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import rpm
def dEBUG(str):
print str
def addNewPackageToUpgSet(pkgDict, pkg):
"""Check to see if there's already a pkg by the name of pkg already
in our dictionary. If not, add this one. If there is, see if
this one is 'newer' or has a 'better' arch."""
name = pkg[rpm.RPMTAG_NAME]
if not pkgDict.has_key(name):
# nope
pkgDict[name] = pkg
else:
# first check version
val = rpm.versionCompare(pkgDict[name], pkg)
if val < 0:
# we're newer, add this one
pkgDict[name] = pkg
elif val == 0:
# same version, so check the architecture
newscore = rpm.archscore(pkg[rpm.RPMTAG_ARCH])
oldscore = pkgDict[name][rpm.RPMTAG_ARCH]
if newscore and newscore < oldscore:
# if the score is less, we're "better"
pkgDict[name] = pkg
def findpackageset(hdlist, dbPath='/'):
ts = rpm.TransactionSet(dbPath)
ts.setVSFlags(rpm.RPMVSF_NORSA|rpm.RPMVSF_NODSA)
ts.setFlags(rpm.RPMTRANS_FLAG_NOMD5)
pkgDict = {}
# first loop through packages and find ones which are a newer
# version than what we have
for pkg in hdlist:
mi = ts.dbMatch('name', pkg[rpm.RPMTAG_NAME])
for h in mi:
val = rpm.versionCompare(h, pkg)
if (val > 0):
# dEBUG("found older version of %(name)s" % h)
pass
elif (val < 0):
# dEBUG("found newer version of %(name)s" % h)
# check if we already have this package in our dictionary
addNewPackageToUpgSet(pkgDict, pkg)
else:
# dEBUG("found same verison of %(name)s" % h)
pass
# handle obsoletes
for pkg in hdlist:
if pkg[rpm.RPMTAG_NAME] in pkgDict.keys():
# dEBUG("%(name)s is already selected" % pkg)
continue
if pkg[rpm.RPMTAG_OBSOLETENAME] is not None:
for obs in pkg[rpm.RPMTAG_OBSOLETENAME]:
mi = ts.dbMatch('name', obs)
# FIXME: I should really iterate over all matches and verify
# versioned obsoletes, but nothing in Red Hat Linux uses
# them, so I'll optimize
for h in mi:
# dEBUG("adding %(name)s to the upgrade set for obsoletes" % pkg)
addNewPackageToUpgSet(pkgDict, pkg)
break
return pkgDict.values()
if __name__ == "__main__":
import sys, os
if len(sys.argv) < 2:
print "Usage: %s /path/to/tree [rootpath]" %(sys.argv[0],)
sys.exit(0)
tree = sys.argv[1]
if len(sys.argv) >= 3:
instPath = sys.argv[2]
else:
instPath = "/"
fd = os.open("%s/RedHat/base/hdlist" %(tree,), os.O_RDONLY)
hdlist = rpm.readHeaderListFromFD(fd)
os.close(fd)
packages = findpackageset(hdlist, instPath)
for pkg in packages:
print pkg[rpm.RPMTAG_NAME]
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