- shell:
    - comm -13 <(brew list) brew/formulae | xargs brew install
    - comm -13 <(brew cask list) brew/casks | xargs brew cask install

- link:
    ~/.config/zsh/os.zshrc: zsh/darwin.zshrc
    ~/.config/git/config-os: git/config-darwin
    ~/.config/nvim/os-plugins.vim: neovim/darwin-plugins.vim