On Sat, 2012-06-23 at 18:19 +0100, Ian Campbell wrote:
>
> > > It is possible that other DP users will want /dev/sda* (the internal
> > > sdcard) instead of /dev/sdb* (the external sdcard). Can I express sda vs
> > > sdb in the flash-kernel db somehow?
> >
> > Ah, yes; that's indeed a problem. That means we need some config file
> > to override the boot device (ideally an installer would create this file
> > for you). This is currently missing in flash-kernel, but here I think
> > it should allow overriding parts of the machine db entry.
>
> That sounds very sensible, I didn't look at that here though. Seems like
> it shouldn't be too hard to add to get_machine_field().
Depending on the desired semantic this could be more or less trivial.
If we want /etc/flash-kernel/local.db (say) to require stanzas indexed
by machine just like all.db then it seems like it should be sufficient
to make MACHINE_DB into a function:
if [ -f /etc/flash-kernel/local.db ] ; then
cat /etc/flash-kernel/local.db
echo # ensure a blank line between local.db and all.db
fi
cat "${FK_CHECKOUT:-$FK_DIR}/db/"*.db
This might seem a bit odd since you would require the Machine: line even
though it ought to be obvious it applies to this machine, e.g. you'd
need
Machine: Globalscale Technologies Dreamplug
DTB-Append: no
to override DTB-Append. The flip side is you could override different
settings for different machines (which seems fairly useless to me.
It'd be a bit more code, but still pretty trivial to
parse /e/f-k/local.db in all of the places which currently just parse
$MACHINE_DB it, so you could just provide "DTB-Append: no" in the config
file.
If you let me know your preference I'll hack something together.
Ian.
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