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#!/bin/sh

if [ $# -eq 1 ]; then
  selected="$1"
  [ -d "$1" ] || mkdir -p "$1"
else
  if ! [ -f ~/.tmus-dirs ]; then
    echo 'Please create ~/.tmus-dirs with desired search dirs'
    exit 1
  fi

  selected=$(find $(cat ~/.tmus-dirs) -mindepth 1 -maxdepth 1 -type d | fzf)
fi

if [ -z "$selected" ]; then
  exit 0
fi

selected_name=$(basename "$selected" | tr . _)
tmux_running=$(pgrep tmux)

if [ -z "$TMUX" ] && [ -z "$tmux_running" ]; then
  tmux new-session -s "$selected_name" -c "$selected"
  exit 0
fi

if ! tmux has-session -t="$selected_name" 2> /dev/null; then
  tmux new-session -ds "$selected_name" -c "$selected"
fi

if tmux list-sessions | grep -qs attached; then
  tmux switch-client -t "$selected_name"
else
  tmux attach-session -t "$selected_name"
fi