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[leafnode-list] Re: leafnode 2 not creating "all_links" in gmane hierarchy.
On 2011-05-11, Matthias Andree wrote:
> Am 10.05.2011 14:45, schrieb Adam Funk:
>> On 2011-05-09, clemens fischer wrote:
>>> On Mon-2011/05/09-19:01 Christian Ebert wrote:
>>>> only_groups_pcre = PCRE
>>>> This parameter lists the Perl-compatible regular
>>>> expression of groups that are fetched or posted to this
>>>> server. The PCRE is automatically anchored at the left hand
>>>> side, so you can omit the leading ^. Remember to
>>>> escape dots, as in: de\.comp\.|de\.comm\. Another example
>>>> might be only_groups_pcre=de\.(?!alt) that fetches all de.*
>>>> groups that are not de.alt.* groups. Consult the PCRE
>>>> documentation for details.
>>> Oopsie. I forgot about this.
>> Well, I put the caret in yesterday anyway. It looks nice & my other
>> only_groups_pcre rules have it.
> It doesn't hurt if you do that. But you need to pay some attention when
> using alternatives with the pipe ("|") character, since
> would normally match alt2 anywhere in the word, not just at the beginning.
> ^(alt1|alt2) is what many people new to REs mean -- and to avoid such
> surprises, I'm anchoring the regexp. De-anchoring can be specified by
> .*?, a non-greedy version of .*.
I'm not new to regexps, but I occasionally run into trouble because
(adapting a famous quote) the great thing about regexp languages is
that there are so many different ones on your computer as the same
time (grep, PCRE, s-lang, etc.).
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