Re: [patch] gnus.el::gnus-invalid-group-regexp - Support IMAP

[Reiner Steib <4.uce.03.r.s@nurfuerspam.de>]

On Thu, Aug 21 2003, Simon Josefsson wrote:

> Reiner Steib <4.uce.03.r.s@nurfuerspam.de> writes:
>
>> On Tue, Aug 19 2003, Simon Josefsson wrote:
>>
>>> A potential problem may be if you create, e.g., a nnml or nnfolder
>>> group with the name containing '/'.  Does it work?  With Agent/Caching
>>> too?  Does it do what users expect?  With all
>>> nnmail-use-long-file-names settings?  No problems with having two
>>> groups 'foo' and 'foo/bar'?  Many questions.
[...]
>> - The problem that we were discussing was only the character `/' in
>>   IMAP groups.  I don't think it's a good idea to let the user create
>>   _any_ invalid group, e.g. with [: `'\"] and even empty group names.
>
> All of those characters are valid in IMAP, 

Okay, we can change the "(string-match "/" match)" part.  But at least
empty or other group names, that will most probably fail when used in
Gnus groups (which chars?) sooner or later[1] should remain forbidden,
IMHO.  If the user is absolutely sure, he can always customize
`gnus-invalid-group-regexp'.

> and since some IMAP servers export regular file systems ($HOME/), I
> think it is even likely that people have group names containing some
> of those characters.

I know that it exists, but I remembered some problems related to this,
e.g. with "Unerwünschte Nachrichten" (?).

> OTOH if we allow ':' the user is pretty much required to use a
> secondary select method for that group, otherwise it will confuse the
> Gnus group name functions.  

Then we would have to move the checks from `gnus-read-group' to
`gnus-group-make-group' and check for back end and select method
there, I think.

> I.e., is 'nnimap:foo' the group 'nnimap:foo' on the primary method,
> or the group 'foo' on a secondary nnimap method?  OTTH, I don't
> think we should try to forbid this too much, most people have nnimap
> as a secondary select method, and in that case things will work
> fine.  A warning and a question seems safe enough.

Could you please change the wording of the warning appropriately?

Bye, Reiner.

[1] Will Gcc to a group containing `"' work?  And the other issues you
    mentioned previously (see quote at the top).
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