Mercurial > hg
annotate hgext/narrow/narrowcommands.py @ 39356:c8e4eae84808
narrow: add server logic to send cg while widening without ellipsis
Before this patch, if you try to widen a narrow clone without ellipsis enabled,
it will be broken and the exchange.pull() done by tracked command to widen the
clone will be no-op because no custom logic exists for this and server sees that
we have all csets and it says `no changes found`.
The widening with ellipsis send KILL for existing changegroups and send new
changegroups because of the change in ellipsis hash, but we can prevent that in
non-ellipsis cases.
This patch adds server side logic to send the changegroups for the changesets
which are on the client again with filelogs and manifests for the new includes.
This is a very starting implementation and we send changegroups and manifests
too while we can prevent them.
Following things can definitely be improved in the logic this patch adds:
1) Send just the filelogs and treemanifests
2) Send the filelogs only for the additions in the include
I tried 1) here but the code is coupled tightly and the way I was able to do
that was hacking into the changegroup generation code in a very dirty way, like
adding conditionals and preventing the yield.
This patch also adds a 'widen' kwarg to prevent other commands except widening
to go through that codepath.
The test changes demonstrate that the new implementation is correct and fixes
things.
Differential Revision: https://phab.mercurial-scm.org/D4383
author | Pulkit Goyal <pulkit@yandex-team.ru> |
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date | Sun, 26 Aug 2018 20:20:34 +0300 |
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1 # narrowcommands.py - command modifications for narrowhg extension |
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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 from __future__ import absolute_import |
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8 |
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9 import itertools |
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10 import os |
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11 |
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12 from mercurial.i18n import _ |
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13 from mercurial import ( |
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14 cmdutil, |
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15 commands, |
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16 discovery, |
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17 error, |
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18 exchange, |
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19 extensions, |
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20 hg, |
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21 merge, |
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22 narrowspec, |
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23 node, |
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24 pycompat, |
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25 registrar, |
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26 repair, |
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27 repository, |
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28 repoview, |
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29 sparse, |
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30 util, |
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31 ) |
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32 |
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33 from . import ( |
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34 narrowbundle2, |
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35 ) |
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36 |
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37 table = {} |
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38 command = registrar.command(table) |
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39 |
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40 def setup(): |
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41 """Wraps user-facing mercurial commands with narrow-aware versions.""" |
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42 |
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43 entry = extensions.wrapcommand(commands.table, 'clone', clonenarrowcmd) |
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44 entry[1].append(('', 'narrow', None, |
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45 _("create a narrow clone of select files"))) |
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46 entry[1].append(('', 'depth', '', |
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47 _("limit the history fetched by distance from heads"))) |
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48 entry[1].append(('', 'narrowspec', '', |
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49 _("read narrowspecs from file"))) |
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50 # TODO(durin42): unify sparse/narrow --include/--exclude logic a bit |
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51 if 'sparse' not in extensions.enabled(): |
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52 entry[1].append(('', 'include', [], |
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53 _("specifically fetch this file/directory"))) |
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54 entry[1].append( |
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55 ('', 'exclude', [], |
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56 _("do not fetch this file/directory, even if included"))) |
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57 |
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58 entry = extensions.wrapcommand(commands.table, 'pull', pullnarrowcmd) |
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59 entry[1].append(('', 'depth', '', |
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60 _("limit the history fetched by distance from heads"))) |
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61 |
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62 extensions.wrapcommand(commands.table, 'archive', archivenarrowcmd) |
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63 |
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64 def expandpull(pullop, includepats, excludepats): |
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65 if not narrowspec.needsexpansion(includepats): |
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66 return includepats, excludepats |
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67 |
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68 heads = pullop.heads or pullop.rheads |
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69 includepats, excludepats = pullop.remote.expandnarrow( |
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70 includepats, excludepats, heads) |
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71 pullop.repo.ui.debug('Expanded narrowspec to inc=%s, exc=%s\n' % ( |
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72 includepats, excludepats)) |
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73 return set(includepats), set(excludepats) |
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74 |
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75 def clonenarrowcmd(orig, ui, repo, *args, **opts): |
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76 """Wraps clone command, so 'hg clone' first wraps localrepo.clone().""" |
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77 opts = pycompat.byteskwargs(opts) |
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78 wrappedextraprepare = util.nullcontextmanager() |
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79 opts_narrow = opts['narrow'] |
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80 narrowspecfile = opts['narrowspec'] |
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81 |
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82 if narrowspecfile: |
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83 filepath = os.path.join(pycompat.getcwd(), narrowspecfile) |
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84 ui.status(_("reading narrowspec from '%s'\n") % filepath) |
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85 try: |
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86 fp = open(filepath, 'rb') |
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87 except IOError: |
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88 raise error.Abort(_("file '%s' not found") % filepath) |
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89 |
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90 includes, excludes, profiles = sparse.parseconfig(ui, fp.read(), |
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91 'narrow') |
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92 if profiles: |
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93 raise error.Abort(_("cannot specify other files using '%include' in" |
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94 " narrowspec")) |
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95 |
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96 # narrowspec is passed so we should assume that user wants narrow clone |
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97 opts_narrow = True |
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98 opts['include'].extend(includes) |
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99 opts['exclude'].extend(excludes) |
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100 |
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101 if opts_narrow: |
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102 def pullbundle2extraprepare_widen(orig, pullop, kwargs): |
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103 # Create narrow spec patterns from clone flags |
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104 includepats = narrowspec.parsepatterns(opts['include']) |
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105 excludepats = narrowspec.parsepatterns(opts['exclude']) |
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106 |
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107 # If necessary, ask the server to expand the narrowspec. |
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108 includepats, excludepats = expandpull( |
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109 pullop, includepats, excludepats) |
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110 |
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111 if not includepats and excludepats: |
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112 # If nothing was included, we assume the user meant to include |
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113 # everything, except what they asked to exclude. |
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114 includepats = {'path:.'} |
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115 |
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116 pullop.repo.setnarrowpats(includepats, excludepats) |
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117 |
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118 # This will populate 'includepats' etc with the values from the |
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119 # narrowspec we just saved. |
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120 orig(pullop, kwargs) |
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121 |
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122 if opts.get('depth'): |
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123 kwargs['depth'] = opts['depth'] |
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124 wrappedextraprepare = extensions.wrappedfunction(exchange, |
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125 '_pullbundle2extraprepare', pullbundle2extraprepare_widen) |
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126 |
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127 def pullnarrow(orig, repo, *args, **kwargs): |
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128 if opts_narrow: |
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129 repo.requirements.add(repository.NARROW_REQUIREMENT) |
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130 repo._writerequirements() |
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131 |
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132 return orig(repo, *args, **kwargs) |
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133 |
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134 wrappedpull = extensions.wrappedfunction(exchange, 'pull', pullnarrow) |
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135 |
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136 with wrappedextraprepare, wrappedpull: |
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137 return orig(ui, repo, *args, **pycompat.strkwargs(opts)) |
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138 |
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139 def pullnarrowcmd(orig, ui, repo, *args, **opts): |
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140 """Wraps pull command to allow modifying narrow spec.""" |
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141 wrappedextraprepare = util.nullcontextmanager() |
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142 if repository.NARROW_REQUIREMENT in repo.requirements: |
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143 |
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144 def pullbundle2extraprepare_widen(orig, pullop, kwargs): |
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145 orig(pullop, kwargs) |
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146 if opts.get(r'depth'): |
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147 kwargs['depth'] = opts[r'depth'] |
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148 wrappedextraprepare = extensions.wrappedfunction(exchange, |
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149 '_pullbundle2extraprepare', pullbundle2extraprepare_widen) |
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150 |
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151 with wrappedextraprepare: |
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152 return orig(ui, repo, *args, **opts) |
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153 |
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154 def archivenarrowcmd(orig, ui, repo, *args, **opts): |
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155 """Wraps archive command to narrow the default includes.""" |
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156 if repository.NARROW_REQUIREMENT in repo.requirements: |
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157 repo_includes, repo_excludes = repo.narrowpats |
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158 includes = set(opts.get(r'include', [])) |
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159 excludes = set(opts.get(r'exclude', [])) |
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160 includes, excludes, unused_invalid = narrowspec.restrictpatterns( |
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161 includes, excludes, repo_includes, repo_excludes) |
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162 if includes: |
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163 opts[r'include'] = includes |
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164 if excludes: |
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165 opts[r'exclude'] = excludes |
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166 return orig(ui, repo, *args, **opts) |
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167 |
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168 def pullbundle2extraprepare(orig, pullop, kwargs): |
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169 repo = pullop.repo |
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170 if repository.NARROW_REQUIREMENT not in repo.requirements: |
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171 return orig(pullop, kwargs) |
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172 |
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173 if narrowbundle2.NARROWCAP not in pullop.remotebundle2caps: |
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174 raise error.Abort(_("server doesn't support narrow clones")) |
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175 orig(pullop, kwargs) |
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176 kwargs['narrow'] = True |
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177 include, exclude = repo.narrowpats |
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178 kwargs['oldincludepats'] = include |
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179 kwargs['oldexcludepats'] = exclude |
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180 kwargs['includepats'] = include |
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181 kwargs['excludepats'] = exclude |
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182 kwargs['known'] = [node.hex(ctx.node()) for ctx in |
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183 repo.set('::%ln', pullop.common) |
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184 if ctx.node() != node.nullid] |
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185 if not kwargs['known']: |
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186 # Mercurial serialized an empty list as '' and deserializes it as |
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187 # [''], so delete it instead to avoid handling the empty string on the |
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188 # server. |
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189 del kwargs['known'] |
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190 |
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191 extensions.wrapfunction(exchange,'_pullbundle2extraprepare', |
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192 pullbundle2extraprepare) |
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193 |
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194 def _narrow(ui, repo, remote, commoninc, oldincludes, oldexcludes, |
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195 newincludes, newexcludes, force): |
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196 oldmatch = narrowspec.match(repo.root, oldincludes, oldexcludes) |
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197 newmatch = narrowspec.match(repo.root, newincludes, newexcludes) |
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198 |
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199 # This is essentially doing "hg outgoing" to find all local-only |
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200 # commits. We will then check that the local-only commits don't |
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201 # have any changes to files that will be untracked. |
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202 unfi = repo.unfiltered() |
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203 outgoing = discovery.findcommonoutgoing(unfi, remote, |
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204 commoninc=commoninc) |
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205 ui.status(_('looking for local changes to affected paths\n')) |
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206 localnodes = [] |
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207 for n in itertools.chain(outgoing.missing, outgoing.excluded): |
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208 if any(oldmatch(f) and not newmatch(f) for f in unfi[n].files()): |
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209 localnodes.append(n) |
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210 revstostrip = unfi.revs('descendants(%ln)', localnodes) |
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211 hiddenrevs = repoview.filterrevs(repo, 'visible') |
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212 visibletostrip = list(repo.changelog.node(r) |
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213 for r in (revstostrip - hiddenrevs)) |
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214 if visibletostrip: |
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215 ui.status(_('The following changeset(s) or their ancestors have ' |
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216 'local changes not on the remote:\n')) |
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217 maxnodes = 10 |
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218 if ui.verbose or len(visibletostrip) <= maxnodes: |
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219 for n in visibletostrip: |
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220 ui.status('%s\n' % node.short(n)) |
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221 else: |
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222 for n in visibletostrip[:maxnodes]: |
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223 ui.status('%s\n' % node.short(n)) |
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224 ui.status(_('...and %d more, use --verbose to list all\n') % |
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225 (len(visibletostrip) - maxnodes)) |
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226 if not force: |
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227 raise error.Abort(_('local changes found'), |
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228 hint=_('use --force-delete-local-changes to ' |
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229 'ignore')) |
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230 |
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231 with ui.uninterruptable(): |
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232 if revstostrip: |
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233 tostrip = [unfi.changelog.node(r) for r in revstostrip] |
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234 if repo['.'].node() in tostrip: |
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235 # stripping working copy, so move to a different commit first |
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236 urev = max(repo.revs('(::%n) - %ln + null', |
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237 repo['.'].node(), visibletostrip)) |
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238 hg.clean(repo, urev) |
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239 repair.strip(ui, unfi, tostrip, topic='narrow') |
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240 |
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241 todelete = [] |
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242 for f, f2, size in repo.store.datafiles(): |
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243 if f.startswith('data/'): |
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244 file = f[5:-2] |
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245 if not newmatch(file): |
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246 todelete.append(f) |
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247 elif f.startswith('meta/'): |
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248 dir = f[5:-13] |
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249 dirs = ['.'] + sorted(util.dirs({dir})) + [dir] |
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250 include = True |
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251 for d in dirs: |
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252 visit = newmatch.visitdir(d) |
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253 if not visit: |
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254 include = False |
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255 break |
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256 if visit == 'all': |
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257 break |
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258 if not include: |
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259 todelete.append(f) |
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260 |
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261 repo.destroying() |
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262 |
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263 with repo.transaction("narrowing"): |
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264 for f in todelete: |
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265 ui.status(_('deleting %s\n') % f) |
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266 util.unlinkpath(repo.svfs.join(f)) |
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267 repo.store.markremoved(f) |
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268 |
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269 for f in repo.dirstate: |
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270 if not newmatch(f): |
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271 repo.dirstate.drop(f) |
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272 repo.wvfs.unlinkpath(f) |
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273 repo.setnarrowpats(newincludes, newexcludes) |
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274 |
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275 repo.destroyed() |
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276 |
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277 def _widen(ui, repo, remote, commoninc, newincludes, newexcludes): |
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278 newmatch = narrowspec.match(repo.root, newincludes, newexcludes) |
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279 |
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280 # TODO(martinvonz): Get expansion working with widening/narrowing. |
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281 if narrowspec.needsexpansion(newincludes): |
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282 raise error.Abort('Expansion not yet supported on pull') |
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283 |
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284 def pullbundle2extraprepare_widen(orig, pullop, kwargs): |
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285 orig(pullop, kwargs) |
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286 # The old{in,ex}cludepats have already been set by orig() |
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287 kwargs['includepats'] = newincludes |
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288 kwargs['excludepats'] = newexcludes |
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289 kwargs['widen'] = True |
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290 wrappedextraprepare = extensions.wrappedfunction(exchange, |
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291 '_pullbundle2extraprepare', pullbundle2extraprepare_widen) |
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292 |
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293 # define a function that narrowbundle2 can call after creating the |
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294 # backup bundle, but before applying the bundle from the server |
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295 def setnewnarrowpats(): |
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296 repo.setnarrowpats(newincludes, newexcludes) |
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297 repo.setnewnarrowpats = setnewnarrowpats |
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298 |
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299 with ui.uninterruptable(): |
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300 ds = repo.dirstate |
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301 p1, p2 = ds.p1(), ds.p2() |
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302 with ds.parentchange(): |
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303 ds.setparents(node.nullid, node.nullid) |
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304 common = commoninc[0] |
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305 with wrappedextraprepare: |
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306 exchange.pull(repo, remote, heads=common) |
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307 with ds.parentchange(): |
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308 ds.setparents(p1, p2) |
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309 |
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310 actions = {k: [] for k in 'a am f g cd dc r dm dg m e k p pr'.split()} |
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311 addgaction = actions['g'].append |
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312 |
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313 mf = repo['.'].manifest().matches(newmatch) |
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314 for f, fn in mf.iteritems(): |
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315 if f not in repo.dirstate: |
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316 addgaction((f, (mf.flags(f), False), |
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317 "add from widened narrow clone")) |
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318 |
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319 merge.applyupdates(repo, actions, wctx=repo[None], |
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320 mctx=repo['.'], overwrite=False) |
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321 merge.recordupdates(repo, actions, branchmerge=False) |
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322 |
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323 # TODO(rdamazio): Make new matcher format and update description |
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324 @command('tracked', |
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325 [('', 'addinclude', [], _('new paths to include')), |
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326 ('', 'removeinclude', [], _('old paths to no longer include')), |
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327 ('', 'addexclude', [], _('new paths to exclude')), |
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328 ('', 'removeexclude', [], _('old paths to no longer exclude')), |
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329 ('', 'clear', False, _('whether to replace the existing narrowspec')), |
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330 ('', 'force-delete-local-changes', False, |
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331 _('forces deletion of local changes when narrowing')), |
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332 ] + commands.remoteopts, |
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333 _('[OPTIONS]... [REMOTE]'), |
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334 inferrepo=True) |
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335 def trackedcmd(ui, repo, remotepath=None, *pats, **opts): |
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336 """show or change the current narrowspec |
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337 |
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338 With no argument, shows the current narrowspec entries, one per line. Each |
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339 line will be prefixed with 'I' or 'X' for included or excluded patterns, |
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340 respectively. |
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341 |
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342 The narrowspec is comprised of expressions to match remote files and/or |
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343 directories that should be pulled into your client. |
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344 The narrowspec has *include* and *exclude* expressions, with excludes always |
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345 trumping includes: that is, if a file matches an exclude expression, it will |
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346 be excluded even if it also matches an include expression. |
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347 Excluding files that were never included has no effect. |
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348 |
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349 Each included or excluded entry is in the format described by |
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350 'hg help patterns'. |
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351 |
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352 The options allow you to add or remove included and excluded expressions. |
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353 |
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354 If --clear is specified, then all previous includes and excludes are DROPPED |
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355 and replaced by the new ones specified to --addinclude and --addexclude. |
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356 If --clear is specified without any further options, the narrowspec will be |
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357 empty and will not match any files. |
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358 """ |
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359 opts = pycompat.byteskwargs(opts) |
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360 if repository.NARROW_REQUIREMENT not in repo.requirements: |
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361 ui.warn(_('The narrow command is only supported on respositories cloned' |
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362 ' with --narrow.\n')) |
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363 return 1 |
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364 |
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365 # Before supporting, decide whether it "hg tracked --clear" should mean |
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366 # tracking no paths or all paths. |
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367 if opts['clear']: |
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368 ui.warn(_('The --clear option is not yet supported.\n')) |
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369 return 1 |
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370 |
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371 if narrowspec.needsexpansion(opts['addinclude'] + opts['addexclude']): |
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372 raise error.Abort('Expansion not yet supported on widen/narrow') |
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373 |
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374 addedincludes = narrowspec.parsepatterns(opts['addinclude']) |
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375 removedincludes = narrowspec.parsepatterns(opts['removeinclude']) |
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376 addedexcludes = narrowspec.parsepatterns(opts['addexclude']) |
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377 removedexcludes = narrowspec.parsepatterns(opts['removeexclude']) |
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378 widening = addedincludes or removedexcludes |
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379 narrowing = removedincludes or addedexcludes |
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380 only_show = not widening and not narrowing |
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381 |
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382 # Only print the current narrowspec. |
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383 if only_show: |
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384 include, exclude = repo.narrowpats |
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385 |
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386 ui.pager('tracked') |
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387 fm = ui.formatter('narrow', opts) |
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388 for i in sorted(include): |
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389 fm.startitem() |
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390 fm.write('status', '%s ', 'I', label='narrow.included') |
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391 fm.write('pat', '%s\n', i, label='narrow.included') |
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392 for i in sorted(exclude): |
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393 fm.startitem() |
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394 fm.write('status', '%s ', 'X', label='narrow.excluded') |
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395 fm.write('pat', '%s\n', i, label='narrow.excluded') |
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396 fm.end() |
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397 return 0 |
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398 |
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399 with repo.wlock(), repo.lock(): |
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400 cmdutil.bailifchanged(repo) |
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401 |
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402 # Find the revisions we have in common with the remote. These will |
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403 # be used for finding local-only changes for narrowing. They will |
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404 # also define the set of revisions to update for widening. |
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405 remotepath = ui.expandpath(remotepath or 'default') |
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406 url, branches = hg.parseurl(remotepath) |
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407 ui.status(_('comparing with %s\n') % util.hidepassword(url)) |
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408 remote = hg.peer(repo, opts, url) |
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409 commoninc = discovery.findcommonincoming(repo, remote) |
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410 |
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411 oldincludes, oldexcludes = repo.narrowpats |
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412 if narrowing: |
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413 newincludes = oldincludes - removedincludes |
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414 newexcludes = oldexcludes | addedexcludes |
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415 _narrow(ui, repo, remote, commoninc, oldincludes, oldexcludes, |
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416 newincludes, newexcludes, |
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417 opts['force_delete_local_changes']) |
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418 # _narrow() updated the narrowspec and _widen() below needs to |
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419 # use the updated values as its base (otherwise removed includes |
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420 # and addedexcludes will be lost in the resulting narrowspec) |
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421 oldincludes = newincludes |
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422 oldexcludes = newexcludes |
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423 |
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424 if widening: |
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425 newincludes = oldincludes | addedincludes |
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426 newexcludes = oldexcludes - removedexcludes |
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427 _widen(ui, repo, remote, commoninc, newincludes, newexcludes) |
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428 |
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429 return 0 |