[CLI] Respect HF_DEBUG environment variable (#3562)

* set verbosity to debug when HF_DEBUG is set to True

* style

Author: hanouticelina

src/huggingface_hub/cli/hf.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 
+from huggingface_hub import constants
 from huggingface_hub.cli._cli_utils import check_cli_update, typer_factory
 from huggingface_hub.cli.auth import auth_cli
 from huggingface_hub.cli.cache import cache_cli
@@ -51,7 +52,8 @@
 
 
 def main():
-    logging.set_verbosity_info()
+    if not constants.HF_DEBUG:
+        logging.set_verbosity_info()
     check_cli_update()
     app()