zellij-sessionizer: ThePrimeagen/tmux-sessionizer but for zellij

zellij-sessionizer

#!/usr/bin/env bash

# set your own root folders, all children folders will become options for in sessionizer menu
root_folders="$HOME/projects $HOME/work $HOME/.config"

function attach_session() {
    local session_root=$1
    local session_name=$(basename "$session_root" | tr . _)
    cd $session_root
    zellij attach --create $session_name
}

quit_option="=== Quit sessionizer ==="
last_session=""
while true; do
    selected_option=$( (echo $quit_option && find $root_folders -mindepth 1 -maxdepth 1 -type d) | fzf)

    if [[ $selected_option == $quit_option ]]; then
        exit 0
    fi
    
    if [[ -z $selected_option && -z $last_session ]]; then
        exit 0
    fi

    if [[ -z $selected_option ]]; then
        attach_session $last_session
    else
        last_session=$selected_option
        attach_session $selected_option
    fi
done

My version: zellij-sessionizer
thanks to @ryanhuanli for inspiration zellij-org/zellij#884 (comment)
here's my version for another use case:

• it's implementation of ThePrimeagen tmux-sessionizer https://github.com/ThePrimeagen/.dotfiles/blob/602019e902634188ab06ea31251c01c1a43d1621/bin/.local/scripts/tmux-sessionizer . I short, it allows to create sessions in predefined set of folders, like all children folders in ~/projects, ~/.config ~/work.
• so in select screen I need completely different approach, I don't show currently existing sessions or controls to create new empty session, who needs it anyway?
• not selecting anything (Esc or Ctrl-C): will restore previous session

difference from tmux-sessionizer comes from script running as a wrapper for zellij:

• obvious for those who read this thread:
  • this script is zellij manager, user starts this script and it's running zellij for you
  • to switch sessions, user just need to detach from current zellij session, instead of terminal he will see sessionizer menu to select folder for new session
• I'm adding menu item Quit that will terminate zellij-sessionizer - the only way to terminate script otherwise is to kill it.

Found one bug(?)

• Invoke script
• Pick a directory in the list
• exit zellij with $ exit
• Fzf is still open?
• Pressing <Esc> doesn't close menu.

@Lilja to Quit fzf, you need to select bottom option - === Quit sessionizer ===
What you point out is why this script exists. Zellij doesn't support switching sessions, so this script emulate it. By exiting Zellij you end up in project picker to select another project and open its session or create new one.

In the end I abandoned using Zellij, why:

1. must have for me, that's impossible to emulate in Zellij:
   • tmux provides nice way for fast switching between current and previous session
   • fzf is running inside tmux, so if I change my mind, I can just press Esc to return to current session
2. nice things:
   • tmux covers all my needs or Zellij doesn't provide anything new, that's useful for me
   • I don't like Zellij view: all this green frames or lines, and I don't see easy way to customize it
   • I don't like keybinding: there're a lot of them and they conflict with what I set in Vim, so I need to always keep Zellij in locked mode and modify keybinding for all mode transitions: a lot of work, complex custom config. I don't see a need in all these mode transitions in the first place