GNU readline: avoid prompt string in output if input is not interactive

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Published on 2010-03-09T05:15:24Z Indexed on 2010/03/09 5:21 UTC
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I have a readline-based application with a prompt, however I'd like it to not show when the input is not interactive.

$ ./readline-app < command-list > result
$ cat result
prompt> Output line 1
prompt> Output line 2
prompt>
$

How can I make the prompt to not print in this case?

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