ssh-agent oh-my-zsh plugin for termux

ssh-agent.plugin.zsh

typeset _agent_forwarding _ssh_env_cache

function _clear_agent() {
	rx="^ssh-"
	tmp="/data/data/com.termux/files/usr/tmp"
	_ssh_env_cache="$HOME/.ssh/environment-$SHORT_HOST"
	. $_ssh_env_cache > /dev/null
	SSH_CHECK_AGENT_PID=$(ps x | grep ssh-agent | grep -v "grep " | awk '{print $1}')
	if [[ -z $SSH_CHECK_AGENT_PID || $SSH_CHECK_AGENT_PID != $SSH_AGENT_PID ]]; then
		if [[ -e $_ssh_env_cache ]]; then 
			if [[ ! -z $SSH_CHECK_AGENT_PID ]]; then killall -9 ssh-agent; fi
			rm $_ssh_env_cache
		fi
	fi
	if [[ $SSH_CHECK_AGENT_PID = $SSH_AGENT_PID ]]; then
		#echo ssh-agent found...
	else
		for f in $(ls $tmp); do
			if [[ -d $f && $f =~ $rx ]]; then rm -rf "${tmp}/${f}"; fi
		done
	fi
	unset _ssh_env_cache
}

function _start_agent() {
	local lifetime
	local -a identities

	# start ssh-agent and setup environment
	zstyle -s :omz:plugins:ssh-agent lifetime lifetime

	ssh-agent -s ${lifetime:+-t} ${lifetime} | sed 's/^echo/#echo/' >! $_ssh_env_cache
	chmod 600 $_ssh_env_cache
	. $_ssh_env_cache > /dev/null

	# load identities
	zstyle -a :omz:plugins:ssh-agent identities identities

	echo starting ssh-agent...
	ssh-add $HOME/.ssh/${^identities}
}

_clear_agent

# Get the filename to store/lookup the environment from
_ssh_env_cache="$HOME/.ssh/environment-$SHORT_HOST"

# test if agent-forwarding is enabled
zstyle -b :omz:plugins:ssh-agent agent-forwarding _agent_forwarding

if [[ $_agent_forwarding == "yes" && -n "$SSH_AUTH_SOCK" ]]; then
	# Add a nifty symlink for screen/tmux if agent forwarding
	[[ -L $SSH_AUTH_SOCK ]] || ln -sf "$SSH_AUTH_SOCK" /tmp/ssh-agent-$USER-screen
elif [[ -f "$_ssh_env_cache" ]]; then
	# Source SSH settings, if applicable
	. $_ssh_env_cache > /dev/null
	ps x | grep ssh-agent | grep -v "grep " | grep -q $SSH_AGENT_PID || {
		_start_agent
	}
else
	_start_agent
fi

# tidy up after ourselves
unset _agent_forwarding _ssh_env_cache
unfunction _start_agent
unfunction _clear_agent