mirror of
https://github.com/facebook/sapling.git
synced 2024-10-07 07:17:55 +03:00
44343769f8
Summary: We want to rename away from "mercurial". Rather than rename the "mercurial" Python package, we opted to just collapse it into the parent "edenscm" package. This is also a step towards further organizing we want to do around the new project name. To ease the transition wrt hotfixes, we now replace "edenscm.mercurial" with "mercurial" to fix imports within base64-python extensions. Reviewed By: sggutier Differential Revision: D38943169 fbshipit-source-id: 03fa18079c51e2f7fac05d65b127095da3ab7c99
687 lines
23 KiB
Python
687 lines
23 KiB
Python
# Portions Copyright (c) Meta Platforms, Inc. and affiliates.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2.
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# bundlerepo.py - repository class for viewing uncompressed bundles
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#
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# Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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"""Repository class for viewing uncompressed bundles.
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This provides a read-only repository interface to bundles as if they
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were part of the actual repository.
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"""
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from __future__ import absolute_import
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import os
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import shutil
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import tempfile
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from typing import IO, Optional, Union
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from . import (
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bundle2,
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changegroup,
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changelog2,
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cmdutil,
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discovery,
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error,
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exchange,
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filelog,
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localrepo,
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manifest,
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mdiff,
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mutation,
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pathutil,
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phases,
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pycompat,
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revlog,
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util,
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vfs as vfsmod,
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visibility,
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)
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from .i18n import _
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from .node import nullid
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from .pycompat import isint
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class bundlerevlog(revlog.revlog):
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def __init__(self, opener, indexfile, cgunpacker, linkmapper):
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# How it works:
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# To retrieve a revision, we need to know the offset of the revision in
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# the bundle (an unbundle object). We store this offset in the index
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# (start). The base of the delta is stored in the base field.
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#
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# To differentiate a rev in the bundle from a rev in the revlog, we
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# check revision against repotiprev.
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opener = vfsmod.readonlyvfs(opener)
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# bundlechangelog might have called revlog.revlog.__init__ already.
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# avoid re-init the revlog.
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if not util.safehasattr(self, "opener"):
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index2 = indexfile.startswith("00changelog")
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revlog.revlog.__init__(self, opener, indexfile, index2=index2)
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inner = getattr(self, "inner", None)
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index2 = getattr(self, "index2", None)
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self.bundle = cgunpacker
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n = len(self)
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self.repotiprev = n - 1
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self.bundlerevs = set() # used by 'bundle()' revset expression
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self.bundleheads = set() # used by visibility
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for deltadata in cgunpacker.deltaiter():
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node, p1, p2, cs, deltabase, delta, flags = deltadata
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size = len(delta)
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start = cgunpacker.tell() - size
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link = linkmapper(cs)
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if node in self.nodemap:
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# this can happen if two branches make the same change
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self.bundlerevs.add(self.nodemap[node])
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continue
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for p in (p1, p2):
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if p not in self.nodemap:
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raise error.LookupError(p, self.indexfile, _("unknown parent"))
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if deltabase not in self.nodemap:
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raise LookupError(deltabase, self.indexfile, _("unknown delta base"))
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baserev = self.rev(deltabase)
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p1rev = self.rev(p1)
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p2rev = self.rev(p2)
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# start, size, full unc. size, base (unused), link, p1, p2, node
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e = (
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revlog.offset_type(start, flags),
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size,
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-1,
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baserev,
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link,
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p1rev,
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p2rev,
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node,
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)
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if self.index is not None:
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self.index.insert(-1, e)
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if index2 is not None:
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index2.insert(node, [p for p in (p1rev, p2rev) if p >= 0])
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if inner is not None:
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parentnodes = [p for p in (p1, p2) if p != nullid]
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basetext = self.revision(deltabase)
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text = mdiff.patches(basetext, [delta])
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inner.addcommits([(node, parentnodes, bytes(text))])
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self.nodemap[node] = n
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self.bundlerevs.add(n)
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self.bundleheads.add(n)
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self.bundleheads.discard(p1rev)
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self.bundleheads.discard(p2rev)
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n += 1
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def _chunk(self, rev, df=None):
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# Warning: in case of bundle, the diff is against what we stored as
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# delta base, not against rev - 1
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# XXX: could use some caching
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if rev <= self.repotiprev:
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return revlog.revlog._chunk(self, rev)
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self.bundle.seek(self.start(rev))
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return self.bundle.read(self.length(rev))
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def revdiff(self, rev1, rev2):
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"""return or calculate a delta between two revisions"""
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if rev1 > self.repotiprev and rev2 > self.repotiprev:
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# hot path for bundle
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revb = self.index[rev2][3]
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if revb == rev1:
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return self._chunk(rev2)
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elif rev1 <= self.repotiprev and rev2 <= self.repotiprev:
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return revlog.revlog.revdiff(self, rev1, rev2)
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return mdiff.textdiff(
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self.revision(rev1, raw=True), self.revision(rev2, raw=True)
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)
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def revision(
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self,
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nodeorrev: "Union[int, bytes]",
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_df: "Optional[IO]" = None,
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raw: bool = False,
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) -> bytes:
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"""return an uncompressed revision of a given node or revision
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number.
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"""
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if isint(nodeorrev):
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rev = nodeorrev
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node = self.node(rev)
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else:
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node = nodeorrev
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rev = self.rev(node)
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if node == nullid:
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return b""
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rawtext = None
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chain = []
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iterrev = rev
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cache = self._cache
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# reconstruct the revision if it is from a changegroup
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while iterrev > self.repotiprev:
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if cache is not None:
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if cache[1] == iterrev:
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rawtext = cache[2]
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break
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chain.append(iterrev)
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iterrev = self.index[iterrev][3]
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if rawtext is None:
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rawtext = self.baserevision(iterrev)
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while chain:
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delta = self._chunk(chain.pop())
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rawtext = mdiff.patches(rawtext, [delta])
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text, validatehash = self._processflags(
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rawtext, self.flags(rev), "read", raw=raw
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)
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if validatehash:
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self.checkhash(text, node, rev=rev)
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self._cache = (node, rev, rawtext)
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return text
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def baserevision(self, nodeorrev):
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# Revlog subclasses may override 'revision' method to modify format of
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# content retrieved from revlog. To use bundlerevlog with such class one
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# needs to override 'baserevision' and make more specific call here.
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return revlog.revlog.revision(self, nodeorrev, raw=True)
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def addrevision(self, *args, **kwargs):
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raise NotImplementedError
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def addgroup(self, *args, **kwargs):
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raise NotImplementedError
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def strip(self, *args, **kwargs):
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raise NotImplementedError
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def checksize(self):
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raise NotImplementedError
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class bundlechangelog2(changelog2.changelog):
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def importbundle(self, cgunpacker):
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"""import commits from a bundle"""
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nodetext = {} # {node: text}
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commits = []
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bundlenodes = []
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bundleparents = set()
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nodemap = self.nodemap
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for deltadata in cgunpacker.deltaiter():
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node, p1, p2, cs, deltabase, delta, flags = deltadata
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bundlenodes.append(node)
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bundleparents.add(p1)
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bundleparents.add(p2)
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if node in nodemap:
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# this can happen if two branches make the same change
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continue
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parentnodes = [p for p in (p1, p2) if p != nullid]
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for p in parentnodes:
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if p not in nodetext and p not in nodemap:
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raise error.LookupError(p, self.indexfile, _("unknown parent"))
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if deltabase not in nodetext and deltabase not in self.nodemap:
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raise LookupError(deltabase, self.indexfile, _("unknown delta base"))
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basetext = nodetext.get(deltabase) or self.revision(deltabase)
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text = bytes(mdiff.patches(basetext, [delta]))
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nodetext[node] = text
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commits.append((node, parentnodes, text))
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bundlenodes.append(node)
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self.inner.addcommits(commits)
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self.bundlenodes = self.dag.sort(bundlenodes)
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self.bundleheads = self.dag.heads(self.bundlenodes)
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self._visibleheads = self._loadvisibleheads(self.svfs)
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@property
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def bundlerevs(self):
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"""used by 'bundle()' revset"""
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return self.torevset(self.bundlenodes)
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def _loadvisibleheads(self, opener):
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heads = visibility.bundlevisibleheads(opener)
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heads.addbundleheads(self.bundleheads)
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return heads
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class bundlemanifest(bundlerevlog, manifest.manifestrevlog):
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def __init__(self, opener, cgunpacker, linkmapper, dirlogstarts=None, dir=""):
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manifest.manifestrevlog.__init__(self, opener, dir=dir)
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bundlerevlog.__init__(self, opener, self.indexfile, cgunpacker, linkmapper)
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if dirlogstarts is None:
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dirlogstarts = {}
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if self.bundle.version == "03":
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dirlogstarts = _getfilestarts(self.bundle)
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self._dirlogstarts = dirlogstarts
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self._linkmapper = linkmapper
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def baserevision(self, nodeorrev):
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node = nodeorrev
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if isint(node):
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node = self.node(node)
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if node in self.fulltextcache:
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result = b"%s" % self.fulltextcache[node]
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else:
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result = manifest.manifestrevlog.revision(self, nodeorrev, raw=True)
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return result
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def dirlog(self, d):
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if d in self._dirlogstarts:
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self.bundle.seek(self._dirlogstarts[d])
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return bundlemanifest(
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self.opener, self.bundle, self._linkmapper, self._dirlogstarts, dir=d
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)
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return super(bundlemanifest, self).dirlog(d)
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class bundlefilelog(bundlerevlog, filelog.filelog):
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def __init__(self, opener, path, cgunpacker, linkmapper):
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filelog.filelog.__init__(self, opener, path)
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bundlerevlog.__init__(self, opener, self.indexfile, cgunpacker, linkmapper)
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def baserevision(self, nodeorrev):
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return filelog.filelog.revision(self, nodeorrev, raw=True)
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class bundlepeer(localrepo.localpeer):
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def canpush(self) -> bool:
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return False
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class bundlephasecache(phases.phasecache):
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def __init__(self, *args, **kwargs):
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super(bundlephasecache, self).__init__(*args, **kwargs)
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if util.safehasattr(self, "opener"):
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self.opener = vfsmod.readonlyvfs(self.opener)
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def write(self):
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raise NotImplementedError
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def _write(self, fp):
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raise NotImplementedError
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def _updateroots(self, phase, newroots, tr):
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self.phaseroots[phase] = newroots
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self.invalidate()
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self.dirty = True
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def _getfilestarts(cgunpacker):
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filespos = {}
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for chunkdata in iter(cgunpacker.filelogheader, {}):
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fname = chunkdata["filename"]
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filespos[fname] = cgunpacker.tell()
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for chunk in iter(lambda: cgunpacker.deltachunk(None), {}):
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pass
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return filespos
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class bundlerepository(localrepo.localrepository):
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"""A repository instance that is a union of a local repo and a bundle.
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Instances represent a read-only repository composed of a local repository
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with the contents of a bundle file applied. The repository instance is
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conceptually similar to the state of a repository after an
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``hg unbundle`` operation. However, the contents of the bundle are never
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applied to the actual base repository.
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"""
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def __init__(self, ui, repopath, bundlepath):
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self._tempparent = None
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try:
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localrepo.localrepository.__init__(self, ui, repopath)
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except error.RepoError:
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self._tempparent = tempfile.mkdtemp()
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localrepo.instance(ui, self._tempparent, 1)
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localrepo.localrepository.__init__(self, ui, self._tempparent)
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self.ui.setconfig("phases", "publish", False, "bundlerepo")
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if repopath:
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self._url = "bundle:" + util.expandpath(repopath) + "+" + bundlepath
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else:
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self._url = "bundle:" + bundlepath
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self.tempfile = None
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f = util.posixfile(bundlepath, "rb")
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bundle = exchange.readbundle(ui, f, bundlepath)
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if isinstance(bundle, bundle2.unbundle20):
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self._bundlefile = bundle
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self._cgunpacker = None
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cgpart = None
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for part in bundle.iterparts(seekable=True):
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if part.type == "changegroup":
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if cgpart:
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raise NotImplementedError(
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"can't process " "multiple changegroups"
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)
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cgpart = part
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self._handlebundle2part(bundle, part)
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if not cgpart:
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raise error.Abort(_("No changegroups found"))
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# This is required to placate a later consumer, which expects
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# the payload offset to be at the beginning of the changegroup.
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# We need to do this after the iterparts() generator advances
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# because iterparts() will seek to end of payload after the
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# generator returns control to iterparts().
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cgpart.seek(0, os.SEEK_SET)
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elif isinstance(bundle, changegroup.cg1unpacker):
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if bundle.compressed():
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f = self._writetempbundle(bundle.read, ".hg10un", header="HG10UN")
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bundle = exchange.readbundle(ui, f, bundlepath, self.localvfs)
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self._bundlefile = bundle
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self._cgunpacker = bundle
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else:
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raise error.Abort(_("bundle type %s cannot be read") % type(bundle))
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# dict with the mapping 'filename' -> position in the changegroup.
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self._cgfilespos = {}
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if not self._phasecache._headbased:
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cl = self.changelog
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rootdraftnodes = cl.dag.roots(cl.bundlenodes)
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phases.retractboundary(
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self,
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None,
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phases.draft,
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rootdraftnodes,
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)
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def _handlebundle2part(self, bundle, part):
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if part.type != "changegroup":
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return
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cgstream = part
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version = part.params.get("version", "01")
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legalcgvers = changegroup.supportedincomingversions(self)
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if version not in legalcgvers:
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msg = _("Unsupported changegroup version: %s")
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raise error.Abort(msg % version)
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cgstream = self._writetempbundle(part.read, ".cg%sun" % version)
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self._cgunpacker = changegroup.getunbundler(version, cgstream, "UN")
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def _writetempbundle(self, readfn, suffix, header=""):
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"""Write a temporary file to disk"""
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fdtemp, temp = self.localvfs.mkstemp(prefix="hg-bundle-", suffix=suffix)
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self.tempfile = temp
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with util.fdopen(fdtemp, "wb") as fptemp:
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fptemp.write(pycompat.encodeutf8(header))
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while True:
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chunk = readfn(2**18)
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if not chunk:
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break
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fptemp.write(chunk)
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return self.localvfs.open(self.tempfile, mode="rb")
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@util.propertycache
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def _phasecache(self):
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return bundlephasecache(self, self._phasedefaults)
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@util.propertycache
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def _mutationstore(self):
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return mutation.bundlemutationstore(self)
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@util.propertycache
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def changelog(self):
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# consume the header if it exists
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self._cgunpacker.changelogheader()
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cl = localrepo._openchangelog(self)
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cl.__class__ = bundlechangelog2
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cl.importbundle(self._cgunpacker)
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self.manstart = self._cgunpacker.tell()
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return cl
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@util.propertycache
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def manifestlog(self):
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return super(bundlerepository, self).manifestlog
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def _constructmanifest(self):
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self._cgunpacker.seek(self.manstart)
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# consume the header if it exists
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self._cgunpacker.manifestheader()
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linkmapper = self.changelog.rev
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m = bundlemanifest(self.svfs, self._cgunpacker, linkmapper)
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self.filestart = self._cgunpacker.tell()
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return m
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def _consumemanifest(self):
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"""Consumes the manifest portion of the bundle, setting filestart so the
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file portion can be read."""
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self._cgunpacker.seek(self.manstart)
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self._cgunpacker.manifestheader()
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for delta in self._cgunpacker.deltaiter():
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pass
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# Changegroup v3 supports additional manifest entries that we need to
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# skip.
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if self._cgunpacker.version == "03":
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for chunkdata in iter(self._cgunpacker.filelogheader, {}):
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# If we get here, there are directory manifests in the changegroup
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for delta in self._cgunpacker.deltaiter():
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pass
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self.filestart = self._cgunpacker.tell()
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@util.propertycache
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def manstart(self):
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self.changelog
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return self.manstart
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@util.propertycache
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def filestart(self):
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self.manifestlog
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# If filestart was not set by self.manifestlog, that means the
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# manifestlog implementation did not consume the manifests from the
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# changegroup (ex: it might be consuming trees from a separate bundle2
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# part instead). So we need to manually consume it.
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if "filestart" not in self.__dict__:
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self._consumemanifest()
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return self.filestart
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|
|
def url(self) -> str:
|
|
return self._url
|
|
|
|
def file(self, f):
|
|
if not self._cgfilespos:
|
|
self._cgunpacker.seek(self.filestart)
|
|
self._cgfilespos = _getfilestarts(self._cgunpacker)
|
|
|
|
if f in self._cgfilespos:
|
|
self._cgunpacker.seek(self._cgfilespos[f])
|
|
linkmapper = self.changelog.rev
|
|
return bundlefilelog(self.svfs, f, self._cgunpacker, linkmapper)
|
|
else:
|
|
return filelog.filelog(self.svfs, f)
|
|
|
|
def close(self) -> None:
|
|
"""Close assigned bundle file immediately."""
|
|
self._bundlefile.close()
|
|
if self.tempfile is not None:
|
|
self.localvfs.unlink(self.tempfile)
|
|
path = self._tempparent
|
|
if path is not None:
|
|
shutil.rmtree(path, True)
|
|
|
|
def cancopy(self) -> bool:
|
|
return False
|
|
|
|
def peer(self) -> "localrepo.localpeer":
|
|
return bundlepeer(self)
|
|
|
|
def getcwd(self) -> str:
|
|
return pycompat.getcwd() # always outside the repo
|
|
|
|
# Check if parents exist in localrepo before setting
|
|
def setparents(self, p1: bytes, p2: bytes = nullid) -> None:
|
|
self.changelog.rev(p1)
|
|
self.changelog.rev(p2)
|
|
return super(bundlerepository, self).setparents(p1, p2)
|
|
|
|
|
|
def instance(ui, path, create):
|
|
if create:
|
|
raise error.Abort(_("cannot create new bundle repository"))
|
|
# internal config: bundle.mainreporoot
|
|
parentpath = ui.config("bundle", "mainreporoot")
|
|
if not parentpath:
|
|
# try to find the correct path to the working directory repo
|
|
parentpath = cmdutil.findrepo(pycompat.getcwd())
|
|
if parentpath is None:
|
|
parentpath = ""
|
|
if parentpath:
|
|
# Try to make the full path relative so we get a nice, short URL.
|
|
# In particular, we don't want temp dir names in test outputs.
|
|
cwd = pycompat.getcwd()
|
|
if parentpath == cwd:
|
|
parentpath = ""
|
|
else:
|
|
cwd = pathutil.normasprefix(cwd)
|
|
if parentpath.startswith(cwd):
|
|
parentpath = parentpath[len(cwd) :]
|
|
u = util.url(path)
|
|
path = u.localpath()
|
|
if u.scheme == "bundle":
|
|
s = path.split("+", 1)
|
|
if len(s) == 1:
|
|
repopath, bundlename = parentpath, s[0]
|
|
else:
|
|
repopath, bundlename = s
|
|
else:
|
|
repopath, bundlename = parentpath, path
|
|
return bundlerepository(ui, repopath, bundlename)
|
|
|
|
|
|
class bundletransactionmanager(object):
|
|
def transaction(self):
|
|
return None
|
|
|
|
def close(self):
|
|
raise NotImplementedError
|
|
|
|
def release(self):
|
|
raise NotImplementedError
|
|
|
|
|
|
def getremotechanges(ui, repo, other, onlyheads=None, bundlename=None, force=False):
|
|
"""obtains a bundle of changes incoming from other
|
|
|
|
"onlyheads" restricts the returned changes to those reachable from the
|
|
specified heads.
|
|
"bundlename", if given, stores the bundle to this file path permanently;
|
|
otherwise it's stored to a temp file and gets deleted again when you call
|
|
the returned "cleanupfn".
|
|
"force" indicates whether to proceed on unrelated repos.
|
|
|
|
Returns a tuple (local, csets, cleanupfn):
|
|
|
|
"local" is a local repo from which to obtain the actual incoming
|
|
changesets; it is a bundlerepo for the obtained bundle when the
|
|
original "other" is remote.
|
|
"csets" lists the incoming changeset node ids.
|
|
"cleanupfn" must be called without arguments when you're done processing
|
|
the changes; it closes both the original "other" and the one returned
|
|
here.
|
|
"""
|
|
tmp = discovery.findcommonincoming(repo, other, heads=onlyheads, force=force)
|
|
common, incoming, rheads = tmp
|
|
if not incoming:
|
|
try:
|
|
if bundlename:
|
|
os.unlink(bundlename)
|
|
except OSError:
|
|
pass
|
|
return repo, [], other.close
|
|
|
|
commonset = set(common)
|
|
rheads = [x for x in rheads if x not in commonset]
|
|
|
|
bundle = None
|
|
bundlerepo = None
|
|
localrepo = other.local()
|
|
if bundlename or not localrepo:
|
|
# create a bundle (uncompressed if other repo is not local)
|
|
|
|
# developer config: devel.legacy.exchange
|
|
legexc = ui.configlist("devel", "legacy.exchange")
|
|
forcebundle1 = "bundle2" not in legexc and "bundle1" in legexc
|
|
canbundle2 = (
|
|
not forcebundle1 and other.capable("getbundle") and other.capable("bundle2")
|
|
)
|
|
if canbundle2:
|
|
kwargs = {}
|
|
kwargs[r"common"] = common
|
|
kwargs[r"heads"] = rheads
|
|
kwargs[r"bundlecaps"] = exchange.caps20to10(repo)
|
|
kwargs[r"cg"] = True
|
|
b2 = other.getbundle("incoming", **kwargs)
|
|
fname = bundle = changegroup.writechunks(
|
|
ui, b2._forwardchunks(), bundlename
|
|
)
|
|
else:
|
|
if other.capable("getbundle"):
|
|
cg = other.getbundle("incoming", common=common, heads=rheads)
|
|
elif onlyheads is None and not other.capable("changegroupsubset"):
|
|
# compat with older servers when pulling all remote heads
|
|
cg = other.changegroup(incoming, "incoming")
|
|
rheads = None
|
|
else:
|
|
cg = other.changegroupsubset(incoming, rheads, "incoming")
|
|
if localrepo:
|
|
bundletype = "HG10BZ"
|
|
else:
|
|
bundletype = "HG10UN"
|
|
fname = bundle = bundle2.writebundle(ui, cg, bundlename, bundletype)
|
|
# keep written bundle?
|
|
if bundlename:
|
|
bundle = None
|
|
if not localrepo:
|
|
# use the created uncompressed bundlerepo
|
|
localrepo = bundlerepo = bundlerepository(repo.baseui, repo.root, fname)
|
|
# this repo contains local and other now, so filter out local again
|
|
common = repo.heads()
|
|
|
|
csets = localrepo.changelog.findmissing(common, rheads)
|
|
|
|
if bundlerepo:
|
|
cl = bundlerepo.changelog
|
|
reponodes = cl.bundlenodes
|
|
remotephases = other.listkeys("phases")
|
|
|
|
pullop = exchange.pulloperation(bundlerepo, other, heads=reponodes)
|
|
pullop.trmanager = bundletransactionmanager()
|
|
exchange._pullapplyphases(pullop, remotephases)
|
|
|
|
def cleanup():
|
|
if bundlerepo:
|
|
bundlerepo.close()
|
|
if bundle:
|
|
os.unlink(bundle)
|
|
other.close()
|
|
|
|
return (localrepo, csets, cleanup)
|