Visual editor silently converts Wikipedia URL to Wikibooks interwiki link

[1ec5]

When you use the wiki’s visual editor to insert an external link to the English Wikipedia by a full URL, the wiki converts the URL to an interwiki link to the English Wikibooks instead. For example, I never specified Wikibooks when making this edit.

To reproduce this issue:

1. Go to any wiki page and click Edit to open the visual editor.
2. Select some text and click the 🔗 nutton in the toolbar.
3. In the dialog that appears, switch to the External Site tab, then paste https://en.wikipedia.org/wiki/Potlatch_(software).
4. Click Done. Observe that the link points to the Wikipedia URL as entered.
5. Click Save. Observe that the link now points to Wikibooks.
6. View a diff of your change. The raw wikitext says [[wikibooks:Potlatch_(software)|…]].
7. Click Edit to return to the visual editor, then select the link. Observe that it’s now an external link to https://en.wikibooks.org/wiki/Potlatch_(software).

I see nothing amiss in the interwiki table. This seems to be some sort of misconfiguration or bug in Parsoid or Linter.

First reported on the forum. As that post suspects, we are seeing a smattering of incorrect links to Wikibooks as a result of this bug.

[tomhughes]

Linter isn't enabled on the production wiki and I don't believe there's any custom Parsoid configuration either, it's all just using the defaults.

[1ec5]

This doesn’t reproduce with other Wikipedia language editions. For example, https://fr.wikipedia.org/wiki/Potlatch_(logiciel) remains an external link. So maybe it is something to do with the interwiki table after all?

This also doesn’t happen in the wikitext editor’s link dialog, which uses some of the same components as the one in VisualEditor. Parsoid has a special case that looks for opportunities to replace external links with internal links. Every wiki can define its own interwiki prefixes, so Parsoid would have to look up the right prefix to use. I wonder if we’re running into T69373 because one of our namespaces, Wiki:, happens to match the subdomain but not one of the registered interwiki prefixes. wikibooks would be the next interwiki prefix alphabetically.

[tomhughes]

The wikibooks prefix in the interwiki table has https://en.wikibooks.org/wiki/$1 as it's URL which looks ok?

[tomhughes]

Maybe add wiki as an alternate interwiki prefix for wikipedia? We already allow w and wikipedia.

[Andrew-Hain]

Maybe add wiki as an alternate interwiki prefix for wikipedia? We already allow w and wikipedia.

We have a local Wiki: namespace.