[NTG-context] Installing Modules with ConTeXt LMTX

[Sebastian Miele]

I want to try the t-letter module. I have a fresh install of ConTeXt
LMTX from today. The page https://wiki.contextgarden.net/Modules has
sections "Installation by hand" and "ConTeXt standalone", but no section
on ConTeXt LMTX.

The section on ConTeXt standalone mentions a --modules switch to
first-setup.sh in order to include modules. This cannot work with the
install.sh from ConTeXt LMTX, as it does not pass any command line
arguments to mtxrun. install.sh does have an empty by default variable
LMTXEXTRAS at the top, which is passed as --extras="$LMTXEXTRA" to
bin/mtx-install.lua near the bottom of the script. However, setting
LMTXEXTRAS=t-letter seems to not work.

Searching through the bin/mtx-install.lua for "modules" and "extras"
reveals that most probably neither flag is handled at all. However, the
helpinfo variable in bin/mtx-install.lua does mention the modules flag,
but not the extras flag.

Is there a way to install modules in ConTeXt LMTX not by hand?