TODO 2.9 recorded a retention policy that warned about low disk while freeing
0.0 GB twice in a row, because it governed artifacts, logs and IP leases -- 52
KB in total on this host -- while 195 G of backups sat outside its reach.
Adding an unbounded directory of ~645 MB entries, one per Cargo.lock change,
without extending retention in the same change would repeat that at a larger
scale.
The window is the tighter of the global retention and the cache's own, so the
aggressive low-disk mode reaches the cache rather than stopping at the light
directories.
Sizes are read before deleting, not after. Summing st_size over files that have
already been unlinked yields 0 -- which is exactly how a policy ends up
reporting that it freed nothing while doing real work. A test asserts the
reported figure.
Move disk cleanup out of the Windows Update loop:
- PS scripts: extract Invoke-DiskCleanup function, add -CleanupOnly switch
for standalone post-update cleanup pass.
- Python command: always pass -SkipCleanup:$true during WU loop; after
loop exits 0, run a separate -CleanupOnly invocation (skipped if
--skip-cleanup). Fails fast if cleanup-only returns nonzero.
- Tests: 3 new tests for cleanup-runs-after-loop, skip-cleanup suppresses
it, and cleanup-failure propagates as ClickException.
- ruff --fix: remove unused shutil import, sort imports, fix UP037/UP035.
- Add `retention run` command (ports Invoke-RetentionPolicy.ps1): purges
old artifact/log dirs with aggressive mode when disk space is low.
- Add `template backup` command (ports Backup-CITemplate.ps1): 7z -mx=1
compressed archives in /var/lib/ci/backups/, prunes to keep-count=3,
stops/restarts act-runner.service around the copy.
- Update ci-retention-policy.service and ci-backup-template.service to use
Python; pwsh is no longer required on the Linux host.
- Fix ci-watch-runner-health.service: pass --service-name act-runner
(Linux service name, not Windows act_runner default).
- Fix _list_orphans in vm.py: wrap is_dir() inside the OSError try block
so a stat() failure on an entry is silently skipped rather than raised.
- Mark B5 complete in PhaseB-user-checklist.md.
Simone