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Diffstat (limited to 'shared/prestoTransaction.py')
-rw-r--r-- | shared/prestoTransaction.py | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/shared/prestoTransaction.py b/shared/prestoTransaction.py new file mode 100644 index 0000000..bd3bfa1 --- /dev/null +++ b/shared/prestoTransaction.py @@ -0,0 +1,66 @@ +# author: Jonathan Dieter <jdieter@gmail.com> +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Library General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +# Copyright 2005 Duke University + +import os +import deltarpm + +def find_available_drpms(conduit, newpkg): + """Find any applicable drpms for newpkg + newpkg is a TransactionMember""" + + rpmdb = conduit.getRpmDB() + + # Saves us some typing + p_repo = newpkg.po.repo.p_repo + chosen_drpm = None + + if p_repo.enabled: + # Don't try to download deltarpm if full rpm already exists + if not os.path.exists(newpkg.po.localpath): + # First part of key when matching drpms + key1 = "%s*%s*%i*%s*%s" % (newpkg.name, newpkg.arch, int(newpkg.epoch), newpkg.version, newpkg.release) + + # Find any installed packages that match the ones we want to download + installed = rpmdb.searchNevra(newpkg.name, None, None, None, newpkg.arch) + + for oldpkg in installed: + # Generate second part of key for matching drpms, then full key + key2 = "%s*%s*%i*%s*%s" % (oldpkg.name, oldpkg.arch, int(oldpkg.epoch), oldpkg.version, oldpkg.release) + key = "%s!!%s" % (key1, key2) + + # Check whether we have a matching drpm + if p_repo.deltalist.has_key(key): + # Check whether or not we already have a matching drpm, then choose smallest of the two if we do + if chosen_drpm == None or p_repo.deltalist[key]['size'] < chosen_drpm['size']: + + # Get sequence code for drpm + sequence = p_repo.deltalist[key]['sequence'] + if int(oldpkg.epoch) == 0: + seq = "%s-%s-%s-%s" % (oldpkg.name, oldpkg.version, oldpkg.release, sequence) + else: + seq = "%s-%i:%s-%s-%s" % (oldpkg.name, int(oldpkg.epoch), oldpkg.version, oldpkg.release, sequence) + drpm = deltarpm.DeltaRpmWrapper(conduit) + + # Attempt to apply sequence code for drpm. If this fails, drpm will not apply cleanly, so + # don't even try to download it. + try: + drpm.verifySequence(seq) + chosen_drpm = p_repo.deltalist[key] + chosen_drpm['baseurl'] = p_repo.baseurl[0] + except: + conduit.info(5, "Verification of %s failed" % seq) + return chosen_drpm |