Mercurial > hg
annotate mercurial/narrowspec.py @ 36439:02cd2fb6de72
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":<name>:" is automatically added by the registrar.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Sun, 25 Feb 2018 13:42:51 +0900 |
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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 hg, |
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16 match as matchmod, |
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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 = '[includes]\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 += '[excludes]\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 if repo.shared(): |
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133 repo = hg.sharedreposource(repo) |
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134 try: |
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135 spec = repo.vfs.read(FILENAME) |
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136 except IOError as e: |
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137 # Treat "narrowspec does not exist" the same as "narrowspec file exists |
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138 # and is empty". |
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139 if e.errno == errno.ENOENT: |
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140 # Without this the next call to load will use the cached |
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141 # non-existence of the file, which can cause some odd issues. |
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142 repo.invalidate(clearfilecache=True) |
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143 return set(), set() |
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144 raise |
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145 return _parsestoredpatterns(spec) |
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146 |
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147 def save(repo, includepats, excludepats): |
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148 spec = format(includepats, excludepats) |
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149 if repo.shared(): |
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150 repo = hg.sharedreposource(repo) |
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151 repo.vfs.write(FILENAME, spec) |
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152 |
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153 def restrictpatterns(req_includes, req_excludes, repo_includes, repo_excludes): |
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154 r""" Restricts the patterns according to repo settings, |
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155 results in a logical AND operation |
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156 |
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157 :param req_includes: requested includes |
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158 :param req_excludes: requested excludes |
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159 :param repo_includes: repo includes |
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160 :param repo_excludes: repo excludes |
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161 :return: include patterns, exclude patterns, and invalid include patterns. |
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162 |
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163 >>> restrictpatterns({'f1','f2'}, {}, ['f1'], []) |
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164 (set(['f1']), {}, []) |
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165 >>> restrictpatterns({'f1'}, {}, ['f1','f2'], []) |
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166 (set(['f1']), {}, []) |
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167 >>> restrictpatterns({'f1/fc1', 'f3/fc3'}, {}, ['f1','f2'], []) |
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168 (set(['f1/fc1']), {}, []) |
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169 >>> restrictpatterns({'f1_fc1'}, {}, ['f1','f2'], []) |
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170 ([], set(['path:.']), []) |
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171 >>> restrictpatterns({'f1/../f2/fc2'}, {}, ['f1','f2'], []) |
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172 (set(['f2/fc2']), {}, []) |
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173 >>> restrictpatterns({'f1/../f3/fc3'}, {}, ['f1','f2'], []) |
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174 ([], set(['path:.']), []) |
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175 >>> restrictpatterns({'f1/$non_exitent_var'}, {}, ['f1','f2'], []) |
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176 (set(['f1/$non_exitent_var']), {}, []) |
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177 """ |
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178 res_excludes = set(req_excludes) |
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179 res_excludes.update(repo_excludes) |
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180 invalid_includes = [] |
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181 if not req_includes: |
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182 res_includes = set(repo_includes) |
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183 elif 'path:.' not in repo_includes: |
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184 res_includes = [] |
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185 for req_include in req_includes: |
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186 req_include = util.expandpath(util.normpath(req_include)) |
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187 if req_include in repo_includes: |
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188 res_includes.append(req_include) |
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189 continue |
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190 valid = False |
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191 for repo_include in repo_includes: |
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192 if req_include.startswith(repo_include + '/'): |
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193 valid = True |
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194 res_includes.append(req_include) |
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195 break |
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196 if not valid: |
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197 invalid_includes.append(req_include) |
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198 if len(res_includes) == 0: |
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199 res_excludes = {'path:.'} |
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200 else: |
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201 res_includes = set(res_includes) |
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202 else: |
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203 res_includes = set(req_includes) |
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204 return res_includes, res_excludes, invalid_includes |