fix kernel-wedge to accept all modules as optional

[Amit Kucheria]

Binary package hint: kernel-wedge

kernel-wedge requires that atleast one module is built-in. This is a drawback to make the d-i directory common across all archs/flavours in the kernel package.

The end goal is to have a common d-i directory with minimal changes across flavours.

[Colin Watson (cjwatson)]

I'm surprised that simply adding the ' ?' suffix doesn't deal with this.
Could you give me the error message that results from trying this?

[Tim Gardner (timg-tpi)]

I think the offending code is in commands/check:

#!/bin/sh -e
empty=
for pkg in $(dh_listpackages -s | grep -- '-di$'); do
 if [ -z "$(find debian/$pkg -type f)" ]; then
  echo "$pkg will be empty" >&2
  empty=1
 fi
done
if [ "$empty" ]; then
 exit 1
fi

I think we can get by with just emitting a warning and not returning an error.

[Colin Watson (cjwatson)]

We would need to ensure that the udeb is omitted (rather than generated
but empty) and that any dependencies on it are filtered out. Or
something like that.