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prezto/plugins/ssh-agent/ssh-agent.plugin.zsh

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#
# INSTRUCTIONS
#
# To enabled agent forwarding support, add the following to
# your .zshrc file:
#
# zstyle :omz:plugins:ssh-agent agent-forwarding on
#
# To load multiple identies, use the identities style, For
# example:
#
# zstyle :omz:plugins:ssh-agent id_rsa id_rsa2 id_github
#
#
# CREDITS
#
# Based on code from Joseph M. Reagle
# http://www.cygwin.com/ml/cygwin/2001-06/msg00537.html
#
# Agent forwarding support based on ideas from
# Florent Thoumie and Jonas Pfenniger
#
_ssh_agent_env="$HOME/.ssh/environment-$HOST"
_ssh_agent_forwarding=
function _ssh-agent-start() {
local -a identities
# Start ssh-agent and setup environment.
/usr/bin/env ssh-agent | sed 's/^echo/#echo/' > "${_ssh_agent_env}"
chmod 600 "${_ssh_agent_env}"
source "${_ssh_agent_env}" > /dev/null
# Load identies.
zstyle -a :omz:plugins:ssh-agent identities identities
echo starting...
/usr/bin/ssh-add "$HOME/.ssh/${^identities}"
}
# Test if agent-forwarding is enabled.
zstyle -b :omz:plugins:ssh-agent agent-forwarding _ssh_agent_forwarding
if [[ "${_ssh_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 "${_ssh_agent_env}" ]; then
# Source SSH settings, if applicable.
source "${_ssh_agent_env}" > /dev/null
ps -ef | grep "${SSH_AGENT_PID}" | grep ssh-agent$ > /dev/null || {
_ssh-agent-start;
}
else
_ssh-agent-start;
fi
# Tidy up after ourselves.
unfunction _ssh-agent-start
unset _ssh_agent_forwarding
unset _ssh_agent_env