infer download_root from XDG_CACHE_HOME if avail #257
Merged
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This PR facilitates user-specified override download location for model checkpoints.
The environment variable
XDG_CACHE_HOME
defaults to the user cache (~/.cache
) and is widely adopted for specifying checkpoint download locations across the pytorch ecosystem, see for example how it is used by huggingface and torch.hub.Details regarding this and related environment variables can be found here: https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html