annotate mercurial/sparse.py @ 33304:3e1accab7447

sparse: move some temporary includes functions into core Functions for reading and writing the tempsparse file have been moved. prunetemporaryincludes() will be moved separately because it is non-trivial.
author Gregory Szorc <gregory.szorc@gmail.com>
date Thu, 06 Jul 2017 14:48:16 -0700
parents 8b571495d811
children df1287268cc0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # sparse.py - functionality for sparse checkouts
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2 #
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3 # Copyright 2014 Facebook, Inc.
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 from .i18n import _
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11 from .node import nullid
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12 from . import (
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13 error,
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14 )
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15
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16 # Whether sparse features are enabled. This variable is intended to be
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17 # temporary to facilitate porting sparse to core. It should eventually be
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18 # a per-repo option, possibly a repo requirement.
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19 enabled = False
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20
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21 def parseconfig(ui, raw):
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22 """Parse sparse config file content.
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23
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24 Returns a tuple of includes, excludes, and profiles.
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25 """
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26 includes = set()
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27 excludes = set()
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28 current = includes
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29 profiles = []
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30 for line in raw.split('\n'):
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31 line = line.strip()
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32 if not line or line.startswith('#'):
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33 # empty or comment line, skip
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34 continue
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35 elif line.startswith('%include '):
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36 line = line[9:].strip()
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37 if line:
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38 profiles.append(line)
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39 elif line == '[include]':
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40 if current != includes:
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41 # TODO pass filename into this API so we can report it.
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42 raise error.Abort(_('sparse config cannot have includes ' +
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43 'after excludes'))
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44 continue
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45 elif line == '[exclude]':
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46 current = excludes
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47 elif line:
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48 if line.strip().startswith('/'):
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49 ui.warn(_('warning: sparse profile cannot use' +
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50 ' paths starting with /, ignoring %s\n') % line)
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51 continue
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52 current.add(line)
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53
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54 return includes, excludes, profiles
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55
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56 # Exists as separate function to facilitate monkeypatching.
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57 def readprofile(repo, profile, changeid):
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58 """Resolve the raw content of a sparse profile file."""
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59 # TODO add some kind of cache here because this incurs a manifest
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60 # resolve and can be slow.
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61 return repo.filectx(profile, changeid=changeid).data()
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62
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63 def patternsforrev(repo, rev):
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64 """Obtain sparse checkout patterns for the given rev.
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65
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66 Returns a tuple of iterables representing includes, excludes, and
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67 patterns.
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68 """
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69 # Feature isn't enabled. No-op.
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70 if not enabled:
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71 return set(), set(), []
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72
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73 raw = repo.vfs.tryread('sparse')
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74 if not raw:
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75 return set(), set(), []
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76
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77 if rev is None:
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78 raise error.Abort(_('cannot parse sparse patterns from working '
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79 'directory'))
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80
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81 includes, excludes, profiles = parseconfig(repo.ui, raw)
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82 ctx = repo[rev]
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83
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84 if profiles:
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85 visited = set()
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86 while profiles:
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87 profile = profiles.pop()
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88 if profile in visited:
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89 continue
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90
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91 visited.add(profile)
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92
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93 try:
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94 raw = readprofile(repo, profile, rev)
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95 except error.ManifestLookupError:
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96 msg = (
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97 "warning: sparse profile '%s' not found "
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98 "in rev %s - ignoring it\n" % (profile, ctx))
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99 # experimental config: sparse.missingwarning
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100 if repo.ui.configbool(
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101 'sparse', 'missingwarning', True):
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102 repo.ui.warn(msg)
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103 else:
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104 repo.ui.debug(msg)
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105 continue
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106
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107 pincludes, pexcludes, subprofs = parseconfig(repo.ui, raw)
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108 includes.update(pincludes)
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109 excludes.update(pexcludes)
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110 for subprofile in subprofs:
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111 profiles.append(subprofile)
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112
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113 profiles = visited
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114
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115 if includes:
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116 includes.add('.hg*')
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117
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118 return includes, excludes, profiles
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119
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120 def activeprofiles(repo):
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121 revs = [repo.changelog.rev(node) for node in
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122 repo.dirstate.parents() if node != nullid]
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123
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124 profiles = set()
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125 for rev in revs:
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126 profiles.update(patternsforrev(repo, rev)[2])
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127
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128 return profiles
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129
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130 def invalidatesignaturecache(repo):
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131 repo._sparsesignaturecache.clear()
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132
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133 def writeconfig(repo, includes, excludes, profiles):
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134 """Write the sparse config file given a sparse configuration."""
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135 with repo.vfs('sparse', 'wb') as fh:
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136 for p in sorted(profiles):
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137 fh.write('%%include %s\n' % p)
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138
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139 if includes:
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140 fh.write('[include]\n')
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141 for i in sorted(includes):
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142 fh.write(i)
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143 fh.write('\n')
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144
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145 if excludes:
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146 fh.write('[exclude]\n')
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147 for e in sorted(excludes):
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148 fh.write(e)
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149 fh.write('\n')
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150
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151 invalidatesignaturecache(repo)
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152
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153 def readtemporaryincludes(repo):
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154 raw = repo.vfs.tryread('tempsparse')
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155 if not raw:
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156 return set()
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157
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158 return set(raw.split('\n'))
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159
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160 def writetemporaryincludes(repo, includes):
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161 repo.vfs.write('tempsparse', '\n'.join(sorted(includes)))
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162 invalidatesignaturecache(repo)
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163
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164 def addtemporaryincludes(repo, additional):
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165 includes = readtemporaryincludes(repo)
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166 for i in additional:
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167 includes.add(i)
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168 writetemporaryincludes(repo, includes)