Failing on GitLab CI v9+

[althonos]

Hi !

So GitLab-CI has been updating from v8 to v9 lately, and they transitioned from builds to job in their whole nomenclature. As such, some job variables have been renamed, causing codecov to crash when called in the CI environment. For instance (this example is actually what makes it crash for me) CI_BUILD_REPO has been renamed CI_REPOSITORY_URL, so I get the following exception when I try to report:

      _____          _
     / ____|        | |
    | |     ___   __| | ___  ___ _____   __
    | |    / _ \ / _  |/ _ \/ __/ _ \ \ / /
    | |___| (_) | (_| |  __/ (_| (_) \ V /
     \_____\___/ \____|\___|\___\___/ \_/
                                    v2.0.7

==> Detecting CI provider
Traceback (most recent call last):
  File "/usr/local/bin/codecov", line 11, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.6/site-packages/codecov/__init__.py", line 473, in main
    slug=os.getenv('CI_BUILD_REPO').split('/', 3)[-1].replace('.git', ''),
AttributeError: 'NoneType' object has no attribute 'split'
ERROR: Job failed: exit code 1

I'll submit a PR shortly.

[jayvdb]

It can be worked around by adding the following to .gitlab-ci.yml

variables:
  CI_BUILD_REF_NAME: $CI_COMMIT_REF_NAME
  CI_BUILD_ID: $CI_JOB_ID
  CI_BUILD_REPO: $CI_REPOSITORY_URL
  CI_BUILD_REF: $CI_COMMIT_SHA

[stevepeak]

Thank you! Will patch today 👍

[althonos]

@stevepeak: please see PR (#97), the fix you made will get you the right stub but neither the SHA of the commit nor the right branch...