author | Matt Harbison <matt_harbison@yahoo.com> |
Sun, 20 Aug 2023 02:17:38 -0400 | |
changeset 50854 | 1144c69c7f58 |
parent 48946 | 642e31cb55f0 |
child 51863 | f4733654f144 |
permissions | -rw-r--r-- |
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git: skeleton of a new extension to _directly_ operate on git repos
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from mercurial import ( |
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match as matchmod, |
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pathutil, |
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pycompat, |
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git: skeleton of a new extension to _directly_ operate on git repos
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util, |
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git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
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) |
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git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
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from mercurial.interfaces import ( |
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git: skeleton of a new extension to _directly_ operate on git repos
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repository, |
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util as interfaceutil, |
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git: skeleton of a new extension to _directly_ operate on git repos
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) |
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git: skeleton of a new extension to _directly_ operate on git repos
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from . import gitutil |
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git: skeleton of a new extension to _directly_ operate on git repos
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git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
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git: don't fail import when pygit2 is not install
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pygit2 = gitutil.get_pygit2() |
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@interfaceutil.implementer(repository.imanifestdict) |
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class gittreemanifest: |
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"""Expose git trees (and optionally a builder's overlay) as a manifestdict. |
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Very similar to mercurial.manifest.treemanifest. |
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""" |
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Augie Fackler <augie@google.com>
parents:
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|
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git: skeleton of a new extension to _directly_ operate on git repos
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def __init__(self, git_repo, root_tree, pending_changes): |
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"""Initializer. |
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|
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git: skeleton of a new extension to _directly_ operate on git repos
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Args: |
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git_repo: The git_repo we're walking (required to look up child |
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trees). |
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root_tree: The root Git tree object for this manifest. |
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pending_changes: A dict in which pending changes will be |
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tracked. The enclosing memgittreemanifestctx will use this to |
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construct any required Tree objects in Git during it's |
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`write()` method. |
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""" |
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self._git_repo = git_repo |
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self._tree = root_tree |
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if pending_changes is None: |
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pending_changes = {} |
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# dict of path: Optional[Tuple(node, flags)] |
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self._pending_changes = pending_changes |
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|
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def _resolve_entry(self, path): |
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"""Given a path, load its node and flags, or raise KeyError if missing. |
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This takes into account any pending writes in the builder. |
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""" |
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upath = pycompat.fsdecode(path) |
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ent = None |
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if path in self._pending_changes: |
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val = self._pending_changes[path] |
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if val is None: |
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raise KeyError |
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return val |
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t = self._tree |
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comps = upath.split('/') |
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te = self._tree |
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for comp in comps[:-1]: |
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te = te[comp] |
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t = self._git_repo[te.id] |
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ent = t[comps[-1]] |
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if ent.filemode == pygit2.GIT_FILEMODE_BLOB: |
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flags = b'' |
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elif ent.filemode == pygit2.GIT_FILEMODE_BLOB_EXECUTABLE: |
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flags = b'x' |
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elif ent.filemode == pygit2.GIT_FILEMODE_LINK: |
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flags = b'l' |
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else: |
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raise ValueError('unsupported mode %s' % oct(ent.filemode)) |
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return ent.id.raw, flags |
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def __getitem__(self, path): |
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return self._resolve_entry(path)[0] |
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def find(self, path): |
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return self._resolve_entry(path) |
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def __len__(self): |
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return len(list(self.walk(matchmod.always()))) |
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def __nonzero__(self): |
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try: |
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next(iter(self)) |
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return True |
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except StopIteration: |
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return False |
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__bool__ = __nonzero__ |
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def __contains__(self, path): |
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try: |
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self._resolve_entry(path) |
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return True |
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except KeyError: |
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return False |
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def iterkeys(self): |
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return self.walk(matchmod.always()) |
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def keys(self): |
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return list(self.iterkeys()) |
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def __iter__(self): |
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return self.iterkeys() |
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def __setitem__(self, path, node): |
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self._pending_changes[path] = node, self.flags(path) |
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def __delitem__(self, path): |
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# TODO: should probably KeyError for already-deleted files? |
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self._pending_changes[path] = None |
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|
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def filesnotin(self, other, match=None): |
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if match is not None: |
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match = matchmod.badmatch(match, lambda path, msg: None) |
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sm2 = set(other.walk(match)) |
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return {f for f in self.walk(match) if f not in sm2} |
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return {f for f in self if f not in other} |
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|
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@util.propertycache |
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def _dirs(self): |
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return pathutil.dirs(self) |
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123 |
|
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def hasdir(self, dir): |
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return dir in self._dirs |
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126 |
|
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def diff(self, other, match=lambda x: True, clean=False): |
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"""Finds changes between the current manifest and m2. |
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|
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The result is returned as a dict with filename as key and |
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values of the form ((n1,fl1),(n2,fl2)), where n1/n2 is the |
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nodeid in the current/other manifest and fl1/fl2 is the flag |
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in the current/other manifest. Where the file does not exist, |
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the nodeid will be None and the flags will be the empty |
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string. |
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""" |
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result = {} |
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def _iterativediff(t1, t2, subdir): |
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"""compares two trees and appends new tree nodes to examine to |
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the stack""" |
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if t1 is None: |
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t1 = {} |
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if t2 is None: |
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t2 = {} |
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|
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for e1 in t1: |
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realname = subdir + pycompat.fsencode(e1.name) |
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|
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if e1.type == pygit2.GIT_OBJ_TREE: |
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try: |
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e2 = t2[e1.name] |
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if e2.type != pygit2.GIT_OBJ_TREE: |
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e2 = None |
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except KeyError: |
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e2 = None |
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stack.append((realname + b'/', e1, e2)) |
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159 |
else: |
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n1, fl1 = self.find(realname) |
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161 |
|
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162 |
try: |
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e2 = t2[e1.name] |
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n2, fl2 = other.find(realname) |
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165 |
except KeyError: |
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e2 = None |
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n2, fl2 = (None, b'') |
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168 |
|
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if e2 is not None and e2.type == pygit2.GIT_OBJ_TREE: |
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stack.append((realname + b'/', None, e2)) |
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171 |
|
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172 |
if not match(realname): |
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173 |
continue |
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174 |
|
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175 |
if n1 != n2 or fl1 != fl2: |
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result[realname] = ((n1, fl1), (n2, fl2)) |
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177 |
elif clean: |
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result[realname] = None |
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179 |
|
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180 |
for e2 in t2: |
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181 |
if e2.name in t1: |
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182 |
continue |
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183 |
|
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184 |
realname = subdir + pycompat.fsencode(e2.name) |
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185 |
|
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186 |
if e2.type == pygit2.GIT_OBJ_TREE: |
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187 |
stack.append((realname + b'/', None, e2)) |
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188 |
elif match(realname): |
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189 |
n2, fl2 = other.find(realname) |
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190 |
result[realname] = ((None, b''), (n2, fl2)) |
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191 |
|
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192 |
stack = [] |
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193 |
_iterativediff(self._tree, other._tree, b'') |
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194 |
while stack: |
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195 |
subdir, t1, t2 = stack.pop() |
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196 |
# stack is populated in the function call |
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197 |
_iterativediff(t1, t2, subdir) |
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198 |
|
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199 |
return result |
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200 |
|
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201 |
def setflag(self, path, flag): |
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202 |
node, unused_flag = self._resolve_entry(path) |
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203 |
self._pending_changes[path] = node, flag |
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204 |
|
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205 |
def get(self, path, default=None): |
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206 |
try: |
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207 |
return self._resolve_entry(path)[0] |
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208 |
except KeyError: |
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209 |
return default |
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210 |
|
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211 |
def flags(self, path): |
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212 |
try: |
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213 |
return self._resolve_entry(path)[1] |
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214 |
except KeyError: |
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215 |
return b'' |
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216 |
|
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217 |
def copy(self): |
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return gittreemanifest( |
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self._git_repo, self._tree, dict(self._pending_changes) |
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220 |
) |
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221 |
|
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222 |
def items(self): |
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223 |
for f in self: |
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224 |
# TODO: build a proper iterator version of this |
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225 |
yield self[f] |
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|
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def iteritems(self): |
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return self.items() |
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|
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def iterentries(self): |
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for f in self: |
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# TODO: build a proper iterator version of this |
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yield self._resolve_entry(f) |
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234 |
|
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def text(self): |
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assert False # TODO can this method move out of the manifest iface? |
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|
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def _walkonetree(self, tree, match, subdir): |
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for te in tree: |
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# TODO: can we prune dir walks with the matcher? |
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realname = subdir + pycompat.fsencode(te.name) |
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if te.type == pygit2.GIT_OBJ_TREE: |
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for inner in self._walkonetree( |
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self._git_repo[te.id], match, realname + b'/' |
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): |
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yield inner |
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elif match(realname): |
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yield pycompat.fsencode(realname) |
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|
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def walk(self, match): |
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# TODO: this is a very lazy way to merge in the pending |
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# changes. There is absolutely room for optimization here by |
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# being clever about walking over the sets... |
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baseline = set(self._walkonetree(self._tree, match, b'')) |
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deleted = {p for p, v in self._pending_changes.items() if v is None} |
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pend = {p for p in self._pending_changes if match(p)} |
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return iter(sorted((baseline | pend) - deleted)) |
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258 |
|
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259 |
|
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@interfaceutil.implementer(repository.imanifestrevisionstored) |
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class gittreemanifestctx: |
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def __init__(self, repo, gittree): |
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self._repo = repo |
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self._tree = gittree |
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265 |
|
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def read(self): |
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return gittreemanifest(self._repo, self._tree, None) |
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268 |
|
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def readfast(self, shallow=False): |
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return self.read() |
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271 |
|
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def copy(self): |
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# NB: it's important that we return a memgittreemanifestctx |
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274 |
# because the caller expects a mutable manifest. |
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return memgittreemanifestctx(self._repo, self._tree) |
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276 |
|
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def find(self, path): |
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return self.read()[path] |
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279 |
|
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280 |
|
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@interfaceutil.implementer(repository.imanifestrevisionwritable) |
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282 |
class memgittreemanifestctx: |
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283 |
def __init__(self, repo, tree): |
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self._repo = repo |
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285 |
self._tree = tree |
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286 |
# dict of path: Optional[Tuple(node, flags)] |
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287 |
self._pending_changes = {} |
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288 |
|
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289 |
def read(self): |
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return gittreemanifest(self._repo, self._tree, self._pending_changes) |
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291 |
|
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292 |
def copy(self): |
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293 |
# TODO: if we have a builder in play, what should happen here? |
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294 |
# Maybe we can shuffle copy() into the immutable interface. |
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295 |
return memgittreemanifestctx(self._repo, self._tree) |
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296 |
|
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297 |
def write(self, transaction, link, p1, p2, added, removed, match=None): |
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298 |
# We're not (for now, anyway) going to audit filenames, so we |
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299 |
# can ignore added and removed. |
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300 |
|
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301 |
# TODO what does this match argument get used for? hopefully |
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302 |
# just narrow? |
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303 |
assert not match or isinstance(match, matchmod.alwaysmatcher) |
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304 |
|
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305 |
touched_dirs = pathutil.dirs(list(self._pending_changes)) |
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trees = { |
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307 |
b'': self._tree, |
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308 |
} |
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309 |
# path: treebuilder |
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310 |
builders = { |
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b'': self._repo.TreeBuilder(self._tree), |
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312 |
} |
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313 |
# get a TreeBuilder for every tree in the touched_dirs set |
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314 |
for d in sorted(touched_dirs, key=lambda x: (len(x), x)): |
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315 |
if d == b'': |
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316 |
# loaded root tree above |
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317 |
continue |
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318 |
comps = d.split(b'/') |
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319 |
full = b'' |
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320 |
for part in comps: |
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321 |
parent = trees[full] |
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322 |
try: |
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323 |
parent_tree_id = parent[pycompat.fsdecode(part)].id |
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324 |
new = self._repo[parent_tree_id] |
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325 |
except KeyError: |
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326 |
# new directory |
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327 |
new = None |
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328 |
full += b'/' + part |
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329 |
if new is not None: |
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330 |
# existing directory |
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331 |
trees[full] = new |
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332 |
builders[full] = self._repo.TreeBuilder(new) |
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333 |
else: |
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334 |
# new directory, use an empty dict to easily |
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335 |
# generate KeyError as any nested new dirs get |
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336 |
# created. |
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337 |
trees[full] = {} |
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338 |
builders[full] = self._repo.TreeBuilder() |
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339 |
for f, info in self._pending_changes.items(): |
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if b'/' not in f: |
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341 |
dirname = b'' |
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342 |
basename = f |
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343 |
else: |
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344 |
dirname, basename = f.rsplit(b'/', 1) |
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dirname = b'/' + dirname |
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if info is None: |
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parents:
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builders[dirname].remove(pycompat.fsdecode(basename)) |
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348 |
else: |
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parents:
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n, fl = info |
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parents:
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mode = { |
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parents:
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b'': pygit2.GIT_FILEMODE_BLOB, |
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b'x': pygit2.GIT_FILEMODE_BLOB_EXECUTABLE, |
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parents:
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353 |
b'l': pygit2.GIT_FILEMODE_LINK, |
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git: skeleton of a new extension to _directly_ operate on git repos
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parents:
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354 |
}[fl] |
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git: skeleton of a new extension to _directly_ operate on git repos
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parents:
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builders[dirname].insert( |
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parents:
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356 |
pycompat.fsdecode(basename), gitutil.togitnode(n), mode |
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git: skeleton of a new extension to _directly_ operate on git repos
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parents:
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357 |
) |
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parents:
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358 |
# This visits the buffered TreeBuilders in deepest-first |
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parents:
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359 |
# order, bubbling up the edits. |
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git: skeleton of a new extension to _directly_ operate on git repos
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parents:
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for b in sorted(builders, key=len, reverse=True): |
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parents:
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361 |
if b == b'': |
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parents:
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362 |
break |
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Augie Fackler <augie@google.com>
parents:
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363 |
cb = builders[b] |
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git: skeleton of a new extension to _directly_ operate on git repos
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parents:
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dn, bn = b.rsplit(b'/', 1) |
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git: skeleton of a new extension to _directly_ operate on git repos
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parents:
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365 |
builders[dn].insert( |
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git: skeleton of a new extension to _directly_ operate on git repos
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parents:
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366 |
pycompat.fsdecode(bn), cb.write(), pygit2.GIT_FILEMODE_TREE |
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parents:
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|
367 |
) |
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return builders[b''].write().raw |