Who knows about https://github.com/D-Programming-Language/tools/blob/master/update.sh?

[Daniel Murphy via Digitalmars-d]

"H. S. Teoh via Digitalmars-d"  wrote in message 
news:mailman.5522.1422473874.9932.digitalmars-d at puremagic.com...

> That will no longer be an option once D becomes self-hosting (DDMD)...
>
> OTOH, just ship the binary! :-P

Exactly.  A host D compiler is an inevitable requirement.