Re: [gentoo-embedded] quickpkg and PKG_INSTALL_MASK

[Joakim Tjernlund]

solar <solar@g.o> wrote on 2011/12/26 21:38:52:
>
> On Mon, 2011-12-26 at 19:03 +0100, Joakim Tjernlund wrote:
> > solar <solar@g.o> wrote on 2011/12/25 18:52:52:
> > >
> > > On Sun, 2011-12-25 at 11:34 +0200, Kfir Lavi wrote:
> > > >
> > > >
> > > > On Fri, Dec 23, 2011 at 3:23 PM, Joakim Tjernlund
> > > > <joakim.tjernlund@×××××××××.se> wrote:
> > > >
> > > >         I got the impression from docs that PKG_INSTALL_MASK would
> > > >         actually
> > > >         mask files out so they never get into the binary package, this
> > > >         doesn't
> > > >         seem to happen.
> > > >         Did I misunderstand? If I did, I think an MASK to do the above
> > > >         would be a worthy addition to quickpkg, very useful for
> > > >         embedded targets to keep the pkg size down.
> > > >         Also PKG_INSTALL_KEEP which would list files keep(rest is
> > > >         dropped) would be nice.
> > > >
> > > >         Oh, something else I wonder about. How does pre/post install
> > > >         work with
> > > >         quickpkgs? Is it possible to have such scripts and then have
> > > >         qmerge execute
> > > >         them?
> > > >
> > > >         Jocke
> > > >
> > > >
> > > > Yes, PKG_INSTALL_MASK on time of installation will mask the files
> > > > defined in it.
> > > > Binary package do contain all files, even the masked files.
> > > > Kfir
> > >
> > >
> > > $PKG_INSTALL_MASK is supposed to omit the files in it's list from making
> > > it into the binary pkgs in the first place. The idea there was to make
> > > smaller binary pkgs for embedded devices and such (for use only with
> > > private repos).
> > >
> > > $INSTALL_MASK is supposed to omit the files listed in it from being
> > > installed on the file system.
> >
> > Hi Solar, long time no see :)
> >
> > So the current behaviour is a bug, good to know.
>
> I would not really call it a bug. *INSTALL_MASK is a portage feature
> itself. quickpkg does not support all the features of portage itself.
> You could/should file a feature request bug for quickpkg to add such
> support. Maybe file a bug for portage-utils@ as well because I just
> checked and looks like we never added support for PKG_INSTALL_MASK in
> qpkg.c (c version of quickpkg)

I don't really get the difference between the two as impl. today.
What can PKG_INSTALL_MASK do that INSTALL_MASK can't(or vice versa)?

>
>
> > I am contemplating a greater problem too. Our system require we can install
> > multiple versions of our SW and switch between them. This is easy to do when it
> > comes to our own app but not when one want to upgrade core parts of the system, like
> > libc etc.
> >
> > So I am thinking one could use --bind mounts and switch_root to solve that. Basically
> > one has a skeleton root FS with /bin, /lib, /usr /opt etc.
> > Each upgrade goes into dirs like:
> >   bin_1.x.y/ usr_1.x.y/ lib_1.x.y/ opt_1.x.y/ sbin_1.x.y/
> > Then, from an initramfs, one selects which of xxx_1.x.y dir one wants to use
> > and --bind mounts them under the corresponding skeleton dir.
> >
> > To do that one needs an way to repackage a root fs created by a bunch of different
> > ebuilds, some of them spanning several of the above dirs, into a package per xx_1.x.y dir.
> > Not sure if this can be done with the current portage/portage-utils and how, any
> > ideas welcome :)
> >
> > Perhaps there is a better way then the above?
> >
> >  Jocke
>
> Not sure about all this.

Yeah, it is a bit much :) I either case it would be nice if one
could group several bianry pkgs into one that qmerge can install. Is that possible?

 Jocke