messages appear on stderr in batch mode

messages appear on stderr in batch mode

[Glenn Morris]

I never noticed before, but:

emacs -Q --batch --eval '(message "hello")'

prints "hello" on stderr, not stdout. This is a little annoying when
trying to write automated build scripts etc for Emacs, since stderr is
full of noise, and any real errors can be hard to spot.

I guess there is a reason for this, since it is in the manual (and the
man page, no less); but why?

Re: messages appear on stderr in batch mode

[Davis Herring]

> emacs -Q --batch --eval '(message "hello")'
>
> prints "hello" on stderr, not stdout. This is a little annoying when
> trying to write automated build scripts etc for Emacs, since stderr is
> full of noise, and any real errors can be hard to spot.
>
> I guess there is a reason for this, since it is in the manual (and the
> man page, no less); but why?

I presume it's because `message' is used to generate prompts and warnings
which both should go there.  Perhaps one is meant to use `print' etc. for
output?

Davis

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