Handle installatio of custom .whl

HuggingFace Spaces loads the requirements.txt before loading the entire app directory. That's why the installation of the custom .whl needs to be handled at runtime.

app.py

@@ -1,20 +1,35 @@
+import os
+
 import gradio as gr
+import pkg_resources
 from dotenv import load_dotenv
 
-from cv_assistant.agent import Agent
-
 load_dotenv()
 
-agent = Agent(
-    faiss_index_path="./content_assets/docs.index",
-    faise_store_path="./content_assets/faiss_store.pkl",
-)
+
+def package_installed(package_name):
+    try:
+        pkg_resources.get_distribution(package_name)
+    except pkg_resources.DistributionNotFound:
+        return False
+    else:
+        return True
 
 
 def answer(query):
     return agent.answer(query=query)
 
 
+if not package_installed("cv_assistant"):
+    os.system("pip install cv_assistant-0.1-py2.py3-none-any.whl")
+
+from cv_assistant.agent import Agent
+
+agent = Agent(
+    faiss_index_path="./content_assets/docs.index",
+    faise_store_path="./content_assets/faiss_store.pkl",
+)
+
 description = """
 ### Ask about my experience, skills, and education!
 

requirements.txt

@@ -3,4 +3,3 @@ langchain==0.0.125
 openai==0.27.2
 python-dotenv==1.0.0
 transformers==4.24.0
-/home/user/app/cv_assistant-0.1-py2.py3-none-any.whl