Boot a SSH agent for Fish

start_agent.fish

set -gx SSH_ENV $HOME/.ssh/environment

function boot_new_agent
	echo "Initializing new SSH agent..."
	ssh-agent -c | sed 's/^echo/#echo/' > $SSH_ENV
	echo "SSH agent initialized, ready to roll."
	chmod 600 $SSH_ENV
	. $SSH_ENV > /dev/null
	ssh-add
end

function start_agent
	if [ -n "$SSH_AGENT_PID" ]
		ps -ef | grep $SSH_AGENT_PID | grep ssh-agent > /dev/null
		if [ $status -eq 0 ]
			test_identities
		end
	else
		if [ -f $SSH_ENV ]
			. $SSH_ENV > /dev/null
		end

		ps -ef | grep $SSH_AGENT_PID | grep -v grep | grep ssh-agent > /dev/null

		if [ $status -eq 0 ]
			test_identities
		else
			boot_new_agent
		end
	end
end

function test_identities
	ssh-add -l | grep "The agent has no identities" > /dev/null
	if [ $status -eq 0 ]
		ssh-add
		if [ $status -eq 2 ]
			start_agent
		end
	end
end

function fish_title
	if [ $_ = 'fish' ]
		echo (prompt_pwd)
	else
		echo $_
	end
end