gpg-agent-wrapper

#!/bin/bash
GPG_CONNECT_AGENT=$(which gpg-connect-agent 2>/dev/null)
if [ -x "$GPG_CONNECT_AGENT" ]; then

    $GPG_CONNECT_AGENT /bye
    export SSH_AUTH_SOCK=$XDG_RUNTIME_DIR/gnupg/S.gpg-agent.ssh
    if [ ! -S $SSH_AUTH_SOCK ]; then
        # older versions of gpg-connect-agent put it in $HOME/.gnupg
        export SSH_AUTH_SOCK=$HOME/.gnupg/S.gpg-agent.ssh
    fi
else

  # Copyright (c) 2010 Diego E. Pettenò <flameeyes@gmail.com>
  # Available under CC-BY license (Attribution)

  if ! [ -f "${HOME}/.gpg-agent-info" ] ||
     ! pgrep -u ${USER} gpg-agent >/dev/null; then
     gpg-agent --daemon --enable-ssh-support --scdaemon-program /usr/libexec/scdaemon --use-standard-socket --log-file ~/.gnupg/gpg-agent.log --write-env-file
  fi

  # for ssh-agent forwarding, override gnome-keyring though!
  if [ -n ${SSH_AUTH_SOCK} ] && \
      [ ${SSH_AUTH_SOCK#/tmp/keyring-} = ${SSH_AUTH_SOCK} ]; then
      fwd_SSH_AUTH_SOCK=${SSH_AUTH_SOCK}
  fi

  export SSH_AUTH_SOCK

  if [ "${fwd_SSH_AUTH_SOCK}" != "" ]; then
      SSH_AUTH_SOCK=${fwd_SSH_AUTH_SOCK}
      export SSH_AUTH_SOCK
  fi

  source ${HOME}/.gpg-agent-info
  export GPG_AGENT_INFO
  export SSH_AGENT_PID

  GPG_TTY=$(tty)
  export GPG_TTY
fi