Help! How does %post in spin kickstart files work?

[Matthew Miller]

We have a blocker bug for KDE
https://bugzilla.redhat.com/show_bug.cgi?id=1436873
the crux of which is that we need different behavior on the live from
the installed environment.

Rex and I both have the vague memory that stuff done outside of
/home/liveuser gets copied to the actual install. But, I see that in
the fedora-workstation.ks, all sorts of stuff is being messed with in
/usr. How does this actually work? Can we have in the kickstart %post:

dnf -C remove plasma-pk-updates

and have that still end up on the final system?

[Peter Robinson]

On Fri, Jun 30, 2017 at 2:57 AM, Matthew Miller
 wrote:
> We have a blocker bug for KDE
> https://bugzilla.redhat.com/show_bug.cgi?id=1436873
> the crux of which is that we need different behavior on the live from
> the installed environment.
>
> Rex and I both have the vague memory that stuff done outside of
> /home/liveuser gets copied to the actual install. But, I see that in
> the fedora-workstation.ks, all sorts of stuff is being messed with in
> /usr. How does this actually work? Can we have in the kickstart %post:
>
> dnf -C remove plasma-pk-updates

Yes, you can have that (see the removal of dracut-config-generic
> and have that still end up on the final system?

No, because the install is basically a dd of the partitions, but if
it's mandatory in fedora-comps in theory dnf should install it on the
first update

[Matthew Miller]

On Fri, Jun 30, 2017 at 01:14:36PM +0100, Peter Robinson wrote:
> > https://bugzilla.redhat.com/show_bug.cgi?id=1436873
> > dnf -C remove plasma-pk-updates
>
> Yes, you can have that (see the removal of dracut-config-generic
> > and have that still end up on the final system?
>
> No, because the install is basically a dd of the partitions, but if
> it's mandatory in fedora-comps in theory dnf should install it on the
> first update

Ah -- unfortunately, that won't work here, because the thing we want
different is _the thing that tells you to apply updates_.

But fedora-live-workstation.ks¹ has this:

# disable updates plugin

cat >> /usr/share/glib-2.0/schemas/org.gnome.software.gschema.override
   << FOE

[org.gnome.software]

download-updates=false

FOE

How does that work without being copied to the final system?

1. https://pagure.io/fedora-kickstarts/blob/master/f/fedora-live-workstation.ks

[Dan Book]

On Fri, Jun 30, 2017 at 9:36 AM, Matthew Miller 
wrote:
> But fedora-live-workstation.ks¹ has this:
>
> # disable updates plugin
>
> cat >> /usr/share/glib-2.0/schemas/org.gnome.software.gschema.override
>    << FOE
>
> [org.gnome.software]
>
> download-updates=false
>
> FOE
>
> How does that work without being copied to the final system?

The creation of that file is within the /etc/rc.d/init.d/livesys file, I
believe that is why it only applies to the live environment.

[Matthew Miller]

On Fri, Jun 30, 2017 at 12:03:16PM -0400, Dan Book wrote:
> > How does that work without being copied to the final system?
>
> The creation of that file is within the /etc/rc.d/init.d/livesys file, I
> believe that is why it only applies to the live environment.

Yep! Now it all makes sense. Thanks :)

I definitely knew this at one time but it fell out of my brain, and I
didn't read the whole thing closely enough last night.