With the live-gateway refusal reverted (#134824), `hermes plugins uninstall`
on Windows still failed with [WinError 5] whenever the running gateway had
the plugin loaded with a file open or a native .pyd mapped: Windows will
neither delete such a file nor rename its directory. The command exited 1
and left a half-deleted plugin.
Removal now deletes what it can. When a held file stops the delete, the rest
of the tree moves out of plugins/ into <HERMES_HOME>/cache/plugin-pending-delete,
which works for mapped DLLs. When the directory itself is held and cannot move,
removal deletes its manifests so the plugin can no longer load. The install
record is dropped in both cases, and the gateway's next start sweeps what was
parked. POSIX is unchanged: a PermissionError still raises.
Live proof: tests/hermes_cli/test_plugin_uninstall_windows_live.py (a real
gateway with plain, open-handle and native-.pyd plugins) fails 2 of 3 on the
revert branch and passes 3 of 3 with this change on windows-latest.
61b7f957ba