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# filelog.py - file history class for mercurial
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#
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# Copyright 2005-2007 Matt Mackall <mpm@selenic.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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from __future__ import absolute_import
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from . import (
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error,
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repository,
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revlog,
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)
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from .utils import (
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interfaceutil,
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)
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@interfaceutil.implementer(repository.ifilestorage)
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class filelog(object):
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def __init__(self, opener, path):
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self._revlog = revlog.revlog(opener,
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'/'.join(('data', path + '.i')),
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censorable=True)
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# Full name of the user visible file, relative to the repository root.
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# Used by LFS.
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self.filename = path
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# Used by repo upgrade.
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self.index = self._revlog.index
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# Used by verify.
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self.version = self._revlog.version
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# Used by changegroup generation.
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self._generaldelta = self._revlog._generaldelta
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def __len__(self):
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return len(self._revlog)
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def __iter__(self):
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return self._revlog.__iter__()
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def revs(self, start=0, stop=None):
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return self._revlog.revs(start=start, stop=stop)
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def parents(self, node):
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return self._revlog.parents(node)
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def parentrevs(self, rev):
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return self._revlog.parentrevs(rev)
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def rev(self, node):
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return self._revlog.rev(node)
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def node(self, rev):
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return self._revlog.node(rev)
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def lookup(self, node):
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return self._revlog.lookup(node)
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def linkrev(self, rev):
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return self._revlog.linkrev(rev)
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# Used by LFS, verify.
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def flags(self, rev):
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return self._revlog.flags(rev)
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def commonancestorsheads(self, node1, node2):
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return self._revlog.commonancestorsheads(node1, node2)
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# Used by dagop.blockdescendants().
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def descendants(self, revs):
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return self._revlog.descendants(revs)
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def heads(self, start=None, stop=None):
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return self._revlog.heads(start, stop)
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# Used by hgweb, children extension.
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def children(self, node):
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return self._revlog.children(node)
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def deltaparent(self, rev):
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return self._revlog.deltaparent(rev)
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def iscensored(self, rev):
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return self._revlog.iscensored(rev)
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# Used by verify.
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def rawsize(self, rev):
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return self._revlog.rawsize(rev)
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# Might be unused.
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def checkhash(self, text, node, p1=None, p2=None, rev=None):
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return self._revlog.checkhash(text, node, p1=p1, p2=p2, rev=rev)
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def revision(self, node, _df=None, raw=False):
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return self._revlog.revision(node, _df=_df, raw=raw)
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def revdiff(self, rev1, rev2):
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return self._revlog.revdiff(rev1, rev2)
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def emitrevisiondeltas(self, requests):
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return self._revlog.emitrevisiondeltas(requests)
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def addrevision(self, revisiondata, transaction, linkrev, p1, p2,
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node=None, flags=revlog.REVIDX_DEFAULT_FLAGS,
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cachedelta=None):
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return self._revlog.addrevision(revisiondata, transaction, linkrev,
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p1, p2, node=node, flags=flags,
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cachedelta=cachedelta)
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def addgroup(self, deltas, linkmapper, transaction, addrevisioncb=None):
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return self._revlog.addgroup(deltas, linkmapper, transaction,
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addrevisioncb=addrevisioncb)
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def getstrippoint(self, minlink):
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return self._revlog.getstrippoint(minlink)
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def strip(self, minlink, transaction):
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return self._revlog.strip(minlink, transaction)
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def censorrevision(self, tr, node, tombstone=b''):
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return self._revlog.censorrevision(node, tombstone=tombstone)
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def files(self):
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return self._revlog.files()
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# Used by verify.
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def checksize(self):
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return self._revlog.checksize()
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def read(self, node):
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t = self.revision(node)
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if not t.startswith('\1\n'):
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return t
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s = t.index('\1\n', 2)
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return t[s + 2:]
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def add(self, text, meta, transaction, link, p1=None, p2=None):
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if meta or text.startswith('\1\n'):
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text = revlog.packmeta(meta, text)
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return self.addrevision(text, transaction, link, p1, p2)
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def renamed(self, node):
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if self.parents(node)[0] != revlog.nullid:
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return False
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t = self.revision(node)
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m = revlog.parsemeta(t)[0]
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# copy and copyrev occur in pairs. In rare cases due to bugs,
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# one can occur without the other.
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if m and "copy" in m and "copyrev" in m:
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return (m["copy"], revlog.bin(m["copyrev"]))
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return False
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def size(self, rev):
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"""return the size of a given revision"""
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# for revisions with renames, we have to go the slow way
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node = self.node(rev)
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if self.renamed(node):
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return len(self.read(node))
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if self.iscensored(rev):
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return 0
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# XXX if self.read(node).startswith("\1\n"), this returns (size+4)
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return self._revlog.size(rev)
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def cmp(self, node, text):
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"""compare text with a given file revision
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returns True if text is different than what is stored.
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"""
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t = text
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if text.startswith('\1\n'):
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t = '\1\n\1\n' + text
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samehashes = not self._revlog.cmp(node, t)
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if samehashes:
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return False
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# censored files compare against the empty file
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if self.iscensored(self.rev(node)):
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return text != ''
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# renaming a file produces a different hash, even if the data
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# remains unchanged. Check if it's the case (slow):
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if self.renamed(node):
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t2 = self.read(node)
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return t2 != text
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return True
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# TODO these aren't part of the interface and aren't internal methods.
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# Callers should be fixed to not use them.
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# Used by LFS.
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@property
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def filename(self):
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return self._revlog.filename
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@filename.setter
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def filename(self, value):
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self._revlog.filename = value
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# Used by bundlefilelog, unionfilelog.
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@property
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def indexfile(self):
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return self._revlog.indexfile
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@indexfile.setter
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def indexfile(self, value):
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self._revlog.indexfile = value
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# Used by LFS, repo upgrade.
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@property
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def opener(self):
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return self._revlog.opener
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# Used by repo upgrade.
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def clone(self, tr, destrevlog, **kwargs):
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if not isinstance(destrevlog, filelog):
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raise error.ProgrammingError('expected filelog to clone()')
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return self._revlog.clone(tr, destrevlog._revlog, **kwargs)
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class narrowfilelog(filelog):
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"""Filelog variation to be used with narrow stores."""
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def __init__(self, opener, path, narrowmatch):
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super(narrowfilelog, self).__init__(opener, path)
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self._narrowmatch = narrowmatch
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def renamed(self, node):
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res = super(narrowfilelog, self).renamed(node)
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# Renames that come from outside the narrowspec are problematic
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# because we may lack the base text for the rename. This can result
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# in code attempting to walk the ancestry or compute a diff
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# encountering a missing revision. We address this by silently
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# removing rename metadata if the source file is outside the
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# narrow spec.
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#
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# A better solution would be to see if the base revision is available,
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# rather than assuming it isn't.
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#
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# An even better solution would be to teach all consumers of rename
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# metadata that the base revision may not be available.
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#
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# TODO consider better ways of doing this.
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if res and not self._narrowmatch(res[0]):
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return None
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return res
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def size(self, rev):
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# Because we have a custom renamed() that may lie, we need to call
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# the base renamed() to report accurate results.
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node = self.node(rev)
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if super(narrowfilelog, self).renamed(node):
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return len(self.read(node))
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else:
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return super(narrowfilelog, self).size(rev)
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def cmp(self, node, text):
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different = super(narrowfilelog, self).cmp(node, text)
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# Because renamed() may lie, we may get false positives for
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# different content. Check for this by comparing against the original
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# renamed() implementation.
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if different:
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if super(narrowfilelog, self).renamed(node):
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t2 = self.read(node)
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return t2 != text
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return different
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