A second workflow, triggered when the install test completes, posts one
comment on the pull request and updates it on every run: install, first
boot and everyday boot next to quattro's latest numbers, with the change,
and the install phases in a collapsed table. Pushes to quattro now run
the install test too, so there is always a baseline.
It runs from quattro's copy with write access, which works for pull
requests from forks, so it never checks out or runs pull request code.
It reads only the finished run's artifact, trusts the pull request
number in it only when that pull request's head is the commit the run
tested, and keeps phase names to plain text.
Builds the ISO a pull request produces, installs it unattended in a KVM
guest on a GitHub-hosted runner, boots the installed system again, and
writes the install time per phase plus first-boot and everyday-boot
systemd-analyze to the job summary. Every later installer change is
measured against these numbers in its own PR.
Locally against the 2026-10-04 quattro ISO: install 51.3 s (42.9 s of
it pacstrap), first boot 12.1 s, everyday boot 11.7 s with ~6 s in the
loader, systemd running, no failed units.
A disk check replaces a cleanup step: the runner has ~86 GB free, so
the 2-minute "Free Disk Space" action the nightly uses is not needed.
Emir Beganovic