`grml-chroot`: remove useless message

[akorn]

    echo "Writing /etc/debian_chroot ..."

I think this line in grml-chroot is unnecessary and annoying; it can clutter up the display when grml-chroot is called several times by a script.

Maybe have a $GRML_CHROOT_VERBOSE setting or something for people who really want/need to see this message? If you think it should definitely be shown by default, please provide a way to turn it off.

[mika]

I'm still unsure how to handle this one, I think it's good to be aware that /etc/debian_chroot is automatically created by grml-chroot (and later on removed), though I agree that this might be annoying if it gets invoked multiple times in a script (as reported by @akorn).

I personally am not a big fan of adding environment variables, especially as this just might not be taken care of/noticed/used at all, so I'd prefer it to have sane defaults and the default should make sense for the majority of users. So should it be quiet by default or verbose by default? :)

Opinions, ideas? @jkirk @zeha @formorer

[jkirk]

I'm still unsure how to handle this one, I think it's good to be aware that /etc/debian_chroot is automatically created by grml-chroot (and later on removed), though I agree that this might be annoying if it gets invoked multiple times in a script (as reported by @akorn).

I am unsure about this one. Setting /etc/debian_chroot is useful and important but I am not sure about the echo line. My feeling is that this is more of a verbose output and could be dropped. I will have a close look the next time I use the grml-chroot (interactively and via scripts).

[akorn]

How about you show it only once for every chroot? I don't know, maybe touch /run/grml-chroot.message.shown.${chroot_path//\/_} to remember it, or something similar?