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# -*- coding: utf-8 -*-
#
# File: portato/helper.py
# This file is part of the Portato-Project, a graphical portage-frontend.
#
# Copyright (C) 2006-2009 René 'Necoro' Neumann
# 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 René 'Necoro' Neumann <necoro@necoro.net> et.al.
"""
Some nice functions used in the program.
"""
from __future__ import absolute_import, with_statement
import os, signal, logging, grp
from .log import set_log_level
debug = logging.getLogger("portatoLogger").debug
info = logging.getLogger("portatoLogger").info
warning = logging.getLogger("portatoLogger").warning
error = logging.getLogger("portatoLogger").error
critical = logging.getLogger("portatoLogger").critical
def N_ (s):
return s
def send_signal_to_group (sig):
"""Sends a signal to all processes of our process group (w/o ourselves).
@param sig: signal number to send
@type sig: int"""
def handler (sig, stack):
"""Ignores the signal exactly one time and then restores the default."""
signal.signal(sig, signal.SIG_DFL)
signal.signal(sig, handler)
pgid = os.getpgrp()
os.killpg(pgid, sig)
def get_runsystem ():
# check for sabayon first, as sabayon also has the gentoo release
for sp in ("/etc/sabayon-release", "/etc/sabayon-edition"):
if os.path.exists(sp):
with open(sp) as r:
return ("Sabayon", r.readline().strip())
if os.path.exists("/etc/gentoo-release"):
return ("Gentoo", "")
else: return ("Unknown", "")
def paren_reduce(mystr):
"""
Take a string and convert all paren enclosed entities into sublists, optionally
futher splitting the list elements by spaces.
This function is copied from portage.
Example usage:
>>> paren_reduce('foobar foo ( bar baz )')
['foobar', 'foo', ['bar', 'baz']]
@param mystr: The string to reduce
@type mystr: String
@rtype: Array
@return: The reduced string in an array
"""
mylist = []
while mystr:
left_paren = mystr.find("(")
has_left_paren = left_paren != -1
right_paren = mystr.find(")")
has_right_paren = right_paren != -1
if not has_left_paren and not has_right_paren:
freesec = mystr
subsec = None
tail = ""
elif mystr[0] == ")":
return [mylist,mystr[1:]]
elif has_left_paren and not has_right_paren:
error(_("Invalid dependency string"))
return []
elif has_left_paren and left_paren < right_paren:
freesec,subsec = mystr.split("(",1)
subsec,tail = paren_reduce(subsec)
else:
subsec,tail = mystr.split(")",1)
subsec = filter(None, subsec.split(" "))
return [mylist+subsec,tail]
mystr = tail
if freesec:
mylist = mylist + filter(None, freesec.split(" "))
if subsec is not None:
mylist = mylist + [subsec]
return mylist
def flatten (listOfLists):
"""Flattens the given list of lists.
@param listOfLists: the list of lists to flatten
@type listOfLists: list of lists
@returns: flattend list
@rtype: list"""
if not isinstance(listOfLists, list):
return [listOfLists]
ret = []
for r in listOfLists:
ret.extend(flatten(r))
return ret
def unique_array(s):
"""Stolen from portage_utils:
lifted from python cookbook, credit: Tim Peters
Return a list of the elements in s in arbitrary order, sans duplicates"""
# assume all elements are hashable, if so, it's linear
try:
return list(set(s))
except TypeError:
pass
# so much for linear. abuse sort.
try:
t = list(s)
t.sort()
except TypeError:
pass
else:
n = len(s)
assert n > 0
last = t[0]
lasti = i = 1
while i < n:
if t[i] != last:
t[lasti] = last = t[i]
lasti += 1
i += 1
return t[:lasti]
# blah. back to original portage.unique_array
u = []
for x in s:
if x not in u:
u.append(x)
return u
def detect_desktop_environment():
# stolen from wicd :)
desktop_environment = 'generic'
if os.environ.get('KDE_FULL_SESSION') == 'true':
desktop_environment = 'kde'
elif os.environ.get('GNOME_DESKTOP_SESSION_ID'):
desktop_environment = 'gnome'
#else: # no need for this part as of now
# try:
# info = commands.getoutput('xprop -root _DT_SAVE_MODE')
# if ' = "xfce4"' in info:
# desktop_environment = 'xfce'
# except (OSError, RuntimeError):
# pass
return desktop_environment
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