ssh agent for fish

ssh_agent_start.fish

#this script can never fail
#i use it in the fish_config
#call it with start_agent

setenv SSH_ENV $HOME/.ssh/environment


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
    		echo "Initializing new SSH agent ..."
	        ssh-agent -c | sed 's/^echo/#echo/' > $SSH_ENV
    		echo "succeeded"
		chmod 600 $SSH_ENV 
		. $SSH_ENV > /dev/null
    		ssh-add
	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

Yet another solution https://github.com/ivakyb/fish_ssh_agent