I have a Bash script that is being run interactively and as a
cron job. When run interactively it outputs colored text on the terminal. However, when run in
cron it doesn't have a terminal and therefore I get plenty of
[1;31m and similar in the output.
Is there a way in Bash to tell it to swallow the escape codes if the output device doesn't support them?
This is related to How to check if bash can print colors which is about checking the condition. However, I want to change as little as possible in the invocation of
printf while retaining the dual functionality of colors or not depending on the output device.