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Raise initial HTTPError if pipeline is not cached locally #4230

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Merged
patrickvonplaten merged 2 commits into from
Jul 24, 2023
Merged

Raise initial HTTPError if pipeline is not cached locally #4230

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c4c33a8
Raise initial HTTPError if pipeline is not cached locally
Wauplin Jul 24, 2023
f6e4c30
make style
Wauplin Jul 24, 2023
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44 changes: 30 additions & 14 deletions src/diffusers/pipelines/pipeline_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1248,6 +1248,7 @@ def download(cls, pretrained_model_name, **kwargs) -> Union[str, os.PathLike]:
allow_patterns = None
ignore_patterns = None

model_info_call_error: Optional[Exception] = None
if not local_files_only:
try:
info = model_info(
Expand All @@ -1258,6 +1259,7 @@ def download(cls, pretrained_model_name, **kwargs) -> Union[str, os.PathLike]:
except HTTPError as e:
logger.warn(f"Couldn't connect to the Hub: {e}.\nWill try to load from local cache.")
local_files_only = True
model_info_call_error = e # save error to reraise it if model is not cached locally

if not local_files_only:
config_file = hf_hub_download(
Expand Down Expand Up @@ -1389,20 +1391,34 @@ def download(cls, pretrained_model_name, **kwargs) -> Union[str, os.PathLike]:
user_agent["custom_pipeline"] = custom_pipeline

# download all allow_patterns - ignore_patterns
cached_folder = snapshot_download(
pretrained_model_name,
cache_dir=cache_dir,
resume_download=resume_download,
proxies=proxies,
local_files_only=local_files_only,
use_auth_token=use_auth_token,
revision=revision,
allow_patterns=allow_patterns,
ignore_patterns=ignore_patterns,
user_agent=user_agent,
)

return cached_folder
try:
return snapshot_download(
pretrained_model_name,
cache_dir=cache_dir,
resume_download=resume_download,
proxies=proxies,
local_files_only=local_files_only,
use_auth_token=use_auth_token,
revision=revision,
allow_patterns=allow_patterns,
ignore_patterns=ignore_patterns,
user_agent=user_agent,
)
except FileNotFoundError:
# Means we tried to load pipeline with `local_files_only=True` but the files have not been found in local cache.
# This can happen in two cases:
# 1. If the user passed `local_files_only=True` => we raise the error directly
# 2. If we forced `local_files_only=True` when `model_info` failed => we raise the initial error
if model_info_call_error is None:
# 1. user passed `local_files_only=True`
raise
else:
# 2. we forced `local_files_only=True` when `model_info` failed
raise EnvironmentError(
f"Cannot load model {pretrained_model_name}: model is not cached locally and an error occured"
" while trying to fetch metadata from the Hub. Please check out the root cause in the stacktrace"
" above."
) from model_info_call_error

@staticmethod
def _get_signature_keys(obj):
Expand Down