Mercurial > hg
annotate hgext/sparse.py @ 33371:c6415195fa78
sparse: move code for importing rules from files into core
This is a pretty straightforward port. Some code cleanup was
performed. But no major changes to the logic were made.
I'm not a huge fan of this function because it does multiple
things. I'd like to get things into core first to facilitate
refactoring later.
Please also note the added inline comment about the oddities
of writeconfig() and the try..except to undo it. This is because
of the hackiness in which the sparse matcher is obtained by
various consumers, notably dirstate. We'll need a massive
refactor to address this. That refactor is effectively blocked
on having the sparse dirstate hacks live in core.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sat, 08 Jul 2017 14:15:07 -0700 |
parents | 482320104672 |
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1 # sparse.py - allow sparse checkouts of the working directory |
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2 # |
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3 # Copyright 2014 Facebook, 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 """allow sparse checkouts of the working directory (EXPERIMENTAL) |
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9 |
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10 (This extension is not yet protected by backwards compatibility |
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11 guarantees. Any aspect may break in future releases until this |
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12 notice is removed.) |
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13 |
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14 This extension allows the working directory to only consist of a |
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15 subset of files for the revision. This allows specific files or |
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16 directories to be explicitly included or excluded. Many repository |
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17 operations have performance proportional to the number of files in |
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18 the working directory. So only realizing a subset of files in the |
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19 working directory can improve performance. |
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20 |
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21 Sparse Config Files |
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22 ------------------- |
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23 |
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24 The set of files that are part of a sparse checkout are defined by |
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25 a sparse config file. The file defines 3 things: includes (files to |
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26 include in the sparse checkout), excludes (files to exclude from the |
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27 sparse checkout), and profiles (links to other config files). |
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28 |
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29 The file format is newline delimited. Empty lines and lines beginning |
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30 with ``#`` are ignored. |
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31 |
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32 Lines beginning with ``%include `` denote another sparse config file |
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33 to include. e.g. ``%include tests.sparse``. The filename is relative |
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34 to the repository root. |
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35 |
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36 The special lines ``[include]`` and ``[exclude]`` denote the section |
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37 for includes and excludes that follow, respectively. It is illegal to |
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38 have ``[include]`` after ``[exclude]``. If no sections are defined, |
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39 entries are assumed to be in the ``[include]`` section. |
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40 |
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41 Non-special lines resemble file patterns to be added to either includes |
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42 or excludes. The syntax of these lines is documented by :hg:`help patterns`. |
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43 Patterns are interpreted as ``glob:`` by default and match against the |
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44 root of the repository. |
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45 |
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46 Exclusion patterns take precedence over inclusion patterns. So even |
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47 if a file is explicitly included, an ``[exclude]`` entry can remove it. |
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48 |
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49 For example, say you have a repository with 3 directories, ``frontend/``, |
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50 ``backend/``, and ``tools/``. ``frontend/`` and ``backend/`` correspond |
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51 to different projects and it is uncommon for someone working on one |
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52 to need the files for the other. But ``tools/`` contains files shared |
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53 between both projects. Your sparse config files may resemble:: |
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54 |
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55 # frontend.sparse |
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56 frontend/** |
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57 tools/** |
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58 |
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59 # backend.sparse |
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60 backend/** |
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61 tools/** |
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62 |
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63 Say the backend grows in size. Or there's a directory with thousands |
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64 of files you wish to exclude. You can modify the profile to exclude |
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65 certain files:: |
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66 |
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67 [include] |
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68 backend/** |
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69 tools/** |
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70 |
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71 [exclude] |
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72 tools/tests/** |
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73 """ |
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74 |
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75 from __future__ import absolute_import |
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76 |
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77 from mercurial.i18n import _ |
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78 from mercurial import ( |
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79 cmdutil, |
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80 commands, |
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81 dirstate, |
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82 error, |
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83 extensions, |
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84 hg, |
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85 localrepo, |
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86 match as matchmod, |
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87 registrar, |
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88 sparse, |
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89 util, |
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90 ) |
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91 |
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92 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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93 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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94 # be specifying the version(s) of Mercurial they are tested with, or |
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95 # leave the attribute unspecified. |
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96 testedwith = 'ships-with-hg-core' |
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97 |
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98 cmdtable = {} |
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99 command = registrar.command(cmdtable) |
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100 |
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101 def extsetup(ui): |
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102 sparse.enabled = True |
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103 |
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104 _setupclone(ui) |
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105 _setuplog(ui) |
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106 _setupadd(ui) |
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107 _setupdirstate(ui) |
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108 |
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109 def reposetup(ui, repo): |
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110 if not util.safehasattr(repo, 'dirstate'): |
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111 return |
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112 |
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113 if 'dirstate' in repo._filecache: |
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114 repo.dirstate.repo = repo |
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115 |
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116 def replacefilecache(cls, propname, replacement): |
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117 """Replace a filecache property with a new class. This allows changing the |
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118 cache invalidation condition.""" |
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119 origcls = cls |
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120 assert callable(replacement) |
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121 while cls is not object: |
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122 if propname in cls.__dict__: |
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123 orig = cls.__dict__[propname] |
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124 setattr(cls, propname, replacement(orig)) |
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125 break |
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126 cls = cls.__bases__[0] |
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127 |
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128 if cls is object: |
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129 raise AttributeError(_("type '%s' has no property '%s'") % (origcls, |
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130 propname)) |
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131 |
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132 def _setuplog(ui): |
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133 entry = commands.table['^log|history'] |
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134 entry[1].append(('', 'sparse', None, |
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135 "limit to changesets affecting the sparse checkout")) |
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136 |
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137 def _logrevs(orig, repo, opts): |
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138 revs = orig(repo, opts) |
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139 if opts.get('sparse'): |
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140 sparsematch = sparse.matcher(repo) |
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141 def ctxmatch(rev): |
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142 ctx = repo[rev] |
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143 return any(f for f in ctx.files() if sparsematch(f)) |
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144 revs = revs.filter(ctxmatch) |
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145 return revs |
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146 extensions.wrapfunction(cmdutil, '_logrevs', _logrevs) |
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147 |
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148 def _clonesparsecmd(orig, ui, repo, *args, **opts): |
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149 include_pat = opts.get('include') |
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150 exclude_pat = opts.get('exclude') |
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151 enableprofile_pat = opts.get('enable_profile') |
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152 include = exclude = enableprofile = False |
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153 if include_pat: |
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154 pat = include_pat |
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155 include = True |
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156 if exclude_pat: |
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157 pat = exclude_pat |
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158 exclude = True |
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159 if enableprofile_pat: |
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160 pat = enableprofile_pat |
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161 enableprofile = True |
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162 if sum([include, exclude, enableprofile]) > 1: |
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163 raise error.Abort(_("too many flags specified.")) |
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164 if include or exclude or enableprofile: |
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165 def clonesparse(orig, self, node, overwrite, *args, **kwargs): |
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166 _config(self.ui, self.unfiltered(), pat, {}, include=include, |
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167 exclude=exclude, enableprofile=enableprofile) |
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168 return orig(self, node, overwrite, *args, **kwargs) |
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169 extensions.wrapfunction(hg, 'updaterepo', clonesparse) |
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170 return orig(ui, repo, *args, **opts) |
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171 |
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172 def _setupclone(ui): |
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173 entry = commands.table['^clone'] |
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174 entry[1].append(('', 'enable-profile', [], |
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175 'enable a sparse profile')) |
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176 entry[1].append(('', 'include', [], |
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177 'include sparse pattern')) |
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178 entry[1].append(('', 'exclude', [], |
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179 'exclude sparse pattern')) |
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180 extensions.wrapcommand(commands.table, 'clone', _clonesparsecmd) |
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181 |
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182 def _setupadd(ui): |
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183 entry = commands.table['^add'] |
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184 entry[1].append(('s', 'sparse', None, |
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185 'also include directories of added files in sparse config')) |
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186 |
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187 def _add(orig, ui, repo, *pats, **opts): |
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188 if opts.get('sparse'): |
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189 dirs = set() |
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190 for pat in pats: |
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191 dirname, basename = util.split(pat) |
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192 dirs.add(dirname) |
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193 _config(ui, repo, list(dirs), opts, include=True) |
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194 return orig(ui, repo, *pats, **opts) |
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195 |
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196 extensions.wrapcommand(commands.table, 'add', _add) |
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197 |
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198 def _setupdirstate(ui): |
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199 """Modify the dirstate to prevent stat'ing excluded files, |
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200 and to prevent modifications to files outside the checkout. |
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201 """ |
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202 |
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203 def _dirstate(orig, repo): |
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204 dirstate = orig(repo) |
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205 dirstate.repo = repo |
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206 return dirstate |
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207 extensions.wrapfunction( |
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208 localrepo.localrepository.dirstate, 'func', _dirstate) |
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209 |
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210 # The atrocity below is needed to wrap dirstate._ignore. It is a cached |
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211 # property, which means normal function wrapping doesn't work. |
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212 class ignorewrapper(object): |
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213 def __init__(self, orig): |
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214 self.orig = orig |
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215 self.origignore = None |
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216 self.func = None |
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217 self.sparsematch = None |
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218 |
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219 def __get__(self, obj, type=None): |
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220 repo = obj.repo |
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221 origignore = self.orig.__get__(obj) |
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222 |
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223 sparsematch = sparse.matcher(repo) |
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224 if sparsematch.always(): |
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225 return origignore |
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226 |
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227 if self.sparsematch != sparsematch or self.origignore != origignore: |
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228 self.func = matchmod.unionmatcher([ |
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229 origignore, matchmod.negatematcher(sparsematch)]) |
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230 self.sparsematch = sparsematch |
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231 self.origignore = origignore |
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232 return self.func |
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233 |
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234 def __set__(self, obj, value): |
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235 return self.orig.__set__(obj, value) |
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236 |
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237 def __delete__(self, obj): |
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238 return self.orig.__delete__(obj) |
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239 |
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240 replacefilecache(dirstate.dirstate, '_ignore', ignorewrapper) |
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241 |
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242 # dirstate.rebuild should not add non-matching files |
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243 def _rebuild(orig, self, parent, allfiles, changedfiles=None): |
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244 matcher = sparse.matcher(self.repo) |
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245 if not matcher.always(): |
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246 allfiles = allfiles.matches(matcher) |
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247 if changedfiles: |
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248 changedfiles = [f for f in changedfiles if matcher(f)] |
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249 |
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250 if changedfiles is not None: |
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251 # In _rebuild, these files will be deleted from the dirstate |
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252 # when they are not found to be in allfiles |
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253 dirstatefilestoremove = set(f for f in self if not matcher(f)) |
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254 changedfiles = dirstatefilestoremove.union(changedfiles) |
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255 |
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256 return orig(self, parent, allfiles, changedfiles) |
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257 extensions.wrapfunction(dirstate.dirstate, 'rebuild', _rebuild) |
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258 |
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259 # Prevent adding files that are outside the sparse checkout |
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260 editfuncs = ['normal', 'add', 'normallookup', 'copy', 'remove', 'merge'] |
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261 hint = _('include file with `hg debugsparse --include <pattern>` or use ' + |
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262 '`hg add -s <file>` to include file directory while adding') |
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263 for func in editfuncs: |
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264 def _wrapper(orig, self, *args): |
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265 repo = self.repo |
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266 sparsematch = sparse.matcher(repo) |
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267 if not sparsematch.always(): |
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268 dirstate = repo.dirstate |
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269 for f in args: |
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270 if (f is not None and not sparsematch(f) and |
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271 f not in dirstate): |
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272 raise error.Abort(_("cannot add '%s' - it is outside " |
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273 "the sparse checkout") % f, |
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274 hint=hint) |
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275 return orig(self, *args) |
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276 extensions.wrapfunction(dirstate.dirstate, func, _wrapper) |
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277 |
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278 @command('^debugsparse', [ |
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279 ('I', 'include', False, _('include files in the sparse checkout')), |
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280 ('X', 'exclude', False, _('exclude files in the sparse checkout')), |
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281 ('d', 'delete', False, _('delete an include/exclude rule')), |
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282 ('f', 'force', False, _('allow changing rules even with pending changes')), |
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283 ('', 'enable-profile', False, _('enables the specified profile')), |
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284 ('', 'disable-profile', False, _('disables the specified profile')), |
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285 ('', 'import-rules', False, _('imports rules from a file')), |
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286 ('', 'clear-rules', False, _('clears local include/exclude rules')), |
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287 ('', 'refresh', False, _('updates the working after sparseness changes')), |
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288 ('', 'reset', False, _('makes the repo full again')), |
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289 ] + commands.templateopts, |
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290 _('[--OPTION] PATTERN...')) |
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291 def debugsparse(ui, repo, *pats, **opts): |
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292 """make the current checkout sparse, or edit the existing checkout |
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293 |
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294 The sparse command is used to make the current checkout sparse. |
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295 This means files that don't meet the sparse condition will not be |
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296 written to disk, or show up in any working copy operations. It does |
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297 not affect files in history in any way. |
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298 |
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299 Passing no arguments prints the currently applied sparse rules. |
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300 |
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301 --include and --exclude are used to add and remove files from the sparse |
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302 checkout. The effects of adding an include or exclude rule are applied |
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303 immediately. If applying the new rule would cause a file with pending |
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304 changes to be added or removed, the command will fail. Pass --force to |
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305 force a rule change even with pending changes (the changes on disk will |
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306 be preserved). |
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307 |
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308 --delete removes an existing include/exclude rule. The effects are |
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309 immediate. |
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310 |
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311 --refresh refreshes the files on disk based on the sparse rules. This is |
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312 only necessary if .hg/sparse was changed by hand. |
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313 |
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314 --enable-profile and --disable-profile accept a path to a .hgsparse file. |
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315 This allows defining sparse checkouts and tracking them inside the |
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316 repository. This is useful for defining commonly used sparse checkouts for |
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317 many people to use. As the profile definition changes over time, the sparse |
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318 checkout will automatically be updated appropriately, depending on which |
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319 changeset is checked out. Changes to .hgsparse are not applied until they |
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320 have been committed. |
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321 |
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322 --import-rules accepts a path to a file containing rules in the .hgsparse |
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323 format, allowing you to add --include, --exclude and --enable-profile rules |
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324 in bulk. Like the --include, --exclude and --enable-profile switches, the |
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325 changes are applied immediately. |
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326 |
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327 --clear-rules removes all local include and exclude rules, while leaving |
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328 any enabled profiles in place. |
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329 |
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330 Returns 0 if editing the sparse checkout succeeds. |
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331 """ |
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332 include = opts.get('include') |
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333 exclude = opts.get('exclude') |
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334 force = opts.get('force') |
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335 enableprofile = opts.get('enable_profile') |
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336 disableprofile = opts.get('disable_profile') |
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337 importrules = opts.get('import_rules') |
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338 clearrules = opts.get('clear_rules') |
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339 delete = opts.get('delete') |
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340 refresh = opts.get('refresh') |
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341 reset = opts.get('reset') |
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342 count = sum([include, exclude, enableprofile, disableprofile, delete, |
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343 importrules, refresh, clearrules, reset]) |
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344 if count > 1: |
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345 raise error.Abort(_("too many flags specified")) |
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346 |
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347 if count == 0: |
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348 if repo.vfs.exists('sparse'): |
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349 ui.status(repo.vfs.read("sparse") + "\n") |
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350 temporaryincludes = sparse.readtemporaryincludes(repo) |
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351 if temporaryincludes: |
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352 ui.status(_("Temporarily Included Files (for merge/rebase):\n")) |
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353 ui.status(("\n".join(temporaryincludes) + "\n")) |
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354 else: |
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355 ui.status(_('repo is not sparse\n')) |
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356 return |
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357 |
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358 if include or exclude or delete or reset or enableprofile or disableprofile: |
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359 _config(ui, repo, pats, opts, include=include, exclude=exclude, |
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360 reset=reset, delete=delete, enableprofile=enableprofile, |
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361 disableprofile=disableprofile, force=force) |
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362 |
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363 if importrules: |
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364 sparse.importfromfiles(repo, opts, pats, force=force) |
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365 |
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366 if clearrules: |
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367 sparse.clearrules(repo, force=force) |
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368 |
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369 if refresh: |
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370 try: |
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371 wlock = repo.wlock() |
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372 fcounts = map( |
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373 len, |
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374 sparse.refreshwdir(repo, repo.status(), sparse.matcher(repo), |
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375 force=force)) |
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376 sparse.printchanges(ui, opts, added=fcounts[0], dropped=fcounts[1], |
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377 conflicting=fcounts[2]) |
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378 finally: |
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379 wlock.release() |
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380 |
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381 def _config(ui, repo, pats, opts, include=False, exclude=False, reset=False, |
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382 delete=False, enableprofile=False, disableprofile=False, |
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383 force=False): |
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384 """ |
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385 Perform a sparse config update. Only one of the kwargs may be specified. |
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386 """ |
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387 wlock = repo.wlock() |
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388 try: |
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389 oldsparsematch = sparse.matcher(repo) |
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390 |
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391 raw = repo.vfs.tryread('sparse') |
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392 if raw: |
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393 oldinclude, oldexclude, oldprofiles = map( |
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394 set, sparse.parseconfig(ui, raw)) |
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395 else: |
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396 oldinclude = set() |
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397 oldexclude = set() |
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398 oldprofiles = set() |
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399 |
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400 try: |
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401 if reset: |
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402 newinclude = set() |
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403 newexclude = set() |
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404 newprofiles = set() |
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405 else: |
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406 newinclude = set(oldinclude) |
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407 newexclude = set(oldexclude) |
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408 newprofiles = set(oldprofiles) |
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409 |
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410 oldstatus = repo.status() |
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411 |
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412 if any(pat.startswith('/') for pat in pats): |
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413 ui.warn(_('warning: paths cannot start with /, ignoring: %s\n') |
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414 % ([pat for pat in pats if pat.startswith('/')])) |
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415 elif include: |
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416 newinclude.update(pats) |
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417 elif exclude: |
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418 newexclude.update(pats) |
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419 elif enableprofile: |
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420 newprofiles.update(pats) |
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421 elif disableprofile: |
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422 newprofiles.difference_update(pats) |
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423 elif delete: |
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424 newinclude.difference_update(pats) |
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425 newexclude.difference_update(pats) |
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426 |
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427 sparse.writeconfig(repo, newinclude, newexclude, newprofiles) |
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428 |
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429 fcounts = map( |
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430 len, |
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431 sparse.refreshwdir(repo, oldstatus, oldsparsematch, |
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432 force=force)) |
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433 |
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434 profilecount = (len(newprofiles - oldprofiles) - |
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435 len(oldprofiles - newprofiles)) |
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436 includecount = (len(newinclude - oldinclude) - |
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437 len(oldinclude - newinclude)) |
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438 excludecount = (len(newexclude - oldexclude) - |
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439 len(oldexclude - newexclude)) |
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440 sparse.printchanges(ui, opts, profilecount, includecount, |
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441 excludecount, *fcounts) |
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442 except Exception: |
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443 sparse.writeconfig(repo, oldinclude, oldexclude, oldprofiles) |
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444 raise |
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445 finally: |
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446 wlock.release() |