Add .NET 6.0 env variable for color output

[NickCraver]

See dotnet/runtime#47935 for details, basically enables color output even though console output is redirected for a better time in GitHub actions.

[Tyrrrz]

Relevant: created an issue on setup-dotnet to have it enabled by default
actions/setup-dotnet#288

[NickCraver]

@Tyrrrz so....I can't get it to work at all, maybe I'm holding it wrong? It'd only work on Unix either way but...yeah, it doesn't seem to do anything here. There's something else in play I guess but don't want to spend a day figuring it out. This is way, way harder than it should be though.

[Tyrrrz]

@Tyrrrz so....I can't get it to work at all, maybe I'm holding it wrong? It'd only work on Unix either way but...yeah, it doesn't seem to do anything here. There's something else in play I guess but don't want to spend a day figuring it out. This is way, way harder than it should be though.

Hmm, I tested it locally with dotnet test > 1.txt while flipping the env var to different states and all produced files were without colors.

@0xced sorry for tagging you, do you know what could be wrong?

Update: apparently it's not supposed to work on Windows, where I was testing it. I tested it on Linux too and it works there when redirected to a file -- so the issue is probably on the GitHub Actions side somehow?

[Tyrrrz]

FYI: I created a simple repro, in case you can forward it to relevant people
https://github.com/Tyrrrz/TestDotnetColors/actions/runs/2198482246

And started a discussion: dotnet/runtime#68302

[xt0rted]

This issue came up in dotnet/command-line-api#1710. I thought it was something that was needed in System.CommandLine (hence asking about the new feature for it) but was told this env var should be all that's needed. I can't get it to work though. In my own dotnet local tool I can output ansi color codes and get color in the build log but I can't get the dotnet cli itself to output color.

[Tyrrrz]

This issue came up in dotnet/command-line-api#1710. I thought it was something that was needed in System.CommandLine (hence asking about the new feature for it) but was told this env var should be all that's needed. I can't get it to work though. In my own dotnet local tool I can output ansi color codes and get color in the build log but I can't get the dotnet cli itself to output color.

I'm definitely able to get dotnet CLI to output color codes but not on GitHub Actions.

[Tyrrrz]

@am11 provided a fix here: dotnet/runtime#68302 (comment)

[Tyrrrz]

This should work @NickCraver

[NickCraver]

Thanks both! I opened an issue to see if we can get this working in Windows as well: dotnet/runtime#68340