Split server and client

Signed-off-by: Jonathan Dieter <jdieter@gmail.com>

1 files changed, 97 insertions, 0 deletions

diff --git a/yum-presto/shared/prestoTransaction.py b/yum-presto/shared/prestoTransaction.py
new file mode 100644
index 0000000..3d387a4
--- /dev/null
+++ b/yum-presto/shared/prestoTransaction.py
@@ -0,0 +1,97 @@
+# 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()
+    
+    is_local = False
+    
+    # Set p_repo to be packages delta repository or set to False if
+    # there is no delta repository
+    try:
+        p_repo = newpkg.po.repo.p_repo
+        drpm_enabled = p_repo.enabled
+
+        po = newpkg.po
+        if hasattr(po, 'pkgtype') and po.pkgtype == 'local':
+            is_local = True
+        else:
+            local = po.localPkg()
+            if os.path.exists(local):
+                cursize = os.stat(local)[6]
+                totsize = long(po.size)
+                if not po.verifyLocalPkg():
+                    if cursize >= totsize: # otherwise keep it around for regetting
+                        os.unlink(local)
+                else:
+                    conduit.info(5, "using local copy of %s" % po)
+                    is_local = True
+
+    except:
+        conduit.info(5, "No Presto repository information for %s.%s %i:%s-%s" % (newpkg.name, newpkg.arch, int(newpkg.epoch), newpkg.version, newpkg.release))
+        drpm_enabled = False
+        is_local = False
+        
+    chosen_drpm = None
+    
+    # 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)
+
+    if installed == []:
+        is_installed = False
+    else:
+        is_installed = True
+        
+    
+    if is_installed and drpm_enabled and not is_local:
+        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, installed, is_local, drpm_enabled)