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#!/usr/bin/python
#
# File: geneticone/helper.py
# This file is part of the Genetic/One-Project, a graphical portage-frontend.
#
# Copyright (C) 2006 Necoro d.M.
# This is free software. You may redistribute copies of it under the terms of
# the GNU General Public License version 2.
# There is NO WARRANTY, to the extent permitted by law.
#
# Written by Necoro d.M. <necoro@necoro.net> et.al.
from geneticone import *
import geneticone
import re
import os
import gentoolkit
import portage
from portage_util import unique_array
class BlockedException (Exception):
"""An exception marking, that some package is blocking another one."""
pass
class PackageNotFoundException (Exception):
"""An exception marking that a package could not be found."""
pass
class DependencyCalcError (Exception):
"""An error occured during dependency calculation."""
pass
def find_lambda (name):
"""Returns the function needed by all the find_all_*-functions. Returns None if no name is given.
@param name: name to build the function of
@type name: string
@returns:
1. None if no name is given
2. a lambda function
@rtype: function"""
if name != None:
return lambda x: re.match(".*"+name+".*",x)
else:
return lambda x: True
def geneticize_list (list_of_packages):
"""Convertes a list of gentoolkit.Packages into L{geneticone.Packages}.
@param list_of_packages: the list of packages
@type list_of_packages: list of gentoolkit.Packages
@returns: converted list
@rtype: list of geneticone.Packages"""
return [geneticone.Package(x) for x in list_of_packages]
def find_best_match (search_key, only_installed = False):
"""Finds the best match in the portage tree."""
t = None
if not only_installed:
t = porttree.dep_bestmatch(search_key)
else:
t = vartree.dep_bestmatch(search_key)
if t:
return geneticone.Package(t)
return None
def find_packages (search_key, masked=False):
"""This returns a list of packages which have to fit exactly. Additionally ranges like '<,>,=,~,!' et. al. are possible."""
return geneticize_list(gentoolkit.find_packages(search_key, masked))
def find_installed_packages (search_key, masked=False):
"""This returns a list of installed packages which have to fit exactly. Additionally ranges like '<,>,=,~,!' et. al. are possible."""
return geneticize_list(gentoolkit.find_installed_packages(search_key, masked))
def find_system_packages (name=None):
"""Returns a list-tuple (resolved_packages, unresolved_packages) for all system packages."""
list = gentoolkit.find_system_packages()
return (geneticize_list(list[0]), geneticize_list(list[1]))
def find_world_packages ():
"""Returns a list-tuple (resolved_packages, unresolved_packages) for all packages in the world-file."""
list = gentoolkit.find_world_packages()
return geneticize_list(list[0]),geneticize_list(list[1])
def find_all_installed_packages (name=None):
"""Returns a list of all installed packages matching ".*name.*".
Returns ALL installed packages if name is None."""
return geneticize_list(gentoolkit.find_all_installed_packages(find_lambda(name)))
def find_all_uninstalled_packages (name=None):
"""Returns a list of all uninstalled packages matching ".*name.*".
Returns ALL uninstalled packages if name is None."""
return geneticize_list(gentoolkit.find_all_uninstalled_packages(find_lambda(name)))
def find_all_packages (name=None):
"""Returns a list of all packages matching ".*name.*".
Returns ALL packages if name is None."""
return geneticize_list(gentoolkit.find_all_packages(find_lambda(name)))
def find_all_world_files (name=None):
"""Returns a list of all world packages matching ".*name.*".
Returns ALL world packages if name is None."""
world = filter(find_lambda(name), [x.get_cpv() for x in find_world_packages()[0]])
world = unique_array(world)
return [geneticone.Package(x) for x in world]
def find_all_system_files (name=None):
"""Returns a list of all system packages matching ".*name.*".
Returns ALL system packages if name is None."""
sys = filter(find_lambda(name), [x.get_cpv() for x in find_system_packages()[0]])
sys = unique_array(sys)
return [geneticone.Package(x) for x in sys]
def list_categories (name=None):
"""Returns a list of categories matching ".*name.*" or all categories."""
categories = gentoolkit.settings.categories
return filter(find_lambda(name), categories)
def split_package_name (name):
"""Returns a list in the form [category, name, version, revision]. Revision will
be 'r0' if none can be inferred. Category and version will be empty, if none can
be inferred."""
return gentoolkit.split_package_name(name)
def sort_package_list(pkglist):
"""Sorts a package list in the same manner portage does."""
return gentoolkit.sort_package_list(pkglist)
def am_i_root ():
"""Returns True if the current user is root, False otherwise."""
if os.getuid() == 0:
return True
else:
return False
use_descs = {}
local_use_descs = {}
def get_use_desc (flag, package = None):
"""Returns the description of a specific useflag or None if no desc was found.
If a package is given (in the <cat>/<name> format) the local use descriptions are searched too.
In the first run the dictionaries 'use_descs' and 'local_use_descs' are filled."""
# fill cache if needed
if use_descs == {} or local_use_descs == {}:
# read use.desc
fd = open(gentoolkit.settings["PORTDIR"]+"/profiles/use.desc")
for line in fd.readlines():
line = line.strip()
if line != "" and line[0] != '#':
fields = [x.strip() for x in line.split(" - ",1)]
if len(fields) == 2:
use_descs[fields[0]] = fields[1]
# read use.local.desc
fd = open(gentoolkit.settings["PORTDIR"]+"/profiles/use.local.desc")
for line in fd.readlines():
line = line.strip()
if line != "" and line[0] != '#':
fields = [x.strip() for x in line.split(":",1)]
if len(fields) == 2:
if not fields[0] in local_use_descs: # create
local_use_descs[fields[0]] = {}
subfields = [x.strip() for x in fields[1].split(" - ",1)]
if len(subfields) == 2:
local_use_descs[fields[0]][subfields[0]] = subfields[1]
# start
desc = None
if flag in use_descs:
desc = use_descs[flag]
if package != None:
if package in local_use_descs:
if flag in local_use_descs[package]:
desc = local_use_descs[package][flag]
return desc
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