bundlerepo: port to new bundle API

mercurial/bundlerepo.py

@@ -1,322 +1,319
 # bundlerepo.py - repository class for viewing uncompressed bundles
 #
 # Copyright 2006, 2007 Benoit Boissinot <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 """Repository class for viewing uncompressed bundles.
 
 This provides a read-only repository interface to bundles as if they
 were part of the actual repository.
 """
 
 from node import nullid
 from i18n import _
 import os, struct, tempfile, shutil
 import changegroup, util, mdiff, discovery
 import localrepo, changelog, manifest, filelog, revlog, error
 
 class bundlerevlog(revlog.revlog):
-    def __init__(self, opener, indexfile, bundle,
-                 linkmapper=None):
+    def __init__(self, opener, indexfile, bundle, linkmapper):
         # How it works:
         # to retrieve a revision, we need to know the offset of
         # the revision in the bundle (an unbundle object).
         #
         # 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)
         self.bundle = bundle
         self.basemap = {}
-        def chunkpositer():
-            while 1:
-                chunk = bundle.chunk()
-                if not chunk:
-                    break
-                pos = bundle.tell()
-                yield chunk, pos - len(chunk)
         n = len(self)
-        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])
+        chain = None
+        while 1:
+            chunkdata = bundle.parsechunk(chain)
+            if not chunkdata:
+                break
+            node = chunkdata['node']
+            p1 = chunkdata['p1']
+            p2 = chunkdata['p2']
+            cs = chunkdata['cs']
+            deltabase = chunkdata['deltabase']
+            delta = chunkdata['delta']
+
+            size = len(delta)
+            start = bundle.tell() - size
+
+            link = linkmapper(cs)
             if node in self.nodemap:
-                prev = node
+                # this can happen if two branches make the same change
+                chain = node
                 continue
+
             for p in (p1, p2):
                 if not p in self.nodemap:
                     raise error.LookupError(p, self.indexfile,
                                             _("unknown parent"))
-            if linkmapper is None:
-                link = n
-            else:
-                link = linkmapper(cs)
-
-            if not prev:
-                prev = p1
             # start, size, full unc. size, base (unused), link, p1, p2, node
             e = (revlog.offset_type(start, 0), size, -1, -1, link,
                  self.rev(p1), self.rev(p2), node)
-            self.basemap[n] = prev
+            self.basemap[n] = deltabase
             self.index.insert(-1, e)
             self.nodemap[node] = n
-            prev = node
+            chain = node
             n += 1
 
     def inbundle(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):
         # Warning: in case of bundle, the diff is against bundlebase,
         # not against rev - 1
         # XXX: could use some caching
         if not self.inbundle(rev):
             return revlog.revlog._chunk(self, rev)
         self.bundle.seek(self.start(rev))
         return self.bundle.read(self.length(rev))
 
     def revdiff(self, rev1, rev2):
         """return or calculate a delta between two revisions"""
         if self.inbundle(rev1) and self.inbundle(rev2):
             # hot path for bundle
             revb = self.rev(self.bundlebase(rev2))
             if revb == rev1:
                 return self._chunk(rev2)
         elif not self.inbundle(rev1) and not self.inbundle(rev2):
             return revlog.revlog.revdiff(self, rev1, rev2)
 
         return mdiff.textdiff(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.inbundle(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 = mdiff.patches(text, [delta])
 
         p1, p2 = self.parents(node)
         if node != revlog.hash(text, p1, p2):
             raise error.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):
         raise NotImplementedError
     def strip(self, rev, minlink):
         raise NotImplementedError
     def checksize(self):
         raise NotImplementedError
 
 class bundlechangelog(bundlerevlog, changelog.changelog):
     def __init__(self, opener, bundle):
         changelog.changelog.__init__(self, opener)
-        bundlerevlog.__init__(self, opener, self.indexfile, bundle)
+        linkmapper = lambda x: x
+        bundlerevlog.__init__(self, opener, self.indexfile, bundle,
+                              linkmapper)
 
 class bundlemanifest(bundlerevlog, manifest.manifest):
     def __init__(self, opener, bundle, linkmapper):
         manifest.manifest.__init__(self, opener)
         bundlerevlog.__init__(self, opener, self.indexfile, bundle,
                               linkmapper)
 
 class bundlefilelog(bundlerevlog, filelog.filelog):
     def __init__(self, opener, path, bundle, linkmapper):
         filelog.filelog.__init__(self, opener, path)
         bundlerevlog.__init__(self, opener, self.indexfile, bundle,
                               linkmapper)
 
 class bundlerepository(localrepo.localrepository):
     def __init__(self, ui, path, bundlename):
         self._tempparent = None
         try:
             localrepo.localrepository.__init__(self, ui, path)
         except error.RepoError:
             self._tempparent = tempfile.mkdtemp()
             localrepo.instance(ui, self._tempparent, 1)
             localrepo.localrepository.__init__(self, ui, self._tempparent)
 
         if path:
             self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename
         else:
             self._url = 'bundle:' + bundlename
 
         self.tempfile = None
         f = util.posixfile(bundlename, "rb")
         self.bundle = changegroup.readbundle(f, bundlename)
         if self.bundle.compressed():
             fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-",
                                             suffix=".hg10un", dir=self.path)
             self.tempfile = temp
             fptemp = os.fdopen(fdtemp, 'wb')
 
             try:
                 fptemp.write("HG10UN")
                 while 1:
                     chunk = self.bundle.read(2**18)
                     if not chunk:
                         break
                     fptemp.write(chunk)
             finally:
                 fptemp.close()
 
             f = util.posixfile(self.tempfile, "rb")
             self.bundle = changegroup.readbundle(f, bundlename)
 
         # dict with the mapping 'filename' -> position in the bundle
         self.bundlefilespos = {}
 
     @util.propertycache
     def changelog(self):
         c = bundlechangelog(self.sopener, self.bundle)
         self.manstart = self.bundle.tell()
         return c
 
     @util.propertycache
     def manifest(self):
         self.bundle.seek(self.manstart)
         m = bundlemanifest(self.sopener, self.bundle, self.changelog.rev)
         self.filestart = self.bundle.tell()
         return m
 
     @util.propertycache
     def manstart(self):
         self.changelog
         return self.manstart
 
     @util.propertycache
     def filestart(self):
         self.manifest
         return self.filestart
 
     def url(self):
         return self._url
 
     def file(self, f):
         if not self.bundlefilespos:
             self.bundle.seek(self.filestart)
             while 1:
                 chunk = self.bundle.chunk()
                 if not chunk:
                     break
                 self.bundlefilespos[chunk] = self.bundle.tell()
                 while 1:
                     c = self.bundle.chunk()
                     if not c:
                         break
 
         if f[0] == '/':
             f = f[1:]
         if f in self.bundlefilespos:
             self.bundle.seek(self.bundlefilespos[f])
             return bundlefilelog(self.sopener, f, self.bundle,
                                  self.changelog.rev)
         else:
             return filelog.filelog(self.sopener, f)
 
     def close(self):
         """Close assigned bundle file immediately."""
         self.bundle.close()
         if self.tempfile is not None:
             os.unlink(self.tempfile)
         if self._tempparent:
             shutil.rmtree(self._tempparent, True)
 
     def cancopy(self):
         return False
 
     def getcwd(self):
         return os.getcwd() # always outside the repo
 
 def instance(ui, path, create):
     if create:
         raise util.Abort(_('cannot create new bundle repository'))
     parentpath = ui.config("bundle", "mainreporoot", "")
     if parentpath:
         # Try to make the full path relative so we get a nice, short URL.
         # In particular, we don't want temp dir names in test outputs.
         cwd = os.getcwd()
         if parentpath == cwd:
             parentpath = ''
         else:
             cwd = os.path.join(cwd,'')
             if parentpath.startswith(cwd):
                 parentpath = parentpath[len(cwd):]
     u = util.url(path)
     path = u.localpath()
     if u.scheme == 'bundle':
         s = path.split("+", 1)
         if len(s) == 1:
             repopath, bundlename = parentpath, s[0]
         else:
             repopath, bundlename = s
     else:
         repopath, bundlename = parentpath, path
     return bundlerepository(ui, repopath, bundlename)
 
 def getremotechanges(ui, repo, other, revs=None, bundlename=None,
                      force=False):
     tmp = discovery.findcommonincoming(repo, other, heads=revs, force=force)
     common, incoming, rheads = tmp
     if not incoming:
         try:
             os.unlink(bundlename)
         except OSError:
             pass
         return other, None, None, None
 
     bundle = None
     if bundlename or not other.local():
         # create a bundle (uncompressed if other repo is not local)
 
         if revs is None and other.capable('changegroupsubset'):
             revs = rheads
 
         if other.capable('getbundle'):
             cg = other.getbundle('incoming', common=common, heads=revs)
         elif revs is None:
             cg = other.changegroup(incoming, "incoming")
         else:
             cg = other.changegroupsubset(incoming, revs, 'incoming')
         bundletype = other.local() and "HG10BZ" or "HG10UN"
         fname = bundle = changegroup.writebundle(cg, bundlename, bundletype)
         # keep written bundle?
         if bundlename:
             bundle = None
         if not other.local():
             # use the created uncompressed bundlerepo
             other = bundlerepository(ui, repo.root, fname)
     return (other, common, incoming, bundle)