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annotate hgext/git/manifest.py @ 52494:db6efd74cf14

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git: add missing `repository.imanifestdict` methods to `gittreemanifest` The next logical step was to explicitly subclass `repository.imanifestdict`, but pytype flagged a few missing methods, because they're marked abstract. File "/mnt/c/Users/Matt/hg/hgext/git/manifest.py", line 238, in copy: Can't instantiate gittreemanifest with abstract methods dirs, fastdelta, set [not-instantiable] File "/mnt/c/Users/Matt/hg/hgext/git/manifest.py", line 287, in read: Can't instantiate gittreemanifest with abstract methods dirs, fastdelta, set [not-instantiable] File "/mnt/c/Users/Matt/hg/hgext/git/manifest.py", line 309, in read: Can't instantiate gittreemanifest with abstract methods dirs, fastdelta, set [not-instantiable] I'm not bothering to figure out how to implement them- add them to appease pytype, and put a TODO to fill in a proper implementation later.
author Matt Harbison <matt_harbison@yahoo.com>
date Wed, 11 Dec 2024 02:02:34 -0500
parents 48cdbd4d5443
children 6412dcec52d3
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1 from __future__ import annotations
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2
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3 import typing
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4
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5 from typing import (
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6 Any,
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7 Iterable,
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8 Iterator,
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9 Set,
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10 )
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12 from mercurial import (
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13 match as matchmod,
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14 pathutil,
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15 pycompat,
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16 util,
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17 )
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18 from mercurial.interfaces import (
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19 repository,
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20 util as interfaceutil,
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21 )
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22 from . import gitutil
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23
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24 if typing.TYPE_CHECKING:
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25 from typing import (
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26 ByteString, # TODO: change to Buffer for 3.14
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27 )
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29 pygit2 = gitutil.get_pygit2()
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31
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32 @interfaceutil.implementer(repository.imanifestdict)
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33 class gittreemanifest:
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34 """Expose git trees (and optionally a builder's overlay) as a manifestdict.
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35
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36 Very similar to mercurial.manifest.treemanifest.
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37 """
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38
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39 def __init__(self, git_repo, root_tree, pending_changes):
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40 """Initializer.
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41
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42 Args:
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43 git_repo: The git_repo we're walking (required to look up child
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44 trees).
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45 root_tree: The root Git tree object for this manifest.
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46 pending_changes: A dict in which pending changes will be
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47 tracked. The enclosing memgittreemanifestctx will use this to
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48 construct any required Tree objects in Git during it's
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49 `write()` method.
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50 """
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51 self._git_repo = git_repo
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52 self._tree = root_tree
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53 if pending_changes is None:
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54 pending_changes = {}
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55 # dict of path: Optional[Tuple(node, flags)]
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56 self._pending_changes = pending_changes
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57
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58 def _resolve_entry(self, path) -> tuple[bytes, bytes]:
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59 """Given a path, load its node and flags, or raise KeyError if missing.
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60
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61 This takes into account any pending writes in the builder.
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62 """
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63 upath = pycompat.fsdecode(path)
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64 ent = None
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65 if path in self._pending_changes:
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66 val = self._pending_changes[path]
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67 if val is None:
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68 raise KeyError
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69 return val
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70 t = self._tree
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71 comps = upath.split('/')
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72 te = self._tree
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73 for comp in comps[:-1]:
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74 te = te[comp]
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75 t = self._git_repo[te.id]
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76 ent = t[comps[-1]]
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77 if ent.filemode == pygit2.GIT_FILEMODE_BLOB:
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78 flags = b''
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79 elif ent.filemode == pygit2.GIT_FILEMODE_BLOB_EXECUTABLE:
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80 flags = b'x'
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81 elif ent.filemode == pygit2.GIT_FILEMODE_LINK:
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82 flags = b'l'
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83 else:
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84 raise ValueError('unsupported mode %s' % oct(ent.filemode))
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85 return ent.id.raw, flags
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86
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87 def __getitem__(self, path: bytes) -> bytes:
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88 return self._resolve_entry(path)[0]
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89
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90 def find(self, path: bytes) -> tuple[bytes, bytes]:
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91 return self._resolve_entry(path)
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92
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93 def __len__(self) -> int:
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94 return len(list(self.walk(matchmod.always())))
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95
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96 def __nonzero__(self) -> bool:
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97 try:
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98 next(iter(self))
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99 return True
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100 except StopIteration:
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101 return False
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102
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103 __bool__ = __nonzero__
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104
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105 def __contains__(self, path: bytes) -> bool:
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106 try:
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107 self._resolve_entry(path)
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108 return True
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109 except KeyError:
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110 return False
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111
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112 def iterkeys(self) -> Iterator[bytes]:
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113 return self.walk(matchmod.always())
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114
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115 def keys(self) -> list[bytes]:
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116 return list(self.iterkeys())
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117
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118 def __iter__(self) -> Iterator[bytes]:
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119 return self.iterkeys()
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120
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121 def set(self, path: bytes, node: bytes, flags: bytes) -> None:
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122 raise NotImplementedError # TODO: implement this
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123
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124 def __setitem__(self, path: bytes, node: bytes) -> None:
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125 self._pending_changes[path] = node, self.flags(path)
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126
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127 def __delitem__(self, path: bytes) -> None:
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128 # TODO: should probably KeyError for already-deleted files?
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129 self._pending_changes[path] = None
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130
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131 def filesnotin(self, other, match=None) -> Set[bytes]:
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diff changeset
132 if match is not None:
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diff changeset
133 match = matchmod.badmatch(match, lambda path, msg: None)
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parents:
diff changeset
134 sm2 = set(other.walk(match))
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parents:
diff changeset
135 return {f for f in self.walk(match) if f not in sm2}
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diff changeset
136 return {f for f in self if f not in other}
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parents:
diff changeset
137
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diff changeset
138 @util.propertycache
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diff changeset
139 def _dirs(self):
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140 return pathutil.dirs(self)
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141
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142 def dirs(self) -> pathutil.dirs:
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143 return self._dirs # TODO: why is there a prpoertycache?
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144
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145 def hasdir(self, dir: bytes) -> bool:
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146 return dir in self._dirs
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147
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148 def diff(
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149 self,
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150 other: Any, # TODO: 'manifestdict' or (better) equivalent interface
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151 match: Any = lambda x: True, # TODO: Optional[matchmod.basematcher] = None,
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152 clean: bool = False,
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153 ) -> dict[
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154 bytes,
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155 tuple[tuple[bytes | None, bytes], tuple[bytes | None, bytes]] | None,
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156 ]:
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157 """Finds changes between the current manifest and m2.
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158
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159 The result is returned as a dict with filename as key and
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160 values of the form ((n1,fl1),(n2,fl2)), where n1/n2 is the
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161 nodeid in the current/other manifest and fl1/fl2 is the flag
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162 in the current/other manifest. Where the file does not exist,
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163 the nodeid will be None and the flags will be the empty
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164 string.
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165 """
44931
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166 result = {}
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167
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168 def _iterativediff(t1, t2, subdir):
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169 """compares two trees and appends new tree nodes to examine to
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170 the stack"""
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171 if t1 is None:
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172 t1 = {}
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173 if t2 is None:
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174 t2 = {}
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diff changeset
175
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176 for e1 in t1:
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177 realname = subdir + pycompat.fsencode(e1.name)
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178
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179 if e1.type == pygit2.GIT_OBJ_TREE:
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180 try:
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181 e2 = t2[e1.name]
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182 if e2.type != pygit2.GIT_OBJ_TREE:
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183 e2 = None
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184 except KeyError:
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185 e2 = None
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186
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187 stack.append((realname + b'/', e1, e2))
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188 else:
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189 n1, fl1 = self.find(realname)
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190
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191 try:
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192 e2 = t2[e1.name]
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193 n2, fl2 = other.find(realname)
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194 except KeyError:
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195 e2 = None
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196 n2, fl2 = (None, b'')
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197
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198 if e2 is not None and e2.type == pygit2.GIT_OBJ_TREE:
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199 stack.append((realname + b'/', None, e2))
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200
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201 if not match(realname):
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diff changeset
202 continue
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203
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204 if n1 != n2 or fl1 != fl2:
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205 result[realname] = ((n1, fl1), (n2, fl2))
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206 elif clean:
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207 result[realname] = None
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diff changeset
208
f294b4e14fd0 git: implement diff manifest method
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209 for e2 in t2:
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diff changeset
210 if e2.name in t1:
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diff changeset
211 continue
f294b4e14fd0 git: implement diff manifest method
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diff changeset
212
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diff changeset
213 realname = subdir + pycompat.fsencode(e2.name)
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diff changeset
214
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diff changeset
215 if e2.type == pygit2.GIT_OBJ_TREE:
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diff changeset
216 stack.append((realname + b'/', None, e2))
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diff changeset
217 elif match(realname):
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diff changeset
218 n2, fl2 = other.find(realname)
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diff changeset
219 result[realname] = ((None, b''), (n2, fl2))
f294b4e14fd0 git: implement diff manifest method
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diff changeset
220
f294b4e14fd0 git: implement diff manifest method
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diff changeset
221 stack = []
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diff changeset
222 _iterativediff(self._tree, other._tree, b'')
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diff changeset
223 while stack:
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diff changeset
224 subdir, t1, t2 = stack.pop()
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diff changeset
225 # stack is populated in the function call
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diff changeset
226 _iterativediff(t1, t2, subdir)
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diff changeset
227
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diff changeset
228 return result
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229
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diff changeset
230 def setflag(self, path: bytes, flag: bytes) -> None:
44477
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diff changeset
231 node, unused_flag = self._resolve_entry(path)
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parents:
diff changeset
232 self._pending_changes[path] = node, flag
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parents:
diff changeset
233
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diff changeset
234 def get(self, path: bytes, default=None) -> bytes | None:
44477
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parents:
diff changeset
235 try:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
236 return self._resolve_entry(path)[0]
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
237 except KeyError:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
238 return default
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
239
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diff changeset
240 def flags(self, path: bytes) -> bytes:
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parents:
diff changeset
241 try:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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diff changeset
242 return self._resolve_entry(path)[1]
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parents:
diff changeset
243 except KeyError:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
244 return b''
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
245
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diff changeset
246 def copy(self) -> 'gittreemanifest':
45417
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247 return gittreemanifest(
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diff changeset
248 self._git_repo, self._tree, dict(self._pending_changes)
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diff changeset
249 )
44477
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250
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diff changeset
251 def items(self) -> Iterator[tuple[bytes, bytes]]:
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diff changeset
252 for f in self:
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253 # TODO: build a proper iterator version of this
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diff changeset
254 yield f, self[f]
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diff changeset
255
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diff changeset
256 def iteritems(self) -> Iterator[tuple[bytes, bytes]]:
44477
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parents:
diff changeset
257 return self.items()
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parents:
diff changeset
258
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diff changeset
259 def iterentries(self) -> Iterator[tuple[bytes, bytes, bytes]]:
44477
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parents:
diff changeset
260 for f in self:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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diff changeset
261 # TODO: build a proper iterator version of this
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262 yield f, *self._resolve_entry(f)
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263
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diff changeset
264 def text(self) -> ByteString:
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265 # TODO can this method move out of the manifest iface?
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266 raise NotImplementedError
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267
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diff changeset
268 def fastdelta(
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269 self, base: ByteString, changes: Iterable[tuple[bytes, bool]]
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270 ) -> tuple[ByteString, ByteString]:
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271 raise NotImplementedError # TODO: implement this
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272
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273 def _walkonetree(self, tree, match, subdir):
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274 for te in tree:
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275 # TODO: can we prune dir walks with the matcher?
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276 realname = subdir + pycompat.fsencode(te.name)
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277 if te.type == pygit2.GIT_OBJ_TREE:
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278 for inner in self._walkonetree(
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279 self._git_repo[te.id], match, realname + b'/'
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280 ):
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281 yield inner
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282 elif match(realname):
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283 yield pycompat.fsencode(realname)
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284
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285 def walk(self, match: matchmod.basematcher) -> Iterator[bytes]:
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286 # TODO: this is a very lazy way to merge in the pending
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287 # changes. There is absolutely room for optimization here by
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288 # being clever about walking over the sets...
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289 baseline = set(self._walkonetree(self._tree, match, b''))
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290 deleted = {p for p, v in self._pending_changes.items() if v is None}
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291 pend = {p for p in self._pending_changes if match(p)}
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292 return iter(sorted((baseline | pend) - deleted))
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293
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294
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295 class gittreemanifestctx(repository.imanifestrevisionstored):
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296 def __init__(self, repo, gittree):
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297 self._repo = repo
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298 self._tree = gittree
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299
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300 def read(self):
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301 return gittreemanifest(self._repo, self._tree, None)
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302
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303 def readfast(self, shallow: bool = False):
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304 return self.read()
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305
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306 def copy(self):
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307 # NB: it's important that we return a memgittreemanifestctx
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308 # because the caller expects a mutable manifest.
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309 return memgittreemanifestctx(self._repo, self._tree)
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310
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311 def find(self, path: bytes) -> tuple[bytes, bytes]:
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312 return self.read().find(path)
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313
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314
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diff changeset
315 class memgittreemanifestctx(repository.imanifestrevisionwritable):
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316 def __init__(self, repo, tree):
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317 self._repo = repo
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318 self._tree = tree
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319 # dict of path: Optional[Tuple(node, flags)]
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320 self._pending_changes = {}
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321
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322 def read(self):
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323 return gittreemanifest(self._repo, self._tree, self._pending_changes)
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diff changeset
324
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diff changeset
325 def copy(self):
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diff changeset
326 # TODO: if we have a builder in play, what should happen here?
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327 # Maybe we can shuffle copy() into the immutable interface.
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328 return memgittreemanifestctx(self._repo, self._tree)
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diff changeset
329
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330 def write(self, transaction, link, p1, p2, added, removed, match=None):
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331 # We're not (for now, anyway) going to audit filenames, so we
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diff changeset
332 # can ignore added and removed.
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diff changeset
333
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diff changeset
334 # TODO what does this match argument get used for? hopefully
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diff changeset
335 # just narrow?
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diff changeset
336 assert not match or isinstance(match, matchmod.alwaysmatcher)
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parents:
diff changeset
337
44625
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diff changeset
338 touched_dirs = pathutil.dirs(list(self._pending_changes))
44477
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diff changeset
339 trees = {
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diff changeset
340 b'': self._tree,
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diff changeset
341 }
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parents:
diff changeset
342 # path: treebuilder
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diff changeset
343 builders = {
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diff changeset
344 b'': self._repo.TreeBuilder(self._tree),
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diff changeset
345 }
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parents:
diff changeset
346 # get a TreeBuilder for every tree in the touched_dirs set
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diff changeset
347 for d in sorted(touched_dirs, key=lambda x: (len(x), x)):
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parents:
diff changeset
348 if d == b'':
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parents:
diff changeset
349 # loaded root tree above
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
350 continue
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parents:
diff changeset
351 comps = d.split(b'/')
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
352 full = b''
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parents:
diff changeset
353 for part in comps:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
354 parent = trees[full]
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parents:
diff changeset
355 try:
45516
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Connor Sheehan <sheehan@mozilla.com>
parents: 45417
diff changeset
356 parent_tree_id = parent[pycompat.fsdecode(part)].id
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parents: 45417
diff changeset
357 new = self._repo[parent_tree_id]
44477
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diff changeset
358 except KeyError:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
359 # new directory
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
360 new = None
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parents:
diff changeset
361 full += b'/' + part
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parents:
diff changeset
362 if new is not None:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
363 # existing directory
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
364 trees[full] = new
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parents:
diff changeset
365 builders[full] = self._repo.TreeBuilder(new)
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parents:
diff changeset
366 else:
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parents:
diff changeset
367 # new directory, use an empty dict to easily
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parents:
diff changeset
368 # generate KeyError as any nested new dirs get
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parents:
diff changeset
369 # created.
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diff changeset
370 trees[full] = {}
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diff changeset
371 builders[full] = self._repo.TreeBuilder()
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parents:
diff changeset
372 for f, info in self._pending_changes.items():
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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diff changeset
373 if b'/' not in f:
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diff changeset
374 dirname = b''
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diff changeset
375 basename = f
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
376 else:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
377 dirname, basename = f.rsplit(b'/', 1)
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parents:
diff changeset
378 dirname = b'/' + dirname
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diff changeset
379 if info is None:
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diff changeset
380 builders[dirname].remove(pycompat.fsdecode(basename))
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parents:
diff changeset
381 else:
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parents:
diff changeset
382 n, fl = info
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parents:
diff changeset
383 mode = {
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parents:
diff changeset
384 b'': pygit2.GIT_FILEMODE_BLOB,
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parents:
diff changeset
385 b'x': pygit2.GIT_FILEMODE_BLOB_EXECUTABLE,
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parents:
diff changeset
386 b'l': pygit2.GIT_FILEMODE_LINK,
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parents:
diff changeset
387 }[fl]
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parents:
diff changeset
388 builders[dirname].insert(
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
389 pycompat.fsdecode(basename), gitutil.togitnode(n), mode
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
390 )
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
391 # This visits the buffered TreeBuilders in deepest-first
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parents:
diff changeset
392 # order, bubbling up the edits.
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parents:
diff changeset
393 for b in sorted(builders, key=len, reverse=True):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
394 if b == b'':
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
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395 break
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
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396 cb = builders[b]
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
397 dn, bn = b.rsplit(b'/', 1)
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
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398 builders[dn].insert(
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
399 pycompat.fsdecode(bn), cb.write(), pygit2.GIT_FILEMODE_TREE
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
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400 )
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
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401 return builders[b''].write().raw