Mercurial > cpython-lru_cache-weakref

annotate Lib/distutils/filelist.py @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents 9a4b19330aa9
children 384f965e12cd
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 """distutils.filelist
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2
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3 Provides the FileList class, used for poking about the filesystem
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4 and building lists of files.
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5 """
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6
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7 __revision__ = "$Id$"
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8
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9 import os, string, re
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10 import fnmatch
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11 from types import *
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12 from distutils.util import convert_path
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13 from distutils.errors import DistutilsTemplateError, DistutilsInternalError
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14 from distutils import log
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15
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16 class FileList:
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17
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18 """A list of files built by on exploring the filesystem and filtered by
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19 applying various patterns to what we find there.
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20
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21 Instance attributes:
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22 dir
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23 directory from which files will be taken -- only used if
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24 'allfiles' not supplied to constructor
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25 files
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26 list of filenames currently being built/filtered/manipulated
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27 allfiles
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28 complete list of files under consideration (ie. without any
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29 filtering applied)
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30 """
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31
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32 def __init__(self,
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33 warn=None,
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34 debug_print=None):
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35 # ignore argument to FileList, but keep them for backwards
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36 # compatibility
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37
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38 self.allfiles = None
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39 self.files = []
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40
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41 def set_allfiles (self, allfiles):
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42 self.allfiles = allfiles
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43
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44 def findall (self, dir=os.curdir):
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45 self.allfiles = findall(dir)
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46
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47 def debug_print (self, msg):
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48 """Print 'msg' to stdout if the global DEBUG (taken from the
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49 DISTUTILS_DEBUG environment variable) flag is true.
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50 """
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51 from distutils.debug import DEBUG
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52 if DEBUG:
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53 print msg
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54
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55 # -- List-like methods ---------------------------------------------
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56
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57 def append (self, item):
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58 self.files.append(item)
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59
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60 def extend (self, items):
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61 self.files.extend(items)
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62
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63 def sort (self):
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64 # Not a strict lexical sort!
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65 sortable_files = map(os.path.split, self.files)
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66 sortable_files.sort()
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67 self.files = []
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68 for sort_tuple in sortable_files:
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69 self.files.append(apply(os.path.join, sort_tuple))
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70
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71
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72 # -- Other miscellaneous utility methods ---------------------------
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73
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74 def remove_duplicates (self):
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75 # Assumes list has been sorted!
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76 for i in range(len(self.files) - 1, 0, -1):
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77 if self.files[i] == self.files[i - 1]:
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78 del self.files[i]
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79
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80
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81 # -- "File template" methods ---------------------------------------
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82
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83 def _parse_template_line (self, line):
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84 words = string.split(line)
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85 action = words[0]
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86
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87 patterns = dir = dir_pattern = None
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88
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89 if action in ('include', 'exclude',
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90 'global-include', 'global-exclude'):
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91 if len(words) < 2:
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92 raise DistutilsTemplateError, \
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93 "'%s' expects <pattern1> <pattern2> ..." % action
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94
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95 patterns = map(convert_path, words[1:])
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96
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97 elif action in ('recursive-include', 'recursive-exclude'):
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98 if len(words) < 3:
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99 raise DistutilsTemplateError, \
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100 "'%s' expects <dir> <pattern1> <pattern2> ..." % action
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101
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102 dir = convert_path(words[1])
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103 patterns = map(convert_path, words[2:])
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104
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105 elif action in ('graft', 'prune'):
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106 if len(words) != 2:
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107 raise DistutilsTemplateError, \
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108 "'%s' expects a single <dir_pattern>" % action
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109
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110 dir_pattern = convert_path(words[1])
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111
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112 else:
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113 raise DistutilsTemplateError, "unknown action '%s'" % action
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114
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115 return (action, patterns, dir, dir_pattern)
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116
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117 # _parse_template_line ()
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118
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119
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120 def process_template_line (self, line):
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121
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122 # Parse the line: split it up, make sure the right number of words
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123 # is there, and return the relevant words. 'action' is always
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124 # defined: it's the first word of the line. Which of the other
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125 # three are defined depends on the action; it'll be either
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126 # patterns, (dir and patterns), or (dir_pattern).
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127 (action, patterns, dir, dir_pattern) = self._parse_template_line(line)
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128
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129 # OK, now we know that the action is valid and we have the
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130 # right number of words on the line for that action -- so we
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131 # can proceed with minimal error-checking.
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132 if action == 'include':
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133 self.debug_print("include " + string.join(patterns))
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134 for pattern in patterns:
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135 if not self.include_pattern(pattern, anchor=1):
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136 log.warn("warning: no files found matching '%s'",
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137 pattern)
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138
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139 elif action == 'exclude':
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140 self.debug_print("exclude " + string.join(patterns))
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141 for pattern in patterns:
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142 if not self.exclude_pattern(pattern, anchor=1):
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143 log.warn(("warning: no previously-included files "
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144 "found matching '%s'"), pattern)
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145
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146 elif action == 'global-include':
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147 self.debug_print("global-include " + string.join(patterns))
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148 for pattern in patterns:
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149 if not self.include_pattern(pattern, anchor=0):
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150 log.warn(("warning: no files found matching '%s' " +
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151 "anywhere in distribution"), pattern)
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152
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153 elif action == 'global-exclude':
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154 self.debug_print("global-exclude " + string.join(patterns))
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155 for pattern in patterns:
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156 if not self.exclude_pattern(pattern, anchor=0):
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157 log.warn(("warning: no previously-included files matching "
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158 "'%s' found anywhere in distribution"),
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159 pattern)
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160
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161 elif action == 'recursive-include':
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162 self.debug_print("recursive-include %s %s" %
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163 (dir, string.join(patterns)))
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164 for pattern in patterns:
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165 if not self.include_pattern(pattern, prefix=dir):
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166 log.warn(("warning: no files found matching '%s' " +
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167 "under directory '%s'"),
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168 pattern, dir)
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169
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170 elif action == 'recursive-exclude':
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171 self.debug_print("recursive-exclude %s %s" %
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172 (dir, string.join(patterns)))
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173 for pattern in patterns:
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174 if not self.exclude_pattern(pattern, prefix=dir):
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175 log.warn(("warning: no previously-included files matching "
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176 "'%s' found under directory '%s'"),
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177 pattern, dir)
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178
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179 elif action == 'graft':
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180 self.debug_print("graft " + dir_pattern)
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181 if not self.include_pattern(None, prefix=dir_pattern):
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182 log.warn("warning: no directories found matching '%s'",
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183 dir_pattern)
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184
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185 elif action == 'prune':
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186 self.debug_print("prune " + dir_pattern)
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187 if not self.exclude_pattern(None, prefix=dir_pattern):
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188 log.warn(("no previously-included directories found " +
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189 "matching '%s'"), dir_pattern)
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190 else:
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191 raise DistutilsInternalError, \
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192 "this cannot happen: invalid action '%s'" % action
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193
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194 # process_template_line ()
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195
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196
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197 # -- Filtering/selection methods -----------------------------------
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198
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199 def include_pattern (self, pattern,
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200 anchor=1, prefix=None, is_regex=0):
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201 """Select strings (presumably filenames) from 'self.files' that
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202 match 'pattern', a Unix-style wildcard (glob) pattern. Patterns
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203 are not quite the same as implemented by the 'fnmatch' module: '*'
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204 and '?' match non-special characters, where "special" is platform-
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205 dependent: slash on Unix; colon, slash, and backslash on
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206 DOS/Windows; and colon on Mac OS.
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207
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208 If 'anchor' is true (the default), then the pattern match is more
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209 stringent: "*.py" will match "foo.py" but not "foo/bar.py". If
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210 'anchor' is false, both of these will match.
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211
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212 If 'prefix' is supplied, then only filenames starting with 'prefix'
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213 (itself a pattern) and ending with 'pattern', with anything in between
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214 them, will match. 'anchor' is ignored in this case.
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215
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216 If 'is_regex' is true, 'anchor' and 'prefix' are ignored, and
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217 'pattern' is assumed to be either a string containing a regex or a
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218 regex object -- no translation is done, the regex is just compiled
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219 and used as-is.
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220
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221 Selected strings will be added to self.files.
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222
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223 Return 1 if files are found.
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224 """
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225 files_found = 0
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226 pattern_re = translate_pattern(pattern, anchor, prefix, is_regex)
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227 self.debug_print("include_pattern: applying regex r'%s'" %
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228 pattern_re.pattern)
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229
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230 # delayed loading of allfiles list
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231 if self.allfiles is None:
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232 self.findall()
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233
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234 for name in self.allfiles:
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235 if pattern_re.search(name):
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236 self.debug_print(" adding " + name)
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237 self.files.append(name)
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238 files_found = 1
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239
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240 return files_found
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241
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242 # include_pattern ()
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243
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244
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245 def exclude_pattern (self, pattern,
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246 anchor=1, prefix=None, is_regex=0):
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247 """Remove strings (presumably filenames) from 'files' that match
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248 'pattern'. Other parameters are the same as for
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249 'include_pattern()', above.
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250 The list 'self.files' is modified in place.
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251 Return 1 if files are found.
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252 """
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253 files_found = 0
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254 pattern_re = translate_pattern(pattern, anchor, prefix, is_regex)
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255 self.debug_print("exclude_pattern: applying regex r'%s'" %
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256 pattern_re.pattern)
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257 for i in range(len(self.files)-1, -1, -1):
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258 if pattern_re.search(self.files[i]):
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259 self.debug_print(" removing " + self.files[i])
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260 del self.files[i]
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261 files_found = 1
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262
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263 return files_found
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264
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265 # exclude_pattern ()
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266
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267 # class FileList
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268
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269
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270 # ----------------------------------------------------------------------
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271 # Utility functions
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272
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273 def findall (dir = os.curdir):
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274 """Find all files under 'dir' and return the list of full filenames
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275 (relative to 'dir').
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276 """
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277 from stat import ST_MODE, S_ISREG, S_ISDIR, S_ISLNK
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278
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279 list = []
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280 stack = [dir]
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281 pop = stack.pop
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282 push = stack.append
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283
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284 while stack:
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285 dir = pop()
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286 names = os.listdir(dir)
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287
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288 for name in names:
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289 if dir != os.curdir: # avoid the dreaded "./" syndrome
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290 fullname = os.path.join(dir, name)
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291 else:
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292 fullname = name
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293
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294 # Avoid excess stat calls -- just one will do, thank you!
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295 stat = os.stat(fullname)
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296 mode = stat[ST_MODE]
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297 if S_ISREG(mode):
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298 list.append(fullname)
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299 elif S_ISDIR(mode) and not S_ISLNK(mode):
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300 push(fullname)
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301
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302 return list
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303
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304
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305 def glob_to_re(pattern):
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306 """Translate a shell-like glob pattern to a regular expression; return
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307 a string containing the regex. Differs from 'fnmatch.translate()' in
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308 that '*' does not match "special characters" (which are
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309 platform-specific).
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310 """
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311 pattern_re = fnmatch.translate(pattern)
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312
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313 # '?' and '*' in the glob pattern become '.' and '.*' in the RE, which
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314 # IMHO is wrong -- '?' and '*' aren't supposed to match slash in Unix,
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315 # and by extension they shouldn't match such "special characters" under
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316 # any OS. So change all non-escaped dots in the RE to match any
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317 # character except the special characters.
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318 # XXX currently the "special characters" are just slash -- i.e. this is
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319 # Unix-only.
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320 pattern_re = re.sub(r'((?<!\\)(\\\\)*)\.', r'\1[^/]', pattern_re)
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321
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322 return pattern_re
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323
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324 # glob_to_re ()
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325
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326
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327 def translate_pattern (pattern, anchor=1, prefix=None, is_regex=0):
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328 """Translate a shell-like wildcard pattern to a compiled regular
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329 expression. Return the compiled regex. If 'is_regex' true,
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330 then 'pattern' is directly compiled to a regex (if it's a string)
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331 or just returned as-is (assumes it's a regex object).
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332 """
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333 if is_regex:
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334 if type(pattern) is StringType:
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335 return re.compile(pattern)
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336 else:
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337 return pattern
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338
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339 if pattern:
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340 pattern_re = glob_to_re(pattern)
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341 else:
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342 pattern_re = ''
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343
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344 if prefix is not None:
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345 prefix_re = (glob_to_re(prefix))[0:-1] # ditch trailing $
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346 pattern_re = "^" + os.path.join(prefix_re, ".*" + pattern_re)
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347 else: # no prefix -- respect anchor flag
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348 if anchor:
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349 pattern_re = "^" + pattern_re
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350
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351 return re.compile(pattern_re)
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352
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353 # translate_pattern ()