feat(cli): support custom github API hosts

[patrickhulce]

closes #92

@thedaviddias or anyone else with a github enterprise server would you be able to give this a try? I don't actually have access to a GH enterprise server to test for realz :)

[thedaviddias]

@patrickhulce will try this tomorrow! Thank you!

[patrickhulce]

@thedaviddias any chance you've had time to try this out? :)

[thedaviddias]

@thedaviddias any chance you've had time to try this out? :)

I'm really sorry, I didn't have yet time to try it. This week has been pretty busy... Will keep you posted when I would have tested out.

[javmeister]

Just tested this PR against our github enterprise server.

First run with with my personal token got this output:

GitHub token found, attempting to set status...
No GitHub remote found, skipping.

Looked for the log message and noticed I had to set the env var LHCI_BUILD_CONTEXT__GITHUB_REPO_SLUG manually to our repo url.

The getGitHubRepoSlug() in the runGithubStatusCheck() had returned undefined, I think because our server doesn't have github.com in the url? Haven't debugged that method to confirm this though, but as I said setting the env var override made it work.

Hope this helps, looking forward to have this in my PRs status checks.

[patrickhulce]

Awesome thank you for the info @jalerg! We'll fix that up great catch 👍

[patrickhulce]

aight @jalerg I think we fixed this so you don't need to manually specify the slug, would you be willing to give it one more try? if it doesn't work a sample of your git remote -v output would be amazing :D

[javmeister]

I didn't have time today to test again, will do as soon as I can tomorrow and get back to you.

[patrickhulce]

Thanks @jalerg! No rush, we really appreciate your help!

[javmeister]

The getGitHubRepoSlug() still returned undefined because the githubApiHost parameter wasn't passed in, I still got the No GitHub remote found, skipping. message in the console.

Making this change made it work:

Suggested change

	const hash = getCurrentHash();
	const slug = getGitHubRepoSlug();
	const {githubToken, githubAppToken} = options;
	const {githubToken, githubAppToken, githubApiHost} = options;
	const {githubToken, githubAppToken, githubApiHost} = options;
	const hash = getCurrentHash();
	const slug = getGitHubRepoSlug(githubApiHost);

I noticed the urlLabel in the status check message is undefined, probably unrelated to this, but posting here:

[patrickhulce]

doh! thanks @jalerg! at some point we just need to get a mock github API into our test suite.

[javmeister]

everything worked as expected when making this change, I've run it a few times now, and changed the token to our service account instead of mine and it updated the owner smoothly.

LGTM!