Predefine CLICOLOR_FORCE=1 for GitLab Runners
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Problem to solve
Most programs run in GitLab CI don't output ANSI color codes, because they don't detect a tty (or something even more sophisticated like terminfo). But GitLab CI would support them, so one has to manually add flags to his calls, e.g. --color=always.
Intended users
CI users that use tools which output colors.
Further details
Especially compiler errors are a lot more readable with colors.
Proposal
Add CLICOLOR_FORCE to the predefined environment variables and set it to 1.
Permissions and Security
Not sure what to put here.
Documentation
Would need to be documented here: https://docs.gitlab.com/ee/ci/variables/predefined_variables.html
Testing
Parsing ANSI colors is already supported and tested. What should change is that tools like CMake using make will now output colors without any manual adjustment.
What does success look like, and how can we measure that?
Also not sure what to put here, sorry.