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#!/usr/bin/env bash
#
# Worktemux: tmux session wrapper
# https://robots.thoughtbot.com/a-tmux-crash-course
#
# Alternatives:
# https://github.com/tmuxinator/tmuxinator
# https://github.com/tony/tmuxp
# https://github.com/tmux-plugins/tpm
# https://github.com/tmux-plugins/tmux-resurrect
# https://github.com/tmux-plugins/tmux-continuum
# https://superuser.com/questions/440015/restore-tmux-session-after-reboot
# Default options.
opts=""
name="$1"
state="$2"
socket="-L${name}"
# Session selection.
if [ ! -z "${name}" ]; then
if [ "${name}" = "root" ]; then
sudo tmux attach
exit
fi
if ! tmux ${socket} list-sessions 2> /dev/null | grep -q "^${name}:"; then
session="new-session -d -s ${name}"
# Use a unique, per-session name
#session="${session} -t ${name}"
# Ensure there's a separate server running for each session.
#
# This achieves session isolation by using a unique socket per session.
#
# This solves tmux creating too many environment variables and triggering
# the following error when using programs such as "less" and "ranger":
#
# Error: too many environment variables: >= MAX_ENVS (256)
#
# For a list of tmux environment variables available within a session,
# type "env | grep TMUX".
#
# Reference:
# https://github.com/tmux/tmux/wiki/Advanced-Use
session="${socket} ${session}"
if [ -f "$HOME/.tmux/${name}" ]; then
opts="$HOME/.tmux/${name}"
elif [ -f "$HOME/.tmux/base" ]; then
opts="$HOME/.tmux/base"
else
opts=""
fi
# Start session.
if [ ! -z "${opts}" ]; then
tmux ${session} \; source-file ${opts}
else
tmux ${session}
fi
fi
if [ "$state" != "detached" ]; then
tmux ${socket} attach -t ${name}
fi
else
tmux
fi
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