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Brennan Benson
15d2e31777
* ci: bound the shell-contracts apt install so a stalled mirror cannot wedge the run shell contracts wedges intermittently. It is not a lock, not a prompt, and not the PR under test - it is download throughput with no wall-clock bound. Measured on a passing run: apt-get update fetched 11.4 MB of index in 40s, then apt-get install fetched 8.9 MB of packages at 65 kB/s taking 2m17s, while the shell-contract tests the job exists to run took 14s. apt applies no wall-clock bound to a stalled mirror, so when throughput drops below that already-poor baseline the step runs indefinitely - observed at 12+ minutes and climbing while every other job had passed. The job also had no timeout-minutes, so it inherited GitHub's 6h default, and an in-progress required check holds the whole run open and blocks rerun --failed. Bounds both layers: timeout-minutes on the job (a passing run is ~4m30s), and Acquire timeouts plus retries in apt.conf.d so a dead mirror fails fast while a transient blip still passes. Written to apt.conf.d rather than onto the command lines because pr-workflow-parallelism.test.mjs parses those invocations. Does not make the job faster; the 3m38s of download is untouched. Scoping the index refresh to just the PPA risks installing against a stale base index and wants its own evidence. * ci: bound the apt commands by wall clock, not per-connection timeouts The first attempt at this set Acquire timeouts of 30s with 3 retries. That made the wedge worse and the job's own timeout-minutes proved it: on this PR the install step ran 14m26s and was killed by the 15 minute bound. The log shows why. Acquire timeouts are per-connection, so a dead mirror costs timeout x retries x every index file: 30s x 3 across roughly ten index files is ~15 minutes, which is what was observed. The azure archive mirror returned Ign for every suite, apt fell back to archive.ubuntu.com, and that connection then produced zero bytes for 14m26s. So per-connection bounds cannot bound this step; only a wall-clock bound can. Wraps both apt invocations in `timeout`, and drops Acquire::Retries to 1 so a dead mirror fails once instead of multiplying. The update is already tolerant by design, so bounding it just caps what a dead mirror costs before the install runs against whatever index exists. Also drops DPkg::Lock::Timeout: no lock contention was ever observed in these logs, and an option added on speculation is not worth carrying.