Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/glob2/impl.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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0
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1 """Filename globbing utility."""
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2
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3 from __future__ import absolute_import
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4
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5 import sys
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6 import os
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7 import re
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8 from os.path import join
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9 from . import fnmatch
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10
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11 try:
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12 from itertools import imap
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13 except ImportError:
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14 imap = map
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15
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16
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17 class Globber(object):
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18
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19 listdir = staticmethod(os.listdir)
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20 isdir = staticmethod(os.path.isdir)
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21 islink = staticmethod(os.path.islink)
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22 exists = staticmethod(os.path.lexists)
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23
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24 def walk(self, top, followlinks=False, sep=None):
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25 """A simplified version of os.walk (code copied) that uses
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26 ``self.listdir``, and the other local filesystem methods.
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27
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28 Because we don't care about file/directory distinctions, only
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29 a single list is returned.
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30 """
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31 try:
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32 names = self.listdir(top)
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33 except os.error as err:
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34 return
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35
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36 items = []
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37 for name in names:
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38 items.append(name)
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39
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40 yield top, items
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41
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42 for name in items:
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43 new_path = _join_paths([top, name], sep=sep)
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44 if followlinks or not self.islink(new_path):
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45 for x in self.walk(new_path, followlinks):
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46 yield x
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47
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48 def glob(self, pathname, with_matches=False, include_hidden=False, recursive=True,
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49 norm_paths=True, case_sensitive=True, sep=None):
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50 """Return a list of paths matching a pathname pattern.
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51
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52 The pattern may contain simple shell-style wildcards a la
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53 fnmatch. However, unlike fnmatch, filenames starting with a
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54 dot are special cases that are not matched by '*' and '?'
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55 patterns.
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56
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57 If ``include_hidden`` is True, then files and folders starting with
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58 a dot are also returned.
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59 """
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60 return list(self.iglob(pathname, with_matches, include_hidden,
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61 norm_paths, case_sensitive, sep))
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62
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63 def iglob(self, pathname, with_matches=False, include_hidden=False, recursive=True,
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64 norm_paths=True, case_sensitive=True, sep=None):
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65 """Return an iterator which yields the paths matching a pathname
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66 pattern.
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67
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68 The pattern may contain simple shell-style wildcards a la
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69 fnmatch. However, unlike fnmatch, filenames starting with a
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70 dot are special cases that are not matched by '*' and '?'
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71 patterns.
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72
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73 If ``with_matches`` is True, then for each matching path
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74 a 2-tuple will be returned; the second element if the tuple
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75 will be a list of the parts of the path that matched the individual
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76 wildcards.
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77
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78 If ``include_hidden`` is True, then files and folders starting with
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79 a dot are also returned.
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80 """
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81 result = self._iglob(pathname, True, include_hidden,
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82 norm_paths, case_sensitive, sep)
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83 if with_matches:
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84 return result
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85 return imap(lambda s: s[0], result)
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86
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87 def _iglob(self, pathname, rootcall, include_hidden,
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88 norm_paths, case_sensitive, sep):
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89 """Internal implementation that backs :meth:`iglob`.
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90
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91 ``rootcall`` is required to differentiate between the user's call to
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92 iglob(), and subsequent recursive calls, for the purposes of resolving
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93 certain special cases of ** wildcards. Specifically, "**" is supposed
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94 to include the current directory for purposes of globbing, but the
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95 directory itself should never be returned. So if ** is the lastmost
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96 part of the ``pathname`` given the user to the root call, we want to
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97 ignore the current directory. For this, we need to know which the root
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98 call is.
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99 """
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100
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101 # Short-circuit if no glob magic
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102 if not has_magic(pathname):
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103 if self.exists(pathname):
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104 yield pathname, ()
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105 return
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106
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107 # If no directory part is left, assume the working directory
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108 dirname, basename = os.path.split(pathname)
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109
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110 # If the directory is globbed, recurse to resolve.
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111 # If at this point there is no directory part left, we simply
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112 # continue with dirname="", which will search the current dir.
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113 # `os.path.split()` returns the argument itself as a dirname if it is a
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114 # drive or UNC path. Prevent an infinite recursion if a drive or UNC path
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115 # contains magic characters (i.e. r'\\?\C:').
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116 if dirname != pathname and has_magic(dirname):
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117 # Note that this may return files, which will be ignored
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118 # later when we try to use them as directories.
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119 # Prefiltering them here would only require more IO ops.
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120 dirs = self._iglob(dirname, False, include_hidden,
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121 norm_paths, case_sensitive, sep)
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122 else:
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123 dirs = [(dirname, ())]
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124
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125 # Resolve ``basename`` expr for every directory found
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126 for dirname, dir_groups in dirs:
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127 for name, groups in self.resolve_pattern(dirname, basename,
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128 not rootcall, include_hidden,
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129 norm_paths, case_sensitive, sep):
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130 yield _join_paths([dirname, name], sep=sep), dir_groups + groups
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131
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132 def resolve_pattern(self, dirname, pattern, globstar_with_root, include_hidden,
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133 norm_paths, case_sensitive, sep):
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134 """Apply ``pattern`` (contains no path elements) to the
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135 literal directory in ``dirname``.
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136
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137 If pattern=='', this will filter for directories. This is
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138 a special case that happens when the user's glob expression ends
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139 with a slash (in which case we only want directories). It simpler
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140 and faster to filter here than in :meth:`_iglob`.
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141 """
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142
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143 if sys.version_info[0] == 3:
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144 if isinstance(pattern, bytes):
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145 dirname = bytes(os.curdir, 'ASCII')
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146 else:
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147 if isinstance(pattern, unicode) and not isinstance(dirname, unicode):
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148 dirname = unicode(dirname, sys.getfilesystemencoding() or
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149 sys.getdefaultencoding())
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150
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151 # If no magic, short-circuit, only check for existence
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152 if not has_magic(pattern):
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153 if pattern == '':
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154 if self.isdir(dirname):
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155 return [(pattern, ())]
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156 else:
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157 if self.exists(_join_paths([dirname, pattern], sep=sep)):
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158 return [(pattern, ())]
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159 return []
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160
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161 if not dirname:
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162 dirname = os.curdir
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163
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164 try:
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165 if pattern == '**':
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166 # Include the current directory in **, if asked; by adding
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167 # an empty string as opposed to '.', we spare ourselves
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168 # having to deal with os.path.normpath() later.
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169 names = [''] if globstar_with_root else []
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170 for top, entries in self.walk(dirname, sep=sep):
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171 _mkabs = lambda s: _join_paths([top[len(dirname) + 1:], s], sep=sep)
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172 names.extend(map(_mkabs, entries))
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173 # Reset pattern so that fnmatch(), which does not understand
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174 # ** specifically, will only return a single group match.
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175 pattern = '*'
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176 else:
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177 names = self.listdir(dirname)
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178 except os.error:
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179 return []
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180
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181 if not include_hidden and not _ishidden(pattern):
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182 # Remove hidden files, but take care to ensure
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183 # that the empty string we may have added earlier remains.
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184 # Do not filter out the '' that we might have added earlier
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185 names = filter(lambda x: not x or not _ishidden(x), names)
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186 return fnmatch.filter(names, pattern, norm_paths, case_sensitive, sep)
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187
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188
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189 default_globber = Globber()
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190 glob = default_globber.glob
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191 iglob = default_globber.iglob
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192 del default_globber
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193
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194
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195 magic_check = re.compile('[*?[]')
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196 magic_check_bytes = re.compile(b'[*?[]')
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197
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198
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199 def has_magic(s):
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200 if isinstance(s, bytes):
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201 match = magic_check_bytes.search(s)
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202 else:
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203 match = magic_check.search(s)
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204 return match is not None
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205
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206
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207 def _ishidden(path):
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208 return path[0] in ('.', b'.'[0])
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209
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210
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211 def _join_paths(paths, sep=None):
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212 path = join(*paths)
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213 if sep:
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214 path = re.sub(r'\/', sep, path) # cached internally
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215 return path
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216