Mercurial > hg
annotate mercurial/sparse.py @ 33371:c6415195fa78
sparse: move code for importing rules from files into core
This is a pretty straightforward port. Some code cleanup was
performed. But no major changes to the logic were made.
I'm not a huge fan of this function because it does multiple
things. I'd like to get things into core first to facilitate
refactoring later.
Please also note the added inline comment about the oddities
of writeconfig() and the try..except to undo it. This is because
of the hackiness in which the sparse matcher is obtained by
various consumers, notably dirstate. We'll need a massive
refactor to address this. That refactor is effectively blocked
on having the sparse dirstate hacks live in core.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sat, 08 Jul 2017 14:15:07 -0700 |
parents | 482320104672 |
children | 4dc04cdf2520 |
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 util, |
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22 ) |
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23 |
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24 # Whether sparse features are enabled. This variable is intended to be |
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25 # temporary to facilitate porting sparse to core. It should eventually be |
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26 # a per-repo option, possibly a repo requirement. |
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27 enabled = False |
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28 |
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29 def parseconfig(ui, raw): |
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30 """Parse sparse config file content. |
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31 |
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32 Returns a tuple of includes, excludes, and profiles. |
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33 """ |
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34 includes = set() |
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35 excludes = set() |
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36 current = includes |
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37 profiles = [] |
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38 for line in raw.split('\n'): |
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39 line = line.strip() |
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40 if not line or line.startswith('#'): |
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41 # empty or comment line, skip |
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42 continue |
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43 elif line.startswith('%include '): |
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44 line = line[9:].strip() |
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45 if line: |
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46 profiles.append(line) |
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47 elif line == '[include]': |
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48 if current != includes: |
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49 # TODO pass filename into this API so we can report it. |
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50 raise error.Abort(_('sparse config cannot have includes ' + |
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51 'after excludes')) |
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52 continue |
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53 elif line == '[exclude]': |
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54 current = excludes |
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55 elif line: |
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56 if line.strip().startswith('/'): |
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57 ui.warn(_('warning: sparse profile cannot use' + |
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58 ' paths starting with /, ignoring %s\n') % line) |
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59 continue |
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60 current.add(line) |
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61 |
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62 return includes, excludes, profiles |
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63 |
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64 # Exists as separate function to facilitate monkeypatching. |
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65 def readprofile(repo, profile, changeid): |
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66 """Resolve the raw content of a sparse profile file.""" |
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67 # TODO add some kind of cache here because this incurs a manifest |
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68 # resolve and can be slow. |
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69 return repo.filectx(profile, changeid=changeid).data() |
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70 |
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71 def patternsforrev(repo, rev): |
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72 """Obtain sparse checkout patterns for the given rev. |
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73 |
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74 Returns a tuple of iterables representing includes, excludes, and |
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75 patterns. |
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76 """ |
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77 # Feature isn't enabled. No-op. |
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78 if not enabled: |
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79 return set(), set(), [] |
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80 |
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81 raw = repo.vfs.tryread('sparse') |
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82 if not raw: |
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83 return set(), set(), [] |
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84 |
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85 if rev is None: |
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86 raise error.Abort(_('cannot parse sparse patterns from working ' |
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87 'directory')) |
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88 |
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89 includes, excludes, profiles = parseconfig(repo.ui, raw) |
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90 ctx = repo[rev] |
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91 |
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92 if profiles: |
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93 visited = set() |
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94 while profiles: |
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95 profile = profiles.pop() |
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96 if profile in visited: |
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97 continue |
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98 |
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99 visited.add(profile) |
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100 |
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101 try: |
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102 raw = readprofile(repo, profile, rev) |
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103 except error.ManifestLookupError: |
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104 msg = ( |
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105 "warning: sparse profile '%s' not found " |
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106 "in rev %s - ignoring it\n" % (profile, ctx)) |
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107 # experimental config: sparse.missingwarning |
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108 if repo.ui.configbool( |
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109 'sparse', 'missingwarning', True): |
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110 repo.ui.warn(msg) |
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111 else: |
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112 repo.ui.debug(msg) |
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113 continue |
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114 |
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115 pincludes, pexcludes, subprofs = parseconfig(repo.ui, raw) |
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116 includes.update(pincludes) |
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117 excludes.update(pexcludes) |
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118 for subprofile in subprofs: |
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119 profiles.append(subprofile) |
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120 |
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121 profiles = visited |
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122 |
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123 if includes: |
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124 includes.add('.hg*') |
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125 |
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126 return includes, excludes, profiles |
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127 |
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128 def activeconfig(repo): |
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129 """Determine the active sparse config rules. |
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130 |
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131 Rules are constructed by reading the current sparse config and bringing in |
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132 referenced profiles from parents of the working directory. |
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133 """ |
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134 revs = [repo.changelog.rev(node) for node in |
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135 repo.dirstate.parents() if node != nullid] |
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136 |
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137 allincludes = set() |
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138 allexcludes = set() |
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139 allprofiles = set() |
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140 |
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141 for rev in revs: |
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142 includes, excludes, profiles = patternsforrev(repo, rev) |
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143 allincludes |= includes |
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144 allexcludes |= excludes |
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145 allprofiles |= set(profiles) |
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146 |
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147 return allincludes, allexcludes, allprofiles |
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148 |
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149 def configsignature(repo, includetemp=True): |
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150 """Obtain the signature string for the current sparse configuration. |
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151 |
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152 This is used to construct a cache key for matchers. |
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153 """ |
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154 cache = repo._sparsesignaturecache |
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155 |
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156 signature = cache.get('signature') |
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157 |
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158 if includetemp: |
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159 tempsignature = cache.get('tempsignature') |
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160 else: |
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161 tempsignature = '0' |
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162 |
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163 if signature is None or (includetemp and tempsignature is None): |
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164 signature = hashlib.sha1(repo.vfs.tryread('sparse')).hexdigest() |
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165 cache['signature'] = signature |
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166 |
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167 if includetemp: |
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168 raw = repo.vfs.tryread('tempsparse') |
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169 tempsignature = hashlib.sha1(raw).hexdigest() |
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170 cache['tempsignature'] = tempsignature |
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171 |
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172 return '%s %s' % (signature, tempsignature) |
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173 |
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174 def writeconfig(repo, includes, excludes, profiles): |
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175 """Write the sparse config file given a sparse configuration.""" |
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176 with repo.vfs('sparse', 'wb') as fh: |
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177 for p in sorted(profiles): |
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178 fh.write('%%include %s\n' % p) |
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179 |
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180 if includes: |
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181 fh.write('[include]\n') |
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182 for i in sorted(includes): |
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183 fh.write(i) |
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184 fh.write('\n') |
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185 |
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186 if excludes: |
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187 fh.write('[exclude]\n') |
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188 for e in sorted(excludes): |
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189 fh.write(e) |
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190 fh.write('\n') |
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191 |
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192 repo._sparsesignaturecache.clear() |
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193 |
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194 def readtemporaryincludes(repo): |
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195 raw = repo.vfs.tryread('tempsparse') |
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196 if not raw: |
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197 return set() |
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198 |
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199 return set(raw.split('\n')) |
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200 |
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201 def writetemporaryincludes(repo, includes): |
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202 repo.vfs.write('tempsparse', '\n'.join(sorted(includes))) |
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203 repo._sparsesignaturecache.clear() |
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204 |
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205 def addtemporaryincludes(repo, additional): |
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206 includes = readtemporaryincludes(repo) |
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207 for i in additional: |
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208 includes.add(i) |
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209 writetemporaryincludes(repo, includes) |
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210 |
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211 def prunetemporaryincludes(repo): |
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212 if not enabled or not repo.vfs.exists('tempsparse'): |
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213 return |
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214 |
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215 s = repo.status() |
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216 if s.modified or s.added or s.removed or s.deleted: |
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217 # Still have pending changes. Don't bother trying to prune. |
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218 return |
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219 |
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220 sparsematch = matcher(repo, includetemp=False) |
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221 dirstate = repo.dirstate |
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222 actions = [] |
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223 dropped = [] |
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224 tempincludes = readtemporaryincludes(repo) |
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225 for file in tempincludes: |
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226 if file in dirstate and not sparsematch(file): |
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227 message = _('dropping temporarily included sparse files') |
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228 actions.append((file, None, message)) |
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229 dropped.append(file) |
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230 |
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231 typeactions = collections.defaultdict(list) |
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232 typeactions['r'] = actions |
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233 mergemod.applyupdates(repo, typeactions, repo[None], repo['.'], False) |
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234 |
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235 # Fix dirstate |
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236 for file in dropped: |
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237 dirstate.drop(file) |
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238 |
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239 repo.vfs.unlink('tempsparse') |
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240 repo._sparsesignaturecache.clear() |
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241 msg = _('cleaned up %d temporarily added file(s) from the ' |
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242 'sparse checkout\n') |
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243 repo.ui.status(msg % len(tempincludes)) |
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244 |
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245 def matcher(repo, revs=None, includetemp=True): |
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246 """Obtain a matcher for sparse working directories for the given revs. |
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247 |
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248 If multiple revisions are specified, the matcher is the union of all |
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249 revs. |
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250 |
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251 ``includetemp`` indicates whether to use the temporary sparse profile. |
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252 """ |
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253 # If sparse isn't enabled, sparse matcher matches everything. |
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254 if not enabled: |
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255 return matchmod.always(repo.root, '') |
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256 |
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257 if not revs or revs == [None]: |
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258 revs = [repo.changelog.rev(node) |
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259 for node in repo.dirstate.parents() if node != nullid] |
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260 |
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261 signature = configsignature(repo, includetemp=includetemp) |
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262 |
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263 key = '%s %s' % (signature, ' '.join(map(pycompat.bytestr, revs))) |
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264 |
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265 result = repo._sparsematchercache.get(key) |
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266 if result: |
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267 return result |
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268 |
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269 matchers = [] |
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270 for rev in revs: |
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271 try: |
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272 includes, excludes, profiles = patternsforrev(repo, rev) |
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273 |
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274 if includes or excludes: |
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275 # Explicitly include subdirectories of includes so |
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276 # status will walk them down to the actual include. |
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277 subdirs = set() |
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278 for include in includes: |
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279 # TODO consider using posix path functions here so Windows |
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280 # \ directory separators don't come into play. |
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281 dirname = os.path.dirname(include) |
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282 # basename is used to avoid issues with absolute |
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283 # paths (which on Windows can include the drive). |
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284 while os.path.basename(dirname): |
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285 subdirs.add(dirname) |
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286 dirname = os.path.dirname(dirname) |
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287 |
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288 matcher = matchmod.match(repo.root, '', [], |
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289 include=includes, exclude=excludes, |
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290 default='relpath') |
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291 if subdirs: |
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292 matcher = matchmod.forceincludematcher(matcher, subdirs) |
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293 matchers.append(matcher) |
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294 except IOError: |
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295 pass |
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296 |
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297 if not matchers: |
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298 result = matchmod.always(repo.root, '') |
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299 elif len(matchers) == 1: |
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300 result = matchers[0] |
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301 else: |
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302 result = matchmod.unionmatcher(matchers) |
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303 |
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304 if includetemp: |
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305 tempincludes = readtemporaryincludes(repo) |
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306 result = matchmod.forceincludematcher(result, tempincludes) |
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307 |
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308 repo._sparsematchercache[key] = result |
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309 |
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310 return result |
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311 |
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312 def filterupdatesactions(repo, wctx, mctx, branchmerge, actions): |
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313 """Filter updates to only lay out files that match the sparse rules.""" |
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314 if not enabled: |
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315 return actions |
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316 |
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317 oldrevs = [pctx.rev() for pctx in wctx.parents()] |
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318 oldsparsematch = matcher(repo, oldrevs) |
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319 |
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320 if oldsparsematch.always(): |
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321 return actions |
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322 |
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323 files = set() |
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324 prunedactions = {} |
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325 |
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326 if branchmerge: |
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327 # If we're merging, use the wctx filter, since we're merging into |
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328 # the wctx. |
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329 sparsematch = matcher(repo, [wctx.parents()[0].rev()]) |
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330 else: |
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331 # If we're updating, use the target context's filter, since we're |
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332 # moving to the target context. |
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333 sparsematch = matcher(repo, [mctx.rev()]) |
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334 |
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335 temporaryfiles = [] |
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336 for file, action in actions.iteritems(): |
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337 type, args, msg = action |
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338 files.add(file) |
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339 if sparsematch(file): |
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340 prunedactions[file] = action |
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341 elif type == 'm': |
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342 temporaryfiles.append(file) |
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343 prunedactions[file] = action |
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344 elif branchmerge: |
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345 if type != 'k': |
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346 temporaryfiles.append(file) |
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347 prunedactions[file] = action |
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348 elif type == 'f': |
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349 prunedactions[file] = action |
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350 elif file in wctx: |
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351 prunedactions[file] = ('r', args, msg) |
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352 |
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353 if len(temporaryfiles) > 0: |
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354 repo.ui.status(_('temporarily included %d file(s) in the sparse ' |
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355 'checkout for merging\n') % len(temporaryfiles)) |
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356 addtemporaryincludes(repo, temporaryfiles) |
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357 |
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358 # Add the new files to the working copy so they can be merged, etc |
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359 actions = [] |
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360 message = 'temporarily adding to sparse checkout' |
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361 wctxmanifest = repo[None].manifest() |
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362 for file in temporaryfiles: |
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363 if file in wctxmanifest: |
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364 fctx = repo[None][file] |
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365 actions.append((file, (fctx.flags(), False), message)) |
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366 |
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367 typeactions = collections.defaultdict(list) |
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368 typeactions['g'] = actions |
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369 mergemod.applyupdates(repo, typeactions, repo[None], repo['.'], |
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370 False) |
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371 |
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372 dirstate = repo.dirstate |
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373 for file, flags, msg in actions: |
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374 dirstate.normal(file) |
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375 |
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376 profiles = activeconfig(repo)[2] |
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377 changedprofiles = profiles & files |
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378 # If an active profile changed during the update, refresh the checkout. |
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379 # Don't do this during a branch merge, since all incoming changes should |
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380 # have been handled by the temporary includes above. |
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381 if changedprofiles and not branchmerge: |
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382 mf = mctx.manifest() |
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383 for file in mf: |
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384 old = oldsparsematch(file) |
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385 new = sparsematch(file) |
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386 if not old and new: |
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387 flags = mf.flags(file) |
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388 prunedactions[file] = ('g', (flags, False), '') |
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389 elif old and not new: |
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390 prunedactions[file] = ('r', [], '') |
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391 |
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392 return prunedactions |
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393 |
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394 def refreshwdir(repo, origstatus, origsparsematch, force=False): |
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395 """Refreshes working directory by taking sparse config into account. |
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396 |
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397 The old status and sparse matcher is compared against the current sparse |
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398 matcher. |
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399 |
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400 Will abort if a file with pending changes is being excluded or included |
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401 unless ``force`` is True. |
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402 """ |
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403 # Verify there are no pending changes |
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404 pending = set() |
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405 pending.update(origstatus.modified) |
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406 pending.update(origstatus.added) |
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407 pending.update(origstatus.removed) |
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408 sparsematch = matcher(repo) |
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409 abort = False |
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410 |
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411 for f in pending: |
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412 if not sparsematch(f): |
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413 repo.ui.warn(_("pending changes to '%s'\n") % f) |
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414 abort = not force |
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415 |
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416 if abort: |
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417 raise error.Abort(_('could not update sparseness due to pending ' |
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418 'changes')) |
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419 |
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420 # Calculate actions |
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421 dirstate = repo.dirstate |
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422 ctx = repo['.'] |
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423 added = [] |
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424 lookup = [] |
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425 dropped = [] |
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426 mf = ctx.manifest() |
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427 files = set(mf) |
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428 |
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429 actions = {} |
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430 |
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431 for file in files: |
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432 old = origsparsematch(file) |
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433 new = sparsematch(file) |
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434 # Add files that are newly included, or that don't exist in |
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435 # the dirstate yet. |
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436 if (new and not old) or (old and new and not file in dirstate): |
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437 fl = mf.flags(file) |
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438 if repo.wvfs.exists(file): |
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439 actions[file] = ('e', (fl,), '') |
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440 lookup.append(file) |
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441 else: |
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442 actions[file] = ('g', (fl, False), '') |
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443 added.append(file) |
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444 # Drop files that are newly excluded, or that still exist in |
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445 # the dirstate. |
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446 elif (old and not new) or (not old and not new and file in dirstate): |
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447 dropped.append(file) |
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448 if file not in pending: |
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449 actions[file] = ('r', [], '') |
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450 |
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451 # Verify there are no pending changes in newly included files |
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452 abort = False |
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453 for file in lookup: |
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454 repo.ui.warn(_("pending changes to '%s'\n") % file) |
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455 abort = not force |
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456 if abort: |
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457 raise error.Abort(_('cannot change sparseness due to pending ' |
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458 'changes (delete the files or use ' |
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459 '--force to bring them back dirty)')) |
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460 |
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461 # Check for files that were only in the dirstate. |
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462 for file, state in dirstate.iteritems(): |
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463 if not file in files: |
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464 old = origsparsematch(file) |
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465 new = sparsematch(file) |
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466 if old and not new: |
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467 dropped.append(file) |
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468 |
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469 # Apply changes to disk |
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470 typeactions = dict((m, []) for m in 'a f g am cd dc r dm dg m e k'.split()) |
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471 for f, (m, args, msg) in actions.iteritems(): |
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472 if m not in typeactions: |
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473 typeactions[m] = [] |
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474 typeactions[m].append((f, args, msg)) |
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475 |
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476 mergemod.applyupdates(repo, typeactions, repo[None], repo['.'], False) |
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477 |
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478 # Fix dirstate |
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479 for file in added: |
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480 dirstate.normal(file) |
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481 |
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482 for file in dropped: |
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483 dirstate.drop(file) |
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484 |
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485 for file in lookup: |
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486 # File exists on disk, and we're bringing it back in an unknown state. |
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487 dirstate.normallookup(file) |
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488 |
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489 return added, dropped, lookup |
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490 |
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491 def aftercommit(repo, node): |
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492 """Perform actions after a working directory commit.""" |
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493 # This function is called unconditionally, even if sparse isn't |
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494 # enabled. |
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495 ctx = repo[node] |
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496 |
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497 profiles = patternsforrev(repo, ctx.rev())[2] |
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498 |
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499 # profiles will only have data if sparse is enabled. |
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500 if set(profiles) & set(ctx.files()): |
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501 origstatus = repo.status() |
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502 origsparsematch = matcher(repo) |
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503 refreshwdir(repo, origstatus, origsparsematch, force=True) |
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504 |
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505 prunetemporaryincludes(repo) |
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506 |
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507 def clearrules(repo, force=False): |
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508 """Clears include/exclude rules from the sparse config. |
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509 |
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510 The remaining sparse config only has profiles, if defined. The working |
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511 directory is refreshed, as needed. |
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512 """ |
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513 with repo.wlock(): |
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514 raw = repo.vfs.tryread('sparse') |
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515 includes, excludes, profiles = parseconfig(repo.ui, raw) |
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516 |
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517 if not includes and not excludes: |
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518 return |
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519 |
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520 oldstatus = repo.status() |
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521 oldmatch = matcher(repo) |
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522 writeconfig(repo, set(), set(), profiles) |
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523 refreshwdir(repo, oldstatus, oldmatch, force=force) |
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524 |
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525 def importfromfiles(repo, opts, paths, force=False): |
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526 """Import sparse config rules from files. |
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527 |
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528 The updated sparse config is written out and the working directory |
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529 is refreshed, as needed. |
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530 """ |
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531 with repo.wlock(): |
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532 # read current configuration |
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533 raw = repo.vfs.tryread('sparse') |
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534 oincludes, oexcludes, oprofiles = parseconfig(repo.ui, raw) |
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535 includes, excludes, profiles = map( |
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536 set, (oincludes, oexcludes, oprofiles)) |
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537 |
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538 aincludes, aexcludes, aprofiles = activeconfig(repo) |
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539 |
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540 # Import rules on top; only take in rules that are not yet |
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541 # part of the active rules. |
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542 changed = False |
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543 for p in paths: |
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544 with util.posixfile(util.expandpath(p)) as fh: |
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545 raw = fh.read() |
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546 |
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547 iincludes, iexcludes, iprofiles = parseconfig(repo.ui, raw) |
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548 oldsize = len(includes) + len(excludes) + len(profiles) |
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549 includes.update(iincludes - aincludes) |
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550 excludes.update(iexcludes - aexcludes) |
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551 profiles.update(set(iprofiles) - aprofiles) |
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552 if len(includes) + len(excludes) + len(profiles) > oldsize: |
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553 changed = True |
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554 |
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555 profilecount = includecount = excludecount = 0 |
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556 fcounts = (0, 0, 0) |
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557 |
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558 if changed: |
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559 profilecount = len(profiles - aprofiles) |
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560 includecount = len(includes - aincludes) |
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561 excludecount = len(excludes - aexcludes) |
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562 |
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563 oldstatus = repo.status() |
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564 oldsparsematch = matcher(repo) |
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565 |
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566 # TODO remove this try..except once the matcher integrates better |
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567 # with dirstate. We currently have to write the updated config |
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568 # because that will invalidate the matcher cache and force a |
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569 # re-read. We ideally want to update the cached matcher on the |
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570 # repo instance then flush the new config to disk once wdir is |
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571 # updated. But this requires massive rework to matcher() and its |
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572 # consumers. |
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573 writeconfig(repo, includes, excludes, profiles) |
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574 |
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575 try: |
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576 fcounts = map( |
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577 len, |
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578 refreshwdir(repo, oldstatus, oldsparsematch, force=force)) |
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579 except Exception: |
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580 writeconfig(repo, oincludes, oexcludes, oprofiles) |
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581 raise |
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582 |
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583 printchanges(repo.ui, opts, profilecount, includecount, excludecount, |
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584 *fcounts) |
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585 |
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586 def printchanges(ui, opts, profilecount=0, includecount=0, excludecount=0, |
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587 added=0, dropped=0, conflicting=0): |
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588 """Print output summarizing sparse config changes.""" |
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589 with ui.formatter('sparse', opts) as fm: |
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590 fm.startitem() |
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591 fm.condwrite(ui.verbose, 'profiles_added', _('Profiles changed: %d\n'), |
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592 profilecount) |
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593 fm.condwrite(ui.verbose, 'include_rules_added', |
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594 _('Include rules changed: %d\n'), includecount) |
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595 fm.condwrite(ui.verbose, 'exclude_rules_added', |
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596 _('Exclude rules changed: %d\n'), excludecount) |
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597 |
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598 # In 'plain' verbose mode, mergemod.applyupdates already outputs what |
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599 # files are added or removed outside of the templating formatter |
9087f9997f42
sparse: move printing of sparse config changes function into core
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33354
diff
changeset
|
600 # framework. No point in repeating ourselves in that case. |
9087f9997f42
sparse: move printing of sparse config changes function into core
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33354
diff
changeset
|
601 if not fm.isplain(): |
9087f9997f42
sparse: move printing of sparse config changes function into core
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33354
diff
changeset
|
602 fm.condwrite(ui.verbose, 'files_added', _('Files added: %d\n'), |
9087f9997f42
sparse: move printing of sparse config changes function into core
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33354
diff
changeset
|
603 added) |
9087f9997f42
sparse: move printing of sparse config changes function into core
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33354
diff
changeset
|
604 fm.condwrite(ui.verbose, 'files_dropped', _('Files dropped: %d\n'), |
9087f9997f42
sparse: move printing of sparse config changes function into core
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33354
diff
changeset
|
605 dropped) |
9087f9997f42
sparse: move printing of sparse config changes function into core
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33354
diff
changeset
|
606 fm.condwrite(ui.verbose, 'files_conflicting', |
9087f9997f42
sparse: move printing of sparse config changes function into core
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33354
diff
changeset
|
607 _('Files conflicting: %d\n'), conflicting) |