#!/usr/bin/env bash
# Start (or reuse) the tmux server with a session named "main".
# Used by the tmux-main systemd user service at graphical login.
#
# Designed to survive Restart=on-failure: if a session already exists this
# script reattaches nothing and exits 0; if the server dies systemd restarts
# us and we recreate the session.
set -u

session=main

if ! tmux ls 2>/dev/null | grep -q "^${session}:"; then
  tmux new-session -d -s "$session"
fi

# Keep the unit "active" only briefly; the session lives in the tmux server.
exit 0