ci: bound the apt install and prefer the canonical Ubuntu archive - #81
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The Install system dependencies step had no timeout. On 2026-08-19 the Azure apt mirror failed, and the step ran for over an hour on main before I cancelled it. The same mirror fault stopped the paper build in openadapt-flow on the same day. The hosted runner resolves its mirror through /etc/apt/apt-mirrors.txt, which points at azure.archive.ubuntu.com. apt does fall back to the canonical archive, but it spends the whole budget first. Point the file at the canonical archive before apt-get update, retry update three times with backoff, and fail with a clear message instead of a silent hang. The step also gets a 10 minute bound. The package list is unchanged. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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The problem
Install system dependencieshas notimeout-minutes. On 2026-08-19 it ran for over an hour onmain(run32290540907, commit7c83ba2) before I cancelled it. Every earliermainrun of this workflow had succeeded, so this is an environment fault meeting an unbounded step.The same Azure apt mirror fault stopped the paper build in
openadapt-flowon the same day (fixed there by openadapt-flow#374).The change
The hosted runner resolves its Ubuntu mirror through
/etc/apt/apt-mirrors.txt, which points atazure.archive.ubuntu.com. apt does eventually fall back to the canonical archive, but it spends the whole budget getting there. So:apt-mirrors.txtathttp://archive.ubuntu.com/ubuntubeforeapt-get update, best-effort;apt-get updatethree times with backoff;The package list is unchanged.
Evidence this works
The identical change in
openadapt-flowtook the TeX install from a 10 minute timeout to 83 seconds on the next run.🤖 Generated with Claude Code