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#
# Provides for an easier use of SSH by setting up ssh-agent.
#
# Authors:
# Sorin Ionescu <sorin.ionescu@gmail.com>
#
# Return if requirements are not found.
if (( ! $+commands[ssh-agent] )); then
return 1
fi
# Set the path to the SSH directory.
_ssh_dir="$HOME/.ssh"
# Set the path to the environment file if not set by another module.
_ssh_agent_env="${_ssh_agent_env:-${XDG_CACHE_HOME:-$HOME/.cache}/prezto/ssh-agent.env}"
# Set the path to the persistent authentication socket.
_ssh_agent_sock="${XDG_CACHE_HOME:-$HOME/.cache}/prezto/ssh-agent.sock"
# Start ssh-agent if not started.
if [[ ! -S "$SSH_AUTH_SOCK" ]]; then
# Export environment variables.
source "$_ssh_agent_env" 2> /dev/null
# Start ssh-agent if not started.
if ! ps -U "$LOGNAME" -o pid,ucomm | grep -q -- "${SSH_AGENT_PID:--1} ssh-agent"; then
mkdir -p "$_ssh_agent_env:h"
eval "$(ssh-agent | sed '/^echo /d' | tee "$_ssh_agent_env")"
fi
fi
# Create a persistent SSH authentication socket.
if [[ -S "$SSH_AUTH_SOCK" && "$SSH_AUTH_SOCK" != "$_ssh_agent_sock" ]]; then
mkdir -p "$_ssh_agent_sock:h"
ln -sf "$SSH_AUTH_SOCK" "$_ssh_agent_sock"
export SSH_AUTH_SOCK="$_ssh_agent_sock"
fi
# Load identities.
if ssh-add -l 2>&1 | grep -q 'The agent has no identities'; then
zstyle -a ':prezto:module:ssh:load' identities '_ssh_identities'
# ssh-add has strange requirements for running SSH_ASKPASS, so we duplicate
# them here. Essentially, if the other requirements are met, we redirect stdin
# from /dev/null in order to meet the final requirement.
#
# From ssh-add(1):
# If ssh-add needs a passphrase, it will read the passphrase from the current
# terminal if it was run from a terminal. If ssh-add does not have a terminal
# associated with it but DISPLAY and SSH_ASKPASS are set, it will execute the
# program specified by SSH_ASKPASS and open an X11 window to read the
# passphrase.
if [[ -n "$DISPLAY" && -x "$SSH_ASKPASS" ]]; then
ssh-add ${_ssh_identities:+$_ssh_dir/${^_ssh_identities[@]}} < /dev/null 2> /dev/null
else
ssh-add ${_ssh_identities:+$_ssh_dir/${^_ssh_identities[@]}} 2> /dev/null
fi
fi
# Clean up.
unset _ssh_{dir,identities} _ssh_agent_{env,sock}