Coax yum list updates to report full file names

[Jay Cliburn]

I run rawhide at home, but my network connection is only a 256/128 DSL.
This makes large yum updates (like today's 385ish MB behemoth) rather
lengthy.  OTOH, I have an OC-48 network connection at work, with a
Cygwin installation on my office PC.

What I'd like to do is generate a list of properly formatted filenames
from the yum list updates command on the rawhide machine, then take that
list to work and feed it to a script that wgets each file from a mirror
over the OC-48 connection.  Then I can just dump the files to a thumb
drive and do the update from it when I get home.

Unfortunately, I can't find a way to coax yum into spitting out the full
filename of a needed rpm.  The filename I want gets written into the yum
cache headers directory -- albeit with a .hdr extension -- but it
doesn't get written to stdout without clutter.  The manpage doesn't seem
to offer a method to format the output of the yum list updates command,
unless I'm not understanding what I've read, and I can't find a plugin
at Duke that does this.

It would be really nice if I could pass yum a format argument, like:
yum --format=rpmname list updates

I'd expect this command to return, for example,
gdm-2.15.5-3.1.x86_64.rpm

Instead of the current (sans the --format arg)
gdm.x86_64     1:2.15.5-3.1     development     

Has someone already cracked this nut?

Thanks,
Jay

[Charles Curley]

On Wed, Jul 12, 2006 at 07:42:19PM -0500, Jay Cliburn wrote:
>  I run rawhide at home, but my network connection is only a 256/128
> DSL.
>  This makes large yum updates (like today's 385ish MB behemoth) rather
>  lengthy.  OTOH, I have an OC-48 network connection at work, with a
>  Cygwin installation on my office PC.
>  
>  What I'd like to do is generate a list of properly formatted filenames
>  from the yum list updates command on the rawhide machine, then take that
>  list to work and feed it to a script that wgets each file from a mirror
>  over the OC-48 connection.  Then I can just dump the files to a thumb
>  drive and do the update from it when I get home. 
Can you set up a cron job to slurp it in starting some time after you
usually go to bed?

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[Jay Cliburn]

On Wed, Jul 12, 2006 at 09:02:43PM -0600, Charles Curley wrote:
>  On Wed, Jul 12, 2006 at 07:42:19PM -0500, Jay Cliburn wrote:
>  > I run rawhide at home, but my network connection is only a 256/128 DSL.
>  > This makes large yum updates (like today's 385ish MB behemoth) rather
>  > lengthy.  OTOH, I have an OC-48 network connection at work, with a
>  > Cygwin installation on my office PC.
>  > 
>  > What I'd like to do is generate a list of properly formatted filenames
>  > from the yum list updates command on the rawhide machine, then take that
>  > list to work and feed it to a script that wgets each file from a mirror
>  > over the OC-48 connection.  Then I can just dump the files to a thumb
>  > drive and do the update from it when I get home.
>  
>  Can you set up a cron job to slurp it in starting some time after you
>  usually go to bed? 
Unfortunately, the rawhide machine is in my bedroom and I prefer not to have it powered up
all night.

I made a one-line change to /usr/share/yum-cli/output.py to cause 'yum list
updates' to format the output my way, but of course that's not really a durable
solution because the next version of yum will replace output.py.  Paul Howarth's
script method (described an a separate reply) is more durable, but I prefer a direct yum
solution, so I've begun looking into creating a yum plugin. 

Thanks for your reply.

For completeness, the output.py change is documented below.

Jay

[jcliburn@osprey ~]$ diff -u /usr/share/yum-cli/output.py.orig
/usr/share/yum-cli/output.py 
--- /usr/share/yum-cli/output.py.orig   2006-07-12 21:53:53.000000000 -0500
+++ /usr/share/yum-cli/output.py        2006-07-13 08:40:04.000000000 -0500
@@ -65,7 +65,7 @@
         na = '%s.%s' % (pkg.name, pkg.arch)
         repo = pkg.returnSimple('repoid')
         
-        print "%-40.40s %-22.22s %-16.16s" % (na, ver, repo)
+        print "%s-%s-%s.%s.rpm" % (pkg.name, pkg.version, pkg.release,
pkg.arch)
     
         
     def infoOutput(self, pkg):

[Paul Howarth]

On Wed, 2006-07-12 at 19:42 -0500, Jay Cliburn wrote:
>  I run rawhide at home, but my network connection is only a 256/128
> DSL.
>  This makes large yum updates (like today's 385ish MB behemoth) rather
>  lengthy.  OTOH, I have an OC-48 network connection at work, with a
>  Cygwin installation on my office PC.
>  
>  What I'd like to do is generate a list of properly formatted filenames
>  from the yum list updates command on the rawhide machine, then take that
>  list to work and feed it to a script that wgets each file from a mirror
>  over the OC-48 connection.  Then I can just dump the files to a thumb
>  drive and do the update from it when I get home.
>  
>  Unfortunately, I can't find a way to coax yum into spitting out the full
>  filename of a needed rpm.  The filename I want gets written into the yum
>  cache headers directory -- albeit with a .hdr extension -- but it
>  doesn't get written to stdout without clutter.  The manpage doesn't seem
>  to offer a method to format the output of the yum list updates command,
>  unless I'm not understanding what I've read, and I can't find a plugin
>  at Duke that does this.
>  
>  It would be really nice if I could pass yum a format argument, like:
>  yum --format=rpmname list updates
>  
>  I'd expect this command to return, for example,
>  gdm-2.15.5-3.1.x86_64.rpm
>  
>  Instead of the current (sans the --format arg)
>  gdm.x86_64     1:2.15.5-3.1     development     
>  
>  Has someone already cracked this nut? 
Shouldn't be too difficult to script something for this.

Like this for instance:

# yum -d0 check-update |
	awk '/./ { print $1 }' |
	xargs yumdownloader --urls |
	awk '/\.rpm$/ { sub(".*/", ""); print }'

(you need yumdownloader from the yum-utils package)

Paul.