fix: use default environment variables when user don't provide any inputs

app.py

@@ -8,13 +8,19 @@ CURRENT_MODEL_PATH = "./current_model"
 HF_TOKEN = os.environ.get("HF_TOKEN", None)
 REPO = os.getenv("REPO")
 REVISION = os.getenv("REVISION")
+TARGET = os.getenv("TARGET")
 
 def func(hf_token, repo, revision, target_repo):
+    hf_token = hf_token if len(hf_token)>0 else HF_TOKEN
+    repo = repo if len(repo)>0 else REPO
+    revision = revision if len(revision)>0 else REVISION
+    target_repo = target_repo if len(target_repo)>0 else TARGET
+    
     print('download the desired model locally ...')
     hf_api.snapshot_download(
-        repo_id=repo if len(repo)>0 else REPO,
-        revision=revision if len(revision)>0 else REVISION,
-        token=hf_token if len(hf_token)>0 else HF_TOKEN,
+        repo_id=repo,
+        revision=revision,
+        token=hf_token,
         local_dir=CURRENT_MODEL_PATH,
     )
     print(os.listdir(CURRENT_MODEL_PATH))