Ssh agent bashrc amendment

# 2020-10-30 FRI - work to configure ssh-agent per gitbash session:

LOCAL_VAR_SSH_AGENT_RUNNING_PROCESS_COUNT=$(ps -u $USERNAME | grep agent | wc | awk '{print $1}')
LOCAL_VAR_SSH_AGENT_VARS_FILENAME="z--ssh-agent-env-vars.txt"

echo "Checking for ssh-agent daemon process:"

if [ $LOCAL_VAR_SSH_AGENT_RUNNING_PROCESS_COUNT -ne 0 ]; then
    echo "Found one or more ssh-agent processes running,"
    if [ -e $LOCAL_VAR_SSH_AGENT_VARS_FILENAME ]; then
        echo "Reading env variables relating to earliest started ssh-agent instance..."
        var1=$(cat $LOCAL_VAR_SSH_AGENT_VARS_FILENAME | sed -n '1p')
        var2=$(cat $LOCAL_VAR_SSH_AGENT_VARS_FILENAME | sed -n '2p')
        echo "exporting $var1 to SSH_AGENT_PID env var..."
        export SSH_AGENT_PID=$var1
        echo "exporting $var2 to SSH_AUTH_SOCK env var..."
        export SSH_AUTH_SOCK=$var2
    else
        echo "but no locally written environment vars found!"
    fi
else
    echo "none found, starting..."
    eval $(/usr/bin/ssh-agent -s)
    /usr/bin/ssh-add $HOME/.ssh/id-ed25519-key
    var3=$(set | grep SSH_AGENT_PID | cut -d'=' -f 2)
    var4=$(set | grep SSH_AUTH_SOCK | cut -d'=' -f 2)
    echo "var3 holds $var3"
    echo "var4 holds $var4"
    echo "Writing these variables to file for future Gitbash shell instances to read..."
    echo $var3 > $LOCAL_VAR_SSH_AGENT_VARS_FILENAME
    echo $var4 >> $LOCAL_VAR_SSH_AGENT_VARS_FILENAME
fi


echo "done."



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