Macro lazy_motd 

macro_rules! lazy_motd {
    (copyright = [$($copyright_line:expr),* $(,)?] $(, $key:ident = $val:expr)* $(,)?) => { ... };
    ($( $key:ident = $val:expr ),* $(,)?) => { ... };
    (@assign bin = $val:expr, $bin:ident, $build:ident, $mode:ident, $timestamp:ident, $environment:ident, $copyright:ident) => { ... };
    (@assign build = $val:expr, $bin:ident, $build:ident, $mode:ident, $timestamp:ident, $environment:ident, $copyright:ident) => { ... };
    (@assign mode = $val:expr, $bin:ident, $build:ident, $mode:ident, $timestamp:ident, $environment:ident, $copyright:ident) => { ... };
    (@assign timestamp = $val:expr, $bin:ident, $build:ident, $mode:ident, $timestamp:ident, $environment:ident, $copyright:ident) => { ... };
    (@assign environment = $val:expr, $bin:ident, $build:ident, $mode:ident, $timestamp:ident, $environment:ident, $copyright:ident) => { ... };
    (@assign copyright = $val:expr, $bin:ident, $build:ident, $mode:ident, $timestamp:ident, $environment:ident, $copyright:ident) => { ... };
    () => { ... };
}