Re: Python 3

[Karlin High]

On 8/7/2019 2:03 PM, Gwyn Ciesla via bug-lilypond wrote:
> when will Python 3 be supported?

After LilyPond's cross-build system gets taught how to build Python3 for 
Windows. That will allow including it in LilyPond's Windows installer 
binary, instead of needing users to resolve dependencies themselves. 
Here are some past discussions on the topic. I gather the current 
cross-build for Python did not come easily, and needed source code 
patches that the Python project chose not to include upstream.

<https://lists.gnu.org/archive/html/lilypond-devel/2019-01/msg00082.html>
<https://lists.gnu.org/archive/html/lilypond-devel/2019-02/msg00099.html>

Pure speculation: I've seen installers for other software have multiple 
stages. It's a single file still, but after it starts up and does some 
preliminaries it says "Here comes the database backend now" and hands 
off to a whole 'nother installer they included for something SQL, then 
when that's done it returns to the original install.

I wonder how that approach compares to LilyPond's current practice for 
Python? Could GUB's NSIS Windows-installer-builder portions bundle up 
the stock Windows installer for Python? Looks like it would be ~26MB or 
so. But for all I know, this idea may have already been considered and 
rejected.
--
Karlin High
Missouri, USA