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import apt_pkg import cPickle import os import os.path import time import xapian
class CatalogedTime: PERSISTANCE_DIR = "/var/lib/apt-xapian-index/" CATALOGED_NAME = "cataloged_times.p"
def info(self): """ Return general information about the plugin.
The information returned is a dict with various keywords:
timestamp (required) the last modified timestamp of this data source. This will be used to see if we need to update the database or not. A timestamp of 0 means that this data source is either missing or always up to date. values (optional) an array of dicts { name: name, desc: description }, one for every numeric value indexed by this data source.
Note that this method can be called before init. The idea is that, if the timestamp shows that this plugin is currently not needed, then the long initialisation can just be skipped. """ fname = apt_pkg.config.find_file("Dir::Cache::pkgcache") if not os.path.exists(fname): return dict(timestamp = 0) return dict(timestamp = os.path.getmtime(fname), values = [ dict(name = "catalogedtime", desc = "Cataloged timestamp"), ] )
def init(self, info, progress): """ If needed, perform long initialisation tasks here.
info is a dictionary with useful information. Currently it contains the following values:
"values": a dict mapping index mnemonics to index numbers
The progress indicator can be used to report progress. """ if os.access(self.PERSISTANCE_DIR, os.W_OK): if not os.path.exists(self.PERSISTANCE_DIR): os.makedirs(self.PERSISTANCE_DIR) self._packages_cataloged_file = os.path.join(self.PERSISTANCE_DIR, self.CATALOGED_NAME) else: self._packages_cataloged_file = None if (self._packages_cataloged_file and os.path.exists(self._packages_cataloged_file)): self._package_cataloged_time = cPickle.load(open(self._packages_cataloged_file)) else: self._package_cataloged_time = {} self.now = time.time() values = info['values'] self.value = values.get("catalogedtime", -1)
def doc(self): """ Return documentation information for this data source.
The documentation information is a dictionary with these keys: name: the name for this data source shortDesc: a short description fullDoc: the full description as a chapter in ReST format """ return dict( name = "Cataloged time", shortDesc = "store the timestamp when the package was first cataloged", fullDoc = """ This datasource simply stores a value with the timestamp when the package was first cataloged. This is useful to e.g. implement a 'Whats new' feature. """ )
def index(self, document, pkg): """ Update the document with the information from this data source.
document is the document to update pkg is the python-apt Package object for this package """ time = self._package_cataloged_time.get(pkg.name, self.now) self._package_cataloged_time[pkg.name] = time document.add_value(self.value, xapian.sortable_serialise(time))
def indexDeb822(self, document, pkg): """ Update the document with the information from this data source.
This is alternative to index, and it is used when indexing with package data taken from a custom Packages file.
document is the document to update pkg is the Deb822 object for this package """ pass
def finished(self): """ Called when the indexing is finihsed """ if self._packages_cataloged_file: f=open(self._packages_cataloged_file+".new", "w") res = cPickle.dump(self._package_cataloged_time, f) f.close() os.rename(self._packages_cataloged_file+".new", self._packages_cataloged_file)
def init(**kw): """ Create and return the plugin object. """ apt_pkg.init_config() return CatalogedTime()
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