pnpm: EPERM: operation not permitted, rename

pnpm version: 1.30.2

Code to reproduce the issue:

Install a very large number of dependencies (like 2,084).

Expected behavior:

Everything is always installed and unpacked.

Actual behavior:

Fairly often we get an error like:

EPERM: operation not permitted, rename 'Z:\sp-client\2\common\temp\pnpm-store\2\onedrive.pkgs.visualstudio.com\highcharts\5.0.14_stage' -> 'Z:\sp-client\2\common\temp\pnpm-store\2\onedrive.pkgs.visualstudio.com\highcharts\5.0.14\node_modules\highcharts'

This usually happens when the store is empty to start with. It seems like it may be an issue with file locking (possibly related to the Windows Defender holding locks on newly created files). This also occurs with different packages each time. It seems to happen more often with larger packages. My naive assumption is that the larger packages just got extracted to disk and we immediately try to rename them while MsMpEng.exe is also trying to scan them.

Rush runs pnpm in a loop, attempting installations up to 5 times, which helps mitigate the issue, but it definitely slows down installs (and confuses people when they see errors).

Suggestion is to run the rename operation in a retry loop, with an exponential backoff.

Additional information:

• node -v prints: 8.9.4
• Windows, OS X, or Linux?: Windows