Mercurial > repos > bcclaywell > argo_navis

annotate venv/lib/python2.7/ntpath.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 # Module 'ntpath' -- common operations on WinNT/Win95 pathnames
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2 """Common pathname manipulations, WindowsNT/95 version.
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3
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4 Instead of importing this module directly, import os and refer to this
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5 module as os.path.
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6 """
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7
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8 import os
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9 import sys
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10 import stat
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11 import genericpath
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12 import warnings
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13
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14 from genericpath import *
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15 from genericpath import _unicode
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16
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17 __all__ = ["normcase","isabs","join","splitdrive","split","splitext",
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18 "basename","dirname","commonprefix","getsize","getmtime",
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19 "getatime","getctime", "islink","exists","lexists","isdir","isfile",
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20 "ismount","walk","expanduser","expandvars","normpath","abspath",
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21 "splitunc","curdir","pardir","sep","pathsep","defpath","altsep",
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22 "extsep","devnull","realpath","supports_unicode_filenames","relpath"]
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23
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24 # strings representing various path-related bits and pieces
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25 curdir = '.'
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26 pardir = '..'
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27 extsep = '.'
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28 sep = '\\'
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29 pathsep = ';'
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30 altsep = '/'
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31 defpath = '.;C:\\bin'
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32 if 'ce' in sys.builtin_module_names:
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33 defpath = '\\Windows'
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34 elif 'os2' in sys.builtin_module_names:
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35 # OS/2 w/ VACPP
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36 altsep = '/'
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37 devnull = 'nul'
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38
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39 # Normalize the case of a pathname and map slashes to backslashes.
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40 # Other normalizations (such as optimizing '../' away) are not done
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41 # (this is done by normpath).
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42
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43 def normcase(s):
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44 """Normalize case of pathname.
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45
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46 Makes all characters lowercase and all slashes into backslashes."""
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47 return s.replace("/", "\\").lower()
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48
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49
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50 # Return whether a path is absolute.
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51 # Trivial in Posix, harder on the Mac or MS-DOS.
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52 # For DOS it is absolute if it starts with a slash or backslash (current
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53 # volume), or if a pathname after the volume letter and colon / UNC resource
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54 # starts with a slash or backslash.
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55
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56 def isabs(s):
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57 """Test whether a path is absolute"""
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58 s = splitdrive(s)[1]
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59 return s != '' and s[:1] in '/\\'
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60
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61
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62 # Join two (or more) paths.
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63 def join(path, *paths):
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64 """Join two or more pathname components, inserting "\\" as needed."""
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65 result_drive, result_path = splitdrive(path)
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66 for p in paths:
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67 p_drive, p_path = splitdrive(p)
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68 if p_path and p_path[0] in '\\/':
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69 # Second path is absolute
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70 if p_drive or not result_drive:
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71 result_drive = p_drive
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72 result_path = p_path
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73 continue
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74 elif p_drive and p_drive != result_drive:
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75 if p_drive.lower() != result_drive.lower():
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76 # Different drives => ignore the first path entirely
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77 result_drive = p_drive
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78 result_path = p_path
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79 continue
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80 # Same drive in different case
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81 result_drive = p_drive
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82 # Second path is relative to the first
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83 if result_path and result_path[-1] not in '\\/':
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84 result_path = result_path + '\\'
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85 result_path = result_path + p_path
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86 ## add separator between UNC and non-absolute path
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87 if (result_path and result_path[0] not in '\\/' and
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88 result_drive and result_drive[-1:] != ':'):
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89 return result_drive + sep + result_path
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90 return result_drive + result_path
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91
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92
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93 # Split a path in a drive specification (a drive letter followed by a
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94 # colon) and the path specification.
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95 # It is always true that drivespec + pathspec == p
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96 def splitdrive(p):
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97 """Split a pathname into drive/UNC sharepoint and relative path specifiers.
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98 Returns a 2-tuple (drive_or_unc, path); either part may be empty.
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99
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100 If you assign
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101 result = splitdrive(p)
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102 It is always true that:
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103 result[0] + result[1] == p
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104
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105 If the path contained a drive letter, drive_or_unc will contain everything
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106 up to and including the colon. e.g. splitdrive("c:/dir") returns ("c:", "/dir")
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107
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108 If the path contained a UNC path, the drive_or_unc will contain the host name
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109 and share up to but not including the fourth directory separator character.
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110 e.g. splitdrive("//host/computer/dir") returns ("//host/computer", "/dir")
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111
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112 Paths cannot contain both a drive letter and a UNC path.
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113
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114 """
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115 if len(p) > 1:
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116 normp = p.replace(altsep, sep)
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117 if (normp[0:2] == sep*2) and (normp[2:3] != sep):
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118 # is a UNC path:
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119 # vvvvvvvvvvvvvvvvvvvv drive letter or UNC path
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120 # \\machine\mountpoint\directory\etc\...
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121 # directory ^^^^^^^^^^^^^^^
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122 index = normp.find(sep, 2)
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123 if index == -1:
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124 return '', p
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125 index2 = normp.find(sep, index + 1)
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126 # a UNC path can't have two slashes in a row
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127 # (after the initial two)
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128 if index2 == index + 1:
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129 return '', p
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130 if index2 == -1:
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131 index2 = len(p)
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132 return p[:index2], p[index2:]
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133 if normp[1] == ':':
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134 return p[:2], p[2:]
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135 return '', p
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136
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137 # Parse UNC paths
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138 def splitunc(p):
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139 """Split a pathname into UNC mount point and relative path specifiers.
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140
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141 Return a 2-tuple (unc, rest); either part may be empty.
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142 If unc is not empty, it has the form '//host/mount' (or similar
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143 using backslashes). unc+rest is always the input path.
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144 Paths containing drive letters never have an UNC part.
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145 """
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146 if p[1:2] == ':':
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147 return '', p # Drive letter present
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148 firstTwo = p[0:2]
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149 if firstTwo == '//' or firstTwo == '\\\\':
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150 # is a UNC path:
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151 # vvvvvvvvvvvvvvvvvvvv equivalent to drive letter
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152 # \\machine\mountpoint\directories...
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153 # directory ^^^^^^^^^^^^^^^
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154 normp = p.replace('\\', '/')
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155 index = normp.find('/', 2)
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156 if index <= 2:
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157 return '', p
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158 index2 = normp.find('/', index + 1)
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159 # a UNC path can't have two slashes in a row
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160 # (after the initial two)
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161 if index2 == index + 1:
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162 return '', p
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163 if index2 == -1:
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164 index2 = len(p)
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165 return p[:index2], p[index2:]
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166 return '', p
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167
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168
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169 # Split a path in head (everything up to the last '/') and tail (the
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170 # rest). After the trailing '/' is stripped, the invariant
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171 # join(head, tail) == p holds.
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172 # The resulting head won't end in '/' unless it is the root.
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173
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174 def split(p):
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175 """Split a pathname.
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176
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177 Return tuple (head, tail) where tail is everything after the final slash.
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178 Either part may be empty."""
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179
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180 d, p = splitdrive(p)
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181 # set i to index beyond p's last slash
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182 i = len(p)
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183 while i and p[i-1] not in '/\\':
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184 i = i - 1
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185 head, tail = p[:i], p[i:] # now tail has no slashes
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186 # remove trailing slashes from head, unless it's all slashes
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187 head2 = head
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188 while head2 and head2[-1] in '/\\':
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189 head2 = head2[:-1]
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190 head = head2 or head
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191 return d + head, tail
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192
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193
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194 # Split a path in root and extension.
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195 # The extension is everything starting at the last dot in the last
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196 # pathname component; the root is everything before that.
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197 # It is always true that root + ext == p.
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198
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199 def splitext(p):
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200 return genericpath._splitext(p, sep, altsep, extsep)
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201 splitext.__doc__ = genericpath._splitext.__doc__
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202
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203
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204 # Return the tail (basename) part of a path.
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205
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206 def basename(p):
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207 """Returns the final component of a pathname"""
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208 return split(p)[1]
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209
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210
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211 # Return the head (dirname) part of a path.
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212
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213 def dirname(p):
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214 """Returns the directory component of a pathname"""
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215 return split(p)[0]
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216
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217 # Is a path a symbolic link?
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218 # This will always return false on systems where posix.lstat doesn't exist.
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219
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220 def islink(path):
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221 """Test for symbolic link.
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222 On WindowsNT/95 and OS/2 always returns false
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223 """
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224 return False
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225
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226 # alias exists to lexists
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227 lexists = exists
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228
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229 # Is a path a mount point? Either a root (with or without drive letter)
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230 # or an UNC path with at most a / or \ after the mount point.
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231
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232 def ismount(path):
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233 """Test whether a path is a mount point (defined as root of drive)"""
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234 unc, rest = splitunc(path)
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235 if unc:
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236 return rest in ("", "/", "\\")
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237 p = splitdrive(path)[1]
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238 return len(p) == 1 and p[0] in '/\\'
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239
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240
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241 # Directory tree walk.
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242 # For each directory under top (including top itself, but excluding
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243 # '.' and '..'), func(arg, dirname, filenames) is called, where
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244 # dirname is the name of the directory and filenames is the list
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245 # of files (and subdirectories etc.) in the directory.
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246 # The func may modify the filenames list, to implement a filter,
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247 # or to impose a different order of visiting.
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248
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249 def walk(top, func, arg):
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250 """Directory tree walk with callback function.
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251
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252 For each directory in the directory tree rooted at top (including top
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253 itself, but excluding '.' and '..'), call func(arg, dirname, fnames).
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254 dirname is the name of the directory, and fnames a list of the names of
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255 the files and subdirectories in dirname (excluding '.' and '..'). func
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256 may modify the fnames list in-place (e.g. via del or slice assignment),
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257 and walk will only recurse into the subdirectories whose names remain in
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258 fnames; this can be used to implement a filter, or to impose a specific
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259 order of visiting. No semantics are defined for, or required of, arg,
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260 beyond that arg is always passed to func. It can be used, e.g., to pass
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261 a filename pattern, or a mutable object designed to accumulate
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262 statistics. Passing None for arg is common."""
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263 warnings.warnpy3k("In 3.x, os.path.walk is removed in favor of os.walk.",
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264 stacklevel=2)
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265 try:
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266 names = os.listdir(top)
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267 except os.error:
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268 return
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269 func(arg, top, names)
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270 for name in names:
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271 name = join(top, name)
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272 if isdir(name):
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273 walk(name, func, arg)
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274
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275
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276 # Expand paths beginning with '~' or '~user'.
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277 # '~' means $HOME; '~user' means that user's home directory.
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278 # If the path doesn't begin with '~', or if the user or $HOME is unknown,
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279 # the path is returned unchanged (leaving error reporting to whatever
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280 # function is called with the expanded path as argument).
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281 # See also module 'glob' for expansion of *, ? and [...] in pathnames.
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282 # (A function should also be defined to do full *sh-style environment
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283 # variable expansion.)
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284
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285 def expanduser(path):
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286 """Expand ~ and ~user constructs.
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287
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288 If user or $HOME is unknown, do nothing."""
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289 if path[:1] != '~':
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290 return path
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291 i, n = 1, len(path)
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292 while i < n and path[i] not in '/\\':
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293 i = i + 1
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294
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295 if 'HOME' in os.environ:
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296 userhome = os.environ['HOME']
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297 elif 'USERPROFILE' in os.environ:
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298 userhome = os.environ['USERPROFILE']
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299 elif not 'HOMEPATH' in os.environ:
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300 return path
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301 else:
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302 try:
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303 drive = os.environ['HOMEDRIVE']
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304 except KeyError:
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305 drive = ''
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306 userhome = join(drive, os.environ['HOMEPATH'])
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307
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308 if i != 1: #~user
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309 userhome = join(dirname(userhome), path[1:i])
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310
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311 return userhome + path[i:]
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312
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313
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314 # Expand paths containing shell variable substitutions.
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315 # The following rules apply:
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316 # - no expansion within single quotes
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317 # - '$$' is translated into '$'
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318 # - '%%' is translated into '%' if '%%' are not seen in %var1%%var2%
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319 # - ${varname} is accepted.
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320 # - $varname is accepted.
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321 # - %varname% is accepted.
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322 # - varnames can be made out of letters, digits and the characters '_-'
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323 # (though is not verified in the ${varname} and %varname% cases)
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324 # XXX With COMMAND.COM you can use any characters in a variable name,
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325 # XXX except '^|<>='.
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326
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327 def expandvars(path):
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328 """Expand shell variables of the forms $var, ${var} and %var%.
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329
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330 Unknown variables are left unchanged."""
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331 if '$' not in path and '%' not in path:
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332 return path
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333 import string
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334 varchars = string.ascii_letters + string.digits + '_-'
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335 if isinstance(path, _unicode):
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336 encoding = sys.getfilesystemencoding()
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337 def getenv(var):
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338 return os.environ[var.encode(encoding)].decode(encoding)
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339 else:
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340 def getenv(var):
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341 return os.environ[var]
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342 res = ''
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343 index = 0
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344 pathlen = len(path)
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345 while index < pathlen:
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346 c = path[index]
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347 if c == '\'': # no expansion within single quotes
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348 path = path[index + 1:]
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349 pathlen = len(path)
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350 try:
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351 index = path.index('\'')
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352 res = res + '\'' + path[:index + 1]
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353 except ValueError:
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354 res = res + c + path
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355 index = pathlen - 1
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356 elif c == '%': # variable or '%'
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357 if path[index + 1:index + 2] == '%':
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358 res = res + c
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359 index = index + 1
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360 else:
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361 path = path[index+1:]
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362 pathlen = len(path)
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363 try:
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364 index = path.index('%')
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365 except ValueError:
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366 res = res + '%' + path
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367 index = pathlen - 1
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368 else:
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369 var = path[:index]
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370 try:
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371 res = res + getenv(var)
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372 except KeyError:
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373 res = res + '%' + var + '%'
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374 elif c == '$': # variable or '$$'
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375 if path[index + 1:index + 2] == '$':
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376 res = res + c
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377 index = index + 1
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parents:
diff changeset
378 elif path[index + 1:index + 2] == '{':
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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379 path = path[index+2:]
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bcclaywell
parents:
diff changeset
380 pathlen = len(path)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
381 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
382 index = path.index('}')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
383 var = path[:index]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
384 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
385 res = res + getenv(var)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
386 except KeyError:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
387 res = res + '${' + var + '}'
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
388 except ValueError:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
389 res = res + '${' + path
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bcclaywell
parents:
diff changeset
390 index = pathlen - 1
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
391 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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392 var = ''
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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393 index = index + 1
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bcclaywell
parents:
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394 c = path[index:index + 1]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
395 while c != '' and c in varchars:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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396 var = var + c
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
397 index = index + 1
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bcclaywell
parents:
diff changeset
398 c = path[index:index + 1]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
399 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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400 res = res + getenv(var)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
401 except KeyError:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
402 res = res + '$' + var
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
403 if c != '':
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
404 index = index - 1
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
405 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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406 res = res + c
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
407 index = index + 1
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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408 return res
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
409
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
410
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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411 # Normalize a path, e.g. A//B, A/./B and A/foo/../B all become A\B.
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bcclaywell
parents:
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412 # Previously, this function also truncated pathnames to 8+3 format,
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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413 # but as this module is called "ntpath", that's obviously wrong!
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bcclaywell
parents:
diff changeset
414
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
415 def normpath(path):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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416 """Normalize path, eliminating double slashes, etc."""
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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417 # Preserve unicode (if path is unicode)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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418 backslash, dot = (u'\\', u'.') if isinstance(path, _unicode) else ('\\', '.')
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bcclaywell
parents:
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419 if path.startswith(('\\\\.\\', '\\\\?\\')):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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420 # in the case of paths with these prefixes:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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421 # \\.\ -> device names
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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422 # \\?\ -> literal paths
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
423 # do not do any normalization, but return the path unchanged
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
424 return path
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
425 path = path.replace("/", "\\")
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
426 prefix, path = splitdrive(path)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
427 # We need to be careful here. If the prefix is empty, and the path starts
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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428 # with a backslash, it could either be an absolute path on the current
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
429 # drive (\dir1\dir2\file) or a UNC filename (\\server\mount\dir1\file). It
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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430 # is therefore imperative NOT to collapse multiple backslashes blindly in
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
431 # that case.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
432 # The code below preserves multiple backslashes when there is no drive
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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433 # letter. This means that the invalid filename \\\a\b is preserved
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
434 # unchanged, where a\\\b is normalised to a\b. It's not clear that there
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
435 # is any better behaviour for such edge cases.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
436 if prefix == '':
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
437 # No drive letter - preserve initial backslashes
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
438 while path[:1] == "\\":
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
439 prefix = prefix + backslash
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
440 path = path[1:]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
441 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
442 # We have a drive letter - collapse initial backslashes
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
443 if path.startswith("\\"):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
444 prefix = prefix + backslash
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
445 path = path.lstrip("\\")
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
446 comps = path.split("\\")
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
447 i = 0
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
448 while i < len(comps):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
449 if comps[i] in ('.', ''):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
450 del comps[i]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
451 elif comps[i] == '..':
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
452 if i > 0 and comps[i-1] != '..':
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
453 del comps[i-1:i+1]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
454 i -= 1
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
455 elif i == 0 and prefix.endswith("\\"):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
456 del comps[i]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
457 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
458 i += 1
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
459 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
460 i += 1
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
461 # If the path is now empty, substitute '.'
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
462 if not prefix and not comps:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
463 comps.append(dot)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
464 return prefix + backslash.join(comps)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
465
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
466
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
467 # Return an absolute path.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
468 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
469 from nt import _getfullpathname
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
470
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
471 except ImportError: # not running on Windows - mock up something sensible
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
472 def abspath(path):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
473 """Return the absolute version of a path."""
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
474 if not isabs(path):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
475 if isinstance(path, _unicode):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
476 cwd = os.getcwdu()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
477 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
478 cwd = os.getcwd()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
479 path = join(cwd, path)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
480 return normpath(path)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
481
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
482 else: # use native Windows method on Windows
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
483 def abspath(path):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
484 """Return the absolute version of a path."""
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
485
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
486 if path: # Empty path must return current working directory.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
487 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
488 path = _getfullpathname(path)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
489 except WindowsError:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
490 pass # Bad path - return unchanged.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
491 elif isinstance(path, _unicode):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
492 path = os.getcwdu()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
493 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
494 path = os.getcwd()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
495 return normpath(path)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
496
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
497 # realpath is a no-op on systems without islink support
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
498 realpath = abspath
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
499 # Win9x family and earlier have no Unicode filename support.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
500 supports_unicode_filenames = (hasattr(sys, "getwindowsversion") and
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
501 sys.getwindowsversion()[3] >= 2)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
502
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
503 def _abspath_split(path):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
504 abs = abspath(normpath(path))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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505 prefix, rest = splitunc(abs)
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506 is_unc = bool(prefix)
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507 if not is_unc:
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508 prefix, rest = splitdrive(abs)
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509 return is_unc, prefix, [x for x in rest.split(sep) if x]
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510
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511 def relpath(path, start=curdir):
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512 """Return a relative version of a path"""
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513
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514 if not path:
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515 raise ValueError("no path specified")
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516
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517 start_is_unc, start_prefix, start_list = _abspath_split(start)
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518 path_is_unc, path_prefix, path_list = _abspath_split(path)
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519
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520 if path_is_unc ^ start_is_unc:
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521 raise ValueError("Cannot mix UNC and non-UNC paths (%s and %s)"
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522 % (path, start))
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523 if path_prefix.lower() != start_prefix.lower():
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bcclaywell
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524 if path_is_unc:
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525 raise ValueError("path is on UNC root %s, start on UNC root %s"
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bcclaywell
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526 % (path_prefix, start_prefix))
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bcclaywell
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527 else:
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528 raise ValueError("path is on drive %s, start on drive %s"
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bcclaywell
parents:
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529 % (path_prefix, start_prefix))
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bcclaywell
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530 # Work out how much of the filepath is shared by start and path.
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bcclaywell
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531 i = 0
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bcclaywell
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532 for e1, e2 in zip(start_list, path_list):
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bcclaywell
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533 if e1.lower() != e2.lower():
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bcclaywell
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534 break
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bcclaywell
parents:
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535 i += 1
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bcclaywell
parents:
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536
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bcclaywell
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537 rel_list = [pardir] * (len(start_list)-i) + path_list[i:]
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bcclaywell
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538 if not rel_list:
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bcclaywell
parents:
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539 return curdir
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bcclaywell
parents:
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540 return join(*rel_list)
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bcclaywell
parents:
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541
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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542 try:
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bcclaywell
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543 # The genericpath.isdir implementation uses os.stat and checks the mode
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bcclaywell
parents:
diff changeset
544 # attribute to tell whether or not the path is a directory.
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bcclaywell
parents:
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545 # This is overkill on Windows - just pass the path to GetFileAttributes
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546 # and check the attribute from there.
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bcclaywell
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547 from nt import _isdir as isdir
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548 except ImportError:
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bcclaywell
parents:
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549 # Use genericpath.isdir as imported above.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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550 pass