Make an API call to a self-hosted/enterprise instance

[UbiquitousBear]

Is your feature request related to a problem? Please describe.
It looks like there's no way to configure the API host: https://github.com/actions/github-script/blob/main/action.yml

Describe the solution you'd like
Ability to configure the API host to make it compatible with GitHub Enterprise Server.

[joshmgross]

👋 Hey @UbiquitousBear, you should be able to be able to set the API URL using the GITHUB_API_URL environment variable -

https://github.com/actions/toolkit/blob/11601c0d2dbb2d2cf287c77d03cc3e53866a4f56/packages/github/src/internal/utils.ts#L23-L25

Example:

      - uses: actions/github-script@v4
        env:
          GITHUB_API_URL: 'https://example.com'
        with:
          script: |
            github.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: '👋 Thanks for reporting!'
            })

[UbiquitousBear]

@joshmgross looks great - thanks!

[rajbos]

Retriggering this as this setup does not work, I think this is caused by the changes that environment variables cannot start with the GITHUB prefix anymore, at least since the introduction of Configuration Variables.

Can a different variable be introduced for this to over write the behaviour?