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cloudflare/pages-action: any way to know CF_PAGES_URL ahead of running the action?

Hi,
I have a setup that's making use of the

CF_PAGES_URL

CF_PAGES_URL

as described in docs

In my build I'm getting the

id

id

out of it and I put it somewhere in assets. It's important to the setup because what comes out of the build is not served directly from the

*.pages.dev

*.pages.dev

, but instead the root of

*.pages.dev

*.pages.dev

is served as a path of some domain.

id

id

becomes part of path like this:

/some-ns/:id/file.ext

/some-ns/:id/file.ext

I have a bunch of previews
- ad-hoc previews on push to all branches (e.g. feature and fixes).
- several long-living branches, representing a shared testing envs. In my reverse proxy I'm using those known aliases to express where the "things" are

Then - and that's why I really need the

id

id

to be known ahead of time - if my statics (ES modules) load something, I don't want them to load from alias. Things on it might have already been replaced.

I make them load from

/some-ns/:id/thing.es.js

/some-ns/:id/thing.es.js

(as mentioned). This way those are essentially permalink. That's what I'm after.
The address to the entrypoint, which I named

autoloader.js

autoloader.js

doesn't have

:id

:id

in it. It's

/some-ns/autoloader.js

/some-ns/autoloader.js

This setup works well - no problems.

But that's at a cost of actually having several long-living branches in repo origin.

And that bugs me. Or, rather, it confuses other guys in my team. They sometimes ask if we couldn't get rid of them (they're not that much into the "git-ops" concept as I am - I'm not blaming them, I'm stating the fact).

I'm looking for alternative, and I know there's

cloudflare/pages-action

cloudflare/pages-action

. I even use it in some other setups that don't depend on

id

id

.

And it can be given the

branch

branch

. YEAH! I've got it!… but… there's this

id

id

thing.

So, having all that written down: is there maybe a way to get the

id

id

(or the whole url, as in automatic build) somehow in GHA but not as action Output, or if I'm dependent on