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fix(ci): don't invoke sccache when R2 secrets are unset #356

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lgahdl wants to merge 2 commits into from
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fix(ci): don't invoke sccache when R2 secrets are unset #356

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ac04561
fix(ci): don't invoke sccache when R2 secrets are unset
lgahdl Jul 15, 2026
8ea053d
docs(ci): explain why RUSTC_WRAPPER is conditional
lgahdl Jul 16, 2026
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7 changes: 6 additions & 1 deletion .github/workflows/ci.yml
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Expand Up @@ -29,7 +29,12 @@ env:
# deterministic, so PR builds writing to the shared bucket write correct objects
# under correct keys (no poisoning); bound storage with an R2 lifecycle-expiry
# rule on the bucket (sccache does not evict cloud backends itself).
RUSTC_WRAPPER: sccache
# Fork-headed pull_request runs never receive repo secrets, so
# secrets.R2_ACCOUNT_ID evaluates to empty string there; skip the
# wrapper entirely on those runs (empty RUSTC_WRAPPER is a cargo
# no-op) instead of letting sccache fail startup against a malformed
# empty-account-id endpoint.
RUSTC_WRAPPER: ${{ secrets.R2_ACCOUNT_ID != '' && 'sccache' || '' }}
CARGO_INCREMENTAL: "0"
SCCACHE_BUCKET: shepherd-sccache
SCCACHE_ENDPOINT: https://${{ secrets.R2_ACCOUNT_ID }}.r2.cloudflarestorage.com
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