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# -*- coding: utf-8 -*-
"""
description_tree.py
~~~~~~~~~~~~~~~~~~~
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 os
import re
from portage.versions import vercmp
from .config import Config, ConfigException
from .description import *
from .exception import DescriptionTreeException
from .log import Log
log = Log('g_octave.description_tree')
# 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(object):
def __init__(self, conf=None, parse_sysreq=True):
log.info('Parsing the package database.')
self._parse_sysreq = parse_sysreq
self.pkg_list = {}
if conf is None:
conf = Config()
self._config = conf
self._db_path = os.path.join(conf.db, 'octave-forge')
if not os.path.isdir(self._db_path):
log.error('Invalid db: %s' % self._db_path)
raise DescriptionTreeException('Invalid db: %s' % self._db_path)
self.categories = {}
for cat in [i.strip() for i in conf.categories.split(',')]:
catdir = os.path.join(self._db_path, cat)
if os.path.isdir(catdir):
self.pkg_list[cat] = []
pkgs = os.listdir(catdir)
for pkg in pkgs:
pkgdir = os.path.join(catdir, pkg)
for desc_file in os.listdir(pkgdir):
pkg_p = desc_file[:-len('.DESCRIPTION')]
mypkg = re_pkg_atom.match(pkg_p)
if mypkg is None:
log.error('Invalid Atom: %s' % mypkg)
raise DescriptionTreeException('Invalid Atom: %s' % mypkg)
if not parse_sysreq:
self.categories[mypkg.group(1)] = cat
self.pkg_list[cat].append({
'name': mypkg.group(1),
'version': mypkg.group(2),
})
def __getitem__(self, key):
mykey = re_pkg_atom.match(key)
if mykey == None:
return None
name = mykey.group(1)
version = mykey.group(2)
for cat in self.pkg_list:
for pkg in self.pkg_list[cat]:
if pkg['name'] == name and pkg['version'] == version:
pkgfile = os.path.join(
self._db_path,
cat,
pkg['name'],
'%s-%s.DESCRIPTION' % (pkg['name'], pkg['version']),
)
return Description(
pkgfile,
conf = self._config,
parse_sysreq = self._parse_sysreq
)
return None
def package_versions(self, pkgname):
tmp = []
for cat in self.pkg_list:
for pkg in self.pkg_list[cat]:
if pkg['name'] == pkgname:
tmp.append(pkg['version'])
tmp.sort(key=cmp_to_key(vercmp))
return tmp
def latest_version(self, pkgname):
tmp = self.package_versions(pkgname)
return (len(tmp) > 0) and tmp[-1] or None
def version_compare(self, versions):
tmp = list(versions[:])
tmp.sort(key=cmp_to_key(vercmp))
return (len(tmp) > 0) and tmp[-1] or None
def packages(self):
packages = []
for cat in self.pkg_list:
for pkg in self.pkg_list[cat]:
packages.append(pkg['name'] + '-' + pkg['version'])
packages.sort()
return packages
def search(self, term):
# term can be a regular expression
re_term = re.compile(r'%s' % term)
packages = {}
for cat in self.pkg_list:
for pkg in self.pkg_list[cat]:
if re_term.search(pkg['name']) is not None:
if pkg['name'] not in packages:
packages[pkg['name']] = [pkg['version'], '9999']
else:
packages[pkg['name']].insert(-1, pkg['version'])
packages[pkg['name']].sort(key=cmp_to_key(vercmp))
return packages
def list(self):
packages = {}
for cat in self.pkg_list:
packages[cat] = {}
for pkg in self.pkg_list[cat]:
if pkg['name'] not in packages[cat]:
packages[cat][pkg['name']] = [pkg['version'], '9999']
else:
packages[cat][pkg['name']].insert(-1, pkg['version'])
packages[cat][pkg['name']].sort(key=cmp_to_key(vercmp))
return packages
|
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