Programmatically get path in `__root.tsx`?

I'd like to get the current URL path within my

__root.tsx

__root.tsx

. Is this possible?

My goal is to define my canonical URL in my head's links::

{
  rel: "canonical",
  href: `${import.meta.env.PUBLIC_ORIGIN}${pathname????}`,
},

{
  rel: "canonical",
  href: `${import.meta.env.PUBLIC_ORIGIN}${pathname????}`,
},

Solutions considered:
- Specify this per route to override the head -- I don't want to do this, for this property, b/c not DRY.
-

window.location.pathname

window.location.pathname

-- won't work b/c of SSR
-

ctx

ctx

- the path is not available on the

ctx

ctx

unfortunately.