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ci: robust apt steps for opam and core-32bit (skip system ocaml, retry, mirror fallback) #53

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zachyking merged 2 commits into from
Oct 26, 2026
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ci: robust apt steps for opam and core-32bit (skip system ocaml, retry, mirror fallback) #53

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temporary: apt diagnostic
zachyking Oct 26, 2026
4c84bf3
ci: make the opam and multilib apt steps robust against a slow Azure …
zachyking Oct 26, 2026
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20 changes: 18 additions & 2 deletions .github/workflows/ci.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -126,8 +126,14 @@ jobs:
# Bound each attempt and retry instead of waiting out the job limit.
- name: install 32-bit linker (multilib)
run: |
APT="-o Acquire::Retries=5 -o Acquire::http::Timeout=60"
for attempt in 1 2 3; do
sudo timeout 300 apt-get update && sudo timeout 600 apt-get install -y gcc-multilib && exit 0
# The runner's default mirror (azure.archive.ubuntu.com) can stall on one large file; from the
# second attempt use the canonical archive instead (this step's runner only, not global).
if [ "$attempt" -gt 1 ]; then
sudo sed -i 's|^URIs:.*|URIs: http://archive.ubuntu.com/ubuntu|' /etc/apt/sources.list.d/ubuntu.sources
fi
sudo timeout 300 apt-get update $APT && sudo timeout 600 apt-get install -y $APT gcc-multilib && exit 0
echo "apt attempt $attempt failed or timed out; retrying" >&2
sleep 20
done
Expand Down Expand Up @@ -655,8 +661,18 @@ jobs:
key: averin-aeneas-${{ runner.os }}-${{ steps.pins.outputs.key }}-${{ hashFiles('formal/production/setup-toolchain.sh') }}
- name: system packages for opam (bounded, retried; see core-32bit)
run: |
# opam only Recommends ocaml (apt-cache depends opam, noble); setup-toolchain.sh builds its own OCaml
# 5.3.0, so the 81 MB system ocaml 4.14 (the download that kept hanging) is skipped. The
# recommends opam/the build still use are named explicitly: git, rsync, m4, ca-certificates.
APT="-o Acquire::Retries=5 -o Acquire::http::Timeout=60"
for attempt in 1 2 3; do
sudo timeout 300 apt-get update && sudo timeout 900 apt-get install -y opam libgmp-dev pkg-config zstd && exit 0
# From the second attempt use the canonical archive instead of the azure mirror (this step's
# runner only, not global).
if [ "$attempt" -gt 1 ]; then
sudo sed -i 's|^URIs:.*|URIs: http://archive.ubuntu.com/ubuntu|' /etc/apt/sources.list.d/ubuntu.sources
fi
sudo timeout 300 apt-get update $APT && sudo timeout 900 apt-get install -y $APT --no-install-recommends \
opam libgmp-dev pkg-config zstd git rsync m4 ca-certificates && exit 0
echo "apt attempt $attempt failed or timed out; retrying" >&2
sleep 20
done
Expand Down
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