mercurial/statichttprepo.py
author Benoit Boissinot <benoit.boissinot@ens-lyon.org>
Fri, 01 Dec 2006 13:34:09 +0100
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child 3859 8c24b6fd5866
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# statichttprepo.py - simple http repository class for mercurial
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#
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# This provides read-only repo access to repositories exported via static http
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#
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# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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from demandload import *
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from i18n import gettext as _
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demandload(globals(), "changelog filelog httprangereader")
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demandload(globals(), "localrepo manifest os urllib urllib2 util")
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class rangereader(httprangereader.httprangereader):
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    def read(self, size=None):
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        try:
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            return httprangereader.httprangereader.read(self, size)
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        except urllib2.HTTPError, inst:
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            raise IOError(None, inst)
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        except urllib2.URLError, inst:
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            raise IOError(None, inst.reason[1])
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def opener(base):
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    """return a function that opens files over http"""
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    p = base
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    def o(path, mode="r"):
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        f = "/".join((p, urllib.quote(path)))
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        return rangereader(f)
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    return o
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class statichttprepository(localrepo.localrepository):
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    def __init__(self, ui, path):
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        self._url = path
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        self.ui = ui
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        self.revlogversion = 0
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        self.path = (path + "/.hg")
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        self.opener = opener(self.path)
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        # find requirements
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        try:
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            requirements = self.opener("requires").read().splitlines()
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        except IOError:
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            requirements = []
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        # check them
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        for r in requirements:
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            if r not in self.supported:
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                raise repo.RepoError(_("requirement '%s' not supported") % r)
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        # setup store
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        if "store" in requirements:
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            self.encodefn = util.encodefilename
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            self.decodefn = util.decodefilename
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            self.spath = self.path + "/store"
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        else:
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            self.encodefn = lambda x: x
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            self.decodefn = lambda x: x
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            self.spath = self.path
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        self.sopener = util.encodedopener(opener(self.spath), self.encodefn)
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        self.manifest = manifest.manifest(self.sopener)
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        self.changelog = changelog.changelog(self.sopener)
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        self.tagscache = None
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        self.nodetagscache = None
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        self.encodepats = None
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        self.decodepats = None
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    def url(self):
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        return 'static-' + self._url
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    def dev(self):
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        return -1
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    def local(self):
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        return False
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def instance(ui, path, create):
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    if create:
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        raise util.Abort(_('cannot create new static-http repository'))
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    if path.startswith('old-http:'):
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        ui.warn(_("old-http:// syntax is deprecated, "
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                  "please use static-http:// instead\n"))
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        path = path[4:]
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    else:
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        path = path[7:]
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    return statichttprepository(ui, path)