Declarative Homebrew

I want to keep my development environment consistent across both my work and personal MacBooks. (That’s why I use mise and have dotfiles repository.)

One thing that didn’t sit well with me about the process was keeping my Homebrew installations up to date. Presiously, I had used the make dump command that I would run occasionally to update Brewfile with brew bundle dump. The problem was that it always lagged behind the actual state of my machine.

Now, I have Fish function that updates Brewfile every time I run a potentially destructive brew command:

function brew
  command brew $argv; and\
  switch $argv[1]
    case install uninstall reinstall tap untap
      brew bundle dump --file $DOTFILES_ROOT/Brewfile --force
  end
end