Mercurial > piecrust2

annotate tests/memfs.py @ 1086:84e1d2c587ae 3.0.1

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cm: Regenerate the CHANGELOG.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 15 Feb 2018 22:29:40 -0800
parents f987b29d6fab
children
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rev   line source
411
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1 import os.path
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2 import io
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3 import time
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4 import errno
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5 import random
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6 import codecs
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7 import shutil
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8 import mock
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9 from piecrust import RESOURCES_DIR
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10 from .basefs import TestFileSystemBase
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11
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12
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13 class _MockFsEntry(object):
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14 def __init__(self, contents):
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15 self.contents = contents
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16 self.metadata = {'mtime': time.time()}
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17
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18
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19 class _MockFsEntryWriter(object):
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20 def __init__(self, entry, mode='rt'):
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21 self._entry = entry
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22 self._mode = mode
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23
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24 if 'b' in mode:
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25 data = entry.contents
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26 if isinstance(data, str):
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27 data = data.encode('utf8')
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28 self._stream = io.BytesIO(data)
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29 else:
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30 self._stream = io.StringIO(entry.contents)
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31
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32 def __getattr__(self, name):
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33 return getattr(self._stream, name)
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34
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35 def __enter__(self):
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36 return self
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37
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38 def __exit__(self, exc_type, exc_value, exc_tb):
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39 if 'w' in self._mode:
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40 if 'a' in self._mode:
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41 self._entry.contents += self._stream.getvalue()
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42 else:
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43 self._entry.contents = self._stream.getvalue()
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44 self._entry.metadata['mtime'] = time.time()
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45 self._stream.close()
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46
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47
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48 class MemoryFileSystem(TestFileSystemBase):
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49 def __init__(self):
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50 self._root = 'root_%d' % random.randrange(1000)
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51 self._fs = {self._root: {}}
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52
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53 def path(self, p):
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54 p = p.replace('\\', '/')
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55 if p in ['/', '', None]:
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56 return '/%s' % self._root
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57 return '/%s/%s' % (self._root, p.lstrip('/'))
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58
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59 def getStructure(self, path=None):
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60 root = self._fs[self._root]
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61 if path:
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62 root = self._getEntry(self.path(path))
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63 if root is None:
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64 raise Exception("No such path: %s" % path)
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65 if not isinstance(root, dict):
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66 raise Exception("Path is not a directory: %s" % path)
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67
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68 res = {}
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69 for k, v in root.items():
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70 self._getStructureRecursive(v, res, k)
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71 return res
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72
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73 def getFileEntry(self, path):
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74 entry = self._getEntry(self.path(path))
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75 if entry is None:
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76 raise Exception("No such file: %s" % path)
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77 if not isinstance(entry, _MockFsEntry):
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78 raise Exception("Path is not a file: %s" % path)
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79 return entry.contents
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80
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81 def _getStructureRecursive(self, src, target, name):
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82 if isinstance(src, _MockFsEntry):
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83 target[name] = src.contents
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84 return
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85
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86 e = {}
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87 for k, v in src.items():
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88 self._getStructureRecursive(v, e, k)
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89 target[name] = e
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90
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91 def _getEntry(self, path):
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92 cur = self._fs
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93 path = path.replace('\\', '/').lstrip('/')
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94 bits = path.split('/')
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95 for p in bits:
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96 try:
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97 cur = cur[p]
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98 except KeyError:
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99 return None
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100 return cur
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101
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102 def _createDir(self, path):
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103 cur = self._fs
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104 path = path.replace('\\', '/').strip('/')
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105 bits = path.split('/')
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106 for b in bits:
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107 if b not in cur:
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108 cur[b] = {}
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109 cur = cur[b]
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110 return self
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111
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112 def _createFile(self, path, contents):
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113 cur = self._fs
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114 path = path.replace('\\', '/').lstrip('/')
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115 bits = path.split('/')
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116 for b in bits[:-1]:
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117 if b not in cur:
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118 cur[b] = {}
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119 cur = cur[b]
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120 cur[bits[-1]] = _MockFsEntry(contents)
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121 return self
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122
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123 def _deleteEntry(self, path):
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124 parent = self._getEntry(os.path.dirname(path))
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125 assert parent is not None
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126 name = os.path.basename(path)
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127 assert name in parent
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128 del parent[name]
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129
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130
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131 class MemoryScope(object):
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132 def __init__(self, fs, open_patches=None):
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133 self.open_patches = open_patches or []
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134 self._fs = fs
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135 self._patchers = []
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136 self._originals = {}
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137
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138 @property
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139 def root(self):
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140 return self._fs._root
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141
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142 def __enter__(self):
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143 self._startMock()
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144 return self
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145
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parents:
diff changeset
146 def __exit__(self, type, value, traceback):
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diff changeset
147 self._endMock()
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148
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diff changeset
149 def _startMock(self):
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150 # TODO: sadly, there seems to be no way to replace `open` everywhere?
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diff changeset
151 modules = self.open_patches + [
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152 '__main__',
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153 'piecrust.records',
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Ludovic Chabant <ludovic@chabant.com>
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154 'jinja2.utils']
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Ludovic Chabant <ludovic@chabant.com>
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155 for m in modules:
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
156 self._createMock('%s.open' % m, open, self._open, create=True)
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157
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158 self._createMock('codecs.open', codecs.open, self._codecsOpen)
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159 self._createMock('os.listdir', os.listdir, self._listdir)
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160 self._createMock('os.makedirs', os.makedirs, self._makedirs)
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161 self._createMock('os.remove', os.remove, self._remove)
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Ludovic Chabant <ludovic@chabant.com>
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162 self._createMock('os.rename', os.rename, self._rename)
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Ludovic Chabant <ludovic@chabant.com>
parents:
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163 self._createMock('os.path.exists', os.path.exists, self._exists)
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Ludovic Chabant <ludovic@chabant.com>
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164 self._createMock('os.path.isdir', os.path.isdir, self._isdir)
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165 self._createMock('os.path.isfile', os.path.isfile, self._isfile)
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Ludovic Chabant <ludovic@chabant.com>
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166 self._createMock('os.path.islink', os.path.islink, self._islink)
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Ludovic Chabant <ludovic@chabant.com>
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167 self._createMock('os.path.getmtime', os.path.getmtime, self._getmtime)
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Ludovic Chabant <ludovic@chabant.com>
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168 self._createMock('shutil.copyfile', shutil.copyfile, self._copyfile)
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169 self._createMock('shutil.rmtree', shutil.rmtree, self._rmtree)
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Ludovic Chabant <ludovic@chabant.com>
parents:
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170 for p in self._patchers:
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Ludovic Chabant <ludovic@chabant.com>
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171 p.start()
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172
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173 def _endMock(self):
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174 for p in self._patchers:
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diff changeset
175 p.stop()
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176
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177 def _createMock(self, name, orig, func, **kwargs):
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178 self._originals[name] = orig
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179 self._patchers.append(mock.patch(name, func, **kwargs))
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180
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181 def _doOpen(self, orig_name, path, mode, *args, **kwargs):
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182 path = os.path.normpath(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
183 if path.startswith(RESOURCES_DIR):
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Ludovic Chabant <ludovic@chabant.com>
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184 return self._originals[orig_name](path, mode, *args, **kwargs)
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Ludovic Chabant <ludovic@chabant.com>
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185
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Ludovic Chabant <ludovic@chabant.com>
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186 if 'r' in mode:
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Ludovic Chabant <ludovic@chabant.com>
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187 e = self._getFsEntry(path)
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Ludovic Chabant <ludovic@chabant.com>
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188 elif 'w' in mode or 'x' in mode or 'a' in mode:
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Ludovic Chabant <ludovic@chabant.com>
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189 e = self._getFsEntry(path)
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
190 if e is None:
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
191 contents = ''
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Ludovic Chabant <ludovic@chabant.com>
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192 if 'b' in mode:
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Ludovic Chabant <ludovic@chabant.com>
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193 contents = bytes()
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Ludovic Chabant <ludovic@chabant.com>
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194 self._fs._createFile(path, contents)
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Ludovic Chabant <ludovic@chabant.com>
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195 e = self._getFsEntry(path)
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
196 assert e is not None
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
197 elif 'x' in mode:
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
198 err = IOError("File '%s' already exists" % path)
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
199 err.errno = errno.EEXIST
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
200 raise err
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
201 else:
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
202 err = IOError("Unsupported open mode: %s" % mode)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
203 err.errno = errno.EINVAL
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
204 raise err
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
205
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
206 if e is None:
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
207 err = IOError("No such file: %s" % path)
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Ludovic Chabant <ludovic@chabant.com>
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208 err.errno = errno.ENOENT
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
209 raise err
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
210 if not isinstance(e, _MockFsEntry):
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
211 err = IOError("'%s' is not a file %s" % (path, e))
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
212 err.errno = errno.EISDIR
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
213 raise err
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Ludovic Chabant <ludovic@chabant.com>
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214
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215 return _MockFsEntryWriter(e, mode)
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diff changeset
216
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217 def _open(self, path, mode, *args, **kwargs):
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218 return self._doOpen('__main__.open', path, mode, *args, **kwargs)
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parents:
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219
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220 def _codecsOpen(self, path, mode, *args, **kwargs):
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221 return self._doOpen('codecs.open', path, mode, *args, **kwargs)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
222
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
223 def _listdir(self, path):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
224 path = os.path.normpath(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
225 if path.startswith(RESOURCES_DIR):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
226 return self._originals['os.listdir'](path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
227
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
228 e = self._getFsEntry(path)
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
229 if e is None:
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
230 raise OSError("No such directory: %s" % path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
231 if not isinstance(e, dict):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
232 raise OSError("'%s' is not a directory." % path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
233 return list(e.keys())
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
234
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
235 def _makedirs(self, path, mode=0o777):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
236 if not path.replace('\\', '/').startswith('/' + self.root):
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
237 raise Exception("Shouldn't create directory: %s" % path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
238 self._fs._createDir(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
239
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
240 def _remove(self, path):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
241 path = os.path.normpath(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
242 self._fs._deleteEntry(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
243
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
244 def _exists(self, path):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
245 path = os.path.normpath(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
246 if path.startswith(RESOURCES_DIR):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
247 return self._originals['os.path.isdir'](path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
248 e = self._getFsEntry(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
249 return e is not None
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
250
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
251 def _isdir(self, path):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
252 path = os.path.normpath(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
253 if path.startswith(RESOURCES_DIR):
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
254 return self._originals['os.path.isdir'](path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
255 e = self._getFsEntry(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
256 return e is not None and isinstance(e, dict)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
257
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
258 def _isfile(self, path):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
259 path = os.path.normpath(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
260 if path.startswith(RESOURCES_DIR):
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
261 return self._originals['os.path.isfile'](path)
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
262 e = self._getFsEntry(path)
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
263 return e is not None and isinstance(e, _MockFsEntry)
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
264
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
265 def _islink(self, path):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
266 path = os.path.normpath(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
267 if path.startswith(RESOURCES_DIR):
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
268 return self._originals['os.path.islink'](path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
269 return False
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
270
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
271 def _getmtime(self, path):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
272 path = os.path.normpath(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
273 if path.startswith(RESOURCES_DIR):
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
274 return self._originals['os.path.getmtime'](path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
275 e = self._getFsEntry(path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
276 if e is None:
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
277 raise OSError("No such file: %s" % path)
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Ludovic Chabant <ludovic@chabant.com>
parents:
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278 return e.metadata['mtime']
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279
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280 def _copyfile(self, src, dst):
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281 src = os.path.normpath(src)
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282 if src.startswith(RESOURCES_DIR):
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283 with self._originals['__main__.open'](src, 'r') as fp:
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284 src_text = fp.read()
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285 else:
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286 e = self._getFsEntry(src)
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287 src_text = e.contents
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288 if not dst.replace('\\', '/').startswith('/' + self.root):
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289 raise Exception("Shouldn't copy to: %s" % dst)
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290 self._fs._createFile(dst, src_text)
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291
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292 def _rename(self, src, dst):
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293 src = os.path.normpath(src)
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294 if src.startswith(RESOURCES_DIR) or dst.startswith(RESOURCES_DIR):
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295 raise Exception("Shouldn't rename files in the resources path.")
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296 self._copyfile(src, dst)
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297 self._remove(src)
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298
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299 def _rmtree(self, path):
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300 if not path.replace('\\', '/').startswith('/' + self.root):
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301 raise Exception("Shouldn't delete trees from: %s" % path)
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302 e = self._fs._getEntry(os.path.dirname(path))
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303 del e[os.path.basename(path)]
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304
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305 def _getFsEntry(self, path):
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306 return self._fs._getEntry(path)
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307