On Mon, 23 Aug 2004, Bogdan Costescu wrote:
> While trying to use --installroot to set up some cluster nodes, I came
> across the problem of specifying the architecture of the machine that
> will run the software from installroot.
... and apparently some parts of the problem can be solved and others
can't.
First the good news: the part that is doable is being able to specify
athlon when running on an i686 or lower and vice-versa. The patch at
the end of this message (against yum-2.0.7 that comes with TaoLinux,
so there might be some offsets due to the "protectbase" patch)
implements this by simply fooling archwork.bestarch() to return the
"forced" architecture _if_ the architecture is part of the list (=
there is a package for that architecture). The implementation might
not be the best as I tried to make the minimum of modifications to the
source.
Then the bad news: the part that is not doable is being able to
specify an architecture whose $basearch is different from the install
machine's $basearch (like sparc vs. i386). By fooling with
archwork.getArch() I was able to make yum choose f.e. x86_64 packages
on an i686, but rpm refused to install these packages. So unless some
kind of "cross-rpm" (analogy to cross-compilation) comes up, this is
not doable. The only exception would probably be making an i686/athlon
installroot on a x86_64, in which case the patch would still be
useful...
I do not ask for inclusion of this patch in the official sources, I
merely present it here to be archived for people that might be looking
for this functionality.
diff -Nur yum-2.0.7-orig/archwork.py yum-2.0.7/archwork.py
--- yum-2.0.7-orig/archwork.py 2004-05-07 06:58:34.000000000 +0200
+++ yum-2.0.7/archwork.py 2004-08-26 15:48:06.000000000 +0200
@@ -19,6 +19,8 @@
import rpm
import re
+forcedarch = ""
+
def getArch():
arch = os.uname()[4]
newarch = None
@@ -59,6 +61,8 @@
del score2
def bestarch(archlist):
+ if forcedarch != "" and forcedarch in archlist:
+ return forcedarch
currentarch = archlist[0]
for arch in archlist[1:]:
currentarch = betterarch(currentarch, arch)
diff -Nur yum-2.0.7-orig/yummain.py yum-2.0.7/yummain.py
--- yum-2.0.7-orig/yummain.py 2004-08-26 15:46:19.000000000 +0200
+++ yum-2.0.7/yummain.py 2004-08-26 15:48:06.000000000 +0200
@@ -19,6 +19,7 @@
import fcntl
import sys
import getopt
+import archwork
import clientStuff
import nevral
import pkgaction
@@ -51,6 +52,7 @@
try:
gopts, cmds = getopt.getopt(args, 'tCc:fhR:e:d:y', ['help', 'version',
'installroot=',
+ 'installrootarch=',
'exclude=',
'download-only'])
except getopt.error, e:
@@ -65,6 +67,8 @@
if o == '--installroot':
if os.access(a + "/etc/yum.conf", os.R_OK):
yumconffile = a + '/etc/yum.conf'
+ if o == '--installrootarch':
+ archwork.forcedarch = a
if o == '-R':
sleeptime=random.randrange(int(a)*60)
# debug print sleeptime
--
Bogdan Costescu
IWR - Interdisziplinaeres Zentrum fuer Wissenschaftliches Rechnen
Universitaet Heidelberg, INF 368, D-69120 Heidelberg, GERMANY
Telephone: +49 6221 54 8869, Telefax: +49 6221 54 8868
E-mail: Bogdan.Costescu@xxxxxxxxxxxxxxxxxxxxx
