Fail bundle install if a formula is installed but not linked

[andreineculau]

We have a situation where people install software outside of homebrew, and running brew bundle install will install the formulae but then fail creating the symlinks. Trying again though will succeed, although the symlinks are not enabled, thus hiding the problem.

At least my expectation is that brew bundle install is deterministic.
No problems: we installed AND linked n formulae.
Problems: we installed n but failed to link m formulae.

Right now it's not. Either there are no problems, or if there are, trying again and again and again will lead to a success message, with problems being ignored.

[jacobbednarz]

if i understand this correctly, this is less of a bundle problem and more of a brew + overwriting problem. what does the bundle file look like? what arguments are you passing in? what is the PATH setup on these systems?

[MikeMcQuaid]

Can you provide a minimal Brewfile and, ideally, brew commands that reproduce this behaviour?

[github-actions]

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