[PR] [272] Enforce the version of coverage manually (pip fails to resolve)

[kopf-archiver]

A pull request by nolar at 2019-12-16 13:56:18+00:00
Original URL: zalando-incubator/kopf#274
Merged by nolar at 2019-12-16 14:07:31+00:00

Resolve coveralls vs. pytest-cov battle for coverage versions due to coverage==5.0 release 2 days ago.

Issue : closes #272
Affected: #258

Description

coverage==5.0 has been release on 14.12.2019 (2 days ago). This broke the CI/CD, as pip cannot resolve the version conflict:

• pytest-cov wants coverage>=4.4, and is executed first.
• coverage==5.0 is found and installed.
• coveralls wants coverage<5.0, but it is too late to reinstall.

The fix is to install coverage<5.0 before any of the dependencies request it. The solution is temporary by its nature. See #273 for a more generic approach (version pinning and auto-upgrading) — will be done somewhen later.

Types of Changes

• Bug fix (non-breaking change which fixes an issue)