[PATCH 4 of 6] changegroup: expose list of changesets from getlocalchangegroup

[Gregory Szorc]

# HG changeset patch
# User Gregory Szorc <gregory.szorc at gmail.com>
# Date 1432590935 25200
#      Mon May 25 14:55:35 2015 -0700
# Node ID c152c1659c8f4afa36a34437f4b7a06e41cdb77f
# Parent  40916b298b6a2106814992935565f61a6d3a7e2c
changegroup: expose list of changesets from getlocalchangegroup

This isn't needed for the overall series. However, making this change
ensures API parity with getlocalchangegroupraw, which seems like a good
idea.

diff --git a/mercurial/changegroup.py b/mercurial/changegroup.py
--- a/mercurial/changegroup.py
+++ b/mercurial/changegroup.py
@@ -616,13 +616,17 @@ def getlocalchangegroupraw(repo, source,
 def getlocalchangegroup(repo, source, outgoing, bundlecaps=None):
     """Like getbundle, but taking a discovery.outgoing as an argument.
 
     This is only implemented for local repos and reuses potentially
-    precomputed sets in outgoing."""
+    precomputed sets in outgoing.
+
+    Returns a list of binary changeset nodes and a raw changegroup iterator.
+    Both values may be None if there are no missing changesets.
+    """
     if not outgoing.missing:
-        return None
+        return None, None
     bundler = cg1packer(repo, bundlecaps)
-    return getsubset(repo, outgoing, bundler, source)[1]
+    return getsubset(repo, outgoing, bundler, source)
 
 def _computeoutgoing(repo, heads, common):
     """Computes which revs are outgoing given a set of common
     and a set of heads.
@@ -667,9 +671,9 @@ def getchangegroup(repo, source, heads=N
     The nodes in common might not all be known locally due to the way the
     current discovery protocol works.
     """
     outgoing = _computeoutgoing(repo, heads, common)
-    return getlocalchangegroup(repo, source, outgoing, bundlecaps=bundlecaps)
+    return getlocalchangegroup(repo, source, outgoing, bundlecaps=bundlecaps)[1]
 
 def changegroup(repo, basenodes, source):
     # to avoid a race we use changegroupsubset() (issue1320)
     return changegroupsubset(repo, basenodes, repo.heads(), source)
diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -1248,9 +1248,9 @@ def bundle(ui, repo, fname, dest=None, *
                                                 onlyheads=heads,
                                                 force=opts.get('force'),
                                                 portable=True)
         cg = changegroup.getlocalchangegroup(repo, 'bundle', outgoing,
-                                             bundlecaps)
+                                             bundlecaps)[1]
     if not cg:
         scmutil.nochangesfound(ui, repo, outgoing and outgoing.excluded)
         return 1
 
diff --git a/mercurial/exchange.py b/mercurial/exchange.py
--- a/mercurial/exchange.py
+++ b/mercurial/exchange.py
@@ -646,10 +646,10 @@ def _pushchangeset(pushop):
                                    bundler,
                                    'push',
                                    fastpath=True)[1]
     else:
-        cg = changegroup.getlocalchangegroup(pushop.repo, 'push', outgoing,
-                                        bundlecaps)
+        cg = changegroup.getlocalchangegroup(pushop.repo, 'push',
+                                             outgoing, bundlecaps)[1]
 
     # apply changegroup to remote
     if unbundle:
         # local repo finds heads on server, finds out what
diff --git a/tests/test-bundle2-format.t b/tests/test-bundle2-format.t
--- a/tests/test-bundle2-format.t
+++ b/tests/test-bundle2-format.t
@@ -107,9 +107,9 @@ Create an extension to test bundle2 API
   >             bundled = repo.revs('%ld::%ld', revs, revs)
   >             headmissing = [c.node() for c in repo.set('heads(%ld)', revs)]
   >             headcommon  = [c.node() for c in repo.set('parents(%ld) - %ld', revs, revs)]
   >             outgoing = discovery.outgoing(repo.changelog, headcommon, headmissing)
-  >             cg = changegroup.getlocalchangegroup(repo, 'test:bundle2', outgoing, None)
+  >             cg = changegroup.getlocalchangegroup(repo, 'test:bundle2', outgoing, None)[1]
   >             bundler.newpart('changegroup', data=cg.getchunks(),
   >                             mandatory=False)
   > 
   >     if opts['parts']: