rust: implement the `Graph` trait for all revlogs
This is trivial and makes all the algorithms relying on the trait usable
for more use cases.
# filelog.py - file history class for mercurial
#
# Copyright 2005-2007 Olivia Mackall <olivia@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from .i18n import _
from .node import nullrev
from . import (
error,
revlog,
)
from .interfaces import (
repository,
util as interfaceutil,
)
from .utils import storageutil
from .revlogutils import (
constants as revlog_constants,
rewrite,
)
@interfaceutil.implementer(repository.ifilestorage)
class filelog:
def __init__(self, opener, path, try_split=False):
self._revlog = revlog.revlog(
opener,
# XXX should use the unencoded path
target=(revlog_constants.KIND_FILELOG, path),
radix=b'/'.join((b'data', path)),
censorable=True,
canonical_parent_order=False, # see comment in revlog.py
try_split=try_split,
)
# Full name of the user visible file, relative to the repository root.
# Used by LFS.
self._revlog.filename = path
self.nullid = self._revlog.nullid
opts = opener.options
self._fix_issue6528 = opts.get(b'issue6528.fix-incoming', True)
def get_revlog(self):
"""return an actual revlog instance if any
This exist because a lot of code leverage the fact the underlying
storage is a revlog for optimization, so giving simple way to access
the revlog instance helps such code.
"""
return self._revlog
def __len__(self):
return len(self._revlog)
def __iter__(self):
return self._revlog.__iter__()
def hasnode(self, node):
if node in (self.nullid, nullrev):
return False
try:
self._revlog.rev(node)
return True
except (TypeError, ValueError, IndexError, error.LookupError):
return False
def revs(self, start=0, stop=None):
return self._revlog.revs(start=start, stop=stop)
def parents(self, node):
return self._revlog.parents(node)
def parentrevs(self, rev):
return self._revlog.parentrevs(rev)
def rev(self, node):
return self._revlog.rev(node)
def node(self, rev):
return self._revlog.node(rev)
def lookup(self, node):
return storageutil.fileidlookup(
self._revlog, node, self._revlog.display_id
)
def linkrev(self, rev):
return self._revlog.linkrev(rev)
def commonancestorsheads(self, node1, node2):
return self._revlog.commonancestorsheads(node1, node2)
# Used by dagop.blockdescendants().
def descendants(self, revs):
return self._revlog.descendants(revs)
def heads(self, start=None, stop=None):
return self._revlog.heads(start, stop)
# Used by hgweb, children extension.
def children(self, node):
return self._revlog.children(node)
def iscensored(self, rev):
return self._revlog.iscensored(rev)
def revision(self, node, _df=None):
return self._revlog.revision(node, _df=_df)
def rawdata(self, node, _df=None):
return self._revlog.rawdata(node, _df=_df)
def emitrevisions(
self,
nodes,
nodesorder=None,
revisiondata=False,
assumehaveparentrevisions=False,
deltamode=repository.CG_DELTAMODE_STD,
sidedata_helpers=None,
debug_info=None,
):
return self._revlog.emitrevisions(
nodes,
nodesorder=nodesorder,
revisiondata=revisiondata,
assumehaveparentrevisions=assumehaveparentrevisions,
deltamode=deltamode,
sidedata_helpers=sidedata_helpers,
debug_info=debug_info,
)
def addrevision(
self,
revisiondata,
transaction,
linkrev,
p1,
p2,
node=None,
flags=revlog.REVIDX_DEFAULT_FLAGS,
cachedelta=None,
):
return self._revlog.addrevision(
revisiondata,
transaction,
linkrev,
p1,
p2,
node=node,
flags=flags,
cachedelta=cachedelta,
)
def addgroup(
self,
deltas,
linkmapper,
transaction,
addrevisioncb=None,
duplicaterevisioncb=None,
maybemissingparents=False,
debug_info=None,
delta_base_reuse_policy=None,
):
if maybemissingparents:
raise error.Abort(
_(
b'revlog storage does not support missing '
b'parents write mode'
)
)
with self._revlog._writing(transaction):
if self._fix_issue6528:
deltas = rewrite.filter_delta_issue6528(self._revlog, deltas)
return self._revlog.addgroup(
deltas,
linkmapper,
transaction,
addrevisioncb=addrevisioncb,
duplicaterevisioncb=duplicaterevisioncb,
debug_info=debug_info,
delta_base_reuse_policy=delta_base_reuse_policy,
)
def getstrippoint(self, minlink):
return self._revlog.getstrippoint(minlink)
def strip(self, minlink, transaction):
return self._revlog.strip(minlink, transaction)
def censorrevision(self, tr, node, tombstone=b''):
return self._revlog.censorrevision(tr, node, tombstone=tombstone)
def files(self):
return self._revlog.files()
def read(self, node):
return storageutil.filtermetadata(self.revision(node))
def add(self, text, meta, transaction, link, p1=None, p2=None):
if meta or text.startswith(b'\1\n'):
text = storageutil.packmeta(meta, text)
rev = self.addrevision(text, transaction, link, p1, p2)
return self.node(rev)
def renamed(self, node):
return storageutil.filerevisioncopied(self, node)
def size(self, rev):
"""return the size of a given revision"""
# for revisions with renames, we have to go the slow way
node = self.node(rev)
if self.iscensored(rev):
return 0
if self.renamed(node):
return len(self.read(node))
# XXX if self.read(node).startswith("\1\n"), this returns (size+4)
# XXX See also basefilectx.cmp.
return self._revlog.size(rev)
def cmp(self, node, text):
"""compare text with a given file revision
returns True if text is different than what is stored.
"""
return not storageutil.filedataequivalent(self, node, text)
def verifyintegrity(self, state):
return self._revlog.verifyintegrity(state)
def storageinfo(
self,
exclusivefiles=False,
sharedfiles=False,
revisionscount=False,
trackedsize=False,
storedsize=False,
):
return self._revlog.storageinfo(
exclusivefiles=exclusivefiles,
sharedfiles=sharedfiles,
revisionscount=revisionscount,
trackedsize=trackedsize,
storedsize=storedsize,
)
# Used by repo upgrade.
def clone(self, tr, destrevlog, **kwargs):
if not isinstance(destrevlog, filelog):
msg = b'expected filelog to clone(), not %r'
msg %= destrevlog
raise error.ProgrammingError(msg)
return self._revlog.clone(tr, destrevlog._revlog, **kwargs)
class narrowfilelog(filelog):
"""Filelog variation to be used with narrow stores."""
def __init__(self, opener, path, narrowmatch, try_split=False):
super(narrowfilelog, self).__init__(opener, path, try_split=try_split)
self._narrowmatch = narrowmatch
def renamed(self, node):
res = super(narrowfilelog, self).renamed(node)
# Renames that come from outside the narrowspec are problematic
# because we may lack the base text for the rename. This can result
# in code attempting to walk the ancestry or compute a diff
# encountering a missing revision. We address this by silently
# removing rename metadata if the source file is outside the
# narrow spec.
#
# A better solution would be to see if the base revision is available,
# rather than assuming it isn't.
#
# An even better solution would be to teach all consumers of rename
# metadata that the base revision may not be available.
#
# TODO consider better ways of doing this.
if res and not self._narrowmatch(res[0]):
return None
return res
def size(self, rev):
# Because we have a custom renamed() that may lie, we need to call
# the base renamed() to report accurate results.
node = self.node(rev)
if super(narrowfilelog, self).renamed(node):
return len(self.read(node))
else:
return super(narrowfilelog, self).size(rev)
def cmp(self, node, text):
# We don't call `super` because narrow parents can be buggy in case of a
# ambiguous dirstate. Always take the slow path until there is a better
# fix, see issue6150.
# Censored files compare against the empty file.
if self.iscensored(self.rev(node)):
return text != b''
return self.read(node) != text