The idea is that the cpython Doc/ repository should just care about building the documentation, not linking to other builds and languages from docs.python.org.

Building multiple versions, multiple languages, and linking them together is the role of docsbuild-scripts.

This would also avoid the need to updateswitchers.js andindexsidebar.html on every cpython branch for every new cpython release and every new language.

What would need to change:

• Dropswitchers=1 fromcpython/Doc/Makefile
• Dropif switchers block incpython/tools/templates/layout.html. it already has an alternative. Add anid to the<li> so it can be easily found by the newswitchers.js as the placeholders are dropped.
• Moveswitchers.js to docsbuild-scripts and make it use the<li> new id instead of placeholders if they are not found, and maybe fallback to find the place from other ways so it can work on old branches without commiting to them.
• Write a generic "indexsidebar.html" for local builds, to be commited in cpython, and move the "cross-linked" version of indexsidebar in docsbuild-scripts.
• Move {% trans %} tags in dummy.html so they can still be translated even if versionned in docsbuild-scripts (it's the only remaining part in cpython, hope it won't change too often).

We then need aclean way for docsbuild-scripts to edit the HTML to make it load switchers.js.