Mercurial > hg
annotate mercurial/narrowspec.py @ 39620:b220851999b5
py3: use '%d' for integers instead of '%s'
Differential Revision: https://phab.mercurial-scm.org/D4593
author | Pulkit Goyal <pulkit@yandex-team.ru> |
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date | Sat, 15 Sep 2018 00:24:05 +0300 |
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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 repository, |
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17 sparse, |
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18 util, |
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19 ) |
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20 |
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21 FILENAME = 'narrowspec' |
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22 |
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23 # Pattern prefixes that are allowed in narrow patterns. This list MUST |
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24 # only contain patterns that are fast and safe to evaluate. Keep in mind |
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25 # that patterns are supplied by clients and executed on remote servers |
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26 # as part of wire protocol commands. |
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27 VALID_PREFIXES = ( |
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28 b'path:', |
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29 b'rootfilesin:', |
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30 ) |
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31 |
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32 def normalizesplitpattern(kind, pat): |
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33 """Returns the normalized version of a pattern and kind. |
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34 |
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35 Returns a tuple with the normalized kind and normalized pattern. |
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36 """ |
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37 pat = pat.rstrip('/') |
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38 _validatepattern(pat) |
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39 return kind, pat |
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40 |
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41 def _numlines(s): |
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42 """Returns the number of lines in s, including ending empty lines.""" |
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43 # We use splitlines because it is Unicode-friendly and thus Python 3 |
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44 # compatible. However, it does not count empty lines at the end, so trick |
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45 # it by adding a character at the end. |
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46 return len((s + 'x').splitlines()) |
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47 |
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48 def _validatepattern(pat): |
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49 """Validates the pattern and aborts if it is invalid. |
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50 |
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51 Patterns are stored in the narrowspec as newline-separated |
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52 POSIX-style bytestring paths. There's no escaping. |
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53 """ |
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54 |
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55 # We use newlines as separators in the narrowspec file, so don't allow them |
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56 # in patterns. |
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57 if _numlines(pat) > 1: |
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58 raise error.Abort(_('newlines are not allowed in narrowspec paths')) |
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59 |
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60 components = pat.split('/') |
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61 if '.' in components or '..' in components: |
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62 raise error.Abort(_('"." and ".." are not allowed in narrowspec paths')) |
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63 |
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64 def normalizepattern(pattern, defaultkind='path'): |
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65 """Returns the normalized version of a text-format pattern. |
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66 |
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67 If the pattern has no kind, the default will be added. |
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68 """ |
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69 kind, pat = matchmod._patsplit(pattern, defaultkind) |
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70 return '%s:%s' % normalizesplitpattern(kind, pat) |
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71 |
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72 def parsepatterns(pats): |
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73 """Parses an iterable of patterns into a typed pattern set. |
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74 |
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75 Patterns are assumed to be ``path:`` if no prefix is present. |
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76 For safety and performance reasons, only some prefixes are allowed. |
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77 See ``validatepatterns()``. |
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78 |
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79 This function should be used on patterns that come from the user to |
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80 normalize and validate them to the internal data structure used for |
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81 representing patterns. |
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82 """ |
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83 res = {normalizepattern(orig) for orig in pats} |
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84 validatepatterns(res) |
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85 return res |
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86 |
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87 def validatepatterns(pats): |
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88 """Validate that patterns are in the expected data structure and format. |
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89 |
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90 And that is a set of normalized patterns beginning with ``path:`` or |
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91 ``rootfilesin:``. |
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92 |
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93 This function should be used to validate internal data structures |
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94 and patterns that are loaded from sources that use the internal, |
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95 prefixed pattern representation (but can't necessarily be fully trusted). |
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96 """ |
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97 if not isinstance(pats, set): |
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98 raise error.ProgrammingError('narrow patterns should be a set; ' |
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99 'got %r' % pats) |
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100 |
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101 for pat in pats: |
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102 if not pat.startswith(VALID_PREFIXES): |
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103 # Use a Mercurial exception because this can happen due to user |
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104 # bugs (e.g. manually updating spec file). |
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105 raise error.Abort(_('invalid prefix on narrow pattern: %s') % pat, |
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106 hint=_('narrow patterns must begin with one of ' |
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107 'the following: %s') % |
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108 ', '.join(VALID_PREFIXES)) |
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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 load(repo): |
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129 try: |
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130 spec = repo.svfs.read(FILENAME) |
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131 except IOError as e: |
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132 # Treat "narrowspec does not exist" the same as "narrowspec file exists |
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133 # and is empty". |
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134 if e.errno == errno.ENOENT: |
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135 return set(), set() |
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136 raise |
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137 # maybe we should care about the profiles returned too |
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138 includepats, excludepats, profiles = sparse.parseconfig(repo.ui, spec, |
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139 'narrow') |
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140 if profiles: |
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141 raise error.Abort(_("including other spec files using '%include' is not" |
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142 " supported in narrowspec")) |
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143 |
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144 validatepatterns(includepats) |
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145 validatepatterns(excludepats) |
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146 |
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147 return includepats, excludepats |
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148 |
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149 def save(repo, includepats, excludepats): |
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150 validatepatterns(includepats) |
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151 validatepatterns(excludepats) |
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152 spec = format(includepats, excludepats) |
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153 repo.svfs.write(FILENAME, spec) |
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154 |
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155 def savebackup(repo, backupname): |
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156 if repository.NARROW_REQUIREMENT not in repo.requirements: |
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157 return |
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158 vfs = repo.vfs |
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159 vfs.tryunlink(backupname) |
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160 util.copyfile(repo.svfs.join(FILENAME), vfs.join(backupname), hardlink=True) |
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161 |
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162 def restorebackup(repo, backupname): |
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163 if repository.NARROW_REQUIREMENT not in repo.requirements: |
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164 return |
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165 util.rename(repo.vfs.join(backupname), repo.svfs.join(FILENAME)) |
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166 |
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167 def clearbackup(repo, backupname): |
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168 if repository.NARROW_REQUIREMENT not in repo.requirements: |
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169 return |
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170 repo.vfs.unlink(backupname) |
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171 |
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172 def restrictpatterns(req_includes, req_excludes, repo_includes, repo_excludes): |
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173 r""" Restricts the patterns according to repo settings, |
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174 results in a logical AND operation |
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175 |
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176 :param req_includes: requested includes |
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177 :param req_excludes: requested excludes |
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178 :param repo_includes: repo includes |
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179 :param repo_excludes: repo excludes |
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180 :return: include patterns, exclude patterns, and invalid include patterns. |
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181 |
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182 >>> restrictpatterns({'f1','f2'}, {}, ['f1'], []) |
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183 (set(['f1']), {}, []) |
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184 >>> restrictpatterns({'f1'}, {}, ['f1','f2'], []) |
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185 (set(['f1']), {}, []) |
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186 >>> restrictpatterns({'f1/fc1', 'f3/fc3'}, {}, ['f1','f2'], []) |
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187 (set(['f1/fc1']), {}, []) |
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188 >>> restrictpatterns({'f1_fc1'}, {}, ['f1','f2'], []) |
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189 ([], set(['path:.']), []) |
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190 >>> restrictpatterns({'f1/../f2/fc2'}, {}, ['f1','f2'], []) |
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191 (set(['f2/fc2']), {}, []) |
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192 >>> restrictpatterns({'f1/../f3/fc3'}, {}, ['f1','f2'], []) |
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193 ([], set(['path:.']), []) |
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194 >>> restrictpatterns({'f1/$non_exitent_var'}, {}, ['f1','f2'], []) |
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195 (set(['f1/$non_exitent_var']), {}, []) |
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196 """ |
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197 res_excludes = set(req_excludes) |
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198 res_excludes.update(repo_excludes) |
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199 invalid_includes = [] |
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200 if not req_includes: |
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201 res_includes = set(repo_includes) |
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202 elif 'path:.' not in repo_includes: |
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203 res_includes = [] |
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204 for req_include in req_includes: |
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205 req_include = util.expandpath(util.normpath(req_include)) |
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206 if req_include in repo_includes: |
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207 res_includes.append(req_include) |
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208 continue |
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209 valid = False |
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210 for repo_include in repo_includes: |
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211 if req_include.startswith(repo_include + '/'): |
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212 valid = True |
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213 res_includes.append(req_include) |
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214 break |
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215 if not valid: |
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parents:
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216 invalid_includes.append(req_include) |
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217 if len(res_includes) == 0: |
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218 res_excludes = {'path:.'} |
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219 else: |
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220 res_includes = set(res_includes) |
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221 else: |
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222 res_includes = set(req_includes) |
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223 return res_includes, res_excludes, invalid_includes |