Create a group from a list of message-ids

[Alexander Baier <lexi.baier@gmail.com>]

Hello,

I use a tool called mu [1] to index and search my mail, which is stored
in a Maildir folder. mu is able to give me the message ids of all the
mails that match a given query. I want to use these ids to create a new
group in gnus that shows the search result. So it basically boils down
to this:

Is there a function or facility in gnus that takes a list of message-ids
(or even a list of local path names) and creates a new group containing
the corresponding messages?

I am fine with writing some elisp to call out to mu and converting its
output to a list, I just need above mentioned functionality.

Thanks in advance,

Alex

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[1]  http://www.djcbsoftware.nl/code/mu/