Don't print Ansi escape sequences if NO_COLOR set or TERM=dumb

[mbucc]

Quick Summary: Well-behaved Unix programs won't print Ansi escape sequences if TERM=dumb

SSCCE

% set|egrep 'NO_COLOR|TERM='
NO_COLOR=1
TERM=dumb
% elm
Hi, thank you for trying out �[92mElm�[0m �[92m0.19.1�[0m. I hope you like it!
...

• Elm: 0.19.1
• Browser: N/A
• Operating System: MacOS Ventura 13.1

Additional Details

As the other poster said, export TERM=dumb is the universal way of saying that your terminal is not capable of vt100 (and other, more exotic) sequences supported by xterm and the like.
https://www.reddit.com/r/plan9/comments/iz9rdw/acme_on_linux_remove_ansi_in_win/

Command-line software which adds ANSI color to its output by default should check for a NO_COLOR environment variable that, when present and not an empty string (regardless of its value), prevents the addition of ANSI color.
https://no-color.org

[github-actions]

Thanks for reporting this! To set expectations:

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Finally, please be patient with the core team. They are trying their best with limited resources.

[mbucc]

Workaround: elm 2>&1|perl -pe 's/\x1b\[[0-9;]*[mG]//g'