git_autocomplete

_gitcomp(){
  local cur prev branches
  cur=${COMP_WORDS[COMP_CWORD]}
  prev=${COMP_WORDS[COMP_CWORD-1]}
  branches="$(git branch 2> /dev/null | sed 's/\*//g')"
  gitfiles="$(git status -s 2> /dev/null | sed 's/^...//g')"
  case ${COMP_CWORD} in
    1)
      COMPREPLY=($(compgen -W "`_all_git_commands`" -- ${cur}));;
    2)
      case ${prev} in
        checkout)
          COMPREPLY=($(compgen -W "$branches" -- ${cur}));;
        ad|add|select|pick|discard|di|diff|reset|unadd|preview|pr)
          COMPREPLY=($(compgen -W "$gitfiles" -- ${cur}));;
      esac;;
    *)
      case ${COMP_WORDS[1]} in
        branch)
          COMPREPLY=($(compgen -W "$branches" -- ${cur}));;
      esac
  esac
}

_all_git_commands(){
  # get normal commands
  for i in `git help -a|egrep '^  [a-zA-Z0-9]'`; do
    # filter out boring stuff
    case $i in
      *--*)               ;;
      am)                 ;;
      cat-file)           ;;
      check-*)            ;;
      column)             ;;
      commit-tree)        ;;
      count-object)       ;;
      credential*)        ;;
      daemon)             ;;
      diff-*)             ;;
      fast-*)             ;;
      fetch-*)            ;;
      fmt-merge-msg)      ;;
      for-each-ref)       ;;
      fsck-objects)       ;;
      hash-object)        ;;
      http-*)             ;;
      index-pack)         ;;
      init-db)            ;;
      interpret-trailers) ;;
      ls-*)               ;;
      mail*)              ;;
      merge-*)            ;;
      mktag)              ;;
      mktree)             ;;
      pack-*)             ;;
      patch-id)           ;;
      prune*)             ;;
      quiltimport)        ;;
      read-tree)          ;;
      receive-pack)       ;;
      remote-*)           ;;
      rerere)             ;;
      rev-*)              ;;
      send-pack)          ;;
      shell)              ;;
      show-index)         ;;
      show-ref)           ;;
      stripspace)         ;;
      symoblic-ref)       ;;
      unpack-*)           ;;
      update-*)           ;;
      upload*)            ;;
      var)                ;;
      verify-*)           ;;
      write-tree)         ;;
      *)                  echo $i;;
    esac;
  done
  # get aliased commands
  for i in `git config --name-only --get-regexp "^alias\..*"`; do
    echo "${i#alias.}"
  done
}

complete -o default -F _gitcomp git