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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) 2006-2007 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.
@var DEBUG: Boolean controlling whether to printout debug messages.
@type DEBUG: boolean
"""
import traceback, os.path, sys, types
DEBUG = True
def set_debug (d):
"""Sets the global DEBUG variable. Do not set it by your own - always use this function.
@param d: True to enable debugging; False otherwise
@type d: boolean"""
global DEBUG
DEBUG = d
def debug(*args, **kwargs):
"""Prints a debug message including filename and lineno.
A variable number of positional arguments are allowed.
If debug(obj0, obj1, obj2) is called, the text part of the output
looks like the output from print obj0, obj1, obj2.
@keyword name: Use the given name instead the correct function name.
@keyword file: Output file to use.
@keyword minus: The value given is the amount of frames to ignore in the stack to return the correct function call.
This should be used if you are wrapping the debug call.
@keyword warn: Prints the message as a warning. Value of DEBUG is ignored.
@keyword error: Prints the message as an error. Value of DEBUG is ignored."""
if not DEBUG and not ("warn" in kwargs or "error" in kwargs): return
stack = traceback.extract_stack()
minus = -2
if "minus" in kwargs:
minus = minus - kwargs["minus"]
a, b, c, d = stack[minus]
a = os.path.basename(a)
out = []
for obj in args:
out.append(str(obj))
text = ' '.join(out)
if "name" in kwargs:
text = 'In %s (%s:%s): %s' % (kwargs["name"], a, b, text)
else:
text = 'In %s (%s:%s): %s' % (c, a, b, text)
outfile = sys.stdout
surround = "DEBUG"
if "warn" in kwargs:
outfile = sys.stderr
surround = "WARNING"
elif "error" in kwargs:
outfile = sys.stderr
surround = "ERROR"
text = ("***%s*** %s ***%s***" % (surround, text, surround))
if "file" in kwargs:
f = open(kwargs["file"], "a+")
f.write(text+"\n")
f.close()
else:
print >> outfile, text
def am_i_root ():
"""Returns True if the current user is root, False otherwise.
@rtype: boolean"""
from plugin import hook
@hook("am_i_root")
def __am_i_root():
if os.getuid() == 0:
return True
else:
return False
return __am_i_root()
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 type(listOfLists) != types.ListType:
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"""
n = len(s)
# 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:
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
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