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modules/homebrew: add shell integration options

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Add `enableBashIntegration`, `enableFishIntegration`, and
`enableZshIntegration` options that evaluate `brew shellenv` to set up
Homebrew's environment and shell completions. This automates the
boilerplate that every nix-darwin Homebrew user currently writes manually.

All three shells use `interactiveShellInit`, consistent with direnv and
home-manager conventions. Fish additionally sets up completions paths in
the same hook.
This commit is contained in:
Malo Bourgon 2026-02-10 00:06:24 -08:00
parent 8c29e146dd
commit ca6f8609c3
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tests/homebrew-shell-integration.nix Normal file
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{ config, ... }:
{
homebrew.enable = true;
programs.bash.enable = true;
programs.zsh.enable = true;
programs.fish.enable = true;
homebrew.user = "test-homebrew-user";
homebrew.enableBashIntegration = true;
homebrew.enableFishIntegration = true;
homebrew.enableZshIntegration = true;
test = ''
echo >&2 "checking bash shell integration in /etc/bashrc"
grep 'brew shellenv bash' ${config.out}/etc/bashrc
echo >&2 "checking bash completions in /etc/bashrc"
grep 'bash_completion' ${config.out}/etc/bashrc
echo >&2 "checking zsh shell integration in /etc/zshrc"
grep 'brew shellenv zsh' ${config.out}/etc/zshrc
echo >&2 "checking fish shell integration in /etc/fish/config.fish"
grep 'brew shellenv fish' ${config.out}/etc/fish/config.fish
echo >&2 "checking fish completions in /etc/fish/config.fish"
grep 'fish_complete_path' ${config.out}/etc/fish/config.fish
'';
}