--print-label swallows colors

[rodneyrehm]

output without --print-label:

output with --print-label:

[mysticatea]

Thank you for this issue.

Yeah, this is a known limitation.
chalk will stop coloring when stdout is not TTY. npm-run-all cannot keep stdout of child processes as TTY if it adds labels to each line (stdout of child processes becomes pipe).

I will add this to documents.

Also, you can give --color option to tools (e.g. eslint) which are using chalk to revive coloring.

[mysticatea]

I added: https://github.com/mysticatea/npm-run-all/blob/master/docs/npm-run-all.md#known-limitations