SethVidal/YumCodeSnippets

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Yum Code Snippets

This is just snippets of code using the yum modules for common/simple tasks. Add/edit/comment as you'd like.

Open a local package as a yum package object w/o all the rest of the yum stuff:

import yum.packages
import rpmUtils.transaction
ts = rpmUtils.transaction.initReadOnlyTransaction()
lp = yum.packages.YumLocalPackage(ts, '/home/skvidal/yum-3.2.8-1.noarch.rpm')

replace '/home/skvidal/yum-3.2.8-1.noarch.rpm' with the full path to the package

Return the gpg signature info from a package:

import yum.packages
import rpmUtils.transaction
from rpmUtils.miscutils import getSigInfo
ts = rpmUtils.transaction.initReadOnlyTransaction()
lp = yum.packages.YumLocalPackage(ts, '/home/skvidal/yum-3.2.8-1.noarch.rpm')

print getSigInfo(lp.hdr)

Given a filename of an rpm parse out the major information that's available:

from rpmUtils.miscutils import splitFilename

myfn = 'a2ps-4.13b-57.1.el5.src.rpm'

(name, ver, rel, epoch, arch) = splitFilename(myfn)

Simplest transaction you can have (yum 3.2.7 and above):

import yum
my = yum.YumBase()
my.install(name='somepackage')
my.remove(name='someotherpackage')
my.resolveDeps()
my.processTransaction()

This helps you setup a repo at an arbitrary location, as a user and play with the object. Paste this into a file then run it with ipython for maximum usefulness like:

ipython ./thisfile.py url://to/my/repo

import yum, os, sys
my = yum.YumBase()
my.conf.basecachedir = '/tmp/whereever'
if not os.path.exists(my.conf.basecachedir):
os.makedirs(my.conf.basecachedir)
my.conf.cache = 0
url = sys.argv[1] 

my.repos.disableRepo('*')

newrepo = yum.yumRepo.YumRepository('myrepo')
newrepo.name = 'myrepo - %s' % url
newrepo.baseurl = [url] 
newrepo.basecachedir = my.conf.basecachedir
newrepo.enablegroups = True
my.repos.add(newrepo)
my.repos.enableRepo(newrepo.id)
my.doRepoSetup(thisrepo=newrepo.id)

Search for which package(s) own a file on the system

import yum
my = yum.YumBase()
pkgs = my.rpmdb.whatProvides('/boot/vmlinuz-2.6.23.9-85.fc8', None, (None, None,None))
for pkg in pkgs:
print pkg

more?