quick tmux shell env

default.nix

with import <nixpkgs> {};

stdenv.mkDerivation rec {
  name = "dev-env";
  env = pkgs.buildEnv {
    name = name;
    paths = buildInputs;
  };
  buildInputs = [
    (vim_configurable.override {
        features = "huge";
        python = python3;
    })
    tmux
    zsh
    oh-my-zsh
  ];
  shellHook = ''
        	if [ ! -e $HOME/.zshrc ]; then
        		cat > $HOME/.zshrc <<-EOF
        			export ZSH="${pkgs.oh-my-zsh}/share/oh-my-zsh/"
        			export ZSH_THEME=cloud
        			plugins=(git)
        			source \$ZSH/oh-my-zsh.sh
        		EOF
        	fi
        	if [ ! -e $HOME/.tmux.conf ]; then
        		cat > $HOME/.tmux.conf <<-EOF
        			set -g history-limit 10000
        			set-option -g default-shell ${pkgs.zsh}/bin/zsh
        		EOF
        	fi
        	if [ $(tmux list-sessions 2>/dev/null | wc -l) -eq 0 ]; then
        		tmux
        	else
        		tmux a
        	fi
  '';
}