[pull] master from microsoft:master#92
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Add staged upgrade mode to the installer, activated by /KEEPMOUNTED=true
in silent installs or via dialog in interactive mode. Without this flag,
the installer behaves as before.
When staging:
- Most files go to {app}\PendingUpgrade\ instead of replacing in-place
- GVFS.Service.exe is replaced directly (brief stop/start)
- Mount processes continue running on old binaries throughout
- .ready marker written after all files staged (guards against partial)
When not staging (clean upgrade):
- CloseApplications=no prevents Restart Manager from killing processes
- Force-kill GVFS processes if unmount-all fails to clean up
- WaitForServiceProcessToExit polls sc query after sc stop/delete
Assisted-by: Claude Opus 4.6
Signed-off-by: Tyrie Vella <tyrielv@gmail.com>
Add PendingUpgradeHandler to apply staged upgrades using atomic file moves (old files to PreviousVersion, staged files to install dir). Skips GVFS.Service.exe (already replaced by installer, locked by running service). Safety mechanisms: - .ready marker: rejects PendingUpgrade if installer was interrupted - .phase1-complete marker: ensures crash during backup is recoverable (incomplete Phase 1 is restored and retried, not skipped) - Defers if any GVFS.Mount processes are still running Trigger upgrade in two ways: - On service start: checks before automount - After repo unmount: timer-based debounce (5s) so multiple unmounts in quick succession result in a single upgrade attempt Assisted-by: Claude Opus 4.6 Signed-off-by: Tyrie Vella <tyrielv@gmail.com>
Add upgrade-tests.yaml with matrix of 5 scenarios: - staging-upgrade: LKG -> mount -> stage -> unmount -> verify completion - clean-upgrade: LKG -> mount -> clean install -> verify - double-staging: stage twice, verify second overwrites first - staging-then-clean: stage then clean install removes PendingUpgrade - mount-safety-deferral: verify upgrade defers while mount is running Wire into build.yaml as a required check alongside functional tests. Assisted-by: Claude Opus 4.6 Signed-off-by: Tyrie Vella <tyrielv@gmail.com>
Non-disruptive upgrade: staged install with in-process file copy
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