#compdef brew
  #autoload

  # imported from https://github.com/Homebrew/homebrew/blob/29f73d2212c2b202fe25f69dcbf440d8391fa4c9/Library/Contributions/brew_zsh_completion.zsh
  
  # Brew ZSH completion function
  # Drop this somewhere in your $fpath (like /usr/share/zsh/site-functions)
  # and rename it _brew
  #
  # altered from _fink

  
  _brew_all_formulae() {
    formulae=(`brew search`)
  }
  
  _brew_installed_formulae() {
    installed_formulae=(`brew list`)
  }
  
  _brew_installed_taps() {
    installed_taps=(`brew tap`)
  }

  _brew_official_taps() {
    official_taps=(`brew tap --list-official`)
  }
  
  _brew_pinned_taps() {
    pinned_taps=(`brew tap --list-pinned`)
  }

  _brew_outdated_formulae() {
    outdated_formulae=(`brew outdated`)
  }
  
  local -a _1st_arguments
  _1st_arguments=(
    'audit:check formulae for Homebrew coding style'
    'cat:display formula file for a formula'
    'cleanup:uninstall unused and old versions of packages'
    'commands:show a list of commands'

    'config:show homebrew and system configuration'

    'create:create a new formula'

    'deps:list dependencies and dependants of a formula'
    'desc:display a description of a formula'

    'doctor:audits your installation for common issues'
    'edit:edit a formula'
    'fetch:download formula resources to the cache'
    'gist-logs:generate a gist of the full build logs'
    'home:visit the homepage of a formula or the brew project'
    'info:information about a formula'
    'install:install a formula'
    'reinstall:install a formula anew; re-using its current options'

    'leaves:show installed formulae that are not dependencies of another installed formula'

    'link:link a formula'

    'linkapps:symlink .app bundles provided by formulae into /Applications'

    'list:list files in a formula or not-installed formulae'
    'log:git commit log for a formula'
    'missing:check all installed formuale for missing dependencies.'

    'migrate:migrate renamed formula to new name'

    'outdated:list formulae for which a newer version is available'
    'pin:pin specified formulae'
    'postinstall:perform post_install for a given formula'
    'prune:remove dead links'
    'remove:remove a formula'
    'search:search for a formula (/regex/ or string)'

    'switch:switch between different versions of a formula'

    'tap:tap a new formula repository from GitHub, or list existing taps'

    'tap-info:information about a tap'
    'tap-pin:pin a tap'
    'tap-unpin:unpin a tap'

    'test-bot:test a formula and build a bottle'
    'uninstall:uninstall a formula'
    'unlink:unlink a formula'

    'unlinkapps:remove symlinked .app bundles provided by formulae from /Applications'

    'unpin:unpin specified formulae'
    'untap:remove a tapped repository'

    'update:fetch latest version of Homebrew and all formulae'

    'upgrade:upgrade outdated formulae'
    'uses:show formulae which depend on a formula'

    `brew commands --quiet --include-aliases`

  )
  
  local expl

  local -a formulae installed_formulae installed_taps official_taps outdated_formulae

  
  _arguments \
    '(-v)-v[verbose]' \
    '(--cellar)--cellar[brew cellar]' \

    '(--env)--env[brew environment]' \
    '(--repository)--repository[brew repository]' \
    '(--version)--version[version information]' \
    '(--prefix)--prefix[where brew lives on this system]' \
    '(--cache)--cache[brew cache]' \

    '*:: :->subcmds' && return 0
  
  if (( CURRENT == 1 )); then
    _describe -t commands "brew subcommand" _1st_arguments
    return
  fi
  
  case "$words[1]" in

    install|reinstall|audit|home|homepage|log|info|abv|uses|cat|deps|desc|edit|options|switch)

      _brew_all_formulae
      _wanted formulae expl 'all formulae' compadd -a formulae ;;

    linkapps|unlinkapps)
      _arguments \
        '(--local)--local[operate on ~/Applications instead of /Applications]' \
        '1: :->forms' && return 0
  
      if [[ "$state" == forms ]]; then
        _brew_installed_formulae
        _wanted installed_formulae expl 'installed formulae' compadd -a installed_formulae
      fi ;;

    list|ls)
      _arguments \
        '(--unbrewed)--unbrewed[files in brew --prefix not controlled by brew]' \
        '(--pinned)--pinned[list all versions of pinned formulae]' \
        '(--versions)--versions[list all installed versions of a formula]' \
        '1: :->forms' && return 0
  
        if [[ "$state" == forms ]]; then
          _brew_installed_formulae
          _wanted installed_formulae expl 'installed formulae' compadd -a installed_formulae
        fi ;;
    remove|rm|uninstall|unlink|cleanup|link|ln|pin|unpin)
      _brew_installed_formulae
      _wanted installed_formulae expl 'installed formulae' compadd -a installed_formulae ;;
    search|-S)
      _arguments \
        '(--macports)--macports[search the macports repository]' \
        '(--fink)--fink[search the fink repository]' ;;

    untap|tap-info|tap-pin)

      _brew_installed_taps

      _wanted installed_taps expl 'installed taps' compadd -a installed_taps ;;
    tap)
      _brew_official_taps
      _wanted official_taps expl 'official taps' compadd -a official_taps ;;
    tap-unpin)
      _brew_pinned_taps
      _wanted pinned_taps expl 'pinned taps' compadd -a pinned_taps ;;

    upgrade)
      _brew_outdated_formulae
      _wanted outdated_formulae expl 'outdated formulae' compadd -a outdated_formulae ;;
  esac