Retrieve `CI_SERVER_URL` as `GITLAB_URL`?

[huxuan]

According to the Predefined CI/CD variables reference, CI_SERVER_URL will just be what we want to GITLAB_URL, so when we are running on GitLab CI/CD, maybe it is better to retrieve the value by default?

[fgreinacher]

Thanks for reaching out! We do already have some logic to determine the default GitLab URL:

gitlab/lib/resolve-config.js

Lines 31 to 35 in 1aeabde

	const defaultedGitlabUrl =
	userGitlabUrl ||
	(service === "gitlab" && CI_PROJECT_URL && CI_PROJECT_PATH
	? CI_PROJECT_URL.replace(new RegExp(`/${CI_PROJECT_PATH}$`), "")
	: "https://gitlab.com");

I agree that using CI_SERVER_URL would probably simplify this a bit as we would not need the project URL/path logic anymore.

Feel free to send a pull request :)