Make GITHUB_SERVER_URL configurable

[killermoehre]

Hi,

I work on a GitHub Enterprise instance (https://github.internal.company) and want to check out something from https://github.com. My naive approach is

      - name: Checkout github.com/sapcc/fedIPA
        env:
          GITHUB_SERVER_URL: 'https://github.com'
        uses: actions/checkout@v2
        with:
          repository: sapcc/fedIPA
          submodules: true

but even though I overwrite the environment variable GITHUB_SERVER_URL (as used in https://github.com/actions/checkout/blob/main/src/url-helper.ts#L24) the action is still checking from the internal URL, trying to access https://github.internal.company/sapcc/fedIPA.
Mirroring the whole repository is not my goal as I just want to use the code to run some custom workflow.

Any advice?

[cory-miller]

The code linked will prefer whatever is set with the action input:

https://github.com/actions/checkout/blob/a5ac7e51b41094c92402da3b24376905380afc29/action.yml#L98C3-L100

      - name: Checkout somewhere-else.com/sapcc/fedIPA
        uses: actions/checkout@v4
        with:
          repository: sapcc/fedIPA
          submodules: true
          github-server-url: https://somewhere-else.com