Mercurial > hg
annotate mercurial/narrowspec.py @ 50793:1fbae268ecae
wrapfunction: use sysstr instead of bytes as argument in "sqlitestore"
This is as valid and simpler, it will help us to eventually get ride of
`safehasattr`.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Fri, 03 Feb 2023 04:27:17 +0100 |
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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 import weakref |
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9 |
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10 from .i18n import _ |
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11 from .pycompat import getattr |
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12 from . import ( |
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13 error, |
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14 match as matchmod, |
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15 merge, |
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16 mergestate as mergestatemod, |
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17 scmutil, |
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18 sparse, |
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19 txnutil, |
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20 util, |
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21 ) |
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22 |
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23 # The file in .hg/store/ that indicates which paths exit in the store |
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24 FILENAME = b'narrowspec' |
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25 # The file in .hg/ that indicates which paths exit in the dirstate |
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26 DIRSTATE_FILENAME = b'narrowspec.dirstate' |
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27 |
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28 # Pattern prefixes that are allowed in narrow patterns. This list MUST |
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29 # only contain patterns that are fast and safe to evaluate. Keep in mind |
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30 # that patterns are supplied by clients and executed on remote servers |
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31 # as part of wire protocol commands. That means that changes to this |
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32 # data structure influence the wire protocol and should not be taken |
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33 # lightly - especially removals. |
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34 VALID_PREFIXES = ( |
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35 b'path:', |
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36 b'rootfilesin:', |
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37 ) |
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38 |
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39 |
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40 def normalizesplitpattern(kind, pat): |
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41 """Returns the normalized version of a pattern and kind. |
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42 |
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43 Returns a tuple with the normalized kind and normalized pattern. |
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44 """ |
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45 pat = pat.rstrip(b'/') |
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46 _validatepattern(pat) |
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47 return kind, pat |
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48 |
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49 |
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50 def _numlines(s): |
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51 """Returns the number of lines in s, including ending empty lines.""" |
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52 # We use splitlines because it is Unicode-friendly and thus Python 3 |
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53 # compatible. However, it does not count empty lines at the end, so trick |
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54 # it by adding a character at the end. |
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55 return len((s + b'x').splitlines()) |
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56 |
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57 |
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58 def _validatepattern(pat): |
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59 """Validates the pattern and aborts if it is invalid. |
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60 |
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61 Patterns are stored in the narrowspec as newline-separated |
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62 POSIX-style bytestring paths. There's no escaping. |
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63 """ |
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64 |
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65 # We use newlines as separators in the narrowspec file, so don't allow them |
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66 # in patterns. |
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67 if _numlines(pat) > 1: |
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68 raise error.Abort(_(b'newlines are not allowed in narrowspec paths')) |
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69 |
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70 components = pat.split(b'/') |
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71 if b'.' in components or b'..' in components: |
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72 raise error.Abort( |
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73 _(b'"." and ".." are not allowed in narrowspec paths') |
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74 ) |
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75 |
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76 |
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77 def normalizepattern(pattern, defaultkind=b'path'): |
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78 """Returns the normalized version of a text-format pattern. |
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79 |
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80 If the pattern has no kind, the default will be added. |
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81 """ |
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82 kind, pat = matchmod._patsplit(pattern, defaultkind) |
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83 return b'%s:%s' % normalizesplitpattern(kind, pat) |
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84 |
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85 |
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86 def parsepatterns(pats): |
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87 """Parses an iterable of patterns into a typed pattern set. |
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88 |
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89 Patterns are assumed to be ``path:`` if no prefix is present. |
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90 For safety and performance reasons, only some prefixes are allowed. |
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91 See ``validatepatterns()``. |
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92 |
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93 This function should be used on patterns that come from the user to |
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94 normalize and validate them to the internal data structure used for |
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95 representing patterns. |
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96 """ |
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97 res = {normalizepattern(orig) for orig in pats} |
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98 validatepatterns(res) |
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99 return res |
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100 |
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101 |
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102 def validatepatterns(pats): |
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103 """Validate that patterns are in the expected data structure and format. |
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104 |
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105 And that is a set of normalized patterns beginning with ``path:`` or |
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106 ``rootfilesin:``. |
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107 |
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108 This function should be used to validate internal data structures |
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109 and patterns that are loaded from sources that use the internal, |
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110 prefixed pattern representation (but can't necessarily be fully trusted). |
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111 """ |
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112 with util.timedcm('narrowspec.validatepatterns(pats size=%d)', len(pats)): |
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113 if not isinstance(pats, set): |
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114 raise error.ProgrammingError( |
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115 b'narrow patterns should be a set; got %r' % pats |
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116 ) |
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117 |
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118 for pat in pats: |
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119 if not pat.startswith(VALID_PREFIXES): |
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120 # Use a Mercurial exception because this can happen due to user |
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121 # bugs (e.g. manually updating spec file). |
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122 raise error.Abort( |
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123 _(b'invalid prefix on narrow pattern: %s') % pat, |
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124 hint=_( |
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125 b'narrow patterns must begin with one of ' |
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126 b'the following: %s' |
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127 ) |
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128 % b', '.join(VALID_PREFIXES), |
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129 ) |
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130 |
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131 |
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132 def format(includes, excludes): |
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133 output = b'[include]\n' |
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134 for i in sorted(includes - excludes): |
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135 output += i + b'\n' |
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136 output += b'[exclude]\n' |
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137 for e in sorted(excludes): |
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138 output += e + b'\n' |
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139 return output |
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140 |
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141 |
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142 def match(root, include=None, exclude=None): |
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143 if not include: |
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144 # Passing empty include and empty exclude to matchmod.match() |
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145 # gives a matcher that matches everything, so explicitly use |
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146 # the nevermatcher. |
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147 return matchmod.never() |
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148 return matchmod.match( |
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149 root, b'', [], include=include or [], exclude=exclude or [] |
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150 ) |
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151 |
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152 |
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153 def parseconfig(ui, spec): |
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154 # maybe we should care about the profiles returned too |
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155 includepats, excludepats, profiles = sparse.parseconfig(ui, spec, b'narrow') |
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156 if profiles: |
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157 raise error.Abort( |
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158 _( |
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159 b"including other spec files using '%include' is not" |
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160 b" supported in narrowspec" |
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161 ) |
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162 ) |
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163 |
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164 validatepatterns(includepats) |
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165 validatepatterns(excludepats) |
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166 |
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167 return includepats, excludepats |
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168 |
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169 |
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170 def load(repo): |
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171 # Treat "narrowspec does not exist" the same as "narrowspec file exists |
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172 # and is empty". |
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173 spec = None |
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174 if txnutil.mayhavepending(repo.root): |
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175 pending_path = b"%s.pending" % FILENAME |
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176 if repo.svfs.exists(pending_path): |
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177 spec = repo.svfs.tryread(FILENAME) |
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178 if spec is None: |
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179 spec = repo.svfs.tryread(FILENAME) |
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180 return parseconfig(repo.ui, spec) |
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181 |
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182 |
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183 def save(repo, includepats, excludepats): |
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184 repo = repo.unfiltered() |
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185 |
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186 validatepatterns(includepats) |
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187 validatepatterns(excludepats) |
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188 spec = format(includepats, excludepats) |
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189 |
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190 tr = repo.currenttransaction() |
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191 if tr is None: |
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192 m = "changing narrow spec outside of a transaction" |
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193 raise error.ProgrammingError(m) |
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194 else: |
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195 # the roundtrip is sometime different |
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196 # not taking any chance for now |
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197 value = parseconfig(repo.ui, spec) |
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198 reporef = weakref.ref(repo) |
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199 |
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200 def clean_pending(tr): |
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201 r = reporef() |
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202 if r is not None: |
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203 r._pending_narrow_pats = None |
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204 |
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205 tr.addpostclose(b'narrow-spec', clean_pending) |
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206 tr.addabort(b'narrow-spec', clean_pending) |
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207 repo._pending_narrow_pats = value |
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208 |
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209 def write_spec(f): |
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210 f.write(spec) |
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211 |
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212 tr.addfilegenerator( |
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213 # XXX think about order at some point |
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214 b"narrow-spec", |
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215 (FILENAME,), |
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216 write_spec, |
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217 location=b'store', |
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218 ) |
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219 |
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220 |
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221 def copytoworkingcopy(repo): |
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222 repo = repo.unfiltered() |
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223 tr = repo.currenttransaction() |
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224 spec = format(*repo.narrowpats) |
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225 if tr is None: |
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226 m = "changing narrow spec outside of a transaction" |
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227 raise error.ProgrammingError(m) |
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228 else: |
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229 |
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230 reporef = weakref.ref(repo) |
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231 |
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232 def clean_pending(tr): |
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233 r = reporef() |
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234 if r is not None: |
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235 r._pending_narrow_pats_dirstate = None |
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236 |
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237 tr.addpostclose(b'narrow-spec-dirstate', clean_pending) |
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238 tr.addabort(b'narrow-spec-dirstate', clean_pending) |
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239 repo._pending_narrow_pats_dirstate = repo.narrowpats |
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240 |
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241 def write_spec(f): |
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242 f.write(spec) |
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243 |
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244 tr.addfilegenerator( |
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245 # XXX think about order at some point |
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246 b"narrow-spec-dirstate", |
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247 (DIRSTATE_FILENAME,), |
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248 write_spec, |
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249 location=b'plain', |
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250 ) |
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251 |
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252 |
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253 def restrictpatterns(req_includes, req_excludes, repo_includes, repo_excludes): |
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254 r"""Restricts the patterns according to repo settings, |
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255 results in a logical AND operation |
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256 |
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257 :param req_includes: requested includes |
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258 :param req_excludes: requested excludes |
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259 :param repo_includes: repo includes |
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260 :param repo_excludes: repo excludes |
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261 :return: include patterns, exclude patterns, and invalid include patterns. |
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262 """ |
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263 res_excludes = set(req_excludes) |
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264 res_excludes.update(repo_excludes) |
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265 invalid_includes = [] |
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266 if not req_includes: |
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267 res_includes = set(repo_includes) |
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268 elif b'path:.' not in repo_includes: |
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269 res_includes = [] |
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270 for req_include in req_includes: |
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271 req_include = util.expandpath(util.normpath(req_include)) |
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272 if req_include in repo_includes: |
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273 res_includes.append(req_include) |
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274 continue |
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275 valid = False |
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276 for repo_include in repo_includes: |
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277 if req_include.startswith(repo_include + b'/'): |
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278 valid = True |
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279 res_includes.append(req_include) |
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280 break |
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281 if not valid: |
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282 invalid_includes.append(req_include) |
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283 if len(res_includes) == 0: |
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284 res_excludes = {b'path:.'} |
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285 else: |
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286 res_includes = set(res_includes) |
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287 else: |
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288 res_includes = set(req_includes) |
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289 return res_includes, res_excludes, invalid_includes |
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290 |
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291 |
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292 # These two are extracted for extensions (specifically for Google's CitC file |
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293 # system) |
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294 def _deletecleanfiles(repo, files): |
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295 for f in files: |
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296 repo.wvfs.unlinkpath(f) |
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297 |
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298 |
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299 def _writeaddedfiles(repo, pctx, files): |
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300 mresult = merge.mergeresult() |
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301 mf = repo[b'.'].manifest() |
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302 for f in files: |
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303 if not repo.wvfs.exists(f): |
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304 mresult.addfile( |
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305 f, |
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306 mergestatemod.ACTION_GET, |
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307 (mf.flags(f), False), |
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308 b"narrowspec updated", |
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309 ) |
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310 merge.applyupdates( |
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311 repo, |
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312 mresult, |
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313 wctx=repo[None], |
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314 mctx=repo[b'.'], |
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315 overwrite=False, |
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316 wantfiledata=False, |
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317 ) |
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318 |
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319 |
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320 def checkworkingcopynarrowspec(repo): |
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321 # Avoid infinite recursion when updating the working copy |
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322 if getattr(repo, '_updatingnarrowspec', False): |
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323 return |
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324 storespec = repo.narrowpats |
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325 wcspec = repo._pending_narrow_pats_dirstate |
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326 if wcspec is None: |
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327 oldspec = repo.vfs.tryread(DIRSTATE_FILENAME) |
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328 wcspec = parseconfig(repo.ui, oldspec) |
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329 if wcspec != storespec: |
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330 raise error.StateError( |
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331 _(b"working copy's narrowspec is stale"), |
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332 hint=_(b"run 'hg tracked --update-working-copy'"), |
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333 ) |
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334 |
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335 |
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336 def updateworkingcopy(repo, assumeclean=False): |
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337 """updates the working copy and dirstate from the store narrowspec |
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338 |
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339 When assumeclean=True, files that are not known to be clean will also |
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340 be deleted. It is then up to the caller to make sure they are clean. |
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341 """ |
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342 old = repo._pending_narrow_pats_dirstate |
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343 if old is None: |
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344 oldspec = repo.vfs.tryread(DIRSTATE_FILENAME) |
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345 oldincludes, oldexcludes = parseconfig(repo.ui, oldspec) |
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346 else: |
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347 oldincludes, oldexcludes = old |
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348 newincludes, newexcludes = repo.narrowpats |
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349 repo._updatingnarrowspec = True |
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350 |
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351 oldmatch = match(repo.root, include=oldincludes, exclude=oldexcludes) |
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352 newmatch = match(repo.root, include=newincludes, exclude=newexcludes) |
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353 addedmatch = matchmod.differencematcher(newmatch, oldmatch) |
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354 removedmatch = matchmod.differencematcher(oldmatch, newmatch) |
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355 |
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356 assert repo.currentwlock() is not None |
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357 ds = repo.dirstate |
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358 with ds.running_status(repo): |
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359 lookup, status, _mtime_boundary = ds.status( |
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360 removedmatch, |
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361 subrepos=[], |
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362 ignored=True, |
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363 clean=True, |
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364 unknown=True, |
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365 ) |
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366 trackeddirty = status.modified + status.added |
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367 clean = status.clean |
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368 if assumeclean: |
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369 clean.extend(lookup) |
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370 else: |
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371 trackeddirty.extend(lookup) |
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372 _deletecleanfiles(repo, clean) |
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373 uipathfn = scmutil.getuipathfn(repo) |
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374 for f in sorted(trackeddirty): |
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375 repo.ui.status( |
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376 _(b'not deleting possibly dirty file %s\n') % uipathfn(f) |
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377 ) |
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378 for f in sorted(status.unknown): |
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379 repo.ui.status(_(b'not deleting unknown file %s\n') % uipathfn(f)) |
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380 for f in sorted(status.ignored): |
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381 repo.ui.status(_(b'not deleting ignored file %s\n') % uipathfn(f)) |
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382 for f in clean + trackeddirty: |
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383 ds.update_file(f, p1_tracked=False, wc_tracked=False) |
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384 |
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385 pctx = repo[b'.'] |
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386 |
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387 # only update added files that are in the sparse checkout |
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388 addedmatch = matchmod.intersectmatchers(addedmatch, sparse.matcher(repo)) |
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389 newfiles = [f for f in pctx.manifest().walk(addedmatch) if f not in ds] |
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390 for f in newfiles: |
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391 ds.update_file(f, p1_tracked=True, wc_tracked=True, possibly_dirty=True) |
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392 _writeaddedfiles(repo, pctx, newfiles) |
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393 repo._updatingnarrowspec = False |