switch to new Plugin API

switch to using Plugin.LogError

2005/09/06 22:22:25-05:00 anl.gov!desai
Rename: src/lib/Server/Generators/Pkgmgr.py -> src/lib/Server/Plugins/Pkgmgr.py

(Logical change 1.300)


git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@1210 ce84e21b-d406-0410-9b95-82705330c041

1 files changed, 80 insertions, 0 deletions

diff --git a/src/lib/Server/Plugins/Pkgmgr.py b/src/lib/Server/Plugins/Pkgmgr.py
index e69de29bb..b9fe75558 100644
--- a/src/lib/Server/Plugins/Pkgmgr.py
+++ b/src/lib/Server/Plugins/Pkgmgr.py
@@ -0,0 +1,80 @@
+'''This module implements a package management scheme for all images'''
+__revision__ = '$Revision$'
+
+from copy import deepcopy
+from re import compile as regcompile
+
+from Bcfg2.Server.Plugin import Plugin, PluginInitError, PluginExecutionError, DirectoryBacked, XMLFileBacked
+
+class PackageEntry(XMLFileBacked):
+    '''PackageEntry is a set of packages and locations for a single image'''
+    __identifier__ = 'image'
+    rpm = regcompile('^(?P<name>[\w\+\d\.]+(-[\w\+\d\.]+)*)-(?P<version>[\w\d\.]+-([\w\d\.]+))\.(?P<arch>\w+)\.rpm$')
+
+    def Index(self):
+        '''Build internal data structures'''
+        XMLFileBacked.Index(self)
+        self.packages = {}
+        for location in self.entries:
+            for pkg in location.getchildren():
+                if pkg.attrib.has_key("simplefile"):
+                    self.packages[pkg.get('name')] = deepcopy(pkg.attrib)
+                    # most attribs will be set from pkg
+                    self.packages[pkg.get('name')]['uri'] = "%s/%s" % (location.get('uri'), pkg.get('simplefile'))
+                elif pkg.attrib.has_key("file"):
+                    mdata = self.rpm.match(pkg.get('file'))
+                    if not mdata:
+                        print "failed to rpm match %s" % (pkg.get('file'))
+                        continue
+                    pkgname = mdata.group('name')
+                    self.packages[pkgname] = mdata.groupdict()
+                    self.packages[pkgname]['file'] = pkg.get('file')
+                    self.packages[pkgname]['uri'] = location.get('uri')
+                    self.packages[pkgname]['type'] = 'rpm'
+                else:
+                    self.packages[pkg.get('name')] = pkg.attrib
+
+class PackageDir(DirectoryBacked):
+    '''A directory of package files'''
+    __child__ = PackageEntry
+
+class Pkgmgr(Plugin):
+    '''This is a generator that handles package assignments'''
+    __name__ = 'Pkgmgr'
+    __version__ = '$Id$'
+    __author__ = 'bcfg-dev@mcs.anl.gov'
+
+    def __init__(self, core, datastore):
+        Plugin.__init__(self, core, datastore)
+        try:
+            self.pkgdir = PackageDir(self.data, self.core.fam)
+        except OSError:
+            self.LogError("Pkgmgr: Failed to load package indices")
+            raise PluginInitError
+
+    def FindHandler(self, entry):
+        '''Non static mechanism of determining entry provisioning'''
+        if entry.tag != 'Package':
+            raise PluginExecutionError, (entry.tag, entry.get('name'))
+        return self.LocatePackage
+
+    def LocatePackage(self, entry, metadata):
+        '''Locates a package entry for particular metadata'''
+        pkgname = entry.get('name')
+        if self.pkgdir.entries.has_key("%s.xml" % metadata.hostname):
+            pkglist = self.pkgdir["%s.xml" % metadata.hostname]
+            if pkglist.packages.has_key(pkgname):
+                entry.attrib.update(pkglist.packages[pkgname])
+                return
+        elif not self.pkgdir.entries.has_key("%s.xml" % metadata.image):
+            self.LogError("Pkgmgr: no package index for image %s" % metadata.image)
+            raise PluginExecutionError, ("Image", metadata.image)
+        pkglist = self.pkgdir["%s.xml" % (metadata.image)]
+        if pkglist.packages.has_key(pkgname):
+            pkg = pkglist.packages[pkgname]
+            if pkg.get('type', None) == 'rpm':
+                entry.attrib.update({'url':"%s/%s" % (pkg['uri'], pkg['file']), 'version':pkg['version']})
+            else:
+                entry.attrib.update(pkg)
+        else:
+            raise PluginExecutionError, ("Package", pkgname)