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# -*- coding: utf-8 -*-
"""
g_octave.description_tree
~~~~~~~~~~~~~~~~~~~~~~~~~
This module implements a Python object with the content of a directory
tree with DESCRIPTION files. The object contains *g_octave.Description*
objects for each DESCRIPTION file.
:copyright: (c) 2009-2010 by Rafael Goncalves Martins
:license: GPL-2, see LICENSE for more details.
"""
from __future__ import absolute_import
__all__ = ['DescriptionTree']
import glob
import os
import re
from .config import Config
from .description import Description
from .log import Log
from portage.versions import vercmp
log = Log('g_octave.description_tree')
config = Config()
# from http://wiki.python.org/moin/HowTo/Sorting/
def cmp_to_key(mycmp):
'Convert a cmp= function into a key= function'
class K(object):
def __init__(self, obj, *args):
self.obj = obj
def __lt__(self, other):
return mycmp(self.obj, other.obj) < 0
def __gt__(self, other):
return mycmp(self.obj, other.obj) > 0
def __eq__(self, other):
return mycmp(self.obj, other.obj) == 0
def __le__(self, other):
return mycmp(self.obj, other.obj) <= 0
def __ge__(self, other):
return mycmp(self.obj, other.obj) >= 0
def __ne__(self, other):
return mycmp(self.obj, other.obj) != 0
return K
class DescriptionTree(list):
def __init__(self, parse_sysreq=True):
log.info('Parsing the package database.')
list.__init__(self)
self._categories = [i.strip() for i in config.categories.split(',')]
for my_file in glob.glob(os.path.join(config.db, 'octave-forge', \
'**', '**', '*.DESCRIPTION')):
description = Description(my_file, parse_sysreq=parse_sysreq)
if description.CAT in self._categories:
self.append(description)
def package_versions(self, pn):
tmp = []
for pkg in self:
if pkg.PN == pn:
tmp.append(pkg.PV)
tmp.sort(key=cmp_to_key(vercmp))
return tmp
def latest_version(self, pn):
tmp = self.package_versions(pn)
return (len(tmp) > 0) and tmp[-1] or None
def latest_version_from_list(self, pv_list):
tmp = pv_list[:]
tmp.sort(key=cmp_to_key(vercmp))
return (len(tmp) > 0) and tmp[-1] or None
def search(self, term):
# term can be a regular expression
re_term = re.compile(r'%s' % term)
packages = {}
for pkg in self:
if re_term.search(pkg.PN) is not None:
if pkg.PN not in packages:
packages[pkg.PN] = []
packages[pkg.PN].append(pkg.PV)
packages[pkg.PN].sort(key=cmp_to_key(vercmp))
return packages
def list(self):
packages = {}
for category in self._categories:
packages[category] = {}
for pkg in self:
if pkg.PN not in packages[pkg.CAT]:
packages[pkg.CAT][pkg.PN] = []
packages[pkg.CAT][pkg.PN].append(pkg.PV)
packages[pkg.CAT][pkg.PN].sort(key=cmp_to_key(vercmp))
return packages
def get(self, p):
for pkg in self:
if pkg.P == p:
return pkg
return None
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