Mercurial > hg
annotate hgext/narrow/narrowrevlog.py @ 36079:a2a6e724d61a
narrow: import experimental extension from narrowhg revision cb51d673e9c5
Adjustments:
* renamed src to hgext/narrow
* marked extension experimental
* added correct copyright header where it was missing
* updated hgrc extension enable line in library.sh
* renamed library.sh to narrow-library.sh
* dropped all files from repo root as they're not interesting
* dropped test-pyflakes.t, test-check-code.t and test-check-py3-compat.t
* renamed remaining tests to all be test-narrow-* when they didn't already
* fixed test-narrow-expanddirstate.t to refer to narrow and not narrowhg
* fixed tests that wanted `update -C .` instead of `merge --abort`
* corrected a two-space indent in narrowspec.py
* added a missing _() in narrowcommands.py
* fixed imports to pass the import checker
* narrow only adds its --include and --exclude to clone if sparse isn't
enabled to avoid breaking test-duplicateoptions.py. This is a kludge,
and we'll need to come up with a better solution in the future.
These were more or less the minimum to import something that would
pass tests and not create a bunch of files we'll never use.
Changes I intend to make as followups:
* rework the test-narrow-*-tree.t tests to use the new testcases
functionality in run-tests.py
* remove lots of monkeypatches of core things
Differential Revision: https://phab.mercurial-scm.org/D1974
author | Augie Fackler <augie@google.com> |
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date | Mon, 29 Jan 2018 16:19:33 -0500 |
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children | adc8e1fe2f46 |
rev | line source |
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1 # narrowrevlog.py - revlog storing irrelevant nodes as "ellipsis" nodes |
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2 # |
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3 # Copyright 2017 Google, Inc. |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 from mercurial import ( |
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11 manifest, |
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12 revlog, |
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13 util, |
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14 ) |
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15 |
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16 ELLIPSIS_NODE_FLAG = 1 << 14 |
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17 revlog.REVIDX_KNOWN_FLAGS |= ELLIPSIS_NODE_FLAG |
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18 if (util.safehasattr(revlog, 'REVIDX_FLAGS_ORDER') and |
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19 ELLIPSIS_NODE_FLAG not in revlog.REVIDX_FLAGS_ORDER): |
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20 revlog.REVIDX_FLAGS_ORDER.append(ELLIPSIS_NODE_FLAG) |
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21 |
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22 def readtransform(self, text): |
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23 return text, False |
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24 |
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25 def writetransform(self, text): |
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26 return text, False |
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27 |
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28 def rawtransform(self, text): |
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29 return False |
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30 |
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31 if util.safehasattr(revlog, 'addflagprocessor'): |
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32 revlog.addflagprocessor(ELLIPSIS_NODE_FLAG, |
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33 (readtransform, writetransform, rawtransform)) |
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34 |
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35 def setup(): |
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36 # We just wanted to add the flag processor, which is done at module |
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37 # load time. |
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38 pass |
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39 |
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40 class excludeddir(manifest.treemanifest): |
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41 def __init__(self, dir, node): |
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42 super(excludeddir, self).__init__(dir) |
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43 self._node = node |
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44 # Add an empty file, which will be included by iterators and such, |
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45 # appearing as the directory itself (i.e. something like "dir/") |
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46 self._files[''] = node |
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47 self._flags[''] = 't' |
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48 |
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49 # Manifests outside the narrowspec should never be modified, so avoid |
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50 # copying. This makes a noticeable difference when there are very many |
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51 # directories outside the narrowspec. Also, it makes sense for the copy to |
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52 # be of the same type as the original, which would not happen with the |
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53 # super type's copy(). |
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54 def copy(self): |
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55 return self |
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56 |
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57 class excludeddirmanifestctx(manifest.treemanifestctx): |
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58 def __init__(self, dir, node): |
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59 self._dir = dir |
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60 self._node = node |
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61 |
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62 def read(self): |
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63 return excludeddir(self._dir, self._node) |
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64 |
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65 def write(self, *args): |
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66 raise AssertionError('Attempt to write manifest from excluded dir %s' % |
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67 self._dir) |
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68 |
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69 class excludedmanifestrevlog(manifest.manifestrevlog): |
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70 def __init__(self, dir): |
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71 self._dir = dir |
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72 |
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73 def __len__(self): |
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74 raise AssertionError('Attempt to get length of excluded dir %s' % |
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75 self._dir) |
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76 |
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77 def rev(self, node): |
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78 raise AssertionError('Attempt to get rev from excluded dir %s' % |
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79 self._dir) |
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80 |
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81 def linkrev(self, node): |
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82 raise AssertionError('Attempt to get linkrev from excluded dir %s' % |
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83 self._dir) |
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84 |
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85 def node(self, rev): |
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86 raise AssertionError('Attempt to get node from excluded dir %s' % |
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87 self._dir) |
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88 |
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89 def add(self, *args, **kwargs): |
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90 # We should never write entries in dirlogs outside the narrow clone. |
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91 # However, the method still gets called from writesubtree() in |
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92 # _addtree(), so we need to handle it. We should possibly make that |
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93 # avoid calling add() with a clean manifest (_dirty is always False |
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94 # in excludeddir instances). |
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95 pass |
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96 |
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97 def makenarrowmanifestrevlog(mfrevlog, repo): |
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98 if util.safehasattr(mfrevlog, '_narrowed'): |
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99 return |
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100 |
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101 class narrowmanifestrevlog(mfrevlog.__class__): |
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102 # This function is called via debug{revlog,index,data}, but also during |
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103 # at least some push operations. This will be used to wrap/exclude the |
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104 # child directories when using treemanifests. |
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105 def dirlog(self, dir): |
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106 if dir and not dir.endswith('/'): |
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107 dir = dir + '/' |
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108 if not repo.narrowmatch().visitdir(dir[:-1] or '.'): |
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109 return excludedmanifestrevlog(dir) |
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110 result = super(narrowmanifestrevlog, self).dirlog(dir) |
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111 makenarrowmanifestrevlog(result, repo) |
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112 return result |
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113 |
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114 mfrevlog.__class__ = narrowmanifestrevlog |
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115 mfrevlog._narrowed = True |
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116 |
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117 def makenarrowmanifestlog(mfl, repo): |
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118 class narrowmanifestlog(mfl.__class__): |
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119 def get(self, dir, node, verify=True): |
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120 if not repo.narrowmatch().visitdir(dir[:-1] or '.'): |
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121 return excludeddirmanifestctx(dir, node) |
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122 return super(narrowmanifestlog, self).get(dir, node, verify=verify) |
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123 mfl.__class__ = narrowmanifestlog |
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124 |
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125 def makenarrowfilelog(fl, narrowmatch): |
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126 class narrowfilelog(fl.__class__): |
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127 def renamed(self, node): |
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128 m = super(narrowfilelog, self).renamed(node) |
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129 if m and not narrowmatch(m[0]): |
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130 return None |
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131 return m |
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132 |
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133 def size(self, rev): |
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134 # We take advantage of the fact that remotefilelog |
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135 # lacks a node() method to just skip the |
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136 # rename-checking logic when on remotefilelog. This |
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137 # might be incorrect on other non-revlog-based storage |
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138 # engines, but for now this seems to be fine. |
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139 if util.safehasattr(self, 'node'): |
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140 node = self.node(rev) |
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141 # Because renamed() is overridden above to |
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142 # sometimes return None even if there is metadata |
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143 # in the revlog, size can be incorrect for |
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144 # copies/renames, so we need to make sure we call |
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145 # the super class's implementation of renamed() |
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146 # for the purpose of size calculation. |
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147 if super(narrowfilelog, self).renamed(node): |
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148 return len(self.read(node)) |
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149 return super(narrowfilelog, self).size(rev) |
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150 |
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151 def cmp(self, node, text): |
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152 different = super(narrowfilelog, self).cmp(node, text) |
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153 if different: |
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154 # Similar to size() above, if the file was copied from |
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155 # a file outside the narrowspec, the super class's |
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156 # would have returned True because we tricked it into |
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157 # thinking that the file was not renamed. |
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158 if super(narrowfilelog, self).renamed(node): |
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159 t2 = self.read(node) |
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160 return t2 != text |
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161 return different |
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162 |
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163 fl.__class__ = narrowfilelog |