Re: Experiments with Crush
Does this mean that gnome-vfs, xfonts-base, xorg, xorg-server are core
components for Crush ???
I hope not. There are some embedded environments, which Crush would be
extremely well suited for, that do not require any GUI libraries or X
servers.
Think about a small http or ftp server. Maybe something that logs
temperatures (or some other real world signals) and the user can
download the logs via http, ftp, snmp, etc.
I think the crush core should be kept as minimal as possible. Identify
the minimal packages and get the core building reliably such that Crush
can be released. Other packages can then be layered on top of the core
as the end application requires.
Is that the plan ???
Cheers, Brendan.
On 18/03/10 7:23 AM, Neil Williams wrote:
> On Sat, 13 Mar 2010 21:08:49 +0000
> Neil Williams <codehelp@debian.org> wrote:
>
> I've prepared a shortlist of packages that will need functional changes
> in Crush:
>
> busybox Needs massive config changes to be bootable
> curl (disable ldap and ssh support, remove ca-certs)
> debconf (cdebconf support)
> dpkg (needs to predepend on busybox)
> gconf (remove ldap)
> hal (remove smbios)
> libidl (remove cpp dependency)
> gnome-vfs (remove samba dependency)
> gnupg (disable ldap)
> openssh (grep -x)
> sysvinit (perl maintainer scripts)
> udev (kill -s)
> xfonts-base (reduce number of default fonts)
> xorg (fmt used in maintainer scripts)
> xorg-server (disable GLX)
>
> Of those, debconf is meant to be being fixed as DI finally switch to
> cdebconf but that isn't going to happen for Squeeze. openssh, udev and
> xorg are the real issues - having to cross-build those merely to
> remove/reimplement options that the busybox version of grep cannot
> support is a real PITA.
>
> Need further testing
> avahi [0]
> base-files (mawk usage in maintainer scripts)
> fontconfig (bash postinst / defoma)
> pam (bash postinst)
>
> [0] I thought avahi would be one that would have to be changed but it's
> possible that the package is currently split well enough that the
> binary packages we need can be filtered from the ones we don't.
>
> The shortlist is subject to change because some dependencies have
> transitioned to new packages which were not cross-built for Crush 1.0.
>
> For the list to get this small, certain wrapper and helper scripts will
> be implemented - almost all as empty scripts that accept any and all
> arguments, good or bad, and which never, ever, ever exit non-zero.
>
> dpkg-divert
> update-alternatives
> defoma
> adduser (and permutations)
>
> install-info is already fixed.
>
> If packages use these scripts in Debian, multistrap configurations will
> HAVE to pre-empt the configuration that would have been performed by
> these scripts.
>
> When packages are brought in from Grip, a lintian check can be
> implemented to look for problems like using dpkg-divert with files
> in /usr/bin - adding that package to the Crush shortlist so that the
> diversions can be patched out or Conflicts: added. Diversions relating
> to files that are removed by Grip anyway can be ignored.
>
>
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