diff options
Diffstat (limited to 'src/lib/Server/Plugins/Deps.py')
-rw-r--r-- | src/lib/Server/Plugins/Deps.py | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/src/lib/Server/Plugins/Deps.py b/src/lib/Server/Plugins/Deps.py deleted file mode 100644 index 9b848baae..000000000 --- a/src/lib/Server/Plugins/Deps.py +++ /dev/null @@ -1,134 +0,0 @@ -"""This plugin provides automatic dependency handling.""" - -import lxml.etree - -import Bcfg2.Server.Plugin - - -class DNode(Bcfg2.Server.Plugin.INode): - """DNode provides supports for single predicate types for dependencies.""" - raw = {'Group': "lambda m, e:'%(name)s' in m.groups and predicate(m, e)"} - containers = ['Group'] - - def __init__(self, data, idict, parent=None): - self.data = data - self.contents = {} - if parent == None: - self.predicate = lambda x, d: True - else: - predicate = parent.predicate - if data.tag in list(self.raw.keys()): - self.predicate = eval(self.raw[data.tag] % - {'name': data.get('name')}, - {'predicate': predicate}) - else: - raise Exception - mytype = self.__class__ - self.children = [] - for item in data.getchildren(): - if item.tag in self.containers: - self.children.append(mytype(item, idict, self)) - else: - data = [(child.tag, child.get('name')) - for child in item.getchildren()] - try: - self.contents[item.tag][item.get('name')] = data - except KeyError: - self.contents[item.tag] = {item.get('name'): data} - - -class DepXMLSrc(Bcfg2.Server.Plugin.XMLSrc): - __node__ = DNode - - -class Deps(Bcfg2.Server.Plugin.PrioDir, - Bcfg2.Server.Plugin.StructureValidator): - name = 'Deps' - __author__ = 'bcfg-dev@mcs.anl.gov' - __child__ = DepXMLSrc - - # Override the default sort_order (of 500) so that this plugin - # gets handled after others running at the default. In particular, - # we want to run after Packages, so we can see the final set of - # packages that will be installed on the client. - sort_order = 750 - - def __init__(self, core, datastore): - Bcfg2.Server.Plugin.PrioDir.__init__(self, core, datastore) - Bcfg2.Server.Plugin.StructureValidator.__init__(self) - self.cache = {} - - def HandleEvent(self, event): - self.cache = {} - Bcfg2.Server.Plugin.PrioDir.HandleEvent(self, event) - - def validate_structures(self, metadata, structures): - """Examine the passed structures and append any additional - prerequisite entries as defined by the files in Deps. - """ - entries = [] - for structure in structures: - for entry in structure.getchildren(): - tag = entry.tag - if tag.startswith('Bound'): - tag = tag[5:] - if (tag, entry.get('name')) not in entries \ - and not isinstance(entry, lxml.etree._Comment): - entries.append((tag, entry.get('name'))) - entries.sort() - entries = tuple(entries) - gdata = list(metadata.groups) - gdata.sort() - gdata = tuple(gdata) - - # Check to see if we have cached the prereqs already - if (entries, gdata) in self.cache: - prereqs = self.cache[(entries, gdata)] - else: - prereqs = self.calculate_prereqs(metadata, entries) - self.cache[(entries, gdata)] = prereqs - - newstruct = lxml.etree.Element("Independent") - for tag, name in prereqs: - try: - lxml.etree.SubElement(newstruct, tag, name=name) - except: - self.logger.error("Failed to add dep entry for %s:%s" % (tag, name)) - structures.append(newstruct) - - - def calculate_prereqs(self, metadata, entries): - """Calculate the prerequisites defined in Deps for the passed - set of entries. - """ - prereqs = [] - [src.Cache(metadata) for src in self.entries.values()] - - toexamine = list(entries[:]) - while toexamine: - entry = toexamine.pop() - matching = [src for src in list(self.entries.values()) - if src.cache and entry[0] in src.cache[1] - and entry[1] in src.cache[1][entry[0]]] - if len(matching) > 1: - prio = [int(src.priority) for src in matching] - if prio.count(max(prio)) > 1: - self.logger.error("Found conflicting %s sources with same priority for %s, pkg %s" % - (entry[0].lower(), metadata.hostname, entry[1])) - raise Bcfg2.Server.Plugin.PluginExecutionError - index = prio.index(max(prio)) - matching = [matching[index]] - elif len(matching) == 1: - for prq in matching[0].cache[1][entry[0]][entry[1]]: - # XML comments seem to show up in the cache as a - # tuple with item 0 being callable. The logic - # below filters them out. Would be better to - # exclude them when we load the cache in the first - # place. - if prq not in prereqs and prq not in entries and not callable(prq[0]): - toexamine.append(prq) - prereqs.append(prq) - else: - continue - - return prereqs |