x

#! /bin/sh

DEFAULT_SESSION=main

if [ "$1" = "--help" ] || [ "$1" = "-h" ] || [ "$1" = "help" ]; then
  printf "$ t [session]
Attach to a tmux session or create it if it doesn't exist.

If no parameter given attach to the default session ($DEFAULT_SESSION).

Parameters:
  [\$1]: session to attach to
  [\$2]: command to run (only for new sessions), to be used for scripting

Example:
  $ t main
  $ t code vim
"; exit
fi

command -v tmux >/dev/null || { echo "tmux is not installed"; exit 1; }

SESSION="$1"
if [ -z "$SESSION" ]; then
  SESSION="$DEFAULT_SESSION"
fi
CMD="$2"

CD="" # depending on session name set a default path to cd to
case "$SESSION" in
  code|dev|js|ts) CD="-c $HOME/code";;
  uni) CD="-c $HOME/projects/uni";;
esac

if tmux list-sessions 2>/dev/null | cut -d: -f1 | grep "^$SESSION$" >/dev/null; then
  tmux -u attach -t "$SESSION"
else
  if [ -n "$CMD" ]; then
    tmux -u new -s "$SESSION" $CD \; send-keys "$CMD" 'Enter'
  else
    tmux -u new -s "$SESSION" $CD
  fi
fi

# -u for UTF-8 even if the correct ENV variables are missing