Re: [PATCH 1/4] remote-mediawiki: add namespace support

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So I shared the patch some time ago (~2 years). Surprisingly its just
now getting attention. I guess some renewed interest in using mediawiki
with git. Myself, however, am no longer using mediawiki. Nor am I
completely clear on what the reasons were for using some variable or
another a couple of years ago. So... the best of luck, sorry I couldn't
be more helpful.

Eric Sunshine:
> On Sun, Oct 29, 2017 at 2:29 PM, Antoine Beaupré <anarcat@xxxxxxxxxx> wrote:
>> On 2017-10-29 13:24:03, Eric Sunshine wrote:
>>> On Sun, Oct 29, 2017 at 12:08 PM, Antoine Beaupré <anarcat@xxxxxxxxxx> wrote:
>>> So, the idea is that if the input has form "something:number", then
>>> you want to look up "something" as a namespace name. Anything else
>>> (such as "something:foobar") is not considered a valid page reference.
>>> Right?
>>
>> frankly, i have no idea what's going on here.
>>
>>> The multiple 'return's are a bit messy. Perhaps collapse the entire
>>> function to something like this:
>>>
>>>     sub get_mw_namespace_id_for_page {
>>>         my $arg = shift;
>>>         if ($arg =~ /^([^:]+):\d+$/) {
>>>             return get_mw_namespace_id($1);
>>>         }
>>>         return undef;
>>>     }
>>>
>>> In fact, it may be that the intent of the original code *was* meant to
>>> do exactly the same as shown in my example above, but that the person
>>> who wrote it accidentally typed:
>>>
>>>     return get_mw_namespace_id($namespace);
>>>
>>> instead of the intended:
>>>
>>>     return get_mw_namespace_id($1);
>>>
>>> So, a minimal fix would be simply to change $namespace to $1.
>>> Tightening the regex as I did in my example would be a bonus (though
>>> probably ought to be a separate patch).
>>
>> so while i'm happy to just copy-paste your code in there, that's kind of
>> a sensitive area of the code, as it was originally used only in the
>> upload procedure, which I haven't tested at all. so i'm hesitant in just
>> merging that in as is.
> 
> I don't think there's a need to copy/paste my example code. If you
> instead make the minimal suggested fix, then the resulting code will
> be effectively equivalent to my example (minus the tighter regex).
> 
>> i don't understand why or how this even works, to be honest: page names
>> don't necessarily look like numbers, in fact, they generally don't. i
>> don't understand why the patch submitted here even touches that function
>> at all, considering that the function is only used on uploads. I just
>> cargo-culted it from the original issue...
> 
> I, myself, am not familiar with or a user of Mediawiki or with the Git
> bridging, and I don't know what page names look like, but I'm pretty
> well convinced from reading both the existing code and this patch that
> the changes to get_mw_namespace_id_for_page() are really just a bug
> fix to that function. My interpretation is that the function really
> was intended to strip the ":id" portion of "name:id" before calling
> get_mw_namespace_id(); the fact that the original code neglects to do
> so seems just an oversight. The fact that the regex uses capturing
> parentheses implies strongly that it was indeed the intention to use
> $1 in the call to get_mw_namespace_id(). Unlike the "fix" in the patch
> you posted from Kevin, which is perhaps unnecessarily complicated, the
> fix I suggested above is about a minimal as possible. That is,
> changing:
> 
>      return get_mw_namespace_id($namespace);
> 
> to:
> 
>      return get_mw_namespace_id($1);
> 
> should achieve the same result. (It could be made more robust by
> tightening the regex as in my example, but that's a separate topic,
> not needed just to get the function to work as intended.)
> 




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