zsh_brew_completions

#compdef brew
# ------------------------------------------------------------------------------
# Description
# -----------
#
#  Completion script for brew (https://github.com/mxcl/homebrew).
#
#  Source: https://github.com/mxcl/homebrew/blob/master/Library/Contributions/brew_zsh_completion.zsh
#
# ------------------------------------------------------------------------------
# Authors
# -------
#
#  * kulakowski (https://github.com/kulakowski)
#  * Gabe Berke-Williams (https://github.com/gabebw)
#  * James Conroy-Finn (https://github.com/jcf)
#  * Daniel Schauenberg (https://github.com/mrtazz)
#  * Adam Vandenberg (https://github.com/adamv)
#  * Erik Kastner (https://github.com/kastner)
#
# ------------------------------------------------------------------------------
# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
# vim: ft=zsh sw=2 ts=2 et
# ------------------------------------------------------------------------------


_brew_all_formulae() {
  formulae=(`brew search`) # FIXME _call_program should be used here
}

_brew_installed_formulae() {
  installed_formulae=(`brew list`) # FIXME _call_program should be used here
}

local -a _1st_arguments
_1st_arguments=(
  'cat:display formula file for a formula'
  'cleanup:uninstall unused and old versions of packages'
  'create:create a new formula'
  'deps:list dependencies and dependants of a formula'
  'doctor:audits your installation for common issues'
  'edit:edit a formula'
  'home:visit the homepage of a formula or the brew project'
  'info:information about a formula'
  'install:install a formula'
  'link:link a formula'
  'list:list files in a formula or not-installed formulae'
  'log:git commit log for a formula'
  'missing:check all installed formulae for missing dependencies.'
  'outdated:list formulae for which a newer version is available'
  'prune:remove dead links'
  'remove:remove a formula'
  'search:search for a formula (/regex/ or string)'
  'server:start a local web app that lets you browse formulae (requires Sinatra)'
  'unlink:unlink a formula'
  'update:freshen up links'
  'upgrade:upgrade outdated formulae'
  'uses:show formulae which depend on a formula'
)

local expl
local -a formulae installed_formulae

_arguments \
  '(-v)-v[verbose]' \
  '(--cellar)--cellar[brew cellar]' \
  '(--config)--config[brew configuration]' \
  '(--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
  search|-S)
    _arguments \
      '(--macports)--macports[search the macports repository]' \
      '(--fink)--fink[search the fink repository]' ;;
  list|ls)
    _arguments \
      '(--unbrewed)--unbrewed[files in brew --prefix not controlled by brew]' \
      '(--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 ;;
  install|home|homepage|log|info|abv|uses|cat|deps|edit|options)
    _brew_all_formulae
    _wanted formulae expl 'all formulae' compadd -a formulae ;;
  remove|rm|uninstall|unlink|cleanup|link|ln)
    _brew_installed_formulae
    _wanted installed_formulae expl 'installed formulae' compadd -a installed_formulae ;;
esac