Mercurial > hg
view mercurial/bundlerepo.py @ 3551:3b07e223534b
Only read .hg/hgrc files from trusted users/groups
The list of trusted users and groups is specified in the [trusted]
section of a hgrc; the current user is always trusted; "*" can be
used to trust all users/groups.
Global hgrc files are always read.
On Windows (and other systems that don't have the pwd and grp modules),
all .hg/hgrc files are read.
This is essentially the same patch that was previously applied as
revision 494521a3f142.
author | Alexis S. L. Carvalho <alexis@cecm.usp.br> |
---|---|
date | Thu, 26 Oct 2006 19:25:44 +0200 |
parents | b19360aa21e9 |
children | 0ed2732aa393 |
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""" bundlerepo.py - repository class for viewing uncompressed bundles This provides a read-only repository interface to bundles as if they were part of the actual repository. Copyright 2006 Benoit Boissinot <benoit.boissinot@ens-lyon.org> This software may be used and distributed according to the terms of the GNU General Public License, incorporated herein by reference. """ from node import * from i18n import gettext as _ from demandload import demandload demandload(globals(), "changegroup util os struct bz2 tempfile") import localrepo, changelog, manifest, filelog, revlog class bundlerevlog(revlog.revlog): def __init__(self, opener, indexfile, datafile, bundlefile, linkmapper=None): # How it works: # to retrieve a revision, we need to know the offset of # the revision in the bundlefile (an opened file). # # We store this offset in the index (start), to differentiate a # rev in the bundle and from a rev in the revlog, we check # len(index[r]). If the tuple is bigger than 7, it is a bundle # (it is bigger since we store the node to which the delta is) # revlog.revlog.__init__(self, opener, indexfile, datafile) self.bundlefile = bundlefile self.basemap = {} def chunkpositer(): for chunk in changegroup.chunkiter(bundlefile): pos = bundlefile.tell() yield chunk, pos - len(chunk) n = self.count() prev = None for chunk, start in chunkpositer(): size = len(chunk) if size < 80: raise util.Abort("invalid changegroup") start += 80 size -= 80 node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80]) if node in self.nodemap: prev = node continue for p in (p1, p2): if not p in self.nodemap: raise revlog.RevlogError(_("unknown parent %s") % short(p1)) if linkmapper is None: link = n else: link = linkmapper(cs) if not prev: prev = p1 # start, size, base is not used, link, p1, p2, delta ref if self.version == 0: e = (start, size, None, link, p1, p2, node) else: e = (self.offset_type(start, 0), size, -1, None, link, self.rev(p1), self.rev(p2), node) self.basemap[n] = prev self.index.append(e) self.nodemap[node] = n prev = node n += 1 def bundle(self, rev): """is rev from the bundle""" if rev < 0: return False return rev in self.basemap def bundlebase(self, rev): return self.basemap[rev] def chunk(self, rev, df=None, cachelen=4096): # Warning: in case of bundle, the diff is against bundlebase, # not against rev - 1 # XXX: could use some caching if not self.bundle(rev): return revlog.revlog.chunk(self, rev, df, cachelen) self.bundlefile.seek(self.start(rev)) return self.bundlefile.read(self.length(rev)) def revdiff(self, rev1, rev2): """return or calculate a delta between two revisions""" if self.bundle(rev1) and self.bundle(rev2): # hot path for bundle revb = self.rev(self.bundlebase(rev2)) if revb == rev1: return self.chunk(rev2) elif not self.bundle(rev1) and not self.bundle(rev2): return revlog.revlog.chunk(self, rev1, rev2) return self.diff(self.revision(self.node(rev1)), self.revision(self.node(rev2))) def revision(self, node): """return an uncompressed revision of a given""" if node == nullid: return "" text = None chain = [] iter_node = node rev = self.rev(iter_node) # reconstruct the revision if it is from a changegroup while self.bundle(rev): if self.cache and self.cache[0] == iter_node: text = self.cache[2] break chain.append(rev) iter_node = self.bundlebase(rev) rev = self.rev(iter_node) if text is None: text = revlog.revlog.revision(self, iter_node) while chain: delta = self.chunk(chain.pop()) text = self.patches(text, [delta]) p1, p2 = self.parents(node) if node != revlog.hash(text, p1, p2): raise revlog.RevlogError(_("integrity check failed on %s:%d") % (self.datafile, self.rev(node))) self.cache = (node, self.rev(node), text) return text def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): raise NotImplementedError def addgroup(self, revs, linkmapper, transaction, unique=0): raise NotImplementedError def strip(self, rev, minlink): raise NotImplementedError def checksize(self): raise NotImplementedError class bundlechangelog(bundlerevlog, changelog.changelog): def __init__(self, opener, bundlefile): changelog.changelog.__init__(self, opener) bundlerevlog.__init__(self, opener, "00changelog.i", "00changelog.d", bundlefile) class bundlemanifest(bundlerevlog, manifest.manifest): def __init__(self, opener, bundlefile, linkmapper): manifest.manifest.__init__(self, opener) bundlerevlog.__init__(self, opener, self.indexfile, self.datafile, bundlefile, linkmapper) class bundlefilelog(bundlerevlog, filelog.filelog): def __init__(self, opener, path, bundlefile, linkmapper): filelog.filelog.__init__(self, opener, path) bundlerevlog.__init__(self, opener, self.indexfile, self.datafile, bundlefile, linkmapper) class bundlerepository(localrepo.localrepository): def __init__(self, ui, path, bundlename): localrepo.localrepository.__init__(self, ui, path) self._url = 'bundle:' + bundlename if path: self._url += '+' + path self.tempfile = None self.bundlefile = open(bundlename, "rb") header = self.bundlefile.read(6) if not header.startswith("HG"): raise util.Abort(_("%s: not a Mercurial bundle file") % bundlename) elif not header.startswith("HG10"): raise util.Abort(_("%s: unknown bundle version") % bundlename) elif header == "HG10BZ": fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-", suffix=".hg10un", dir=self.path) self.tempfile = temp fptemp = os.fdopen(fdtemp, 'wb') def generator(f): zd = bz2.BZ2Decompressor() zd.decompress("BZ") for chunk in f: yield zd.decompress(chunk) gen = generator(util.filechunkiter(self.bundlefile, 4096)) try: fptemp.write("HG10UN") for chunk in gen: fptemp.write(chunk) finally: fptemp.close() self.bundlefile.close() self.bundlefile = open(self.tempfile, "rb") # seek right after the header self.bundlefile.seek(6) elif header == "HG10UN": # nothing to do pass else: raise util.Abort(_("%s: unknown bundle compression type") % bundlename) self.changelog = bundlechangelog(self.opener, self.bundlefile) self.manifest = bundlemanifest(self.opener, self.bundlefile, self.changelog.rev) # dict with the mapping 'filename' -> position in the bundle self.bundlefilespos = {} while 1: f = changegroup.getchunk(self.bundlefile) if not f: break self.bundlefilespos[f] = self.bundlefile.tell() for c in changegroup.chunkiter(self.bundlefile): pass def url(self): return self._url def dev(self): return -1 def file(self, f): if f[0] == '/': f = f[1:] if f in self.bundlefilespos: self.bundlefile.seek(self.bundlefilespos[f]) return bundlefilelog(self.opener, f, self.bundlefile, self.changelog.rev) else: return filelog.filelog(self.opener, f) def close(self): """Close assigned bundle file immediately.""" self.bundlefile.close() def __del__(self): bundlefile = getattr(self, 'bundlefile', None) if bundlefile and not bundlefile.closed: bundlefile.close() tempfile = getattr(self, 'tempfile', None) if tempfile is not None: os.unlink(tempfile) def instance(ui, path, create): if create: raise util.Abort(_('cannot create new bundle repository')) path = util.drop_scheme('file', path) if path.startswith('bundle:'): path = util.drop_scheme('bundle', path) s = path.split("+", 1) if len(s) == 1: repopath, bundlename = "", s[0] else: repopath, bundlename = s else: repopath, bundlename = '', path return bundlerepository(ui, repopath, bundlename)