fish - launch ssh-agent, if it doesn't exist

launch-ssh-agent.fish

#
# launch-ssh-agenet
#
function __lsa_get-sshenv
  if set -q SSHENV
    echo $SSHENV
  else
    echo $HOME/.ssh/.sshenv
  end
end

function __lsa_source-sshenv
  set -l SSHENV (__lsa_get-sshenv)

  if test -e $SSHENV
    source $SSHENV > /dev/null
  else
    set -g SSH_AGENT_PID "NOPID"
    set -g SSH_AUTH_SOCK "NOSOCK"
  end
end

function __lsa_validate-sshenv
  __lsa_source-sshenv

  if pgrep -u $USER ssh-agent | grep -q -w $SSH_AGENT_PID
    return 0
  else
    return 1
  end
end

function launch-ssh-agent --description="Launch ssh-agent if not exists"
  if not __lsa_validate-sshenv
    set -l SSHENV (__lsa_get-sshenv)
    ssh-agent -c > $SSHENV
  end

  __lsa_source-sshenv
end

launch-ssh-agent