an init function for https://github.com/zsh-users/antigen

.zshrc

initAntigen() {

  antigenHome="${HOME}/.antigen"
  antigenConfig="${antigenHome}/antigen.zsh"

  if [[ -f ${antigenConfig} ]] ; then
  else

    echo
    echo "antigen.zsh not currently installed in ${antigenHome}"
    echo "downloading and installing antigen.zsh to ${antigenConfig}"
    echo

    mkdir -p ${antigenHome}
    curl -L https://raw.githubusercontent.com/zsh-users/antigen/master/antigen.zsh > ${antigenConfig}

    if [[ $? = 1 ]] ; then
      echo "error: could not source ${antigenConfig}"
      exit 1
    fi

  fi

  source ${antigenConfig}
}

# Initialize antigen
initAntigen

# Load the oh-my-zsh's library, bundles, etc
# antigen use oh-my-zsh