# add to .bashrc

# Set up ssh-agent
SSH_ENV="$HOME/.ssh/environment"

function start_ssh_agent {
    echo "Initializing new SSH agent..."
    touch $SSH_ENV
    chmod 600 "${SSH_ENV}"
    /usr/bin/ssh-agent | sed 's/^echo/#echo/' >> "${SSH_ENV}"
    . "${SSH_ENV}" > /dev/null
    # the next line can be removed if you don't want to be prompted for a passphrase start
    /usr/bin/ssh-add
}

function kill_ssh_agent {
    bash_count=$(pgrep -c bash)
    if [ $bash_count -gt 2 ]; then
        # don't kill agent when there's still a bash shell running;
        # because this function will be executed inside a bash shell,
        # pgrep will find *2* bash processes when exiting the last real bash
        true
    else
        # do kill agent since this is the last bash
        eval $(ssh-agent -k)
        rm "${SSH_ENV}"
    fi
}

# Source SSH settings, if applicable
if [ -f "${SSH_ENV}" ]; then
    . "${SSH_ENV}" > /dev/null
    kill -0 $SSH_AGENT_PID 2>/dev/null || {
        start_ssh_agent
    }
else
    start_ssh_agent
fi

trap kill_ssh_agent EXIT