Update app.py

app.py

@@ -183,6 +183,7 @@ def merge(yaml_config: str, hf_token: str, repo_name: str) -> Iterable[List[Log]
         if not repo_name:
             yield runner.log("No repo name provided. Generating a random one.")
             repo_name = f"mergekit-{merge_config.merge_method}"
+            # Make repo_name "unique" (no need to be extra careful on uniqueness)
             repo_name += "-" + "".join(random.choices(string.ascii_lowercase, k=7))
             repo_name = repo_name.replace("/", "-").strip("-")
 
@@ -197,7 +198,8 @@ def merge(yaml_config: str, hf_token: str, repo_name: str) -> Iterable[List[Log]
             yield runner.log(f"Error creating repo {e}", level="ERROR")
             return
 
-        tmp_env = os.environ.copy()  
+        # Set tmp HF_HOME to avoid filling up disk Space
+        tmp_env = os.environ.copy() # taken from https://stackoverflow.com/a/4453495
         tmp_env["HF_HOME"] = f"{tmpdirname}/.cache"
         full_cli = cli + f" --lora-merge-cache {tmpdirname}/.lora_cache"
         yield from runner.run_command(full_cli.split(), cwd=merged_path, env=tmp_env)