Starting wez in, or with, a default mux session

[de-abreu]

What Operating System(s) are you running on?

Linux Wayland

Which Wayland compositor or X11 Window manager(s) are you using?

Gnome

WezTerm version

wezterm 0-unstable-2025-01-03

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To have session persistance, allowing me to close and open my terminal window freely, I used to attach the following fish script into my fish.config file:

# Log into an available tmux session
if set -q TMUX
    set -q TMUX_PLUGIN_MANAGER_PATH
    or tmux run "~/.tmux/plugins/tpm/tpm" # Loading tmux plugins ( not required here)
else
    if not tmux list-sessions | string match -qe (hostname):
        tmux new -s (hostname) # If there is no session named $hostname, create and attach to it.
    else if command realpath ~ | string match -q "$PWD"
        tmux attach -t (hostname) # Otherwise, if the terminal was opened from ~ attach to session $hostname.
    else
        tmux attach -t (hostname) -c "$PWD" \; new-window # Otherwise attach to session $hostname and move over to current location.
    end
    exit
end

I'm trying to achieve something like that using wezterm. I believe that it could be done using wezterm's lua configuration only? I'm trying to avoid such shennanigans now that I'm trying to move away from Tmux.