Update app/ranker.py

app/ranker.py

@@ -1,9 +1,15 @@
 # utils/ranker.py
+import os
 from sentence_transformers import SentenceTransformer, util
 from .utils import extract_text_from_pdf
 
+# Set safe cache directories for Hugging Face models (especially for read-only environments like Hugging Face Spaces)
+os.environ["HF_HOME"] = "/tmp/hf"
+os.environ["TRANSFORMERS_CACHE"] = "/tmp/hf"
+os.environ["SENTENCE_TRANSFORMERS_HOME"] = "/tmp/hf"
+
+# Load the model globally
 model = SentenceTransformer('paraphrase-MiniLM-L6-v2')
-  # You can load this once globally
 
 def rank_resumes_by_semantic_similarity(resume_files, job_description):
     resume_texts = [extract_text_from_pdf(f) for f in resume_files]