Mercurial > hg
annotate hgext/narrow/narrowcommands.py @ 39772:ae531f5e583c
testing: add interface unit tests for file storage
Our strategy for supporting alternate storage backends is to define
interfaces for everything then "code to the interface."
We already have interfaces for various primitives, including file
and manifest storage.
What we don't have is generic unit tests for those interfaces. Up
to this point we've been relying on high-level integration tests
(mainly in the form of existing .t tests) to test alternate storage
backends. And my experience with developing the "simple store" test
extension is that such testing is very tedious: it takes several
minutes to run all tests and when you find a failure, it is often
non-trivial to debug.
This commit starts to change that.
This commit introduces the mercurial.testing.storage module. It
contains testing code for storage. Currently, it defines some
unittest.TestCase classes for testing the file storage interfaces.
It also defines some factory functions that allow a caller to easily
spawn a custom TestCase "bound" to a specific file storage backend
implementation.
A new .py test has been added. It simply defines a callable to produce
filelog and transaction instances on demand and then "registers" the
various test classes so the filelog class can be tested with the
storage interface unit tests.
As part of writing the tests, I identified a couple of apparent
bugs in revlog.py and filelog.py! These are tracked with inline
TODO comments.
Writing the tests makes it more obvious where the storage interface
is lacking. For example, we raise either IndexError or
error.LookupError for missing revisions depending on whether we
use an integer revision or a node. Also, we raise error.RevlogError
in various places when we should be raising a storage-agnostic
error type.
The storage interfaces are currently far from perfect and there is much
work to be done to improve them. But at least with this commit we
finally have the start of unit tests that can be used to "qualify"
the behavior of a storage backend. And when implementing and debugging
new storage backends, we now have an obvious place to define new
tests and have obvious places to insert breakpoints to facilitate
debugging. This should be invaluable when implementing new storage
backends.
I added the mercurial.testing package because these interface
conformance tests are generic and need to be usable by all storage
backends. Having the code live in tests/ would make it difficult for
storage backends implemented in extensions to test their interface
conformance. First, it would require obtaining a copy of Mercurial's
storage test code in order to test. Second, it would make testing
against multiple Mercurial versions difficult, as you would need to
import N copies of the storage testing code in order to achieve test
coverage. By making the test code part of the Mercurial distribution
itself, extensions can `import mercurial.testing.*` to access and run
the test code. The test will run against whatever Mercurial version
is active.
FWIW I've always wanted to move parts of run-tests.py into the
mercurial.* package to make the testing story simpler (e.g. imagine an
`hg debugruntests` command that could invoke the test harness). While I
have no plans to do that in the near future, establishing the
mercurial.testing package does provide a natural home for that code
should someone do this in the future.
Differential Revision: https://phab.mercurial-scm.org/D4650
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Tue, 18 Sep 2018 16:52:11 -0700 |
parents | 9d5c919b6dc3 |
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rev | line source |
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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 encoding, |
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18 error, |
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19 exchange, |
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20 extensions, |
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21 hg, |
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22 merge, |
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23 narrowspec, |
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24 node, |
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25 pycompat, |
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26 registrar, |
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27 repair, |
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28 repository, |
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29 repoview, |
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30 sparse, |
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31 util, |
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32 ) |
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33 |
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34 from . import ( |
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35 narrowwirepeer, |
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36 ) |
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37 |
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38 table = {} |
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39 command = registrar.command(table) |
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40 |
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41 def setup(): |
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42 """Wraps user-facing mercurial commands with narrow-aware versions.""" |
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43 |
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44 entry = extensions.wrapcommand(commands.table, 'clone', clonenarrowcmd) |
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45 entry[1].append(('', 'narrow', None, |
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46 _("create a narrow clone of select files"))) |
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47 entry[1].append(('', 'depth', '', |
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48 _("limit the history fetched by distance from heads"))) |
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49 entry[1].append(('', 'narrowspec', '', |
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50 _("read narrowspecs from file"))) |
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51 # TODO(durin42): unify sparse/narrow --include/--exclude logic a bit |
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52 if 'sparse' not in extensions.enabled(): |
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53 entry[1].append(('', 'include', [], |
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54 _("specifically fetch this file/directory"))) |
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55 entry[1].append( |
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56 ('', 'exclude', [], |
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57 _("do not fetch this file/directory, even if included"))) |
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58 |
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59 entry = extensions.wrapcommand(commands.table, 'pull', pullnarrowcmd) |
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60 entry[1].append(('', 'depth', '', |
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61 _("limit the history fetched by distance from heads"))) |
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62 |
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63 extensions.wrapcommand(commands.table, 'archive', archivenarrowcmd) |
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64 |
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65 def clonenarrowcmd(orig, ui, repo, *args, **opts): |
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66 """Wraps clone command, so 'hg clone' first wraps localrepo.clone().""" |
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67 opts = pycompat.byteskwargs(opts) |
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68 wrappedextraprepare = util.nullcontextmanager() |
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69 narrowspecfile = opts['narrowspec'] |
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70 |
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71 if narrowspecfile: |
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72 filepath = os.path.join(pycompat.getcwd(), narrowspecfile) |
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73 ui.status(_("reading narrowspec from '%s'\n") % filepath) |
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74 try: |
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75 fdata = util.readfile(filepath) |
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76 except IOError as inst: |
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77 raise error.Abort(_("cannot read narrowspecs from '%s': %s") % |
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78 (filepath, encoding.strtolocal(inst.strerror))) |
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79 |
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80 includes, excludes, profiles = sparse.parseconfig(ui, fdata, 'narrow') |
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81 if profiles: |
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82 raise error.Abort(_("cannot specify other files using '%include' in" |
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83 " narrowspec")) |
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84 |
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85 narrowspec.validatepatterns(includes) |
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86 narrowspec.validatepatterns(excludes) |
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87 |
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88 # narrowspec is passed so we should assume that user wants narrow clone |
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89 opts['narrow'] = True |
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90 opts['include'].extend(includes) |
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91 opts['exclude'].extend(excludes) |
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92 |
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93 if opts['narrow']: |
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94 def pullbundle2extraprepare_widen(orig, pullop, kwargs): |
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95 orig(pullop, kwargs) |
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96 |
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97 if opts.get('depth'): |
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98 kwargs['depth'] = opts['depth'] |
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99 wrappedextraprepare = extensions.wrappedfunction(exchange, |
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100 '_pullbundle2extraprepare', pullbundle2extraprepare_widen) |
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101 |
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102 with wrappedextraprepare: |
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103 return orig(ui, repo, *args, **pycompat.strkwargs(opts)) |
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104 |
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105 def pullnarrowcmd(orig, ui, repo, *args, **opts): |
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106 """Wraps pull command to allow modifying narrow spec.""" |
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107 wrappedextraprepare = util.nullcontextmanager() |
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108 if repository.NARROW_REQUIREMENT in repo.requirements: |
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109 |
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110 def pullbundle2extraprepare_widen(orig, pullop, kwargs): |
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111 orig(pullop, kwargs) |
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112 if opts.get(r'depth'): |
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113 kwargs['depth'] = opts[r'depth'] |
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114 wrappedextraprepare = extensions.wrappedfunction(exchange, |
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115 '_pullbundle2extraprepare', pullbundle2extraprepare_widen) |
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116 |
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117 with wrappedextraprepare: |
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118 return orig(ui, repo, *args, **opts) |
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119 |
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120 def archivenarrowcmd(orig, ui, repo, *args, **opts): |
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121 """Wraps archive command to narrow the default includes.""" |
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122 if repository.NARROW_REQUIREMENT in repo.requirements: |
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123 repo_includes, repo_excludes = repo.narrowpats |
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124 includes = set(opts.get(r'include', [])) |
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125 excludes = set(opts.get(r'exclude', [])) |
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126 includes, excludes, unused_invalid = narrowspec.restrictpatterns( |
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127 includes, excludes, repo_includes, repo_excludes) |
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128 if includes: |
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129 opts[r'include'] = includes |
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130 if excludes: |
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131 opts[r'exclude'] = excludes |
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132 return orig(ui, repo, *args, **opts) |
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133 |
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134 def pullbundle2extraprepare(orig, pullop, kwargs): |
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135 repo = pullop.repo |
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136 if repository.NARROW_REQUIREMENT not in repo.requirements: |
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137 return orig(pullop, kwargs) |
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138 |
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139 if narrowwirepeer.NARROWCAP not in pullop.remote.capabilities(): |
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140 raise error.Abort(_("server doesn't support narrow clones")) |
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141 orig(pullop, kwargs) |
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142 kwargs['narrow'] = True |
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143 include, exclude = repo.narrowpats |
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144 kwargs['oldincludepats'] = include |
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145 kwargs['oldexcludepats'] = exclude |
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146 kwargs['includepats'] = include |
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147 kwargs['excludepats'] = exclude |
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148 # calculate known nodes only in ellipses cases because in non-ellipses cases |
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149 # we have all the nodes |
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150 if narrowwirepeer.ELLIPSESCAP in pullop.remote.capabilities(): |
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151 kwargs['known'] = [node.hex(ctx.node()) for ctx in |
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152 repo.set('::%ln', pullop.common) |
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153 if ctx.node() != node.nullid] |
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154 if not kwargs['known']: |
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155 # Mercurial serializes an empty list as '' and deserializes it as |
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156 # [''], so delete it instead to avoid handling the empty string on |
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157 # the server. |
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158 del kwargs['known'] |
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159 |
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160 extensions.wrapfunction(exchange,'_pullbundle2extraprepare', |
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161 pullbundle2extraprepare) |
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162 |
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163 # This is an extension point for filesystems that need to do something other |
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164 # than just blindly unlink the files. It's not clear what arguments would be |
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165 # useful, so we're passing in a fair number of them, some of them redundant. |
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166 def _narrowcleanupwdir(repo, oldincludes, oldexcludes, newincludes, newexcludes, |
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167 oldmatch, newmatch): |
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168 for f in repo.dirstate: |
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169 if not newmatch(f): |
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170 repo.dirstate.drop(f) |
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171 repo.wvfs.unlinkpath(f) |
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172 |
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173 def _narrow(ui, repo, remote, commoninc, oldincludes, oldexcludes, |
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174 newincludes, newexcludes, force): |
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175 oldmatch = narrowspec.match(repo.root, oldincludes, oldexcludes) |
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176 newmatch = narrowspec.match(repo.root, newincludes, newexcludes) |
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177 |
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178 # This is essentially doing "hg outgoing" to find all local-only |
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179 # commits. We will then check that the local-only commits don't |
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180 # have any changes to files that will be untracked. |
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181 unfi = repo.unfiltered() |
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182 outgoing = discovery.findcommonoutgoing(unfi, remote, |
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183 commoninc=commoninc) |
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184 ui.status(_('looking for local changes to affected paths\n')) |
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185 localnodes = [] |
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186 for n in itertools.chain(outgoing.missing, outgoing.excluded): |
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187 if any(oldmatch(f) and not newmatch(f) for f in unfi[n].files()): |
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188 localnodes.append(n) |
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189 revstostrip = unfi.revs('descendants(%ln)', localnodes) |
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190 hiddenrevs = repoview.filterrevs(repo, 'visible') |
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191 visibletostrip = list(repo.changelog.node(r) |
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192 for r in (revstostrip - hiddenrevs)) |
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193 if visibletostrip: |
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194 ui.status(_('The following changeset(s) or their ancestors have ' |
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195 'local changes not on the remote:\n')) |
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196 maxnodes = 10 |
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197 if ui.verbose or len(visibletostrip) <= maxnodes: |
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198 for n in visibletostrip: |
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199 ui.status('%s\n' % node.short(n)) |
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200 else: |
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201 for n in visibletostrip[:maxnodes]: |
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202 ui.status('%s\n' % node.short(n)) |
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203 ui.status(_('...and %d more, use --verbose to list all\n') % |
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204 (len(visibletostrip) - maxnodes)) |
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205 if not force: |
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206 raise error.Abort(_('local changes found'), |
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207 hint=_('use --force-delete-local-changes to ' |
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208 'ignore')) |
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209 |
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210 with ui.uninterruptable(): |
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211 if revstostrip: |
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212 tostrip = [unfi.changelog.node(r) for r in revstostrip] |
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213 if repo['.'].node() in tostrip: |
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214 # stripping working copy, so move to a different commit first |
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215 urev = max(repo.revs('(::%n) - %ln + null', |
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216 repo['.'].node(), visibletostrip)) |
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217 hg.clean(repo, urev) |
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218 repair.strip(ui, unfi, tostrip, topic='narrow') |
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219 |
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220 todelete = [] |
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221 for f, f2, size in repo.store.datafiles(): |
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222 if f.startswith('data/'): |
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223 file = f[5:-2] |
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224 if not newmatch(file): |
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225 todelete.append(f) |
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226 elif f.startswith('meta/'): |
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227 dir = f[5:-13] |
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228 dirs = ['.'] + sorted(util.dirs({dir})) + [dir] |
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229 include = True |
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230 for d in dirs: |
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231 visit = newmatch.visitdir(d) |
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232 if not visit: |
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233 include = False |
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234 break |
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235 if visit == 'all': |
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236 break |
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237 if not include: |
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238 todelete.append(f) |
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239 |
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240 repo.destroying() |
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241 |
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242 with repo.transaction("narrowing"): |
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243 for f in todelete: |
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244 ui.status(_('deleting %s\n') % f) |
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245 util.unlinkpath(repo.svfs.join(f)) |
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246 repo.store.markremoved(f) |
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247 |
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248 _narrowcleanupwdir(repo, oldincludes, oldexcludes, newincludes, |
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249 newexcludes, oldmatch, newmatch) |
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250 repo.setnarrowpats(newincludes, newexcludes) |
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251 |
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252 repo.destroyed() |
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253 |
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254 def _widen(ui, repo, remote, commoninc, newincludes, newexcludes): |
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255 newmatch = narrowspec.match(repo.root, newincludes, newexcludes) |
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256 |
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257 def pullbundle2extraprepare_widen(orig, pullop, kwargs): |
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258 orig(pullop, kwargs) |
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259 # The old{in,ex}cludepats have already been set by orig() |
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260 kwargs['includepats'] = newincludes |
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261 kwargs['excludepats'] = newexcludes |
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262 kwargs['widen'] = True |
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263 wrappedextraprepare = extensions.wrappedfunction(exchange, |
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264 '_pullbundle2extraprepare', pullbundle2extraprepare_widen) |
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265 |
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266 # define a function that narrowbundle2 can call after creating the |
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267 # backup bundle, but before applying the bundle from the server |
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268 def setnewnarrowpats(): |
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269 repo.setnarrowpats(newincludes, newexcludes) |
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270 repo.setnewnarrowpats = setnewnarrowpats |
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271 # silence the devel-warning of applying an empty changegroup |
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272 overrides = {('devel', 'all-warnings'): False} |
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273 |
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274 with ui.uninterruptable(): |
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275 ds = repo.dirstate |
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276 p1, p2 = ds.p1(), ds.p2() |
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277 with ds.parentchange(): |
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278 ds.setparents(node.nullid, node.nullid) |
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279 common = commoninc[0] |
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280 with wrappedextraprepare, repo.ui.configoverride(overrides, 'widen'): |
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281 exchange.pull(repo, remote, heads=common) |
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282 with ds.parentchange(): |
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283 ds.setparents(p1, p2) |
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284 |
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285 repo.setnewnarrowpats() |
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286 actions = {k: [] for k in 'a am f g cd dc r dm dg m e k p pr'.split()} |
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287 addgaction = actions['g'].append |
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288 |
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289 mf = repo['.'].manifest().matches(newmatch) |
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290 for f, fn in mf.iteritems(): |
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291 if f not in repo.dirstate: |
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292 addgaction((f, (mf.flags(f), False), |
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293 "add from widened narrow clone")) |
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294 |
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295 merge.applyupdates(repo, actions, wctx=repo[None], |
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296 mctx=repo['.'], overwrite=False) |
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297 merge.recordupdates(repo, actions, branchmerge=False) |
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298 |
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299 # TODO(rdamazio): Make new matcher format and update description |
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300 @command('tracked', |
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301 [('', 'addinclude', [], _('new paths to include')), |
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302 ('', 'removeinclude', [], _('old paths to no longer include')), |
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303 ('', 'addexclude', [], _('new paths to exclude')), |
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304 ('', 'import-rules', '', _('import narrowspecs from a file')), |
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305 ('', 'removeexclude', [], _('old paths to no longer exclude')), |
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306 ('', 'clear', False, _('whether to replace the existing narrowspec')), |
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307 ('', 'force-delete-local-changes', False, |
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308 _('forces deletion of local changes when narrowing')), |
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309 ] + commands.remoteopts, |
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310 _('[OPTIONS]... [REMOTE]'), |
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311 inferrepo=True) |
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312 def trackedcmd(ui, repo, remotepath=None, *pats, **opts): |
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313 """show or change the current narrowspec |
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314 |
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315 With no argument, shows the current narrowspec entries, one per line. Each |
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316 line will be prefixed with 'I' or 'X' for included or excluded patterns, |
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317 respectively. |
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318 |
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319 The narrowspec is comprised of expressions to match remote files and/or |
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320 directories that should be pulled into your client. |
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321 The narrowspec has *include* and *exclude* expressions, with excludes always |
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322 trumping includes: that is, if a file matches an exclude expression, it will |
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323 be excluded even if it also matches an include expression. |
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324 Excluding files that were never included has no effect. |
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325 |
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326 Each included or excluded entry is in the format described by |
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327 'hg help patterns'. |
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328 |
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329 The options allow you to add or remove included and excluded expressions. |
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330 |
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331 If --clear is specified, then all previous includes and excludes are DROPPED |
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332 and replaced by the new ones specified to --addinclude and --addexclude. |
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333 If --clear is specified without any further options, the narrowspec will be |
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334 empty and will not match any files. |
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335 """ |
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336 opts = pycompat.byteskwargs(opts) |
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337 if repository.NARROW_REQUIREMENT not in repo.requirements: |
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338 ui.warn(_('The narrow command is only supported on respositories cloned' |
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339 ' with --narrow.\n')) |
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340 return 1 |
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341 |
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342 # Before supporting, decide whether it "hg tracked --clear" should mean |
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343 # tracking no paths or all paths. |
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344 if opts['clear']: |
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345 ui.warn(_('The --clear option is not yet supported.\n')) |
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346 return 1 |
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347 |
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348 # import rules from a file |
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349 newrules = opts.get('import_rules') |
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350 if newrules: |
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351 try: |
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352 filepath = os.path.join(pycompat.getcwd(), newrules) |
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353 fdata = util.readfile(filepath) |
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354 except IOError as inst: |
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355 raise error.Abort(_("cannot read narrowspecs from '%s': %s") % |
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356 (filepath, encoding.strtolocal(inst.strerror))) |
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357 includepats, excludepats, profiles = sparse.parseconfig(ui, fdata, |
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358 'narrow') |
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359 if profiles: |
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360 raise error.Abort(_("including other spec files using '%include' " |
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361 "is not supported in narrowspec")) |
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362 opts['addinclude'].extend(includepats) |
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363 opts['addexclude'].extend(excludepats) |
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364 |
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365 addedincludes = narrowspec.parsepatterns(opts['addinclude']) |
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366 removedincludes = narrowspec.parsepatterns(opts['removeinclude']) |
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367 addedexcludes = narrowspec.parsepatterns(opts['addexclude']) |
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368 removedexcludes = narrowspec.parsepatterns(opts['removeexclude']) |
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369 widening = addedincludes or removedexcludes |
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370 narrowing = removedincludes or addedexcludes |
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371 only_show = not widening and not narrowing |
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372 |
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373 # Only print the current narrowspec. |
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374 if only_show: |
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375 include, exclude = repo.narrowpats |
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376 |
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377 ui.pager('tracked') |
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378 fm = ui.formatter('narrow', opts) |
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379 for i in sorted(include): |
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380 fm.startitem() |
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381 fm.write('status', '%s ', 'I', label='narrow.included') |
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382 fm.write('pat', '%s\n', i, label='narrow.included') |
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383 for i in sorted(exclude): |
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384 fm.startitem() |
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385 fm.write('status', '%s ', 'X', label='narrow.excluded') |
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386 fm.write('pat', '%s\n', i, label='narrow.excluded') |
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387 fm.end() |
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388 return 0 |
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389 |
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390 with repo.wlock(), repo.lock(): |
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391 cmdutil.bailifchanged(repo) |
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392 |
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393 # Find the revisions we have in common with the remote. These will |
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394 # be used for finding local-only changes for narrowing. They will |
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395 # also define the set of revisions to update for widening. |
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396 remotepath = ui.expandpath(remotepath or 'default') |
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397 url, branches = hg.parseurl(remotepath) |
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398 ui.status(_('comparing with %s\n') % util.hidepassword(url)) |
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399 remote = hg.peer(repo, opts, url) |
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400 commoninc = discovery.findcommonincoming(repo, remote) |
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401 |
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402 oldincludes, oldexcludes = repo.narrowpats |
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403 if narrowing: |
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404 newincludes = oldincludes - removedincludes |
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405 newexcludes = oldexcludes | addedexcludes |
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406 _narrow(ui, repo, remote, commoninc, oldincludes, oldexcludes, |
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407 newincludes, newexcludes, |
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408 opts['force_delete_local_changes']) |
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409 # _narrow() updated the narrowspec and _widen() below needs to |
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410 # use the updated values as its base (otherwise removed includes |
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411 # and addedexcludes will be lost in the resulting narrowspec) |
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412 oldincludes = newincludes |
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413 oldexcludes = newexcludes |
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414 |
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415 if widening: |
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416 newincludes = oldincludes | addedincludes |
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417 newexcludes = oldexcludes - removedexcludes |
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418 _widen(ui, repo, remote, commoninc, newincludes, newexcludes) |
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419 |
a2a6e724d61a
narrow: import experimental extension from narrowhg revision cb51d673e9c5
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
420 return 0 |