fix: Use app directory for cache to resolve HuggingFace Spaces permissions

- Change cache directory from ~/.cache to app/.cache for write permissions
- Fix PermissionError: [Errno 13] Permission denied: '/.cache'
- Use os.getcwd() based paths for HuggingFace Spaces compatibility
- Ensure all directories are writable within the container

highlights_api.py

@@ -7,14 +7,15 @@ Converts your SmolVLM2 + Whisper system into a web API for Android apps
 import os
 import tempfile
 
-# Set cache directories to persistent locations before importing HF libraries
-CACHE_DIR = os.path.expanduser("~/.cache/huggingface")
+# Set cache directories to writable locations for HuggingFace Spaces
+CACHE_DIR = os.path.join(os.getcwd(), ".cache", "huggingface")
 os.makedirs(CACHE_DIR, exist_ok=True)
+os.makedirs(os.path.join(os.getcwd(), ".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.expanduser("~/.cache/torch")
-os.environ['XDG_CACHE_HOME'] = os.path.expanduser("~/.cache")
+os.environ['TORCH_HOME'] = os.path.join(os.getcwd(), ".cache", "torch")
+os.environ['XDG_CACHE_HOME'] = os.path.join(os.getcwd(), ".cache")
 os.environ['HUGGINGFACE_HUB_CACHE'] = CACHE_DIR
 os.environ['TOKENIZERS_PARALLELISM'] = 'false'
 
@@ -88,8 +89,8 @@ completed_jobs = {}
 import tempfile
 import stat
 
-# Use system temp directory for Hugging Face Spaces compatibility
-TEMP_DIR = tempfile.mkdtemp(prefix="smolvlm2_")
+# Use app directory for HuggingFace Spaces compatibility
+TEMP_DIR = os.path.join(os.getcwd(), "temp")
 OUTPUTS_DIR = os.path.join(os.getcwd(), "outputs")
 
 # Create directories with proper permissions

src/smolvlm2_handler.py

@@ -7,15 +7,16 @@ Handles loading and inference with SmolVLM2-256M-Instruct model (smallest model
 import os
 import tempfile
 
-# Set cache directories to persistent locations before importing transformers
+# Set cache directories to writable locations for HuggingFace Spaces
 if 'HF_HOME' not in os.environ:
-    CACHE_DIR = os.path.expanduser("~/.cache/huggingface")
+    CACHE_DIR = os.path.join(os.getcwd(), ".cache", "huggingface")
     os.makedirs(CACHE_DIR, exist_ok=True)
+    os.makedirs(os.path.join(os.getcwd(), ".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.expanduser("~/.cache/torch")
-    os.environ['XDG_CACHE_HOME'] = os.path.expanduser("~/.cache")
+    os.environ['TORCH_HOME'] = os.path.join(os.getcwd(), ".cache", "torch")
+    os.environ['XDG_CACHE_HOME'] = os.path.join(os.getcwd(), ".cache")
     os.environ['HUGGINGFACE_HUB_CACHE'] = CACHE_DIR
     os.environ['TOKENIZERS_PARALLELISM'] = 'false'