Mercurial > hg
annotate mercurial/sparse.py @ 33321:d09e948dc303
sparse: move pruning of temporary includes into core
This was our last method on the custom repo type, meaning we could
remove that custom type and inline the 2 lines of code into
reposetup().
As part of the move, instead of wrapping merge.update() from
the sparse extension, we inline the function call. The ported
function now no-ops if sparse isn't enabled, making it safe to
always call.
The call site in update() may not be the most appropriate. But
it matches the previous behavior, which is the safest thing
to do. It can be improved later.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Thu, 06 Jul 2017 14:33:18 -0700 |
parents | 153456f02426 |
children | fa6c2c3064fd |
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 import collections |
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11 import hashlib |
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12 import os |
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13 |
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14 from .i18n import _ |
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15 from .node import nullid |
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16 from . import ( |
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17 error, |
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18 match as matchmod, |
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19 merge as mergemod, |
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20 pycompat, |
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21 ) |
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22 |
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23 # Whether sparse features are enabled. This variable is intended to be |
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24 # temporary to facilitate porting sparse to core. It should eventually be |
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25 # a per-repo option, possibly a repo requirement. |
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26 enabled = False |
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27 |
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28 def parseconfig(ui, raw): |
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29 """Parse sparse config file content. |
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30 |
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31 Returns a tuple of includes, excludes, and profiles. |
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32 """ |
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33 includes = set() |
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34 excludes = set() |
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35 current = includes |
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36 profiles = [] |
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37 for line in raw.split('\n'): |
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38 line = line.strip() |
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39 if not line or line.startswith('#'): |
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40 # empty or comment line, skip |
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41 continue |
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42 elif line.startswith('%include '): |
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43 line = line[9:].strip() |
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44 if line: |
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45 profiles.append(line) |
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46 elif line == '[include]': |
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47 if current != includes: |
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48 # TODO pass filename into this API so we can report it. |
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49 raise error.Abort(_('sparse config cannot have includes ' + |
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50 'after excludes')) |
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51 continue |
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52 elif line == '[exclude]': |
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53 current = excludes |
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54 elif line: |
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55 if line.strip().startswith('/'): |
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56 ui.warn(_('warning: sparse profile cannot use' + |
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57 ' paths starting with /, ignoring %s\n') % line) |
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58 continue |
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59 current.add(line) |
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60 |
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61 return includes, excludes, profiles |
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62 |
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63 # Exists as separate function to facilitate monkeypatching. |
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64 def readprofile(repo, profile, changeid): |
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65 """Resolve the raw content of a sparse profile file.""" |
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66 # TODO add some kind of cache here because this incurs a manifest |
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67 # resolve and can be slow. |
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68 return repo.filectx(profile, changeid=changeid).data() |
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69 |
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70 def patternsforrev(repo, rev): |
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71 """Obtain sparse checkout patterns for the given rev. |
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72 |
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73 Returns a tuple of iterables representing includes, excludes, and |
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74 patterns. |
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75 """ |
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76 # Feature isn't enabled. No-op. |
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77 if not enabled: |
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78 return set(), set(), [] |
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79 |
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80 raw = repo.vfs.tryread('sparse') |
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81 if not raw: |
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82 return set(), set(), [] |
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83 |
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84 if rev is None: |
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85 raise error.Abort(_('cannot parse sparse patterns from working ' |
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86 'directory')) |
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87 |
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88 includes, excludes, profiles = parseconfig(repo.ui, raw) |
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89 ctx = repo[rev] |
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90 |
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91 if profiles: |
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92 visited = set() |
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93 while profiles: |
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94 profile = profiles.pop() |
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95 if profile in visited: |
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96 continue |
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97 |
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98 visited.add(profile) |
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99 |
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100 try: |
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101 raw = readprofile(repo, profile, rev) |
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102 except error.ManifestLookupError: |
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103 msg = ( |
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104 "warning: sparse profile '%s' not found " |
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105 "in rev %s - ignoring it\n" % (profile, ctx)) |
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106 # experimental config: sparse.missingwarning |
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107 if repo.ui.configbool( |
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108 'sparse', 'missingwarning', True): |
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109 repo.ui.warn(msg) |
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110 else: |
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111 repo.ui.debug(msg) |
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112 continue |
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113 |
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114 pincludes, pexcludes, subprofs = parseconfig(repo.ui, raw) |
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115 includes.update(pincludes) |
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116 excludes.update(pexcludes) |
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117 for subprofile in subprofs: |
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118 profiles.append(subprofile) |
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119 |
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120 profiles = visited |
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121 |
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122 if includes: |
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123 includes.add('.hg*') |
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124 |
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125 return includes, excludes, profiles |
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126 |
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127 def activeprofiles(repo): |
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128 revs = [repo.changelog.rev(node) for node in |
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129 repo.dirstate.parents() if node != nullid] |
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130 |
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131 profiles = set() |
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132 for rev in revs: |
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133 profiles.update(patternsforrev(repo, rev)[2]) |
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134 |
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135 return profiles |
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136 |
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137 def invalidatesignaturecache(repo): |
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138 repo._sparsesignaturecache.clear() |
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139 |
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140 def configsignature(repo, includetemp=True): |
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141 """Obtain the signature string for the current sparse configuration. |
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142 |
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143 This is used to construct a cache key for matchers. |
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144 """ |
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145 cache = repo._sparsesignaturecache |
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146 |
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147 signature = cache.get('signature') |
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148 |
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149 if includetemp: |
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150 tempsignature = cache.get('tempsignature') |
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151 else: |
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152 tempsignature = '0' |
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153 |
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154 if signature is None or (includetemp and tempsignature is None): |
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155 signature = hashlib.sha1(repo.vfs.tryread('sparse')).hexdigest() |
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156 cache['signature'] = signature |
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157 |
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158 if includetemp: |
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159 raw = repo.vfs.tryread('tempsparse') |
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160 tempsignature = hashlib.sha1(raw).hexdigest() |
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161 cache['tempsignature'] = tempsignature |
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162 |
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163 return '%s %s' % (signature, tempsignature) |
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164 |
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165 def writeconfig(repo, includes, excludes, profiles): |
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166 """Write the sparse config file given a sparse configuration.""" |
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167 with repo.vfs('sparse', 'wb') as fh: |
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168 for p in sorted(profiles): |
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169 fh.write('%%include %s\n' % p) |
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170 |
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171 if includes: |
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172 fh.write('[include]\n') |
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173 for i in sorted(includes): |
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174 fh.write(i) |
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175 fh.write('\n') |
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176 |
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177 if excludes: |
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178 fh.write('[exclude]\n') |
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179 for e in sorted(excludes): |
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180 fh.write(e) |
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181 fh.write('\n') |
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182 |
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183 invalidatesignaturecache(repo) |
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184 |
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185 def readtemporaryincludes(repo): |
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186 raw = repo.vfs.tryread('tempsparse') |
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187 if not raw: |
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188 return set() |
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189 |
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190 return set(raw.split('\n')) |
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191 |
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192 def writetemporaryincludes(repo, includes): |
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193 repo.vfs.write('tempsparse', '\n'.join(sorted(includes))) |
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194 invalidatesignaturecache(repo) |
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195 |
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196 def addtemporaryincludes(repo, additional): |
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197 includes = readtemporaryincludes(repo) |
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198 for i in additional: |
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199 includes.add(i) |
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200 writetemporaryincludes(repo, includes) |
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201 |
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202 def prunetemporaryincludes(repo): |
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203 if not enabled or not repo.vfs.exists('tempsparse'): |
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204 return |
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205 |
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206 origstatus = repo.status() |
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207 modified, added, removed, deleted, a, b, c = origstatus |
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208 if modified or added or removed or deleted: |
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209 # Still have pending changes. Don't bother trying to prune. |
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210 return |
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211 |
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212 sparsematch = matcher(repo, includetemp=False) |
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213 dirstate = repo.dirstate |
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214 actions = [] |
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215 dropped = [] |
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216 tempincludes = readtemporaryincludes(repo) |
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217 for file in tempincludes: |
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218 if file in dirstate and not sparsematch(file): |
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219 message = _('dropping temporarily included sparse files') |
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220 actions.append((file, None, message)) |
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221 dropped.append(file) |
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222 |
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223 typeactions = collections.defaultdict(list) |
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224 typeactions['r'] = actions |
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225 mergemod.applyupdates(repo, typeactions, repo[None], repo['.'], False) |
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226 |
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227 # Fix dirstate |
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228 for file in dropped: |
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229 dirstate.drop(file) |
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230 |
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231 repo.vfs.unlink('tempsparse') |
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232 invalidatesignaturecache(repo) |
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233 msg = _('cleaned up %d temporarily added file(s) from the ' |
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234 'sparse checkout\n') |
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235 repo.ui.status(msg % len(tempincludes)) |
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236 |
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237 def matcher(repo, revs=None, includetemp=True): |
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238 """Obtain a matcher for sparse working directories for the given revs. |
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239 |
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240 If multiple revisions are specified, the matcher is the union of all |
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241 revs. |
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242 |
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243 ``includetemp`` indicates whether to use the temporary sparse profile. |
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244 """ |
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245 # If sparse isn't enabled, sparse matcher matches everything. |
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246 if not enabled: |
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247 return matchmod.always(repo.root, '') |
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248 |
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249 if not revs or revs == [None]: |
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250 revs = [repo.changelog.rev(node) |
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251 for node in repo.dirstate.parents() if node != nullid] |
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252 |
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253 signature = configsignature(repo, includetemp=includetemp) |
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254 |
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255 key = '%s %s' % (signature, ' '.join(map(pycompat.bytestr, revs))) |
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256 |
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257 result = repo._sparsematchercache.get(key) |
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258 if result: |
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259 return result |
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260 |
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261 matchers = [] |
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262 for rev in revs: |
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263 try: |
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264 includes, excludes, profiles = patternsforrev(repo, rev) |
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265 |
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266 if includes or excludes: |
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267 # Explicitly include subdirectories of includes so |
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268 # status will walk them down to the actual include. |
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269 subdirs = set() |
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270 for include in includes: |
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271 # TODO consider using posix path functions here so Windows |
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272 # \ directory separators don't come into play. |
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273 dirname = os.path.dirname(include) |
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274 # basename is used to avoid issues with absolute |
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275 # paths (which on Windows can include the drive). |
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276 while os.path.basename(dirname): |
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277 subdirs.add(dirname) |
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278 dirname = os.path.dirname(dirname) |
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279 |
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280 matcher = matchmod.match(repo.root, '', [], |
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281 include=includes, exclude=excludes, |
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282 default='relpath') |
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283 if subdirs: |
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284 matcher = matchmod.forceincludematcher(matcher, subdirs) |
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285 matchers.append(matcher) |
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286 except IOError: |
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287 pass |
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288 |
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289 if not matchers: |
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290 result = matchmod.always(repo.root, '') |
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291 elif len(matchers) == 1: |
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292 result = matchers[0] |
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293 else: |
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294 result = matchmod.unionmatcher(matchers) |
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295 |
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296 if includetemp: |
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297 tempincludes = readtemporaryincludes(repo) |
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298 result = matchmod.forceincludematcher(result, tempincludes) |
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299 |
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300 repo._sparsematchercache[key] = result |
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301 |
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302 return result |