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Smart session manager for the terminal

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Sesh, the smart terminal session manager

tests goreport

Sesh is a CLI that helps you create and manage tmux sessions quickly and easily using zoxide.

Watch the video to learn more about how to use sesh to manage your tmux sessions.

How to install

Homebrew

To install sesh, run the following homebrew command:

brew install joshmedeski/sesh/sesh

ArchLinux AUR

To install sesh using, run the following yay command:

yay -S sesh-bin

Go

Alternatively, you can install Sesh using Go's go install command:

go install github.com/joshmedeski/sesh@latest

This will download and install the latest version of Sesh. Make sure that your Go environment is properly set up.

Nix

See the nix package directory for instructions on how to install sesh through the nix platform.

Note: Do you want this on another package manager? Create an issue and let me know!

Raycast Extension

The sesh companion extension for Raycast makes it easy to use sesh outside of the terminal.

Here are limitations to keep in mind:

  • tmux has to be running before you can use the extension
  • The extension caches results for a few seconds, so it may not always be up to date

How to use

tmux for sessions

tmux is a powerful terminal multiplexer that allows you to create and manage multiple terminal sessions. Sesh is designed to make managing tmux sessions easier.

zoxide for directories

zoxide is a blazing fast alternative to cd that tracks your most used directories. Sesh uses zoxide to manage your projects. You'll have to set up zoxide first, but once you do, you can use it to quickly jump to your most used directories.

Basic usage

Once tmux and zoxide are setup, sesh list will list all your tmux sessions and zoxide results, and sesh connect {session} will connect to a session (automatically creating it if it doesn't exist yet). It is best used by integrating it into your shell and tmux.

fzf

The easiest way to integrate sesh into your workflow is to use fzf. You can use it to select a session to connect to:

sesh connect $(sesh list | fzf)

tmux + fzf

In order to integrate with tmux, you can add a binding to your tmux config (tmux.conf). For example, the following will bind ctrl-a T to open a fzf prompt as a tmux popup (using fzf-tmux) and using different commands to list active sessions (sesh list -t), configured sessions (sesh list -c), zoxide directories (sesh list -z), and find directories (fd...).

bind-key "T" run-shell "sesh connect \"$(
	sesh list | fzf-tmux -p 55%,60% \
		--no-sort --ansi --border-label ' sesh ' --prompt '⚑  ' \
		--header '  ^a all ^t tmux ^g configs ^x zoxide ^d tmux kill ^f find' \
		--bind 'tab:down,btab:up' \
		--bind 'ctrl-a:change-prompt(⚑  )+reload(sesh list)' \
		--bind 'ctrl-t:change-prompt(πŸͺŸ  )+reload(sesh list -t)' \
		--bind 'ctrl-g:change-prompt(βš™οΈ  )+reload(sesh list -c)' \
		--bind 'ctrl-x:change-prompt(πŸ“  )+reload(sesh list -z)' \
		--bind 'ctrl-f:change-prompt(πŸ”Ž  )+reload(fd -H -d 2 -t d -E .Trash . ~)' \
		--bind 'ctrl-d:execute(tmux kill-session -t {})+change-prompt(⚑  )+reload(sesh list)'
)\""

You can customize this however you want, see man fzf for more info on the different options.

gum + tmux

If you prefer to use charmblacelet's gum then you can use the following command to connect to a session:

bind-key "K" display-popup -E -w 40% "sesh connect \"$(
	sesh list -i | gum filter --limit 1 --placeholder 'Pick a sesh' --height 50 --prompt='⚑'
)\""

Note: There are less features available with gum compared to fzf, but I found its matching algorithm is faster and it ha a more modern feel.

See my video, Top 4 Fuzzy CLIs for more inspiration for tooling that can be integrated with sesh.

zsh keybind

If you use zsh, you can add the following keybind to your .zshrc to connect to a session:

function sesh-sessions() {
  {
    exec </dev/tty
    exec <&1
    local session
    session=$(sesh list -t -c | fzf --height 40% --reverse --border-label ' sesh ' --border --prompt '⚑  ')
    [[ -z "$session" ]] && return
    sesh connect $session
  }
}

zle     -N             sesh-sessions
bindkey -M emacs '\es' sesh-sessions
bindkey -M vicmd '\es' sesh-sessions
bindkey -M viins '\es' sesh-sessions

After adding this to your .zshrc, you can press Alt-s to open a fzf prompt to connect to a session.

Recommended tmux Settings

I recommend you add these settings to your tmux.conf to have a better experience with this plugin.

bind-key x kill-pane # skip "kill-pane 1? (y/n)" prompt
set -g detach-on-destroy off  # don't exit from tmux when closing a session

Bonus: sesh last

The default <prefix>+L command will "Switch the attached client back to the last session." However, if you close a session while detach-on-destroy off is set, the last session will not be found. To fix this, I have a sesh last command that will always switch the client to the second to last session that has been attached.

Add the following to your tmux.conf to overwrite the default last-session command:

bind -N "last-session (via sesh) " L run-shell "sesh last"

Configuration

You can configure sesh by creating a sesh.toml file in your $XDG_CONFIG_HOME/sesh or $HOME/.config/sesh directory.

mkdir -p ~/.config/sesh && touch ~/.config/sesh/sesh.toml

Default Session

The default session can be configured to run a command when connecting to a session. This is useful for running a dev server or starting a tmux plugin.

[default_session]
startup_command = "nvim -c ':Telescope find_files'"

Session Configuration

A startup command is a command that is run when a session is created. It is useful for setting up your environment for a given project. For example, you may want to run npm run dev to automatically start a dev server.

Note: If you use the --command/-c flag, then the startup script will not be run.

I like to use a command that opens nvim on session startup:

[[session]]
name = "Downloads πŸ“₯"
path = "~/Downloads"
startup_command = "ls"

[[session]]
name = "tmux config"
path = "~/c/dotfiles/.config/tmux"
startup_command = "nvim tmux.conf"

Listing Configurations

Session configurations will load by default if no flags are provided (the return after tmux sessions and before zoxide results). If you want to explicitly list them, you can use the -c flag.

sesh list -c

Set the file as an executable and it will be run when you connect to the specified session.

Background (the "t" script)

Sesh is the successor to my popular t-smart-tmux-session-manager tmux plugin. After a year of development and over 250 stars, it's clear that people enjoy the idea of a smart session manager. However, I've always felt that the tmux plugin was a bit of a hack. It's a bash script that runs in the background and parses the output of tmux commands. It works, but it's not ideal and isn't flexible enough to support other terminal multiplexers.

I've decided to start over and build a session manager from the ground up. This time, I'm using a language that's more suited for the task: Go. Go is a compiled language that's fast, statically typed, and has a great standard library. It's perfect for a project like this. I've also decided to make this session manager multiplexer agnostic. It will be able to work with any terminal multiplexer, including tmux, zellij, Wezterm, and more.

The first step is to build a CLI that can interact with tmux and be a drop-in replacement for my previous tmux plugin. Once that's complete, I'll extend it to support other terminal multiplexers.

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