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.dotfiles/tmux/scripts/tmux-ssher

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#!/usr/bin/env bash
# open (or switch to) a tmux session running ssh to a host
# tmux-ssher [host [luks]]
if [[ $# -ge 1 ]]; then
host=$1
profile=${2:-}
else
IFS=$'\t' read -r host profile < <(~/.config/bin/ssh-menu -s)
fi
if [[ -z $host ]]; then
exit 0
fi
# session names cannot contain . or :
name=${host//[.:]/_}
# an unlock session is short-lived and must not collide with a live ssh session
if [[ $profile == luks ]]; then
session="unlock_$name"
args=(-P luks "$host")
else
session="ssh_$name"
args=("$host")
fi
# on failure keep the window until enter, so the error stays readable (e.g.
# publickey denied because the yubikey is not inserted); tmux.conf's
# detach-on-destroy then returns to the previous session. bash, not the tmux
# default shell, so read -p behaves
cmd="bash -c 'ssh \"\$@\" || { rc=\$?; echo; read -rp \"ssh exited \$rc, press enter to close \"; }' _$(printf ' %q' "${args[@]}")"
if ! tmux has-session -t="$session" 2>/dev/null; then
tmux new-session -ds "$session" -n "$host" "$cmd"
# tmux.conf's c / " / % bindings read this to open more panes on the same host
if [[ $profile != luks ]]; then
tmux set-option -t "=$session:" @ssh_host "$host"
fi
fi
if [[ -z $TMUX ]]; then
tmux attach-session -t "=$session"
else
tmux switch-client -t "=$session"
fi