#!/bin/sh

# Show system info each time a shell is started ...


# ... except:
[ -t 1 ] || return                  # If stdout is not a terminal
[ "${SHLVL:-1}" -gt 1 ] && return   # In nested shells (e.g., ":terminal" in `vi`)
[ "${TERM:-}" = "dumb" ] && return  # For tools opening shells (e.g., `emacs`)


_hostname=$(uname -n)
_os="$(uname -s) $(uname -r)"
_user=$(whoami)
_work_dir=$(echo "$PWD" | sed "s|^$HOME|~|")


if [ "$(id -u)" -eq 0 ]; then
    _prompt="#"
else
    _prompt="$"
fi


if [ -n "${SSH_CLIENT:-}" ] || [ -n "${SSH_TTY:-}" ]; then
    _remote="  ssh"
else
    _remote="  local"
fi


if _in_bash; then
    _shell_type="bash"
elif _in_zsh; then
    _shell_type="zsh"
else
    _shell_type="non-bash/zsh shell"
fi


_info_line="$_user@$_hostname:$_work_dir$_prompt$_remote  $_os  $_shell_type"
_sep_line=$(echo "$_info_line" | sed 's/./─/g')


echo ""
echo "$_sep_line"
echo "$_info_line"
echo "$_sep_line"
echo ""


unset _hostname _os _user _work_dir _prompt _remote _shell_type _info_line _sep_line