hashar added a comment.
In a lot of case the tools check whether the standard input is a TTY (`sys.stdint.isatty()`) and disable color output when it is not. On CI the containers are spawned without a pseudo tty allocate (`docker run -t`) cause some other tooling might then prompt the user for some input (example: `Really proceed [Y\n]`), which Jenkins can't reply to (it is not an AI yet). And indeed looking at the tip of flake8 code: class BaseFormatter: ... self.color = options.color == "always" or ( options.color == "auto" and sys.stdout.isatty() and _windows_color.terminal_supports_color ) To get coloring one should thus use `flake8 --color=always`. Then looking at `pywikibot/core` it has: name=tox.ini [flake8] color = always Which I am guessing is not taken in account? If I run flake8 with some increased verbosity: $ tox -e flake8-py39 -- -vvvv pywikibot/echo.py |grep -i colo flake8.options.manager MainProcess 124 DEBUG Registered option "Option(--color, default='auto', choices=('auto', 'always', 'never'), help='Whether to use color in output. Defaults to `%(default)s`.')". flake8.options.config MainProcess 127 DEBUG Option "color" is not registered. Ignoring. ^^^^^^^^^^^^^^ It shows a few others: flake8.options.config MainProcess 129 DEBUG Option "enable-extensions" is not registered. Ignoring. flake8.options.config MainProcess 129 DEBUG Option "color" is not registered. Ignoring. flake8.options.config MainProcess 129 DEBUG Option "ignore_regex" is not registered. Ignoring. They all three come from the repository `tox.ini`: name=tox.ini [flake8] enable-extensions = H203,H204,H205,N818 color = always ignore_regex=:keyword And if I had a `hashar_option = hack` the same shows up for it `Option "hashar_option" is not registered. Ignoring.`. So it looks like flake8 has a bug which is that it does not recognizes some options from tox.ini, possibly cause they got renamed (color > colour?) or they somehow forgot to handle them. //For the `releng/tox` images, the entry point invokes tox with `PY_COLORS=1` which I thing was for pip and nose test maybe but that is not recognized by flake8// TASK DETAIL https://phabricator.wikimedia.org/T117570 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: hashar Cc: hashar, Dvorapa, zhuyifei1999, fgiunchedi, Xqt, jayvdb, gerritbot, Ricordisamoa, XZise, Aklapper, StudiesWorld, valhallasw, pywikibot-bugs-list, PotsdamLamb, Jyoo1011, JohnsonLee01, SHEKH, Peteosx1x, Dijkstra, Khutuck, Mgagat, Totolinototo3, Zkhalido, Zanziii, Sadisticturd, Viztor, Wenyi, Tbscho, MayS, Framawiki, Mdupont, JJMC89, Altostratus, binbot, Avicennasis, mys_721tx, Masti, Alchimista
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