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annotate lib/python3.8/site-packages/pip/_vendor/distlib/manifest.py @ 0:9e54283cc701 draft

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"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400
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1 # -*- coding: utf-8 -*-
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2 #
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3 # Copyright (C) 2012-2013 Python Software Foundation.
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4 # See LICENSE.txt and CONTRIBUTORS.txt.
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5 #
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6 """
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7 Class representing the list of files in a distribution.
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8
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9 Equivalent to distutils.filelist, but fixes some problems.
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10 """
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11 import fnmatch
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12 import logging
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13 import os
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14 import re
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15 import sys
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16
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17 from . import DistlibException
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18 from .compat import fsdecode
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19 from .util import convert_path
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20
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21
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22 __all__ = ['Manifest']
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23
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24 logger = logging.getLogger(__name__)
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25
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26 # a \ followed by some spaces + EOL
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27 _COLLAPSE_PATTERN = re.compile('\\\\w*\n', re.M)
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28 _COMMENTED_LINE = re.compile('#.*?(?=\n)|\n(?=$)', re.M | re.S)
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29
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30 #
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31 # Due to the different results returned by fnmatch.translate, we need
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32 # to do slightly different processing for Python 2.7 and 3.2 ... this needed
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33 # to be brought in for Python 3.6 onwards.
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34 #
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35 _PYTHON_VERSION = sys.version_info[:2]
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36
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37 class Manifest(object):
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38 """A list of files built by on exploring the filesystem and filtered by
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39 applying various patterns to what we find there.
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40 """
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41
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42 def __init__(self, base=None):
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43 """
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44 Initialise an instance.
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45
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46 :param base: The base directory to explore under.
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47 """
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48 self.base = os.path.abspath(os.path.normpath(base or os.getcwd()))
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49 self.prefix = self.base + os.sep
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50 self.allfiles = None
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51 self.files = set()
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52
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53 #
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54 # Public API
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55 #
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56
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57 def findall(self):
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58 """Find all files under the base and set ``allfiles`` to the absolute
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59 pathnames of files found.
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60 """
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61 from stat import S_ISREG, S_ISDIR, S_ISLNK
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62
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63 self.allfiles = allfiles = []
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64 root = self.base
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65 stack = [root]
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66 pop = stack.pop
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67 push = stack.append
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68
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69 while stack:
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70 root = pop()
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71 names = os.listdir(root)
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72
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73 for name in names:
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74 fullname = os.path.join(root, name)
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75
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76 # Avoid excess stat calls -- just one will do, thank you!
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77 stat = os.stat(fullname)
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78 mode = stat.st_mode
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79 if S_ISREG(mode):
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80 allfiles.append(fsdecode(fullname))
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81 elif S_ISDIR(mode) and not S_ISLNK(mode):
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82 push(fullname)
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83
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84 def add(self, item):
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85 """
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86 Add a file to the manifest.
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87
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88 :param item: The pathname to add. This can be relative to the base.
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89 """
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90 if not item.startswith(self.prefix):
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91 item = os.path.join(self.base, item)
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92 self.files.add(os.path.normpath(item))
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93
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94 def add_many(self, items):
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95 """
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96 Add a list of files to the manifest.
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97
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98 :param items: The pathnames to add. These can be relative to the base.
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99 """
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100 for item in items:
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101 self.add(item)
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102
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103 def sorted(self, wantdirs=False):
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104 """
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105 Return sorted files in directory order
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106 """
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107
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108 def add_dir(dirs, d):
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109 dirs.add(d)
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110 logger.debug('add_dir added %s', d)
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111 if d != self.base:
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112 parent, _ = os.path.split(d)
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113 assert parent not in ('', '/')
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114 add_dir(dirs, parent)
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115
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116 result = set(self.files) # make a copy!
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117 if wantdirs:
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118 dirs = set()
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119 for f in result:
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120 add_dir(dirs, os.path.dirname(f))
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121 result |= dirs
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122 return [os.path.join(*path_tuple) for path_tuple in
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123 sorted(os.path.split(path) for path in result)]
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124
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125 def clear(self):
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126 """Clear all collected files."""
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127 self.files = set()
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128 self.allfiles = []
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129
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130 def process_directive(self, directive):
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131 """
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132 Process a directive which either adds some files from ``allfiles`` to
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133 ``files``, or removes some files from ``files``.
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134
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135 :param directive: The directive to process. This should be in a format
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136 compatible with distutils ``MANIFEST.in`` files:
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137
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138 http://docs.python.org/distutils/sourcedist.html#commands
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139 """
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140 # Parse the line: split it up, make sure the right number of words
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141 # is there, and return the relevant words. 'action' is always
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142 # defined: it's the first word of the line. Which of the other
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143 # three are defined depends on the action; it'll be either
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144 # patterns, (dir and patterns), or (dirpattern).
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145 action, patterns, thedir, dirpattern = self._parse_directive(directive)
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146
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147 # OK, now we know that the action is valid and we have the
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148 # right number of words on the line for that action -- so we
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149 # can proceed with minimal error-checking.
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150 if action == 'include':
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151 for pattern in patterns:
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152 if not self._include_pattern(pattern, anchor=True):
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153 logger.warning('no files found matching %r', pattern)
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154
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155 elif action == 'exclude':
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156 for pattern in patterns:
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157 found = self._exclude_pattern(pattern, anchor=True)
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158 #if not found:
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159 # logger.warning('no previously-included files '
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160 # 'found matching %r', pattern)
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161
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162 elif action == 'global-include':
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163 for pattern in patterns:
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164 if not self._include_pattern(pattern, anchor=False):
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165 logger.warning('no files found matching %r '
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166 'anywhere in distribution', pattern)
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167
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168 elif action == 'global-exclude':
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169 for pattern in patterns:
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170 found = self._exclude_pattern(pattern, anchor=False)
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171 #if not found:
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172 # logger.warning('no previously-included files '
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173 # 'matching %r found anywhere in '
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174 # 'distribution', pattern)
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175
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176 elif action == 'recursive-include':
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177 for pattern in patterns:
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178 if not self._include_pattern(pattern, prefix=thedir):
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179 logger.warning('no files found matching %r '
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180 'under directory %r', pattern, thedir)
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181
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182 elif action == 'recursive-exclude':
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183 for pattern in patterns:
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184 found = self._exclude_pattern(pattern, prefix=thedir)
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185 #if not found:
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186 # logger.warning('no previously-included files '
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187 # 'matching %r found under directory %r',
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188 # pattern, thedir)
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189
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190 elif action == 'graft':
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191 if not self._include_pattern(None, prefix=dirpattern):
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192 logger.warning('no directories found matching %r',
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193 dirpattern)
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194
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195 elif action == 'prune':
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196 if not self._exclude_pattern(None, prefix=dirpattern):
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197 logger.warning('no previously-included directories found '
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198 'matching %r', dirpattern)
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199 else: # pragma: no cover
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200 # This should never happen, as it should be caught in
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201 # _parse_template_line
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202 raise DistlibException(
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203 'invalid action %r' % action)
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204
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205 #
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206 # Private API
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207 #
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208
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209 def _parse_directive(self, directive):
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210 """
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211 Validate a directive.
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212 :param directive: The directive to validate.
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213 :return: A tuple of action, patterns, thedir, dir_patterns
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214 """
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215 words = directive.split()
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216 if len(words) == 1 and words[0] not in ('include', 'exclude',
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217 'global-include',
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218 'global-exclude',
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219 'recursive-include',
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220 'recursive-exclude',
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221 'graft', 'prune'):
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222 # no action given, let's use the default 'include'
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223 words.insert(0, 'include')
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224
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225 action = words[0]
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226 patterns = thedir = dir_pattern = None
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227
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228 if action in ('include', 'exclude',
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229 'global-include', 'global-exclude'):
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230 if len(words) < 2:
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231 raise DistlibException(
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232 '%r expects <pattern1> <pattern2> ...' % action)
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233
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234 patterns = [convert_path(word) for word in words[1:]]
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235
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236 elif action in ('recursive-include', 'recursive-exclude'):
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237 if len(words) < 3:
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238 raise DistlibException(
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239 '%r expects <dir> <pattern1> <pattern2> ...' % action)
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240
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241 thedir = convert_path(words[1])
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242 patterns = [convert_path(word) for word in words[2:]]
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243
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244 elif action in ('graft', 'prune'):
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245 if len(words) != 2:
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246 raise DistlibException(
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247 '%r expects a single <dir_pattern>' % action)
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248
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249 dir_pattern = convert_path(words[1])
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250
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251 else:
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252 raise DistlibException('unknown action %r' % action)
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253
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254 return action, patterns, thedir, dir_pattern
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255
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256 def _include_pattern(self, pattern, anchor=True, prefix=None,
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257 is_regex=False):
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258 """Select strings (presumably filenames) from 'self.files' that
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259 match 'pattern', a Unix-style wildcard (glob) pattern.
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260
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261 Patterns are not quite the same as implemented by the 'fnmatch'
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262 module: '*' and '?' match non-special characters, where "special"
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263 is platform-dependent: slash on Unix; colon, slash, and backslash on
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264 DOS/Windows; and colon on Mac OS.
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265
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266 If 'anchor' is true (the default), then the pattern match is more
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267 stringent: "*.py" will match "foo.py" but not "foo/bar.py". If
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268 'anchor' is false, both of these will match.
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269
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270 If 'prefix' is supplied, then only filenames starting with 'prefix'
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271 (itself a pattern) and ending with 'pattern', with anything in between
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272 them, will match. 'anchor' is ignored in this case.
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273
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274 If 'is_regex' is true, 'anchor' and 'prefix' are ignored, and
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275 'pattern' is assumed to be either a string containing a regex or a
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276 regex object -- no translation is done, the regex is just compiled
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277 and used as-is.
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278
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279 Selected strings will be added to self.files.
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280
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281 Return True if files are found.
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282 """
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283 # XXX docstring lying about what the special chars are?
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284 found = False
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285 pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)
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286
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287 # delayed loading of allfiles list
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288 if self.allfiles is None:
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289 self.findall()
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290
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291 for name in self.allfiles:
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292 if pattern_re.search(name):
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293 self.files.add(name)
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294 found = True
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295 return found
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296
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297 def _exclude_pattern(self, pattern, anchor=True, prefix=None,
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298 is_regex=False):
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299 """Remove strings (presumably filenames) from 'files' that match
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300 'pattern'.
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301
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302 Other parameters are the same as for 'include_pattern()', above.
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303 The list 'self.files' is modified in place. Return True if files are
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304 found.
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305
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306 This API is public to allow e.g. exclusion of SCM subdirs, e.g. when
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307 packaging source distributions
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308 """
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309 found = False
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310 pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)
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311 for f in list(self.files):
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312 if pattern_re.search(f):
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313 self.files.remove(f)
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314 found = True
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315 return found
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316
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317 def _translate_pattern(self, pattern, anchor=True, prefix=None,
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318 is_regex=False):
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319 """Translate a shell-like wildcard pattern to a compiled regular
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320 expression.
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321
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322 Return the compiled regex. If 'is_regex' true,
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323 then 'pattern' is directly compiled to a regex (if it's a string)
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324 or just returned as-is (assumes it's a regex object).
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325 """
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326 if is_regex:
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327 if isinstance(pattern, str):
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328 return re.compile(pattern)
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329 else:
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330 return pattern
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331
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332 if _PYTHON_VERSION > (3, 2):
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333 # ditch start and end characters
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334 start, _, end = self._glob_to_re('_').partition('_')
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335
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336 if pattern:
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337 pattern_re = self._glob_to_re(pattern)
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338 if _PYTHON_VERSION > (3, 2):
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339 assert pattern_re.startswith(start) and pattern_re.endswith(end)
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340 else:
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341 pattern_re = ''
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342
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343 base = re.escape(os.path.join(self.base, ''))
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344 if prefix is not None:
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345 # ditch end of pattern character
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346 if _PYTHON_VERSION <= (3, 2):
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347 empty_pattern = self._glob_to_re('')
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348 prefix_re = self._glob_to_re(prefix)[:-len(empty_pattern)]
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349 else:
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350 prefix_re = self._glob_to_re(prefix)
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351 assert prefix_re.startswith(start) and prefix_re.endswith(end)
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352 prefix_re = prefix_re[len(start): len(prefix_re) - len(end)]
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353 sep = os.sep
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354 if os.sep == '\\':
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355 sep = r'\\'
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356 if _PYTHON_VERSION <= (3, 2):
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357 pattern_re = '^' + base + sep.join((prefix_re,
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358 '.*' + pattern_re))
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359 else:
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360 pattern_re = pattern_re[len(start): len(pattern_re) - len(end)]
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361 pattern_re = r'%s%s%s%s.*%s%s' % (start, base, prefix_re, sep,
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362 pattern_re, end)
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363 else: # no prefix -- respect anchor flag
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364 if anchor:
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365 if _PYTHON_VERSION <= (3, 2):
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366 pattern_re = '^' + base + pattern_re
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367 else:
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368 pattern_re = r'%s%s%s' % (start, base, pattern_re[len(start):])
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369
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370 return re.compile(pattern_re)
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371
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372 def _glob_to_re(self, pattern):
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373 """Translate a shell-like glob pattern to a regular expression.
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374
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375 Return a string containing the regex. Differs from
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376 'fnmatch.translate()' in that '*' does not match "special characters"
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377 (which are platform-specific).
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378 """
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379 pattern_re = fnmatch.translate(pattern)
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380
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381 # '?' and '*' in the glob pattern become '.' and '.*' in the RE, which
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
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382 # IMHO is wrong -- '?' and '*' aren't supposed to match slash in Unix,
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
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383 # and by extension they shouldn't match such "special characters" under
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
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384 # any OS. So change all non-escaped dots in the RE to match any
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
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385 # character except the special characters (currently: just os.sep).
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
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386 sep = os.sep
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guerler
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387 if os.sep == '\\':
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
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388 # we're using a regex to manipulate a regex, so we need
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
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389 # to escape the backslash twice
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
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390 sep = r'\\\\'
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guerler
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391 escaped = r'\1[^%s]' % sep
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
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392 pattern_re = re.sub(r'((?<!\\)(\\\\)*)\.', escaped, pattern_re)
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
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393 return pattern_re