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#!/usr/bin/python
"""
Program to update an existing bcfg2 Pkgmgr configuration file from a list
of directories that contain RPMS.
Only the epoch, version, release and simplefiles attributes are updated
in existing entries. All other entries and attributes are preserved.
This is a total hack until a proper more generalised system for managing
Pkgmgr configuation files is developed.
"""
__version__ = '0.1'
import sys
import os
import rpm
import optparse
import datetime
import glob
from elementtree.ElementTree import parse, XML, fromstring, tostring
installOnlyPkgs = ['kernel', 'kernel-bigmem', 'kernel-enterprise', 'kernel-smp',
'kernel-modules', 'kernel-debug', 'kernel-unsupported',
'kernel-source', 'kernel-devel', 'kernel-default',
'kernel-largesmp-devel', 'kernel-largesmp', 'kernel-xen',
'gpg-pubkey']
def readRpmHeader(ts, filename):
"""
Read an rpm header from an RPM file.
"""
try:
fd = os.open(filename, os.O_RDONLY)
except:
print 'Failed to open RPM file %s' % filename
h = ts.hdrFromFdno(fd)
os.close(fd)
return h
def sortedDictValues(adict):
"""
Sort a dictionary by its keys and return the items in sorted key order.
"""
keys = adict.keys()
keys.sort()
return map(adict.get, keys)
def cmpRpmHeader(a, b):
"""
cmp() implemetation suitable for use with sort.
"""
n1 = str(a.get('name'))
e1 = str(a.get('epoch'))
v1 = str(a.get('version'))
r1 = str(a.get('release'))
n2 = str(b.get('name'))
e2 = str(b.get('epoch'))
v2 = str(b.get('version'))
r2 = str(b.get('release'))
return rpm.labelCompare((e1, v1, r1),(e2, v2, r2))
def loadRpms(dirs):
"""
dirs is a list of directories to search for rpms.
Builds a multilevel dictionary keyed by the package name and arch.
Arch dictionary item is a list, one entry per package instance found.
The list entries are dictionaries. Keys are 'filename', 'mtime' 'name',
'arch', 'epoch', 'version' and 'release'.
e.g.
packages = {
'bcfg2' : { 'noarch' : [ {'filename':'bcfg2-0.9.2-0.0rc1.noarch.rpm', 'mtime':'' 'name':'bcfg2',
'arch':'noarch', 'epoch':None, 'version':'0.9.2', 'release':'0.0rc1'}
{'filename':'bcfg2-0.9.2-0.0rc5.noarch.rpm', 'mtime':'' 'name':'bcfg2',
'arch':'noarch', 'epoch':None, 'version':'0.9.2', 'release':'0.0rc5'}]},
'bcfg2-server' { 'noarch' : [ {'filename':'bcfg2-server-0.9.2-0.0rc1.noarch.rpm', 'mtime':'' 'name':'bcfg2-server',
'arch':'noarch', 'epoch':None, 'version':'0.9.2', 'release':'0.0rc1'}
{'filename':'bcfg2-server-0.9.2-0.0rc5.noarch.rpm', 'mtime':'' 'name':"bcfg2-server',
'arch':'noarch', 'epoch':None, 'version':'0.9.2', 'release':'0.0rc5'}]},
}
"""
packages = {}
ts = rpm.TransactionSet()
vsflags = 0
vsflags |= rpm._RPMVSF_NODIGESTS
vsflags |= rpm._RPMVSF_NOSIGNATURES
ovsflags = ts.setVSFlags(vsflags)
for dir in dirs:
if options.verbose:
print 'Scanning directory: %s' % dir
for file in [files for files in os.listdir(dir)
if files.endswith('.rpm')]:
filename = os.path.join( dir, file )
# Get the mtime of the RPM file.
file_mtime = datetime.date.fromtimestamp(os.stat(filename).st_mtime)
# Get the RPM header
header = readRpmHeader( ts, filename )
# Get what we are interesting in out of the header.
name = header[rpm.RPMTAG_NAME]
epoch = header[rpm.RPMTAG_EPOCH]
version = header[rpm.RPMTAG_VERSION]
release = header[rpm.RPMTAG_RELEASE]
subarch = header[rpm.RPMTAG_ARCH]
if name not in installOnlyPkgs:
packages.setdefault(name, {}).setdefault(subarch, []).append({'filename':file, \
'mtime':file_mtime, 'name':name, 'arch':subarch, \
'epoch':epoch, 'version':version, 'release':release})
if options.verbose:
sys.stdout.write('.')
sys.stdout.flush()
if options.verbose:
sys.stdout.write('\n')
return packages
def str_evra(instance):
"""
Convert evra dict entries to a string.
"""
if instance.get('epoch', '*') == '*' or instance.get('epoch', '*') == None:
return '%s-%s.%s' % (instance.get('version', '*'), instance.get('release', '*'),
instance.get('arch', '*'))
else:
return '%s:%s-%s.%s' % (instance.get('epoch', '*'), instance.get('version', '*'),
instance.get('release', '*'), instance.get('arch', '*'))
def updatepkg(pkg):
"""
"""
global package_dict
name = pkg.get('name')
if name not in installOnlyPkgs:
for inst in [inst for inst in pkg if inst.tag == 'Instance']:
arch = inst.get('arch')
if package_dict.has_key(name):
if package_dict[name].has_key(arch):
package_dict[name][arch].sort(cmpRpmHeader)
latest = package_dict[name][arch][-1]
if cmpRpmHeader(inst, latest) == -1:
if options.verbose:
print 'Found newer version of package %s' % name
print ' Updating %s to %s' % (str_evra(inst), str_evra(latest))
if latest['epoch'] != None:
inst.attrib['epoch'] = str(latest['epoch'])
inst.attrib['version'] = latest['version']
inst.attrib['release'] = latest['release']
if pkg.get('type') == 'yum':
inst.attrib['simplefile'] = latest['filename']
def main():
global package_dict
if options.verbose:
print 'Loading Pkgmgr config file %s.' % (options.configfile)
tree = parse(options.configfile)
config = tree.getroot()
if options.verbose:
print 'Loading package headers'
package_dict = loadRpms(search_dirs)
if options.verbose:
print 'Processing package headers'
for pkg in config.getiterator('Package'):
updatepkg(pkg)
output.write(tostring(config))
if __name__ == "__main__":
p = optparse.OptionParser()
p.add_option('--configfile', '-c', action='store', \
type='string', \
help='Existing Pkgmgr configuration file name.')
p.add_option('--rpmdirs', '-d', action='store',
default='.', \
type='string', \
help='Comma separated list of directories to scan for RPMS. Wilcards are permitted. (Default: .)')
p.add_option('--outfile', '-o', action='store', \
type='string', \
help='Output file name or new Pkgrmgr file.')
p.add_option('--verbose', '-v', action='store_true', \
help='Enable verbose output.')
options, arguments = p.parse_args()
if not options.configfile:
print "An existing Pkgrmgr configuration file must be specified with the -c option."
sys.exit()
# Set up list of directories to search
search_dirs = []
for d in options.rpmdirs.split(','):
search_dirs += glob.glob(d)
if options.verbose:
print 'The following directories will be scanned:'
for d in search_dirs:
print ' %s' % d
if options.outfile:
output = file(options.outfile, "w")
else:
output = sys.stdout
package_dict = {}
main()
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