Mercurial > public > mercurial-scm > hg

annotate mercurial/narrowspec.py @ 38839:f64ebe7d2259

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narrowspec: use sparse.parseconfig() to parse narrowspec file (BC) This also make narrow files use 'include' and 'exclude' instead of plural forms which are 'includes' and 'excludes'. This is BC because existing narrowspecs have to replace excludes, includes words with exclude and include i.e. their singular versions. Differential Revision: https://phab.mercurial-scm.org/D4057
author Pulkit Goyal <pulkit@yandex-team.ru>
date Fri, 03 Aug 2018 22:29:04 +0530
parents fed6fe856333
children 794afa91f0a5
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1 # narrowspec.py - methods for working with a narrow view of a repository
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2 #
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3 # Copyright 2017 Google, Inc.
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 import errno
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11
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12 from .i18n import _
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13 from . import (
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14 error,
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15 match as matchmod,
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16 sparse,
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17 util,
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18 )
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19
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20 FILENAME = 'narrowspec'
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21
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22 def _parsestoredpatterns(text):
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23 """Parses the narrowspec format that's stored on disk."""
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24 patlist = None
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25 includepats = []
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26 excludepats = []
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27 for l in text.splitlines():
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28 if l == '[includes]':
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29 if patlist is None:
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30 patlist = includepats
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31 else:
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32 raise error.Abort(_('narrowspec includes section must appear '
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33 'at most once, before excludes'))
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34 elif l == '[excludes]':
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35 if patlist is not excludepats:
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36 patlist = excludepats
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37 else:
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38 raise error.Abort(_('narrowspec excludes section must appear '
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39 'at most once'))
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40 else:
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41 patlist.append(l)
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42
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43 return set(includepats), set(excludepats)
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44
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45 def parseserverpatterns(text):
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46 """Parses the narrowspec format that's returned by the server."""
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47 includepats = set()
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48 excludepats = set()
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49
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50 # We get one entry per line, in the format "<key> <value>".
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51 # It's OK for value to contain other spaces.
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52 for kp in (l.split(' ', 1) for l in text.splitlines()):
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53 if len(kp) != 2:
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54 raise error.Abort(_('Invalid narrowspec pattern line: "%s"') % kp)
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55 key = kp[0]
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56 pat = kp[1]
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57 if key == 'include':
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58 includepats.add(pat)
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59 elif key == 'exclude':
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60 excludepats.add(pat)
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61 else:
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62 raise error.Abort(_('Invalid key "%s" in server response') % key)
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63
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64 return includepats, excludepats
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65
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66 def normalizesplitpattern(kind, pat):
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67 """Returns the normalized version of a pattern and kind.
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68
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69 Returns a tuple with the normalized kind and normalized pattern.
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70 """
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71 pat = pat.rstrip('/')
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72 _validatepattern(pat)
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73 return kind, pat
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74
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75 def _numlines(s):
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76 """Returns the number of lines in s, including ending empty lines."""
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77 # We use splitlines because it is Unicode-friendly and thus Python 3
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78 # compatible. However, it does not count empty lines at the end, so trick
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79 # it by adding a character at the end.
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80 return len((s + 'x').splitlines())
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81
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82 def _validatepattern(pat):
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83 """Validates the pattern and aborts if it is invalid.
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84
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85 Patterns are stored in the narrowspec as newline-separated
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86 POSIX-style bytestring paths. There's no escaping.
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87 """
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88
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89 # We use newlines as separators in the narrowspec file, so don't allow them
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90 # in patterns.
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91 if _numlines(pat) > 1:
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92 raise error.Abort(_('newlines are not allowed in narrowspec paths'))
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93
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94 components = pat.split('/')
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95 if '.' in components or '..' in components:
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96 raise error.Abort(_('"." and ".." are not allowed in narrowspec paths'))
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97
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98 def normalizepattern(pattern, defaultkind='path'):
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99 """Returns the normalized version of a text-format pattern.
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100
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101 If the pattern has no kind, the default will be added.
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102 """
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103 kind, pat = matchmod._patsplit(pattern, defaultkind)
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104 return '%s:%s' % normalizesplitpattern(kind, pat)
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105
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106 def parsepatterns(pats):
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107 """Parses a list of patterns into a typed pattern set."""
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108 return set(normalizepattern(p) for p in pats)
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109
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110 def format(includes, excludes):
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111 output = '[include]\n'
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112 for i in sorted(includes - excludes):
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113 output += i + '\n'
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114 output += '[exclude]\n'
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115 for e in sorted(excludes):
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116 output += e + '\n'
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117 return output
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118
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119 def match(root, include=None, exclude=None):
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120 if not include:
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121 # Passing empty include and empty exclude to matchmod.match()
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122 # gives a matcher that matches everything, so explicitly use
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123 # the nevermatcher.
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124 return matchmod.never(root, '')
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125 return matchmod.match(root, '', [], include=include or [],
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126 exclude=exclude or [])
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127
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128 def needsexpansion(includes):
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129 return [i for i in includes if i.startswith('include:')]
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130
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131 def load(repo):
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132 try:
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133 spec = repo.vfs.read(FILENAME)
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134 except IOError as e:
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135 # Treat "narrowspec does not exist" the same as "narrowspec file exists
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136 # and is empty".
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137 if e.errno == errno.ENOENT:
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138 # Without this the next call to load will use the cached
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139 # non-existence of the file, which can cause some odd issues.
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140 repo.invalidate(clearfilecache=True)
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141 return set(), set()
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142 raise
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143 # maybe we should care about the profiles returned too
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144 includepats, excludepats, profiles = sparse.parseconfig(repo.ui, spec,
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145 'narrow')
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146 if profiles:
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147 raise error.Abort(_("including other spec files using '%include' is not"
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148 " suported in narrowspec"))
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149 return includepats, excludepats
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150
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151 def save(repo, includepats, excludepats):
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152 spec = format(includepats, excludepats)
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153 repo.vfs.write(FILENAME, spec)
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154
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155 def savebackup(vfs, backupname):
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156 vfs.tryunlink(backupname)
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157 util.copyfile(vfs.join(FILENAME), vfs.join(backupname), hardlink=True)
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158
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159 def restorebackup(vfs, backupname):
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160 vfs.rename(backupname, FILENAME, checkambig=True)
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161
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162 def clearbackup(vfs, backupname):
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163 vfs.unlink(backupname)
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164
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165 def restrictpatterns(req_includes, req_excludes, repo_includes, repo_excludes):
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166 r""" Restricts the patterns according to repo settings,
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167 results in a logical AND operation
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168
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169 :param req_includes: requested includes
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170 :param req_excludes: requested excludes
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171 :param repo_includes: repo includes
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172 :param repo_excludes: repo excludes
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173 :return: include patterns, exclude patterns, and invalid include patterns.
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174
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175 >>> restrictpatterns({'f1','f2'}, {}, ['f1'], [])
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176 (set(['f1']), {}, [])
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177 >>> restrictpatterns({'f1'}, {}, ['f1','f2'], [])
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178 (set(['f1']), {}, [])
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179 >>> restrictpatterns({'f1/fc1', 'f3/fc3'}, {}, ['f1','f2'], [])
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180 (set(['f1/fc1']), {}, [])
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181 >>> restrictpatterns({'f1_fc1'}, {}, ['f1','f2'], [])
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182 ([], set(['path:.']), [])
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183 >>> restrictpatterns({'f1/../f2/fc2'}, {}, ['f1','f2'], [])
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184 (set(['f2/fc2']), {}, [])
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185 >>> restrictpatterns({'f1/../f3/fc3'}, {}, ['f1','f2'], [])
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186 ([], set(['path:.']), [])
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187 >>> restrictpatterns({'f1/$non_exitent_var'}, {}, ['f1','f2'], [])
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188 (set(['f1/$non_exitent_var']), {}, [])
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189 """
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190 res_excludes = set(req_excludes)
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191 res_excludes.update(repo_excludes)
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192 invalid_includes = []
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193 if not req_includes:
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194 res_includes = set(repo_includes)
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195 elif 'path:.' not in repo_includes:
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196 res_includes = []
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197 for req_include in req_includes:
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198 req_include = util.expandpath(util.normpath(req_include))
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199 if req_include in repo_includes:
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200 res_includes.append(req_include)
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201 continue
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202 valid = False
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203 for repo_include in repo_includes:
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204 if req_include.startswith(repo_include + '/'):
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205 valid = True
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206 res_includes.append(req_include)
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207 break
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208 if not valid:
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209 invalid_includes.append(req_include)
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210 if len(res_includes) == 0:
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211 res_excludes = {'path:.'}
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212 else:
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213 res_includes = set(res_includes)
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214 else:
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215 res_includes = set(req_includes)
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216 return res_includes, res_excludes, invalid_includes