add a new bundle type: uncompressed bundle

mercurial/commands.py

@@ -2492,16 +2492,20 b' def unbundle(ui, repo, fname, **opts):'
     """
     f = urllib.urlopen(fname)
 
-    if f.read(4) != "HG10":
-        raise util.Abort(_("%s: not a Mercurial bundle file") % fname)
-
-    def bzgenerator(f):
+    header = f.read(4)
+    if header == "HG10":
+        def generator(f):
         zd = bz2.BZ2Decompressor()
         for chunk in f:
             yield zd.decompress(chunk)
-
-    bzgen = bzgenerator(util.filechunkiter(f, 4096))
-    if repo.addchangegroup(util.chunkbuffer(bzgen)):
+    elif header == "HG11":
+        def generator(f):
+            for chunk in f:
+                yield chunk
+    else:
+        raise util.Abort(_("%s: not a Mercurial bundle file") % fname)
+    gen = generator(util.filechunkiter(f, 4096))
+    if repo.addchangegroup(util.chunkbuffer(gen)):
         return 1
 
     if opts['update']: