Mercurial > hg
annotate hgext/sparse.py @ 36487:dabf86721200
sshpeer: factor out code for creating peers from pipes
An upcoming commit will want to instantiate an SSH peer via
an alternate mechanism that doesn't require running a new
`ssh` command. To facilitate that, we extract the code for
creating a peer from pipes to its own function.
Differential Revision: https://phab.mercurial-scm.org/D2391
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sun, 25 Feb 2018 11:00:53 -0800 |
parents | deb851914fd7 |
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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]``. |
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39 |
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40 Non-special lines resemble file patterns to be added to either includes |
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41 or excludes. The syntax of these lines is documented by :hg:`help patterns`. |
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42 Patterns are interpreted as ``glob:`` by default and match against the |
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43 root of the repository. |
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44 |
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45 Exclusion patterns take precedence over inclusion patterns. So even |
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46 if a file is explicitly included, an ``[exclude]`` entry can remove it. |
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47 |
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48 For example, say you have a repository with 3 directories, ``frontend/``, |
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49 ``backend/``, and ``tools/``. ``frontend/`` and ``backend/`` correspond |
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50 to different projects and it is uncommon for someone working on one |
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51 to need the files for the other. But ``tools/`` contains files shared |
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52 between both projects. Your sparse config files may resemble:: |
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53 |
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54 # frontend.sparse |
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55 frontend/** |
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56 tools/** |
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57 |
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58 # backend.sparse |
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59 backend/** |
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60 tools/** |
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61 |
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62 Say the backend grows in size. Or there's a directory with thousands |
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63 of files you wish to exclude. You can modify the profile to exclude |
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64 certain files:: |
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65 |
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66 [include] |
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67 backend/** |
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68 tools/** |
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69 |
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70 [exclude] |
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71 tools/tests/** |
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72 """ |
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73 |
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74 from __future__ import absolute_import |
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75 |
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76 from mercurial.i18n import _ |
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77 from mercurial import ( |
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78 commands, |
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79 dirstate, |
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80 error, |
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81 extensions, |
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82 hg, |
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83 logcmdutil, |
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84 match as matchmod, |
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85 pycompat, |
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86 registrar, |
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87 sparse, |
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88 util, |
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89 ) |
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90 |
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91 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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92 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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93 # be specifying the version(s) of Mercurial they are tested with, or |
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94 # leave the attribute unspecified. |
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95 testedwith = 'ships-with-hg-core' |
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96 |
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97 cmdtable = {} |
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98 command = registrar.command(cmdtable) |
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99 |
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100 def extsetup(ui): |
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101 sparse.enabled = True |
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102 |
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103 _setupclone(ui) |
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104 _setuplog(ui) |
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105 _setupadd(ui) |
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106 _setupdirstate(ui) |
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107 |
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108 def replacefilecache(cls, propname, replacement): |
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109 """Replace a filecache property with a new class. This allows changing the |
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110 cache invalidation condition.""" |
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111 origcls = cls |
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112 assert callable(replacement) |
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113 while cls is not object: |
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114 if propname in cls.__dict__: |
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115 orig = cls.__dict__[propname] |
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116 setattr(cls, propname, replacement(orig)) |
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117 break |
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118 cls = cls.__bases__[0] |
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119 |
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120 if cls is object: |
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121 raise AttributeError(_("type '%s' has no property '%s'") % (origcls, |
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122 propname)) |
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123 |
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124 def _setuplog(ui): |
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125 entry = commands.table['^log|history'] |
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126 entry[1].append(('', 'sparse', None, |
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127 "limit to changesets affecting the sparse checkout")) |
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128 |
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129 def _initialrevs(orig, repo, opts): |
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130 revs = orig(repo, opts) |
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131 if opts.get('sparse'): |
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132 sparsematch = sparse.matcher(repo) |
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133 def ctxmatch(rev): |
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134 ctx = repo[rev] |
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135 return any(f for f in ctx.files() if sparsematch(f)) |
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136 revs = revs.filter(ctxmatch) |
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137 return revs |
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138 extensions.wrapfunction(logcmdutil, '_initialrevs', _initialrevs) |
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139 |
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140 def _clonesparsecmd(orig, ui, repo, *args, **opts): |
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141 include_pat = opts.get('include') |
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142 exclude_pat = opts.get('exclude') |
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143 enableprofile_pat = opts.get('enable_profile') |
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144 include = exclude = enableprofile = False |
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145 if include_pat: |
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146 pat = include_pat |
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147 include = True |
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148 if exclude_pat: |
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149 pat = exclude_pat |
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150 exclude = True |
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151 if enableprofile_pat: |
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152 pat = enableprofile_pat |
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153 enableprofile = True |
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154 if sum([include, exclude, enableprofile]) > 1: |
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155 raise error.Abort(_("too many flags specified.")) |
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156 if include or exclude or enableprofile: |
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157 def clonesparse(orig, self, node, overwrite, *args, **kwargs): |
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158 sparse.updateconfig(self.unfiltered(), pat, {}, include=include, |
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159 exclude=exclude, enableprofile=enableprofile, |
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160 usereporootpaths=True) |
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161 return orig(self, node, overwrite, *args, **kwargs) |
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162 extensions.wrapfunction(hg, 'updaterepo', clonesparse) |
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163 return orig(ui, repo, *args, **opts) |
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164 |
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165 def _setupclone(ui): |
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166 entry = commands.table['^clone'] |
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167 entry[1].append(('', 'enable-profile', [], |
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168 'enable a sparse profile')) |
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169 entry[1].append(('', 'include', [], |
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170 'include sparse pattern')) |
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171 entry[1].append(('', 'exclude', [], |
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172 'exclude sparse pattern')) |
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173 extensions.wrapcommand(commands.table, 'clone', _clonesparsecmd) |
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174 |
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175 def _setupadd(ui): |
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176 entry = commands.table['^add'] |
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177 entry[1].append(('s', 'sparse', None, |
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178 'also include directories of added files in sparse config')) |
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179 |
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180 def _add(orig, ui, repo, *pats, **opts): |
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181 if opts.get('sparse'): |
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182 dirs = set() |
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183 for pat in pats: |
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184 dirname, basename = util.split(pat) |
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185 dirs.add(dirname) |
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186 sparse.updateconfig(repo, list(dirs), opts, include=True) |
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187 return orig(ui, repo, *pats, **opts) |
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188 |
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189 extensions.wrapcommand(commands.table, 'add', _add) |
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190 |
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191 def _setupdirstate(ui): |
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192 """Modify the dirstate to prevent stat'ing excluded files, |
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193 and to prevent modifications to files outside the checkout. |
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194 """ |
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195 |
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196 def walk(orig, self, match, subrepos, unknown, ignored, full=True): |
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197 # hack to not exclude explicitly-specified paths so that they can |
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198 # be warned later on e.g. dirstate.add() |
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199 em = matchmod.exact(match._root, match._cwd, match.files()) |
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200 sm = matchmod.unionmatcher([self._sparsematcher, em]) |
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201 match = matchmod.intersectmatchers(match, sm) |
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202 return orig(self, match, subrepos, unknown, ignored, full) |
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203 |
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204 extensions.wrapfunction(dirstate.dirstate, 'walk', walk) |
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205 |
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206 # dirstate.rebuild should not add non-matching files |
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207 def _rebuild(orig, self, parent, allfiles, changedfiles=None): |
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208 matcher = self._sparsematcher |
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209 if not matcher.always(): |
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210 allfiles = allfiles.matches(matcher) |
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211 if changedfiles: |
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212 changedfiles = [f for f in changedfiles if matcher(f)] |
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213 |
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214 if changedfiles is not None: |
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215 # In _rebuild, these files will be deleted from the dirstate |
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216 # when they are not found to be in allfiles |
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217 dirstatefilestoremove = set(f for f in self if not matcher(f)) |
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218 changedfiles = dirstatefilestoremove.union(changedfiles) |
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219 |
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220 return orig(self, parent, allfiles, changedfiles) |
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221 extensions.wrapfunction(dirstate.dirstate, 'rebuild', _rebuild) |
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222 |
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223 # Prevent adding files that are outside the sparse checkout |
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224 editfuncs = ['normal', 'add', 'normallookup', 'copy', 'remove', 'merge'] |
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225 hint = _('include file with `hg debugsparse --include <pattern>` or use ' + |
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226 '`hg add -s <file>` to include file directory while adding') |
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227 for func in editfuncs: |
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228 def _wrapper(orig, self, *args): |
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229 sparsematch = self._sparsematcher |
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230 if not sparsematch.always(): |
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231 for f in args: |
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232 if (f is not None and not sparsematch(f) and |
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233 f not in self): |
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234 raise error.Abort(_("cannot add '%s' - it is outside " |
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235 "the sparse checkout") % f, |
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236 hint=hint) |
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237 return orig(self, *args) |
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238 extensions.wrapfunction(dirstate.dirstate, func, _wrapper) |
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239 |
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240 @command('^debugsparse', [ |
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241 ('I', 'include', False, _('include files in the sparse checkout')), |
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242 ('X', 'exclude', False, _('exclude files in the sparse checkout')), |
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243 ('d', 'delete', False, _('delete an include/exclude rule')), |
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244 ('f', 'force', False, _('allow changing rules even with pending changes')), |
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245 ('', 'enable-profile', False, _('enables the specified profile')), |
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246 ('', 'disable-profile', False, _('disables the specified profile')), |
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247 ('', 'import-rules', False, _('imports rules from a file')), |
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248 ('', 'clear-rules', False, _('clears local include/exclude rules')), |
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249 ('', 'refresh', False, _('updates the working after sparseness changes')), |
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250 ('', 'reset', False, _('makes the repo full again')), |
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251 ] + commands.templateopts, |
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252 _('[--OPTION] PATTERN...')) |
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253 def debugsparse(ui, repo, *pats, **opts): |
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254 """make the current checkout sparse, or edit the existing checkout |
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255 |
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256 The sparse command is used to make the current checkout sparse. |
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257 This means files that don't meet the sparse condition will not be |
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258 written to disk, or show up in any working copy operations. It does |
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259 not affect files in history in any way. |
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260 |
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261 Passing no arguments prints the currently applied sparse rules. |
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262 |
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263 --include and --exclude are used to add and remove files from the sparse |
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264 checkout. The effects of adding an include or exclude rule are applied |
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265 immediately. If applying the new rule would cause a file with pending |
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266 changes to be added or removed, the command will fail. Pass --force to |
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267 force a rule change even with pending changes (the changes on disk will |
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268 be preserved). |
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269 |
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270 --delete removes an existing include/exclude rule. The effects are |
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271 immediate. |
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272 |
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273 --refresh refreshes the files on disk based on the sparse rules. This is |
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274 only necessary if .hg/sparse was changed by hand. |
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275 |
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276 --enable-profile and --disable-profile accept a path to a .hgsparse file. |
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277 This allows defining sparse checkouts and tracking them inside the |
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278 repository. This is useful for defining commonly used sparse checkouts for |
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279 many people to use. As the profile definition changes over time, the sparse |
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280 checkout will automatically be updated appropriately, depending on which |
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281 changeset is checked out. Changes to .hgsparse are not applied until they |
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282 have been committed. |
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283 |
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284 --import-rules accepts a path to a file containing rules in the .hgsparse |
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285 format, allowing you to add --include, --exclude and --enable-profile rules |
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286 in bulk. Like the --include, --exclude and --enable-profile switches, the |
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287 changes are applied immediately. |
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288 |
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289 --clear-rules removes all local include and exclude rules, while leaving |
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290 any enabled profiles in place. |
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291 |
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292 Returns 0 if editing the sparse checkout succeeds. |
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293 """ |
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294 opts = pycompat.byteskwargs(opts) |
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295 include = opts.get('include') |
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296 exclude = opts.get('exclude') |
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297 force = opts.get('force') |
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298 enableprofile = opts.get('enable_profile') |
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299 disableprofile = opts.get('disable_profile') |
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300 importrules = opts.get('import_rules') |
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301 clearrules = opts.get('clear_rules') |
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302 delete = opts.get('delete') |
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303 refresh = opts.get('refresh') |
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304 reset = opts.get('reset') |
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305 count = sum([include, exclude, enableprofile, disableprofile, delete, |
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306 importrules, refresh, clearrules, reset]) |
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307 if count > 1: |
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308 raise error.Abort(_("too many flags specified")) |
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309 |
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310 if count == 0: |
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311 if repo.vfs.exists('sparse'): |
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312 ui.status(repo.vfs.read("sparse") + "\n") |
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313 temporaryincludes = sparse.readtemporaryincludes(repo) |
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314 if temporaryincludes: |
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315 ui.status(_("Temporarily Included Files (for merge/rebase):\n")) |
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316 ui.status(("\n".join(temporaryincludes) + "\n")) |
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317 else: |
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318 ui.status(_('repo is not sparse\n')) |
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319 return |
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320 |
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321 if include or exclude or delete or reset or enableprofile or disableprofile: |
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322 sparse.updateconfig(repo, pats, opts, include=include, exclude=exclude, |
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323 reset=reset, delete=delete, |
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324 enableprofile=enableprofile, |
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325 disableprofile=disableprofile, force=force) |
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326 |
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327 if importrules: |
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328 sparse.importfromfiles(repo, opts, pats, force=force) |
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329 |
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330 if clearrules: |
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331 sparse.clearrules(repo, force=force) |
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332 |
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333 if refresh: |
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334 try: |
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335 wlock = repo.wlock() |
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336 fcounts = map( |
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337 len, |
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338 sparse.refreshwdir(repo, repo.status(), sparse.matcher(repo), |
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339 force=force)) |
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340 sparse.printchanges(ui, opts, added=fcounts[0], dropped=fcounts[1], |
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341 conflicting=fcounts[2]) |
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342 finally: |
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343 wlock.release() |