PATH management is broken when the profile is a symlink to cloud storage

[jandubois]

When ~/.bash_profile or ~/.zshrc are symlinks to cloud storage, then the path management code can no longer copy the file:

❯ cat path-management.log
2025-04-29T16:39:58.462Z: Error: EPERM: operation not permitted, copyfile '/Users/jan/.bash_profile' -> '/Users/jan/.bash_profile.rd-backup~'

I've verified this issue with both Dropbox and iCloud. E.g. this is enough to repro (assuming ~/.bash_profile is a real file):

❯ mv .bash_profile "$HOME/Library/Mobile Documents/com~apple~CloudDocs"
❯ ln -s "$HOME/Library/Mobile Documents/com~apple~CloudDocs/.bash_profile"

I've manually bisected this to #8443. The binaries from #8544, which was merged just before it, do not exhibit this problem.

I've tested this with macOS 15.4.1 and 15.5 Beta 5 on M1 machines.

I could not reproduce it with macOS 12.7.6 on an Intel Mac.

[jandubois]

#8443 is a bump of electron-builder, which seems an unlikely candidate to affect how fs.promises.copyFile works.

The fact that the error is not reproducible with yarn dev but only with a packaged build does however corroborate the bisect result.