exchange: move bundle specification parsing from cmdutil Clone bundles require a well-defined string to specify the type of bundle that is listed so clients can filter compatible file types. The `hg bundle` command and cmdutil.parsebundletype() already establish the beginnings of a bundle specification format. As part of formalizing this format specification so it can be used by clone bundles, we move the specification parsing bits verbatim to exchange.py, which is a more suitable place than cmdutil.py. A subsequent patch will refactor this code to make it more appropriate as a general API.

--- a/mercurial/commands.py	Tue Mar 24 00:28:28 2015 +0900
+++ b/mercurial/commands.py	Tue Oct 13 11:43:21 2015 -0700
@@ -1242,7 +1242,7 @@
         revs = scmutil.revrange(repo, opts['rev'])
 
     bundletype = opts.get('type', 'bzip2').lower()
-    cgversion, bcompression = cmdutil.parsebundletype(repo, bundletype)
+    cgversion, bcompression = exchange.parsebundlespec(repo, bundletype)
 
     if opts.get('all'):
         base = ['null']