Create script $HOME/bin/ssh-agent-start.sh:

### ssh-agent startup

environ="$HOME/.ssh/agent.env"

# start ssh-agent if not running
AGENT_PID=$(pgrep ssh-agent)
if [ $? -ne 0 ]; then
    (umask 077; ssh-agent > "$environ")
    #ssh-add
    echo "-- SSH Agent started (PID: $SSH_AGENT_PID)"
else
    echo "-- SSH Agent already running (PID: $AGENT_PID)"
fi

# set environment
if [ -f "$environ" ]; then
    . "$environ" >/dev/null
    echo "-- SSH Agent environment set"
fi

Add this line at the end on $HOME/.bashrc:

. $HOME/bin/ssh-agent-start.sh

Add this line to $HOME/.ssh/config

AddKeysToAgent yes

Open a new window on Cygwin. It will automatically start the ssh-agent. The keys will be cached when ssh is run for the first time.

Thanks for reading.

-fnds

References

https://superuser.com/questions/1125803/whats-the-best-way-to-start-ssh-agent-with-cygwin
https://superuser.com/questions/1173569/ssh-agent-setup-on-windows-with-cygwin

mic68.com

SSH Agent Auto Startup on Cygwin

References