gistfile1.sh

hcd() {
  cd "$HASHROCKET_DIR/$1"
}

if [ -n "$BASH_VERSION" ]; then
  _hcd()
  {
    local cur projects

    [ -r "$HASHROCKET_DIR" ] || return 0

    COMPREPLY=()
    cur=${COMP_WORDS[COMP_CWORD]}
    projects=$(\ls "$HASHROCKET_DIR")

    if [ $COMP_CWORD -eq 1 ]; then
      COMPREPLY=( $(compgen -o filenames -W "$projects" $cur) )
    fi

    return 0
  }
  complete -F _hcd hcd
elif [ -n "$ZSH_VERSION" ]; then
  #compdef '_files -W "$HASHROCKET_DIR"' hcd
  compctl -/ -W "$HASHROCKET_DIR" hcd
fi