nix/home-manager/common/desktops/hyprland/assets/waybar/scripts.nix

{...}: {
    home.file = {
        ".config/waybar/scripts/tailscale.sh" = {
            enable = true;
            executable = true;
            text = ''
                #!/usr/bin/env bash
                CLASS=`tailscale status --json | fx . '.BackendState'`
                # Known values:  Running, Stopped

                # Expected Output:
                # {"text": "$text", "alt": "$alt", "tooltip": "$tooltip", "class": "$class", "percentage": $percentage }
                # Different $Class depending on if TS is running or not
                if [ $CLASS == "Running" ]; then
                    IP=`tailscale status --json | fx . '.TailscaleIPs[0]'`
                    TOOLTIP="IP:  $IP"
                    printf '{"class": "%s", "tooltip": "%s", "alt": "%s"}\n' "$CLASS" "$TOOLTIP" "$CLASS"
                fi
                if [ $CLASS == "Stopped" ]; then
                    TOOLTIP="Tailscale is not running"
                    printf '{"class": "%s", "tooltip": "%s", "alt": "%s"}\n' "$CLASS" "$TOOLTIP" "$CLASS"
                fi
            '';
        };
    };
}