bundlerepo: remove relative import, fix a comment

mercurial/bundlerepo.py

@@ -1,213 +1,208
 """
 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 <[e-mail]>
 
 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(), "util os struct")
 
-from changelog import changelog
-from manifest import manifest
-from filelog import filelog
-from localrepo import localrepository
-from revlog import *
+import localrepo, changelog, manifest, filelog, revlog
 
 def getchunk(source):
     """get a chunk from a group"""
     d = source.read(4)
     if not d:
         return ""
     l = struct.unpack(">l", d)[0]
     if l <= 4:
         return ""
     d = source.read(l - 4)
     if len(d) < l - 4:
         raise util.Abort(_("premature EOF reading chunk"
                            " (got %d bytes, expected %d)")
                           % (len(d), l - 4))
     return d
 
-class bundlerevlog(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.__init__(self, opener, indexfile, datafile)
+        revlog.revlog.__init__(self, opener, indexfile, datafile)
         self.bundlefile = bundlefile
         def genchunk():
             while 1:
                 pos = bundlefile.tell()
                 chunk = getchunk(bundlefile)
                 if not chunk:
                     break
                 yield chunk, pos + 4 # XXX struct.calcsize(">l") == 4
         n = self.count()
         prev = None
         for chunk, start in genchunk():
             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 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
-            # warning: 
             e = (start, size, None, link, p1, p2, node, 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 len(self.index[rev]) > 7
     def bundlebase(self, rev): return self.index[rev][7]
     def chunk(self, rev):
         # 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.chunk(self, rev)
+            return revlog.revlog.chunk(self, rev)
         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.chunk(self, rev1, 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.revision(self, iter_node)
+            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 != hash(text, p1, p2):
+        if node != revlog.hash(text, p1, p2):
             raise RevlogError(_("integrity check failed on %s:%d")
                           % (self.datafile, self.rev(node)))
 
         self.cache = (node, rev, 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):
+class bundlechangelog(bundlerevlog, changelog.changelog):
     def __init__(self, opener, bundlefile):
-        changelog.__init__(self, opener)
+        changelog.changelog.__init__(self, opener)
         bundlerevlog.__init__(self, opener, "00changelog.i", "00changelog.d",
                               bundlefile)
 
-class bundlemanifest(bundlerevlog, manifest):
+class bundlemanifest(bundlerevlog, manifest.manifest):
     def __init__(self, opener, bundlefile, linkmapper):
-        manifest.__init__(self, opener)
+        manifest.manifest.__init__(self, opener)
         bundlerevlog.__init__(self, opener, self.indexfile, self.datafile,
                               bundlefile, linkmapper)
 
-class bundlefilelog(bundlerevlog, filelog):
+class bundlefilelog(bundlerevlog, filelog.filelog):
     def __init__(self, opener, path, bundlefile, linkmapper):
-        filelog.__init__(self, opener, path)
+        filelog.filelog.__init__(self, opener, path)
         bundlerevlog.__init__(self, opener, self.indexfile, self.datafile,
                               bundlefile, linkmapper)
 
-class bundlerepository(localrepository):
+class bundlerepository(localrepo.localrepository):
     def __init__(self, ui, path, bundlename):
-        localrepository.__init__(self, ui, path)
+        localrepo.localrepository.__init__(self, ui, path)
         f = open(bundlename, "rb")
         s = os.fstat(f.fileno())
         self.bundlefile = f
         header = self.bundlefile.read(4)
         if header == "HG10":
             raise util.Abort(_("%s: compressed bundle not supported")
                              % bundlename)
         elif header != "HG11":
             raise util.Abort(_("%s: not a Mercurial bundle file") % 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 = getchunk(self.bundlefile)
                 if not f:
                     break
                 self.bundlefilespos[f] = self.bundlefile.tell()
                 while getchunk(self.bundlefile):
                     pass
 
     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(self.opener, f)
+            return filelog.filelog(self.opener, f)