Disable color when stdout is piped or redirected

[truthdoug]

Many command line utilities (including ls, git, and jq) disable colors and other formatting when the output does not go to a tty. I'd like to see the heroku cli do this.

I like to run things like heroku logs > /tmp/myapp.log and open that in my editor. The color codes are noisy.

On the other hand, I rarely send the output of heroku ps to a pipe or a file. The colors help. Setting NO_COLOR=true for my shell disables that.

Detecting is done with process.stdout.isTTY (already in multiple locations in this repo)

[michaelmalave]

Thanks for reporting this @truthdoug. We'll investigate and get back to you on this as soon as possible.

[michaelmalave]

@truthdoug As you may have seen, we did change the color implementation in the new release and are investigating this. NO_COLOR=true before the command should be a temporary workaround for this in the meantime.

[truthdoug]

@michaelmalave Thanks – I did see the workaround and have used it once or twice. I appreciate your consideration of my feature request!

[k80bowman]

@truthdoug a fix for this was published in v11.2.0 of the CLI. I'm going to go ahead and close this issue, but if this continues to be a problem for you please either re-open this issue or create a new one. Thank you!

[truthdoug]

Yes, this is great. Thanks!