osdc/hf-cache: integration test — refresh (online download → S3 sync)#818
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Stack from ghstack (oldest at bottom):
BEGIN_HF_CACHE_OIDC job block (gated on arc-runners + hf-cache):
test-hf-cache-refresh-sync mirrors ci-refresh-hf-cache — assumes the
gha_workflow_hf-cache-write role via GitHub OIDC (environment: hf-cache-write,
id-token: write), downloads a small model (prajjwal1/bert-tiny) from the HF Hub
online, then aws s3 syncs the artifacts to the cluster's bucket and verifies the
objects landed.
The job FAILS if the OIDC role can't be assumed — a swallowed OIDC failure would
hide that the refresh can't actually write the cache. Activating it requires the
'hf-cache-write' environment on the test repo and the role (pytorch-gha-infra
#1239) trusting its OIDC subject.