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ci(setup-minimal): route package-cache reads through the R2 mirror #617

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ci(setup-minimal): route package-cache reads through the R2 mirror #617

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11 changes: 11 additions & 0 deletions .github/actions/setup-minimal/action.yml
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Expand Up @@ -38,3 +38,14 @@ runs:
- name: Enable unprivileged user namespaces
shell: bash
run: sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0
- name: Route package-cache reads through the R2 mirror
shell: bash
# Same move as webapp#380: CI runs on GitHub-hosted Azure runners, so
# cache reads from GCS are billed internet egress; cache.minimal.farm
# serves the identical immutable, sha256-verified artifacts from R2 at
# $0 egress. Measured before this change: the six advisory workflows
# cold-pull ~6.5 GB per fresh runner, ~370 GB/week across the fleet —
# the majority of remaining GCS egress spend. Written to $GITHUB_ENV so
# it reaches the calling job's later steps. Trailing slash required
# (Url::join). Rollback = delete this step.
run: echo "MINIMAL_REMOTE_CACHE_URL=https://cache.minimal.farm/" >> "$GITHUB_ENV"