Custom Installer Mechanism

[Ralf Mardorf]

Hi,

not a clue, but 30 seconds googling for

  ubuntu installer source code

returned the Wiki https://wiki.ubuntu.com/Ubiquity
and the source code/s https://launchpad.net/ubiquity
https://github.com/CanonicalLtd/subiquity .

I don't know if this list is for your kind of request, but maybe you
could ask there, too:
https://lists.ubuntu.com/mailman/listinfo/Ubuntu-installer

Regards,
Ralf