filelog: stop proxying flags() (API)
Per-revision storage flags are kinda a revlog-centric API. (Except for
the fact that changegroup uses the same integer flags as revlog does
and there's minimal verification that the server's flags map to the
client's storage flags - but that's another problem.)
The last user of flags() was in verify.py and that code was just moved
into revlog.py and is accessed behind the verifyintegrity() file
storage API.
Since there are no more consumers, let's drop the proxy and remove
the method from the file storage interface.
This commit only drops the dedicated API for reading a single
revision's storage flags: we still support reading and writing flags
through the bulk data retrieval and add revision APIs. And since
changegroups encode revlog integer flags over the wire, we'll always
need to support flags at some level. The removal of individual storage
flags may be too premature. But since flags() is now unused, I'd like
to see how far we can get without that dedicated API - especially
since it uses revision numbers instead of nodes.
Differential Revision: https://phab.mercurial-scm.org/D4746
# filelog.py - file history class for mercurial
#
# Copyright 2005-2007 Matt Mackall <mpm@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 __future__ import absolute_import
from . import (
error,
repository,
revlog,
)
from .utils import (
interfaceutil,
)
@interfaceutil.implementer(repository.ifilestorage)
class filelog(object):
def __init__(self, opener, path):
self._revlog = revlog.revlog(opener,
'/'.join(('data', path + '.i')),
censorable=True)
# Full name of the user visible file, relative to the repository root.
# Used by LFS.
self._revlog.filename = path
def __len__(self):
return len(self._revlog)
def __iter__(self):
return self._revlog.__iter__()
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 self._revlog.lookup(node)
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 deltaparent(self, rev):
return self._revlog.deltaparent(rev)
def iscensored(self, rev):
return self._revlog.iscensored(rev)
# Unused.
def rawsize(self, rev):
return self._revlog.rawsize(rev)
# Might be unused.
def checkhash(self, text, node, p1=None, p2=None, rev=None):
return self._revlog.checkhash(text, node, p1=p1, p2=p2, rev=rev)
def revision(self, node, _df=None, raw=False):
return self._revlog.revision(node, _df=_df, raw=raw)
def revdiff(self, rev1, rev2):
return self._revlog.revdiff(rev1, rev2)
def emitrevisions(self, nodes, nodesorder=None,
revisiondata=False, assumehaveparentrevisions=False,
deltaprevious=False):
return self._revlog.emitrevisions(
nodes, nodesorder=nodesorder, revisiondata=revisiondata,
assumehaveparentrevisions=assumehaveparentrevisions,
deltaprevious=deltaprevious)
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):
return self._revlog.addgroup(deltas, linkmapper, transaction,
addrevisioncb=addrevisioncb)
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(node, tombstone=tombstone)
def files(self):
return self._revlog.files()
def read(self, node):
t = self.revision(node)
if not t.startswith('\1\n'):
return t
s = t.index('\1\n', 2)
return t[s + 2:]
def add(self, text, meta, transaction, link, p1=None, p2=None):
if meta or text.startswith('\1\n'):
text = revlog.packmeta(meta, text)
return self.addrevision(text, transaction, link, p1, p2)
def renamed(self, node):
if self.parents(node)[0] != revlog.nullid:
return False
t = self.revision(node)
m = revlog.parsemeta(t)[0]
# copy and copyrev occur in pairs. In rare cases due to bugs,
# one can occur without the other.
if m and "copy" in m and "copyrev" in m:
return (m["copy"], revlog.bin(m["copyrev"]))
return False
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.renamed(node):
return len(self.read(node))
if self.iscensored(rev):
return 0
# XXX if self.read(node).startswith("\1\n"), this returns (size+4)
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.
"""
t = text
if text.startswith('\1\n'):
t = '\1\n\1\n' + text
samehashes = not self._revlog.cmp(node, t)
if samehashes:
return False
# censored files compare against the empty file
if self.iscensored(self.rev(node)):
return text != ''
# renaming a file produces a different hash, even if the data
# remains unchanged. Check if it's the case (slow):
if self.renamed(node):
t2 = self.read(node)
return t2 != text
return True
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)
# TODO these aren't part of the interface and aren't internal methods.
# Callers should be fixed to not use them.
# Used by bundlefilelog, unionfilelog.
@property
def indexfile(self):
return self._revlog.indexfile
@indexfile.setter
def indexfile(self, value):
self._revlog.indexfile = value
# Unused.
@property
def opener(self):
return self._revlog.opener
# Used by repo upgrade.
def clone(self, tr, destrevlog, **kwargs):
if not isinstance(destrevlog, filelog):
raise error.ProgrammingError('expected filelog to clone()')
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):
super(narrowfilelog, self).__init__(opener, path)
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):
different = super(narrowfilelog, self).cmp(node, text)
# Because renamed() may lie, we may get false positives for
# different content. Check for this by comparing against the original
# renamed() implementation.
if different:
if super(narrowfilelog, self).renamed(node):
t2 = self.read(node)
return t2 != text
return different