), exist_ok=True)
+    os.makedirs(os.path.join("/tmp", ".cache", "torch"), exist_ok=True)
     os.environ['HF_HOME'] = CACHE_DIR
     os.environ['TRANSFORMERS_CACHE'] = CACHE_DIR
     os.environ['HF_DATASETS_CACHE'] = CACHE_DIR
-    os.environ['TORCH_HOME'] = os.path.join(os.getcwd(), ".cache", "torch")
-    os.environ['XDG_CACHE_HOME'] = os.path.join(os.getcwd(), ".cache")
+    os.environ['TORCH_HOME'] = os.path.join("/tmp", ".cache", "torch")
+    os.environ['XDG_CACHE_HOME'] = os.path.join("/tmp", ".cache")
     os.environ['HUGGINGFACE_HUB_CACHE'] = CACHE_DIR
     os.environ['TOKENIZERS_PARALLELISM'] = 'false'