736 lines
20 KiB
Python
736 lines
20 KiB
Python
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# Copyright (C) 2003-2007 Swedish Institute of Computer Science.
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#
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# Please refer to the file named LICENSE in the same directory as this
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# file for licensing information.
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#
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# $Id: utils.py,v 1.1 2007/08/21 14:41:01 fros4943 Exp $
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import errno
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import math
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import operator
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import os
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import popen2
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import re
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import string
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import shutil
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import sys
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import tempfile
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import threading
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import traceback
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import types
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import chakana.command
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import chakana.error
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from chakana.debug import *
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try:
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global False
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global True
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_ = False
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except NameError:
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False = 0
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True = 1
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class DefaultDict(dict):
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def __init__(self, defaultCreator, initialiser = (), inject = 0):
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dict.__init__(self, initialiser)
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if callable(defaultCreator):
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self._defaultCreator = defaultCreator
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else:
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self._defaultCreator = lambda k: defaultCreator
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self._inject = inject
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def __getitem__(self, key):
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try:
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return dict.__getitem__(self, key)
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except KeyError, err:
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value = self._defaultCreator(key)
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if self._inject:
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self[key] = value
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return self[key]
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else:
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return value
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class UnbufferedFile:
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def __init__(self, fileObj):
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self._fileObj = fileObj
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def __getattr__(self, attribute):
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return getattr(self._fileObj, attribute)
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def write(self, what):
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self._fileObj.write(what)
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self._fileObj.flush()
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def copyFile(src, dest):
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debug(Event, "cp " + src + " " + dest)
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srcFile = file(src)
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destFile = file(dest, "w")
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destFile.write(srcFile.read())
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srcFile.close()
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destFile.close()
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def unique(list):
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ret = []
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inList = {}
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for elem in list:
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if not elem in inList:
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ret.append(elem)
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inList[elem] = 1
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return ret
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def unorderedEqual(listOne, listTwo, predicate = lambda x, y: x == y):
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if len(listOne) != len(listTwo):
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return 0
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list1 = list(listOne)
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list2 = list(listTwo)
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while list1 != []:
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found = 0
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for index in range(len(list2)):
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if predicate(list1[0], list2[index]):
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del list1[0]
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del list2[index]
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found = 1
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break
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if not found:
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return 0
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return 1
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def reduceSequences(tupleSeq, oper = operator.add):
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"""Return a list, where the item at position i is the reduced value
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of all items at position i."""
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if len(tupleSeq) == 0:
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return []
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return [reduce(oper, [s[i] for s in tupleSeq])
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for i in range(len(tupleSeq[0]))]
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def listRemove(theList, predicate):
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"""Remove all items that match predicate in theList."""
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if not callable(predicate):
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return listRemove(theList, lambda x: x == predicate)
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else:
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index = 0
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while index < len(theList):
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if predicate(theList[index]):
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del theList[index]
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else:
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index += 1
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return theList
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def logn(n, x):
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return math.log(x) / math.log(n)
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def longRange(* args):
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"""As range, but works with long integers."""
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if len(args) == 1:
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start = 0L
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stop = args[0]
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step = 1L
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elif len(args) == 2:
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(start, stop) = args
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step = 1L
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else:
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(start, stop, step) = args
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if step == 0:
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raise ValueError("longRange() arg 3 must not be zero")
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ret = []
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while cmp(start, stop) == cmp(0, step):
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ret.append(start)
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start += step
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return ret
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integerSuffixes = ("", "K", "M", "G", "T")
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def abbreviateInteger(i, factor = 1024, minimise = 0):
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suf = 0
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while suf < len(integerSuffixes) - 1 and \
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((i > 9999) or (minimise and (i != 0) and (i % factor == 0))):
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suf += 1
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i /= factor
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return str(i) + integerSuffixes[suf]
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def readSuffixedInt(intString, factor = 1024):
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if intString[-1].isalpha():
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return int(intString[: -1]) * (
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factor ** list(integerSuffixes).index(intString[-1].upper()))
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else:
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return int(intString)
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def normaliseIndex(index, seq):
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"""Return a non-negative index relating to a sequence, or negative if
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index < - len(seq)."""
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if index < 0:
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return len(seq) + index
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else:
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return index
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def truncateIndex(index, seq):
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"""Return a non-negative index relating to a sequence, less than or equal
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to the length of the sequence."""
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ret = normaliseIndex(index, seq)
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if ret < 0:
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return 0
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length = len(seq)
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if ret > length:
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return length
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return ret
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class LazySlice:
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"""Representation of slice into other sequence."""
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def __init__(self, seq, start = None, stop = None, step = None):
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self._sequence = seq
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if step is None:
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self._step = 1
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else:
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self._step = step
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if self._step == 0:
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# Provoke ValueError
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[][0:1:0]
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if self._step > 0:
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startDefault = 0
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stopDefault = len(seq)
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indexShift = 0
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else:
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startDefault = len(seq) - 1
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stopDefault = -1
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indexShift = 1
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if start is None:
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self._start = startDefault
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else:
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self._start = truncateIndex(start + indexShift, seq) - indexShift
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if stop is None:
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self._stop = stopDefault
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else:
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self._stop = truncateIndex(stop + indexShift, seq) - indexShift
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if (self._step > 0) != (self._start < self._stop):
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self._stop = self._start
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def __getitem__(self, key):
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# debug(Debug2, "LS getitem " + str(key) + ": " + repr(self))
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if type(key) == types.SliceType:
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ret = LazySlice(self, key.start, key.stop, key.step)
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#debug(Debug2, "LS getitem " + str(key) + " = " +
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# repr(ret) + ", LS: " + repr(self))
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return ret
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index = normaliseIndex(key, self)
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if index < 0:
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# Provoke IndexError
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[][1]
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seqIndex = self._start + index * self._step
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if self._step > 0:
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if seqIndex >= self._stop:
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[][1]
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elif seqIndex <= self._stop:
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[][1]
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ret = self._sequence[seqIndex]
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#debug(Debug2, "LS getitem " + str(key) + " (" + str(seqIndex) + ") = " +
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# str(ret) + ", LS: " + repr(self))
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return ret
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def __len__(self):
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return (abs(self._stop - self._start) + abs(self._step) - 1) / \
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abs(self._step)
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def __str__(self):
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return str(list(self))
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def __repr__(self):
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return "LazySlice(start = " + str(self._start) + ", stop = " + \
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str(self._stop) + ", step = " + str(self._step) + ",\n " + \
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repr(self._sequence) + ")"
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def getItem(sequence, key):
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"""Obtain key in sequence. Key may be an integer or a slice object."""
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if type(key) == types.SliceType:
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if key.step is None:
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return sequence[key.start : key.stop]
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return sequence[key.start : key.stop : key.step]
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return sequence[key]
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def binarySearch(list, value, start = 0, end = None):
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"Return the position where value should be inserted in a sorted list."
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if end is None:
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end = len(list)
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if start == end:
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return end
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middle = start + (end - start) / 2
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if list[middle] < value:
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return binarySearch(list, value, middle + 1, end)
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else:
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return binarySearch(list, value, start, middle)
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def binaryFind(list, value, *args, ** kwArgs):
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"Return position of value in sorted list, or None if not found."
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position = binarySearch(list, value, *args, ** kwArgs)
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if (position == len(list)) or (list[position] != value):
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return None
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else:
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return position
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def compactIntListRepr(input, sort = 0):
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if sort:
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list = input[:]
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list.sort()
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else:
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list = input
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if __debug__:
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tmp = list[:]
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tmp.sort()
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assert(tmp == list)
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index = 0
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ret = "["
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sep = ""
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compact = lambda l, i: (i + 1 < len(l)) and (l[i] + 1 == l[i + 1])
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while index < len(list):
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ret += sep + str(list[index])
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if compact(list, index):
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ret += "-"
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while compact(list, index):
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index += 1
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ret += str(list[index])
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index += 1
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sep = ","
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return ret + "]"
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def predicatedIndex(sequence, predicate):
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for i in range(len(sequence)):
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if predicate(sequence[i]):
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return i
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raise ValueError()
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class ArgumentBinder:
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def __init__(self, function, argument, position = 0):
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self.__function = function
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self.__argument = argument
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self.__position = position
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def __call__(self, *args, **keywords):
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newArgs = list(args)
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newArgs[self.__position : self.__position] = [self.__argument]
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return self.__function(*newArgs, **keywords)
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class ArgumentTupleBinder:
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def __init__(self, function, arguments):
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self._function = function
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self._arguments = arguments
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def __call__(self, * args, ** kwArgs):
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return self._function(* (self._arguments + args), ** kwArgs)
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class KeywordArgumentBinder:
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def __init__(self, function, ** keywords):
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self._function = function
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self._keywords = keywords
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def __call__(self, * args, ** kwArgs):
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kw = self._keywords
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kw.update(kwArgs)
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return self._function(* args, ** kw)
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cppKeywords = ["asm", "do", "inline", "short", "typeid", "auto",
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"double", "int", "signed", "typename", "bool",
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"dynamic_cast", "long", "sizeof", "union", "break",
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"else", "mutable", "static", "unsigned", "case",
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"enum", "namespace", "static_cast", "using", "catch",
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"explicit", "new", "struct", "virtual", "char",
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"extern", "operator", "switch", "void", "class",
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"false", "private", "template", "volatile", "const",
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"float", "protected", "this", "wchar_t", "const_cast",
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"for", "public", "throw", "while", "continue",
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"friend", "register", "true", "default", "goto",
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"reinterpret_cast", "try", "delete", "if", "return",
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"typedef"]
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def isCWord(str):
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return not re.match("^[a-zA-Z_][a-zA-Z0-9_]*$", str) is None
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def isCppIdentifier(str):
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return isCWord(str) and (str not in cppKeywords)
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def find(seq, predicate = lambda x: x):
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for item in seq:
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if predicate(item):
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return item
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return None
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def allBest(seq, comparator = cmp):
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if len(seq) < 2:
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return seq
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seq = seq[:]
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ret = [seq.pop()]
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for item in seq:
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c = comparator(item, ret[0])
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if c < 0:
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ret = [item]
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elif c == 0:
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ret.append(item)
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return ret
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def readFile(fileName):
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f = open(fileName)
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try:
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ret = f.read()
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return ret
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finally:
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f.close()
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def writeFile(fileName, contents):
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f = open(fileName, "w")
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try:
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f.write(contents)
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finally:
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f.close()
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def writeFileAtomic(fileName, contents, suffix = ".tmp"):
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tmpFile = fileName + suffix
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writeFile(tmpFile, contents)
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try:
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os.rename(tmpFile, fileName)
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except:
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if os.path.exists(fileName) and os.path.exists(tmpFile):
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os.remove(tmpFile)
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raise
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class LineIndexed:
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"""Read-only file object indexed by line number. The file object must
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support seeking."""
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def __init__(self, fileName, offset = 0):
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if type(fileName) == type(""):
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self._file = file(fileName)
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else:
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self._file = fileName
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self._offset = offset
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self._length = None
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self._lineOffsets = [0]
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def close(self):
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self._file.close()
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def __del__(self):
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self.close()
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def _seekForward(self, index):
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if self._length == 0:
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raise IndexError()
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for index in range(len(self._lineOffsets), index + 1):
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if self._lineOffsets[-1] == self._length:
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raise IndexError()
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self._file.seek(self._lineOffsets[-1] + self._offset)
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line = self._file.readline()
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if line == "":
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self._length = self._lineOffsets[-1]
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else:
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self._lineOffsets.append(self._lineOffsets[-1] + len(line))
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def __getitem__(self, key):
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if type(key) == types.SliceType:
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ret = LazySlice(self, key.start, key.stop, key.step)
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return ret
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if key < 0:
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positiveLength = len(self) + key
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if positiveLength < 0:
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raise IndexError()
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return self[positiveLength]
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self._seekForward(key)
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offset = self._lineOffsets[key]
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if offset == self._length:
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raise IndexError()
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self._file.seek(offset + self._offset)
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return self._file.readline()
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def __len__(self):
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if self._length == 0:
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return 0
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while self._lineOffsets[-1] != self._length:
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self._seekForward(len(self._lineOffsets))
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return len(self._lineOffsets) - 1
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def lineOffset(self, index):
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self._seekForward(index)
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return self._lineOffsets[index]
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def __str__(self):
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return str(list(self))
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|
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def __repr__(self):
|
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return "LineIndexed(offset = " + str(self._offset) + ", length = " + \
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str(self._length) + ", lineOffsets: " + \
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str(self._lineOffsets) + ")"
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|
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def getLine(fileName, count):
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fileObj = file(fileName)
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if count < 0:
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return fileObj.readlines()[count]
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for i in range(count + 1):
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ret = fileObj.readline()
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if ret == "":
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raise IndexError()
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return ret
|
|
|
|
def conditionalJoin(list, separator = " ", predicate = lambda e: e != ""):
|
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if len(list) == 0:
|
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return ""
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rest = conditionalJoin(list[1:], separator, predicate)
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if not predicate(rest):
|
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return list[0]
|
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if not predicate(list[0]):
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return rest
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else:
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return list[0] + separator + rest
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|
|
def pathComponents(path):
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(head, tail) = os.path.split(path)
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if tail == "":
|
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if head == "":
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return []
|
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if head == "/":
|
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return ["/"]
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else:
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return pathComponents(head)
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else:
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return pathComponents(head) + [tail]
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|
|
def commonFirstElements(listOfLists):
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if len(listOfLists) == 0:
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return []
|
|
if len(listOfLists) == 1:
|
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return listOfLists[0]
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|
if (len(listOfLists[0]) == 0) or (len(listOfLists[1]) == 0) or \
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(listOfLists[0][0] != listOfLists[1][0]):
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return []
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else:
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return commonFirstElements([
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[listOfLists[0][0]] +
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commonFirstElements([listOfLists[0][1:], listOfLists[1][1:]])]
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+ listOfLists[2:])
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|
|
def commonPrefix(pathList):
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|
"""Similar to os.path.commonprefix, but works on path components instead
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of individual characters."""
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assert(not isinstance(pathList, str))
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components = commonFirstElements(map(pathComponents, pathList))
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if components == []:
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return ""
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else:
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return os.path.join(* components)
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|
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def pathIsBelow(path, directory):
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"""Check if path lies below directory."""
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|
return commonPrefix([path, directory]) == directory
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|
|
def realPath(path):
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|
"""Similar to os.path.realpath, but handles amd gracefully."""
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|
ret = os.path.realpath(path)
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|
for binDir in os.environ["PATH"].split(":") + ["/usr/sbin", "/sbin"]:
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|
amq = os.path.join(binDir, "amq")
|
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if os.path.isfile(amq):
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|
try:
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|
output = chakana.command.output(amq)
|
|
except chakana.error.CommandFailed, err:
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|
debug(Debug, str(err))
|
|
# Assume amd is not running
|
|
return ret
|
|
for line in output.splitlines():
|
|
amdDir = line.split()[0]
|
|
mountDir = line.split()[-1]
|
|
if mountDir[0] == "/":
|
|
match = re.match('^(' + re.escape(line) + ')(/$)', ret)
|
|
if match:
|
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return amdDir + ret[len(line) :]
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|
return ret
|
|
return ret
|
|
|
|
def removeTree(path, ignoreErrors = False):
|
|
debug(Debug, "rm -rf " + path)
|
|
if os.path.isdir(path):
|
|
shutil.rmtree(path, ignore_errors = ignoreErrors)
|
|
|
|
def makeSymlink(value, dest, force = True, debugLevel = MinorEvent,
|
|
dryRun = False):
|
|
if os.path.islink(dest):
|
|
if os.readlink(dest) == value:
|
|
debug(Debug, "Link " + dest + " already points to " + value)
|
|
return
|
|
elif force:
|
|
debug(debugLevel, "Removing " + dest)
|
|
if not dryRun:
|
|
os.remove(dest)
|
|
else:
|
|
raise OSError((errno.EEXIST, "Link already exists", dest))
|
|
absValue = os.path.join(os.path.dirname(dest), value)
|
|
if (not dryRun) and (not force) and (not os.path.isfile(absValue)):
|
|
raise OSError((errno.ENOENT, "Link destination does not exist", absDest))
|
|
debug(debugLevel, "Linking " + dest + " to " + value)
|
|
if not dryRun:
|
|
os.symlink(value, dest)
|
|
|
|
def copyTree(src, dst, symlinks = False, predicate = lambda path: 1,
|
|
preserveTimes = False):
|
|
"""Similar to shutil.copytree, but allows existing destination and
|
|
passes exceptions."""
|
|
names = filter(predicate, os.listdir(src))
|
|
if not os.path.isdir(dst):
|
|
os.mkdir(dst)
|
|
for name in names:
|
|
srcname = os.path.join(src, name)
|
|
dstname = os.path.join(dst, name)
|
|
try:
|
|
if symlinks and os.path.islink(srcname):
|
|
linkto = os.readlink(srcname)
|
|
os.symlink(linkto, dstname)
|
|
elif os.path.isdir(srcname):
|
|
copyTree(srcname, dstname, symlinks, predicate, preserveTimes)
|
|
else:
|
|
if preserveTimes:
|
|
shutil.copy2(srcname, dstname)
|
|
else:
|
|
shutil.copy(srcname, dstname)
|
|
# XXX What about devices, sockets etc.?
|
|
except (IOError, os.error), why:
|
|
debug(Error, "Can't copy %s to %s: %s" %
|
|
(`srcname`, `dstname`, str(why)))
|
|
raise
|
|
|
|
def makeDirsSafe(dir, mode = 0777):
|
|
"""Similar to os.makedirs, but does not fail if another process is making
|
|
the directory simultaneously."""
|
|
while not os.path.isdir(dir):
|
|
try:
|
|
os.makedirs(dir, mode)
|
|
except OSError, err:
|
|
if err.errno != errno.EEXIST:
|
|
raise
|
|
|
|
def typeAssert(variable, type):
|
|
assert(isinstance(variable, type))
|
|
|
|
def intervalsOverlap(range1, range2):
|
|
if range1 > range2:
|
|
return intervalsOverlap(range2, range1)
|
|
if (range1[0] == range1[1]) or (range2[0] == range2[1]):
|
|
return 0
|
|
return range2[0] < range1[1]
|
|
|
|
class LexicalDistance:
|
|
def __init__(self, caseChange = 1, whiteSpaceChange = 2,
|
|
whiteSpaceRemoval = 3, ampersand = 5, other = 10,
|
|
whiteSpace = " _-'\""):
|
|
self.__caseChange = caseChange
|
|
self.__whiteSpaceChange = whiteSpaceChange
|
|
self.__whiteSpaceRemoval = whiteSpaceRemoval
|
|
self.__ampersand = ampersand
|
|
self.__other = other
|
|
self.__whiteSpace = whiteSpace
|
|
|
|
def removeWhiteSpace(self, str1, str2, limit):
|
|
if str1[0] in self.__whiteSpace:
|
|
if limit > self.__whiteSpaceRemoval:
|
|
return self(str1[1:], str2, limit - self.__whiteSpaceRemoval) + \
|
|
self.__whiteSpaceRemoval
|
|
return limit
|
|
|
|
def changeWhiteSpace(self, str1, str2, limit):
|
|
if (str1[0] in self.__whiteSpace) and (str2[0] in self.__whiteSpace):
|
|
if limit > self.__whiteSpaceChange:
|
|
return self(str1[1:], str2[1:], limit - self.__whiteSpaceChange) + \
|
|
self.__whiteSpaceChange
|
|
return limit
|
|
|
|
def changeCase(self, str1, str2, limit):
|
|
if str1[0].upper() == str2[0].upper():
|
|
if limit > self.__caseChange:
|
|
return self(str1[1:], str2[1:], limit - self.__caseChange) + \
|
|
self.__caseChange
|
|
return limit
|
|
|
|
def changeAmpersand(self, str1, str2, limit):
|
|
if (str1[0] == "&") and (str2[:3].lower() == "and"):
|
|
if limit > self.__ampersand:
|
|
return self(str1[1:], str2[3:], limit - self.__ampersand) + \
|
|
self.__ampersand
|
|
return limit
|
|
|
|
def removeOther(self, str1, str2, limit):
|
|
if limit > self.__other:
|
|
return self(str1[1:], str2, limit - self.__other) + self.__other
|
|
return limit
|
|
|
|
def changeOther(self, str1, str2, limit):
|
|
if limit > self.__other:
|
|
return self(str1[1:], str2[1:], limit - self.__other) + self.__other
|
|
return limit
|
|
|
|
def __call__(self, str1, str2, limit = 50):
|
|
ret = limit
|
|
if str1 == "":
|
|
if str2 == "":
|
|
return 0
|
|
ret = self.removeWhiteSpace(str2, str1, ret)
|
|
ret = self.removeOther(str2, str1, ret)
|
|
elif str2 == "":
|
|
ret = self(str2, str1, ret)
|
|
else:
|
|
if str1[0] == str2[0]:
|
|
ret = self(str1[1:], str2[1:], ret)
|
|
else:
|
|
ret = self.removeWhiteSpace(str1, str2, ret)
|
|
ret = self.removeWhiteSpace(str2, str1, ret)
|
|
ret = self.changeWhiteSpace(str1, str2, ret)
|
|
ret = self.changeCase(str1, str2, ret)
|
|
ret = self.changeAmpersand(str1, str2, ret)
|
|
ret = self.changeAmpersand(str2, str1, ret)
|
|
ret = self.changeOther(str1, str2, ret)
|
|
ret = self.removeOther(str1, str2, ret)
|
|
ret = self.removeOther(str2, str1, ret)
|
|
assert(ret <= limit)
|
|
return ret
|
|
|
|
class TryOperation:
|
|
def __init__(self, operation, description = None):
|
|
self.__operation = operation
|
|
if description is None:
|
|
self.__description = str(operation)
|
|
else:
|
|
self.__description = description
|
|
|
|
def __call__(self, * args, ** kwargs):
|
|
try:
|
|
self.__operation(* args, ** kwargs)
|
|
except KeyboardInterrupt:
|
|
raise
|
|
except:
|
|
import debug as d
|
|
d.debug(d.Error, self.__description + " failed\n" +
|
|
d.exceptionDump(sys.exc_info()))
|
|
|
|
def lineDirective():
|
|
fileInfo = traceback.extract_stack(None, 2)[0]
|
|
return "#line " + repr(fileInfo[1] + 1) + " \"" + fileInfo[0] + "\""
|
|
|
|
try:
|
|
mkstemp = tempfile.mkstemp
|
|
except AttributeError:
|
|
def mkstemp(suffix = "", prefix = None, dir = None, text = 0):
|
|
if prefix is None:
|
|
prefix = tempfile.gettempprefix()
|
|
fileName = tempfile.mktemp(suffix)
|
|
if dir is None:
|
|
dir = os.path.dirname(fileName)
|
|
newFileName = os.path.join(dir, prefix + os.path.basename(fileName))
|
|
if text:
|
|
flags = "w"
|
|
else:
|
|
flags = "wb"
|
|
return (file(newFileName, flags), newFileName)
|
|
|