"git diff --no-pager --exit-code" errors out but returns zero exit code

From: Romain Chossart <romainchossart@gmail.com>
Date: Aug 20, 2023, 19:52 UTC
Message-ID: <CAHxTZ4AUxow1p7mNG0fuRtfhkaOu=Wpc7cYvM8wRaB80hPNf9Q@mail.gmail.com>

I recently found out (the hard way :-) ) that running the following command prints an appropriate error on stderr but returns a zero exit code:

> $ git diff --no-pager --exit-code
> error: invalid option: --no-pager
> $ echo $?
> 0

I would expect a non-zero exit code to be returned.

Interestingly, running `git diff --no-pager --exit-code HEAD` shows a usage instead and does return a non-zero exit code as expected.

Thanks,

-- 
Romain Chossart

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