revlog: fix revlogio.packentry corner case
We want to store version information about the revlog in the first
entry of its index. The code in packentry was using some heuristics
to detect whether this was the first entry, but these heuristics could
fail in some cases (e.g. rev 0 was empty; rev 1 descends directly from
the nullid and is stored as a delta).
We now give the revision number to packentry to avoid heuristics.
# statichttprepo.py - simple http repository class for mercurial
#
# This provides read-only repo access to repositories exported via static http
#
# 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, incorporated herein by reference.
from i18n import _
import changelog, filelog, httprangereader
import repo, localrepo, manifest, os, urllib, urllib2, util
class rangereader(httprangereader.httprangereader):
def read(self, size=None):
try:
return httprangereader.httprangereader.read(self, size)
except urllib2.HTTPError, inst:
raise IOError(None, inst)
except urllib2.URLError, inst:
raise IOError(None, inst.reason[1])
def opener(base):
"""return a function that opens files over http"""
p = base
def o(path, mode="r"):
f = "/".join((p, urllib.quote(path)))
return rangereader(f)
return o
class statichttprepository(localrepo.localrepository):
def __init__(self, ui, path):
self._url = path
self.ui = ui
self.path = path.rstrip('/') + "/.hg"
self.opener = opener(self.path)
# find requirements
try:
requirements = self.opener("requires").read().splitlines()
except IOError:
requirements = []
# check them
for r in requirements:
if r not in self.supported:
raise repo.RepoError(_("requirement '%s' not supported") % r)
# setup store
if "store" in requirements:
self.encodefn = util.encodefilename
self.decodefn = util.decodefilename
self.spath = self.path + "/store"
else:
self.encodefn = lambda x: x
self.decodefn = lambda x: x
self.spath = self.path
self.sopener = util.encodedopener(opener(self.spath), self.encodefn)
self.manifest = manifest.manifest(self.sopener)
self.changelog = changelog.changelog(self.sopener)
self.tagscache = None
self.nodetagscache = None
self.encodepats = None
self.decodepats = None
def url(self):
return 'static-' + self._url
def dev(self):
return -1
def local(self):
return False
def instance(ui, path, create):
if create:
raise util.Abort(_('cannot create new static-http repository'))
return statichttprepository(ui, path[7:])