Option to turn off color output

[awshew]

Please provide an option to turn off ANSI color output - our pipeline tool (ConcourseCI) doesn't interpret the 256 ANSI code outputted by mark properly, and results in blinking text which is nearly impossible to read. A bug was raised with them and auto-closed - concourse/concourse#2390

[kovetskiy]

Hi, I'm not actually sure why you would need an option to disable it, because mark automatically detects that the stdin is not a tty. So if you run mark in a script, it should not show a colored output, you can easily confirm it by something like that:

 $  mark -u e -p p -b b -f test.md --dry-run 
 $  mark -u e -p p -b b -f test.md --dry-run 2>&1 | cat

Does concourse somehow emulate tty mode?

[awshew]

Concourse doesn't process the ANSI codes mark uses properly, rendering all output text as a blinking blob. While the fix for that lies with them, this wasn't an issue with mark prior to 4.0 so we'd like to skip colour altogether if possible.

[kovetskiy]

The option is available in version 5.4, just pass --color never and mark will not colorize the output.