Fix (in part) #4204: Honour NO_COLOR
variable
#4260
Merged
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Adopt the standard proposed at http://no-color.org/, that colour should not be added by default if the
NO_COLOR
environment variable is present, by adaptingdefaultColorWhen
in moduleStack.DefaultColorWhen
(which varies depending on whether the operating system is Windows or Unix-like).Please also shortly describe how you tested your change. Bonus points for added tests!
Tested on Windows 10 by building -
stack test
- and using the built tool, as below: