[Texmacs-dev] GNU TeXmacs and S7 Scheme in 2022

[Darcy Shen]

## Mogan: the fork of GNU TeXmacs using S7 Scheme

Based on Max's S7 branch, I tried to make a fork of GNU TeXmacs called Mogan:

+ Mogan V1.0.4 (V1.0.0, V1.0.1, V1.0.2, V1.0.4) based on GNU TeXmacs v2.1.1

+ Mogan V1.1.0 based on GNU TeXmacs 2.1.3 (unreleased)

There are 10 S7 Scheme related commits for Mogan V1.1.0 based on GNU TeXmacs v2.1.2.

I think S7 Scheme for GNU TeXmacs is already good enough.

I created Mogan because I need to make experimental changes on GNU TeXmacs. And I think S7 Scheme is not experimental any more.

## Why not supporting both S7 Scheme and GNU Guile 1.8.x for GNU TeXmacs v2.1.3?

Here is Mogan V1.1.0: https://github.com/XmacsLabs/mogan/releases/tag/v1.1.0

Now, the functionality of Mogan in user space is relatively stable now. There are still some bugs in Mogan because I'm using S7 Scheme. But only advanced users will trigger those bugs.

I think it is time to support S7 Scheme as an alternative, eg. we can release:

GNU TeXmacs v2.1.3 for Windows (S7 Scheme)

GNU TeXmacs v2.1.3 for macOS (S7 Scheme)

GNU TeXmacs v2.1.3 for macOS M1 (S7 Scheme)

GNU TeXmacs v2.1.3 for Windows (GNU Guile 1.8)

GNU TeXmacs v2.1.3 for macOS (GNU Guile 1.8)

GNU TeXmacs v2.1.3 for macOS M1 (GNU Guile 1.8)

With S7 Scheme, it is possible for GNU TeXmacs to become an installable package for Debian and Debian derivatives via `apt get` again.