Re: preseeding in auto mode URL syntax without hardcoding directory of release name

[john doe <johndoe65534@mail.com>]

On 8/15/25 09:51, Philip Hands wrote:
> john doe <johndoe65534@mail.com> writes:
>
> > At [1, B.2.3] says that if an URL has no slash in it
> > "d-i/trixie/./preseed.cfg" the default path will be used.
> >
> > Is there a way to have that same path for an other file than preseed.cfg
> > (E.G: "url=example.com/alternative.cfg" would translate to
> > "d-i/bookworm|trixie/./alternative.cfg")?
>
> What you probably ought to be doing instead is specifying the option you
> want via the `classes` setting (an alias for `auto-install/classes`),
> and then implementing the behaviour you want by setting `preseed/run` in
> a minimal preseed.cfg, and having a script do whatever you want in
> response to the classes= setting you specified.
>
> So your preseed.cfg would just be:
> =-=-=-=
> d-i	preseed/run	string start.sh
> =-=-=-=
>
> and your start.sh would be something like:
> =-=-=-=
> #!/bin/sh
> . /usr/share/debconf/confmodule
>
> db_get auto-install/classes
> db_set preseed/include "${RET:-default}".cfg;;
> =-=-=-=
> (you might want to check that the value of $RET makes sense before using
> it)
>
> Then the real configs go in `default.cfg` and `alternative.cfg`
> (assuming you're planning on specifying `classes=alternative`)

Appreciate the detailed explanation and the example. With the provided 
example everything works as desired provided that "classes=default" is 
set as kernel boot parameter.

Before I can contribute to your repo, I first need to better understand 
how everything works.
E.G: what is the best way to test the start.sh SCR..

Thanks for everything.

--
John Doe