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prezto/modules/ssh-agent/init.zsh
2012-04-09 17:45:32 -04:00

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#
# Provides for an easier use of ssh-agent.
#
# Authors:
# Robby Russell <robby@planetargon.com>
# Theodore Robert Campbell Jr <trcjr@stupidfoot.com>
# Joseph M. Reagle Jr. <reagle@mit.edu>
# Florent Thoumie <flz@xbsd.org>
# Jonas Pfenniger <jonas@pfenniger.name>
# gwjo <gowen72@gmail.com>
# Sorin Ionescu <sorin.ionescu@gmail.com>
#
# Usage:
# To enable agent forwarding, add the following to your .zshrc:
#
# zstyle ':omz:module:ssh-agent' forwarding 'yes'
#
# To load multiple identities, add the following to your .zshrc:
#
# zstyle ':omz:module:ssh-agent' identities 'id_rsa' 'id_rsa2' 'id_github'
#
if (( ! $+commands[ssh-agent] )); then
return 1
fi
_ssh_agent_env="${HOME}/.ssh/environment-${HOST}"
_ssh_agent_forwarding=
function _ssh-agent-start {
local -a identities
# Start ssh-agent and setup the environment.
rm -f "${_ssh_agent_env}"
ssh-agent > "${_ssh_agent_env}"
chmod 600 "${_ssh_agent_env}"
source "${_ssh_agent_env}" > /dev/null
# Load identities.
zstyle -a ':omz:module:ssh-agent' identities 'identities'
if (( ${#identities} > 0 )); then
ssh-add "${HOME}/.ssh/${^identities[@]}"
else
ssh-add
fi
}
# Test if agent-forwarding is enabled.
zstyle -b ':omz:module:ssh-agent' forwarding '_ssh_agent_forwarding'
if is-true "${_ssh_agent_forwarding}" && [[ -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 "${_ssh_agent_env}" ]; then
# Source SSH settings, if applicable.
source "${_ssh_agent_env}" > /dev/null
ps -ef | grep "${SSH_AGENT_PID}" | grep -q 'ssh-agent$' || {
_ssh-agent-start;
}
else
_ssh-agent-start;
fi
# Tidy up after ourselves.
unfunction _ssh-agent-start
unset _ssh_agent_{env,forwarding}