Adopts two improvements from #81586 (kshitijk4poor), with one correction:
- Test-ManagedNodeInUse now queries Win32_Process (ExecutablePath +
CommandLine substring) instead of Get-Process .Path: a cmd.exe wrapper
running npm.cmd from the tree reports its own exe in System32, so the
tree path shows up only in the command line. Win32_Process.CommandLine
works on Windows PowerShell 5.1 and 7+, unlike the Get-Process
.CommandLine ETS property (7.4+ only); a single CIM query also beats a
per-process property access loop. This closes the gap flagged by the
triage bot on #81500 (Update-ManagedNpm's only in-use protection is
this pre-check).
- Test-Node stages the extracted tree to a sibling node.new-* before the
swap, so the final swap is a same-volume rename (atomic) instead of a
cross-volume Move-Item (copy+delete, non-atomic).
The mtime-touch ordering from #81586 was NOT adopted: touching the backup
only after the swap succeeds leaves it at its old (long-lived-tree) mtime
for the whole swap window, which the age-gated litter sweep (st_mtime <
cutoff) removes — reopening the concurrent-sweep race the touch exists to
close. The touch stays immediately after the backup rename.
Co-authored-by: kshitijk4poor <82637225+kshitijk4poor@users.noreply.github.com>
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