Hello and thank you for this. Is there a phab ticket to follow the
deployment process?
Igal (User:IKhitron)


2017-08-10 21:42 GMT+03:00 Subramanya Sastry <ssas...@wikimedia.org>:

>
>
> On 07/06/2017 08:02 AM, Subramanya Sastry wrote:
>
>>
>> TL;DR
>> -----
>> The Parsing team wants to replace Tidy with a RemexHTML-based solution on
>> the
>> Wikimedia cluster by June 2018. This will require editors to fix pages and
>> templates to address wikitext patterns that behave differently with
>> RemexHTML.  Please see 'What editors will need to do' section on the Tidy
>> replacement FAQ [1].
>>
>> ......
>
>>
>> 9. Monitoring progress
>> ----------------------
>> In order to monitor progress, we plan to do a weekly (or some such
>> periodic
>> frequency) test run that compares the rendering of pages with Tidy and
>> with
>> RemexHTML on a large sample of pages (in the 50K range) from a large
>> subset
>> of Wikimedia wikis (~50 or so).  This will give us a pulse of how fixups
>> are
>> going, and when we might be able to flip the switch on different wikis.
>>
>
> I wanted to post some followups on this.
>
> 1. We have a revived dashboard that tracks linter error counts on wikis
>    for all linter categories.
>
>    See https://tools.wmflabs.org/wikitext-deprecation/
>
> 2. We track the error counts as they change and publish weekly snapshots
>    comparing counts to a July 24th baseline (which is when I first
>    started collecting stats)
>
>    See https://www.mediawiki.org/wiki/Parsing/Replacing_Tidy/Linter/Stats
>
> 3. We also have a pixel-diffs test run (previously called visual diffs)
>    that compares page rendering with Tidy and with RemexHTML. The test
>    set has 73K pages sampled from 60 wikis. These diffs more accurately
>    reflect what kind of rendering differences we can expect to see if
>    pages are not fixed.
>
>    See http://mw-expt-tests.wmflabs.org/
>
> 4. Based on the runs above, I identified one more high priority linter
>    category which is a Tidy whitespace bug and needs to be fixed (expect
>    mostly templates, especially navboxes based on what I've seen in the
>    test run above). Once the code is reviewed and deployed to the
>    cluster, we'll start populating this category.
>
>    See https://gerrit.wikimedia.org/r/#/c/371068/ and
> https://gerrit.wikimedia.org/r/#/c/371071/
>
> Thanks,
> Subbu.
>
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