Mercurial > hg
annotate hgext/git/manifest.py @ 44874:4c53c12b92d5
setup: require a Python version with modern SSL features
This increases the minimum security baseline of Mercurial and enables us to
remove compatibility code for supporting older, less secure Python versions.
author | Manuel Jacob <me@manueljacob.de> |
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date | Fri, 29 May 2020 21:07:26 +0200 |
parents | 288328c6711b |
children | 935c9f347bdb |
rev | line source |
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1 from __future__ import absolute_import |
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2 |
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3 from mercurial import ( |
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4 match as matchmod, |
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5 pathutil, |
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6 pycompat, |
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7 util, |
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8 ) |
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9 from mercurial.interfaces import ( |
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10 repository, |
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11 util as interfaceutil, |
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12 ) |
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13 from . import gitutil |
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14 |
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15 |
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16 pygit2 = gitutil.get_pygit2() |
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17 |
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18 |
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19 @interfaceutil.implementer(repository.imanifestdict) |
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20 class gittreemanifest(object): |
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21 """Expose git trees (and optionally a builder's overlay) as a manifestdict. |
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22 |
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23 Very similar to mercurial.manifest.treemanifest. |
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24 """ |
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25 |
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26 def __init__(self, git_repo, root_tree, pending_changes): |
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27 """Initializer. |
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28 |
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29 Args: |
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30 git_repo: The git_repo we're walking (required to look up child |
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31 trees). |
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32 root_tree: The root Git tree object for this manifest. |
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33 pending_changes: A dict in which pending changes will be |
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34 tracked. The enclosing memgittreemanifestctx will use this to |
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35 construct any required Tree objects in Git during it's |
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36 `write()` method. |
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37 """ |
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38 self._git_repo = git_repo |
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39 self._tree = root_tree |
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40 if pending_changes is None: |
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41 pending_changes = {} |
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42 # dict of path: Optional[Tuple(node, flags)] |
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43 self._pending_changes = pending_changes |
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44 |
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45 def _resolve_entry(self, path): |
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46 """Given a path, load its node and flags, or raise KeyError if missing. |
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47 |
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48 This takes into account any pending writes in the builder. |
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49 """ |
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50 upath = pycompat.fsdecode(path) |
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51 ent = None |
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52 if path in self._pending_changes: |
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53 val = self._pending_changes[path] |
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54 if val is None: |
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55 raise KeyError |
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56 return val |
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57 t = self._tree |
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58 comps = upath.split('/') |
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59 for comp in comps[:-1]: |
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60 te = self._tree[comp] |
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61 t = self._git_repo[te.id] |
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62 ent = t[comps[-1]] |
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63 if ent.filemode == pygit2.GIT_FILEMODE_BLOB: |
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64 flags = b'' |
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65 elif ent.filemode == pygit2.GIT_FILEMODE_BLOB_EXECUTABLE: |
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66 flags = b'x' |
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67 elif ent.filemode == pygit2.GIT_FILEMODE_LINK: |
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68 flags = b'l' |
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69 else: |
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70 raise ValueError('unsupported mode %s' % oct(ent.filemode)) |
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71 return ent.id.raw, flags |
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72 |
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73 def __getitem__(self, path): |
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74 return self._resolve_entry(path)[0] |
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75 |
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76 def find(self, path): |
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77 return self._resolve_entry(path) |
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78 |
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79 def __len__(self): |
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80 return len(list(self.walk(matchmod.always()))) |
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81 |
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82 def __nonzero__(self): |
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83 try: |
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84 next(iter(self)) |
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85 return True |
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86 except StopIteration: |
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87 return False |
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88 |
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89 __bool__ = __nonzero__ |
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90 |
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91 def __contains__(self, path): |
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92 try: |
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93 self._resolve_entry(path) |
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94 return True |
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95 except KeyError: |
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96 return False |
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97 |
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98 def iterkeys(self): |
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99 return self.walk(matchmod.always()) |
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100 |
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101 def keys(self): |
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102 return list(self.iterkeys()) |
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103 |
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104 def __iter__(self): |
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105 return self.iterkeys() |
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106 |
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107 def __setitem__(self, path, node): |
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108 self._pending_changes[path] = node, self.flags(path) |
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109 |
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110 def __delitem__(self, path): |
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111 # TODO: should probably KeyError for already-deleted files? |
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112 self._pending_changes[path] = None |
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113 |
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114 def filesnotin(self, other, match=None): |
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115 if match is not None: |
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116 match = matchmod.badmatch(match, lambda path, msg: None) |
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117 sm2 = set(other.walk(match)) |
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118 return {f for f in self.walk(match) if f not in sm2} |
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119 return {f for f in self if f not in other} |
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120 |
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121 @util.propertycache |
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122 def _dirs(self): |
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123 return pathutil.dirs(self) |
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124 |
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125 def hasdir(self, dir): |
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126 return dir in self._dirs |
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127 |
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128 def diff(self, other, match=None, clean=False): |
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129 # TODO |
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130 assert False |
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131 |
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132 def setflag(self, path, flag): |
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133 node, unused_flag = self._resolve_entry(path) |
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134 self._pending_changes[path] = node, flag |
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135 |
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136 def get(self, path, default=None): |
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137 try: |
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138 return self._resolve_entry(path)[0] |
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139 except KeyError: |
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140 return default |
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141 |
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142 def flags(self, path): |
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143 try: |
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144 return self._resolve_entry(path)[1] |
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145 except KeyError: |
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146 return b'' |
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147 |
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148 def copy(self): |
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149 pass |
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150 |
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151 def items(self): |
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152 for f in self: |
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153 # TODO: build a proper iterator version of this |
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154 yield self[f] |
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155 |
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156 def iteritems(self): |
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157 return self.items() |
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158 |
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159 def iterentries(self): |
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160 for f in self: |
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161 # TODO: build a proper iterator version of this |
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162 yield self._resolve_entry(f) |
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163 |
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164 def text(self): |
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165 assert False # TODO can this method move out of the manifest iface? |
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166 |
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167 def _walkonetree(self, tree, match, subdir): |
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168 for te in tree: |
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169 # TODO: can we prune dir walks with the matcher? |
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170 realname = subdir + pycompat.fsencode(te.name) |
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171 if te.type == r'tree': |
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172 for inner in self._walkonetree( |
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173 self._git_repo[te.id], match, realname + b'/' |
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174 ): |
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175 yield inner |
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176 if not match(realname): |
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177 continue |
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178 yield pycompat.fsencode(realname) |
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179 |
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180 def walk(self, match): |
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181 # TODO: this is a very lazy way to merge in the pending |
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182 # changes. There is absolutely room for optimization here by |
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183 # being clever about walking over the sets... |
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184 baseline = set(self._walkonetree(self._tree, match, b'')) |
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185 deleted = {p for p, v in self._pending_changes.items() if v is None} |
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186 pend = {p for p in self._pending_changes if match(p)} |
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187 return iter(sorted((baseline | pend) - deleted)) |
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188 |
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189 |
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190 @interfaceutil.implementer(repository.imanifestrevisionstored) |
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191 class gittreemanifestctx(object): |
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192 def __init__(self, repo, gittree): |
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193 self._repo = repo |
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194 self._tree = gittree |
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195 |
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196 def read(self): |
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197 return gittreemanifest(self._repo, self._tree, None) |
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198 |
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199 def readfast(self, shallow=False): |
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200 return self.read() |
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201 |
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202 def copy(self): |
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203 # NB: it's important that we return a memgittreemanifestctx |
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204 # because the caller expects a mutable manifest. |
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205 return memgittreemanifestctx(self._repo, self._tree) |
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206 |
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207 def find(self, path): |
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208 return self.read()[path] |
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209 |
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210 |
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211 @interfaceutil.implementer(repository.imanifestrevisionwritable) |
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212 class memgittreemanifestctx(object): |
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213 def __init__(self, repo, tree): |
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214 self._repo = repo |
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215 self._tree = tree |
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216 # dict of path: Optional[Tuple(node, flags)] |
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217 self._pending_changes = {} |
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218 |
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219 def read(self): |
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220 return gittreemanifest(self._repo, self._tree, self._pending_changes) |
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221 |
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222 def copy(self): |
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223 # TODO: if we have a builder in play, what should happen here? |
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224 # Maybe we can shuffle copy() into the immutable interface. |
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225 return memgittreemanifestctx(self._repo, self._tree) |
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226 |
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227 def write(self, transaction, link, p1, p2, added, removed, match=None): |
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228 # We're not (for now, anyway) going to audit filenames, so we |
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229 # can ignore added and removed. |
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230 |
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231 # TODO what does this match argument get used for? hopefully |
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232 # just narrow? |
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233 assert not match or isinstance(match, matchmod.alwaysmatcher) |
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234 |
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235 touched_dirs = pathutil.dirs(list(self._pending_changes)) |
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236 trees = { |
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237 b'': self._tree, |
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238 } |
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239 # path: treebuilder |
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240 builders = { |
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241 b'': self._repo.TreeBuilder(self._tree), |
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242 } |
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243 # get a TreeBuilder for every tree in the touched_dirs set |
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244 for d in sorted(touched_dirs, key=lambda x: (len(x), x)): |
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245 if d == b'': |
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246 # loaded root tree above |
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247 continue |
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248 comps = d.split(b'/') |
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249 full = b'' |
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250 for part in comps: |
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251 parent = trees[full] |
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252 try: |
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253 new = self._repo[parent[pycompat.fsdecode(part)]] |
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254 except KeyError: |
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255 # new directory |
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256 new = None |
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257 full += b'/' + part |
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258 if new is not None: |
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259 # existing directory |
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260 trees[full] = new |
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261 builders[full] = self._repo.TreeBuilder(new) |
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262 else: |
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263 # new directory, use an empty dict to easily |
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264 # generate KeyError as any nested new dirs get |
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265 # created. |
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266 trees[full] = {} |
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267 builders[full] = self._repo.TreeBuilder() |
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268 for f, info in self._pending_changes.items(): |
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269 if b'/' not in f: |
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270 dirname = b'' |
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271 basename = f |
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272 else: |
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273 dirname, basename = f.rsplit(b'/', 1) |
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274 dirname = b'/' + dirname |
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275 if info is None: |
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276 builders[dirname].remove(pycompat.fsdecode(basename)) |
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277 else: |
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278 n, fl = info |
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279 mode = { |
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280 b'': pygit2.GIT_FILEMODE_BLOB, |
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281 b'x': pygit2.GIT_FILEMODE_BLOB_EXECUTABLE, |
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282 b'l': pygit2.GIT_FILEMODE_LINK, |
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283 }[fl] |
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284 builders[dirname].insert( |
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285 pycompat.fsdecode(basename), gitutil.togitnode(n), mode |
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286 ) |
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287 # This visits the buffered TreeBuilders in deepest-first |
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288 # order, bubbling up the edits. |
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289 for b in sorted(builders, key=len, reverse=True): |
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290 if b == b'': |
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291 break |
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292 cb = builders[b] |
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293 dn, bn = b.rsplit(b'/', 1) |
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294 builders[dn].insert( |
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295 pycompat.fsdecode(bn), cb.write(), pygit2.GIT_FILEMODE_TREE |
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296 ) |
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297 return builders[b''].write().raw |