IS_HUGGINGFACE_SPACES env for determining if the app runs on huggingface or not

app.py

@@ -1,3 +1,7 @@
+"""
+During development, to mimic the same behavior as on Hugging Face Spaces.
+PROMPT> IS_HUGGINGFACE_SPACES=true python app.py
+"""
 if __name__ == "__main__":
     from src.plan.app_text2plan import demo_text2plan
     demo_text2plan.launch()

src/plan/app_text2plan.py

@@ -1,5 +1,9 @@
 """
+Start the UI in single user mode.
 PROMPT> python -m src.plan.app_text2plan
+
+Start the UI in multi user mode, as on: Hugging Face Spaces.
+PROMPT> IS_HUGGINGFACE_SPACES=true python -m src.plan.app_text2plan
 """
 import gradio as gr
 import os
@@ -18,6 +22,11 @@ from src.prompt.prompt_catalog import PromptCatalog
 from src.utils.get_env_as_string import get_env_as_string
 from src.utils.time_since_last_modification import time_since_last_modification
 
+# Slightly different behavior when running inside Hugging Face Spaces, where it's not possible to open a file explorer.
+# And it's multi-user, so we need to keep track of the state for each user.
+IS_HUGGINGFACE_SPACES = os.getenv("IS_HUGGINGFACE_SPACES", "false").lower() == "true"
+print(f"IS_HUGGINGFACE_SPACES: {IS_HUGGINGFACE_SPACES}")
+
 MODULE_PATH_PIPELINE = "src.plan.run_plan_pipeline"
 DEFAULT_PROMPT_UUID = "4dc34d55-0d0d-4e9d-92f4-23765f49dd29"