WSL SSH Agent Workaround

wsl-ssh-agent.sh

# Start ssh-agent if not started (WSL workaround)
# See: https://superuser.com/questions/1010542/how-to-make-git-not-prompt-for-passphrase-for-ssh-key-on-windows/1421619#1421619
env=~/.ssh/agent.env

agent_load_env () { test -f "$env" && . "$env" >| /dev/null ; }

agent_start () {
    (umask 077; ssh-agent >| "$env")
    . "$env" >| /dev/null ; }

agent_load_env

# agent_run_state: 0=agent running w/ key; 1=agent w/o key; 2= agent not running
agent_run_state=$(ssh-add -l >| /dev/null 2>&1; echo $?)

if [ ! "$SSH_AUTH_SOCK" ] || [ $agent_run_state = 2 ]; then
    agent_start
    ssh-add
elif [ "$SSH_AUTH_SOCK" ] && [ $agent_run_state = 1 ]; then
    ssh-add
fi

unset env
# End ssh-agent workaround