changegroup: replace getlocalchangegroupraw with makestream

As part of reducing the number of changegroup creation apis, let's replace calls
to getlocalchangegroupraw with calls to makestream. Aside from one case of
checking if there are no outgoing commits and returning None, this is pretty
much a drop in replacement.

Differential Revision: https://phab.mercurial-scm.org/D666

mercurial/changegroup.py

@@ -940,17 +940,6 b' def getsubsetraw(repo, outgoing, bundler'
     _changegroupinfo(repo, csets, source)
     return bundler.generate(commonrevs, csets, fastpathlinkrev, source)
 
-def getlocalchangegroupraw(repo, source, outgoing, bundlecaps=None,
-                           version='01'):
-    """Like getbundle, but taking a discovery.outgoing as an argument.
-
-    This is only implemented for local repos and reuses potentially
-    precomputed sets in outgoing. Returns a raw changegroup generator."""
-    if not outgoing.missing:
-        return None
-    bundler = getbundler(version, repo, bundlecaps)
-    return getsubsetraw(repo, outgoing, bundler, source)
-
 def getchangegroup(repo, source, outgoing, bundlecaps=None,
                    version='01'):
     """Like getbundle, but taking a discovery.outgoing as an argument.

mercurial/exchange.py

@@ -755,10 +755,9 b' def _pushb2ctx(pushop, bundler):'
         if not cgversions:
             raise ValueError(_('no common changegroup version'))
         version = max(cgversions)
-    cg = changegroup.getlocalchangegroupraw(pushop.repo, 'push',
-                                            pushop.outgoing,
-                                            version=version)
-    cgpart = bundler.newpart('changegroup', data=cg)
+    cgstream = changegroup.makestream(pushop.repo, pushop.outgoing, version,
+                                      'push')
+    cgpart = bundler.newpart('changegroup', data=cgstream)
     if cgversions:
         cgpart.addparam('version', version)
     if 'treemanifest' in pushop.repo.requirements:
@@ -1621,7 +1620,7 b' def getbundlechunks(repo, source, heads='
 def _getbundlechangegrouppart(bundler, repo, source, bundlecaps=None,
                               b2caps=None, heads=None, common=None, **kwargs):
     """add a changegroup part to the requested bundle"""
-    cg = None
+    cgstream = None
     if kwargs.get('cg', True):
         # build changegroup bundle here.
         version = '01'
@@ -1633,12 +1632,11 b' def _getbundlechangegrouppart(bundler, r'
                 raise ValueError(_('no common changegroup version'))
             version = max(cgversions)
         outgoing = _computeoutgoing(repo, heads, common)
-        cg = changegroup.getlocalchangegroupraw(repo, source, outgoing,
-                                                bundlecaps=bundlecaps,
-                                                version=version)
+        cgstream = changegroup.makestream(repo, outgoing, version, source,
+                                          bundlecaps=bundlecaps)
 
-    if cg:
-        part = bundler.newpart('changegroup', data=cg)
+    if cgstream:
+        part = bundler.newpart('changegroup', data=cgstream)
         if cgversions:
             part.addparam('version', version)
         part.addparam('nbchanges', str(len(outgoing.missing)), mandatory=False)