Mercurial > hg
view mercurial/statichttprepo.py @ 14270:d6907a5674a2
revlog: support writing generaldelta revlogs
With generaldelta switched on, deltas are always computed against the first
parent when adding revisions. This is done regardless of what revision the
incoming bundle, if any, is deltaed against.
The exact delta building strategy is subject to change, but this will not
affect compatibility.
Generaldelta is switched off by default.
author | Sune Foldager <cryo@cyanite.org> |
---|---|
date | Sun, 08 May 2011 21:32:33 +0200 |
parents | 135e244776f0 |
children | 58b36e9ea783 |
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# 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 version 2 or any later version. from i18n import _ import changelog, byterange, url, error import localrepo, manifest, util, scmutil, store import urllib, urllib2, errno class httprangereader(object): def __init__(self, url, opener): # we assume opener has HTTPRangeHandler self.url = url self.pos = 0 self.opener = opener self.name = url def seek(self, pos): self.pos = pos def read(self, bytes=None): req = urllib2.Request(self.url) end = '' if bytes: end = self.pos + bytes - 1 req.add_header('Range', 'bytes=%d-%s' % (self.pos, end)) try: f = self.opener.open(req) data = f.read() if hasattr(f, 'getcode'): # python 2.6+ code = f.getcode() elif hasattr(f, 'code'): # undocumented attribute, seems to be set in 2.4 and 2.5 code = f.code else: # Don't know how to check, hope for the best. code = 206 except urllib2.HTTPError, inst: num = inst.code == 404 and errno.ENOENT or None raise IOError(num, inst) except urllib2.URLError, inst: raise IOError(None, inst.reason[1]) if code == 200: # HTTPRangeHandler does nothing if remote does not support # Range headers and returns the full entity. Let's slice it. if bytes: data = data[self.pos:self.pos + bytes] else: data = data[self.pos:] elif bytes: data = data[:bytes] self.pos += len(data) return data def __iter__(self): return iter(self.read().splitlines(1)) def close(self): pass def build_opener(ui, authinfo): # urllib cannot handle URLs with embedded user or passwd urlopener = url.opener(ui, authinfo) urlopener.add_handler(byterange.HTTPRangeHandler()) class statichttpopener(scmutil.abstractopener): def __init__(self, base): self.base = base def __call__(self, path, mode="r", atomictemp=None): if mode not in ('r', 'rb'): raise IOError('Permission denied') f = "/".join((self.base, urllib.quote(path))) return httprangereader(f, urlopener) return statichttpopener class statichttprepository(localrepo.localrepository): def __init__(self, ui, path): self._url = path self.ui = ui self.root = path u = util.url(path.rstrip('/') + "/.hg") self.path, authinfo = u.authinfo() opener = build_opener(ui, authinfo) self.opener = opener(self.path) # find requirements try: requirements = self.opener.read("requires").splitlines() except IOError, inst: if inst.errno != errno.ENOENT: raise # check if it is a non-empty old-style repository try: fp = self.opener("00changelog.i") fp.read(1) fp.close() except IOError, inst: if inst.errno != errno.ENOENT: raise # we do not care about empty old-style repositories here msg = _("'%s' does not appear to be an hg repository") % path raise error.RepoError(msg) requirements = [] # check them for r in requirements: if r not in self.supported: raise error.RequirementError( _("requirement '%s' not supported") % r) # setup store self.store = store.store(requirements, self.path, opener) self.spath = self.store.path self.sopener = self.store.opener self.sjoin = self.store.join self.manifest = manifest.manifest(self.sopener) self.changelog = changelog.changelog(self.sopener) self._tags = None self.nodetagscache = None self._branchcache = None self._branchcachetip = None self.encodepats = None self.decodepats = None self.capabilities = self.capabilities.difference(["pushkey"]) def url(self): return self._url def local(self): return False def lock(self, wait=True): raise util.Abort(_('cannot lock static-http repository')) def instance(ui, path, create): if create: raise util.Abort(_('cannot create new static-http repository')) return statichttprepository(ui, path[7:])