Preview URL in comment doesn't match Enterprise deployment URL

[thomas-noimos]

I'm working on a private repo so I hope you not having access to it won't be an issue, but what I'm facing right now is that the comment gives me the following content:

Deployed preview to https://noimosai.github.io/noimos-ui-kit/pr-preview/pr-18/

However this link doesn't work and gives me a 404. I checked the gh-pages branch and the content is there. Apparently it is a new GitHub thing or I configured something wrong but my actual deployment is another URL:

https://friendly-adventure-lnjz19e.pages.github.io/ and I can access the preview content using the adapted URL https://friendly-adventure-lnjz19e.pages.github.io/pr-preview/pr-18/

Here is my config:

Did I configure something wrong ?

[thomas-noimos]

Sorry I missed the docs where I could configure the custom-url prop, closing this.

[rossjrw]

Reopening this as a bug just in case. While I've not personally seen a *.pages.github.io before, it looks like that's what URLs for private enterprise repos look like (based on https://docs.github.com/en/enterprise-cloud@latest/pages/getting-started-with-github-pages/changing-the-visibility-of-your-github-pages-site#about-subdomains-for-privately-published-sites).

friendly-adventure-lnjz19e looks randomly-generated - is it permanent? Or does it ever change (over time, with each branch, etc)?

Does custom-url completely resolve the issue?

If all looks good, I'll leave this issue open as a documentation task as it'd be good to mention for enterprise users.

[thomas-noimos]

@rossjrw yes, using custom-url solved the issue. I completely removed the deployment and disabled GH pages, then enabled again and the randomly generated URL was the same after re-enabling it, so I guess it persists.

[rossjrw]

Works for me, thanks for the update!

[CCFenner]

I have issues when using the action on an enterprise instance.

[PR Preview Action](https://<gh-enterprise-host>/rossjrw/pr-preview-action) v1.4.7
:---:
:rocket: Deployed preview to https://<org>.github.io/<repository>/pr-preview/pr-1/
on branch [`gh-pages`](https://<gh-enterprise-host>/<org>/<repository>/tree/gh-pages) at 2024-09-17 07:30 UTC
<!-- Sticky Pull Request Commentpr-preview -->

1. The link to this repository actually points to the repo on the enterprise instance, which does not exist.
2. The link to the deployment points to github.io instead of https://pages.<gh-enterprise-host>/<org>/ (I'm using an org site, see types-of-github-pages-sites)

I try to fix 2 with a custom-url for now.

[rossjrw]

@CCFenner Thanks for the report!

Issue 1 fixed in v1.4.8 by hardcoding this action's base URL to github.com.

Issue 2 is tougher. I didn't see any documentation indicating that the Pages for an enterprise instance is definitely hosted at a pages subdomain, so I'm assuming that's a custom domain on your instance, in which case the custom-url parameter is the correct solution.

[CCFenner]

I didn't see any documentation indicating that the Pages for an enterprise instance is definitely hosted at a pages subdomain

It's mentioned here https://docs.github.com/en/enterprise-server@3.11/pages/getting-started-with-github-pages/about-github-pages#types-of-github-pages-sites
Seems to be related to subdomain isolation.

[rossjrw]

Aha, thank you! Given that starting point it looks like the only reliable way to detect the Pages URL on Enterprise would be via the Octokit API, which does seem feasible. Unfortunately it doesn't look like I'm going to be able to set up automated testing of this action on Enterprise (https://github.com/orgs/community/discussions/47057).