Native packages cleared and require rebuild every time

[Nantris]

Bug description

This wasn't a problem in some earlier version (like maybe 1.17,x) but we've upgraded to the latest to keep up with security, and we have to rebuild everything, every time now.

Command

yarn

What is the current behavior?
Native dependencies built files are destroyed on every install. This makes installing any package, no matter how trivially small, a 10 minute or longer process.

What is the expected behavior?
Yarn spares the built files of native dependencies.

Steps to Reproduce

1. Have a native dependency that has built output files
2. Run yarn and watch them disappear

Environment

• Node Version: 12.13.0
• Yarn v1 Version: 1.21.1
• OS and version: Windows 7

[Nantris]

This is a duplicate of #932, except that it affects newer versions of Yarn. I'm not sure what version this began, but I want to say it's related to this issue perhaps: #7807 (comment)

This worked fine for me in 1.17 and 1.18. I haven't tested reverting and running since that's probably a good hour total, but in the meantime I'm copying saved copied of native dependencies back into node_modules after running yarn, which is far from ideal. @arcanis any thoughts on this?

[merceyz]

Closing as fixed in v2 where the tracking of what needs to be rebuilt has been greatly improved

https://yarnpkg.com/getting-started/migration