Re: [PATCH 4/7] remote-mediawiki: skip virtual namespaces

> On Sun, Oct 29, 2017 at 10:51 PM, Antoine Beaupré <anarcat@debian.org> wrote:
>> Virtual namespaces do not correspond to pages in the database and are
>> automatically generated by MediaWiki. It makes little sense,
>> therefore, to fetch pages from those namespaces and the MW API doesn't
>> support listing those pages.
>>
>> According to the documentation, those virtual namespaces are currently
>> "Special" (-1) and "Media" (-2) but we treat all negative namespaces
>> as "virtual" as a future-proofing mechanism.
>
> This patch makes more sense now with the additional commentary.
> Thanks. More below.
>
>> Signed-off-by: Antoine Beaupré <anarcat@debian.org>
>> ---
>> diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
>> index e7616e1a2..5c85e64b6 100755
>> --- a/contrib/mw-to-git/git-remote-mediawiki.perl
>> +++ b/contrib/mw-to-git/git-remote-mediawiki.perl
>> @@ -264,10 +264,12 @@ sub get_mw_tracked_categories {
>>  sub get_mw_tracked_namespaces {
>>      my $pages = shift;
>>      foreach my $local_namespace (@tracked_namespaces) {
>> +        my $namespace_id = get_mw_namespace_id($local_namespace);
>> +        next if $namespace_id < 0; # virtual namespaces don't support allpages
>
> Since (it appears) that get_mw_namespace_id() can return undef, you
> probably still need to take that into account before performing a
> numeric comparison:
>
>     next if !$namespace_id || $namespace_id < 0;