remote-hg: pass around revision refs

So that when a diverge is detected, we know which ref to report an error
for.

Also, since we are not throwing an exception, return a proper error
code.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/remote-helpers/git-remote-hg

@@ -857,18 +857,19 @@ def write_tag(repo, tag, node, msg, author):
 
     encoding.encoding = tmp
 
-    return tagnode
+    return (tagnode, branch)
 
 def checkheads(repo, remote, p_revs):
 
     remotemap = remote.branchmap()
     if not remotemap:
         # empty repo
-        return
+        return True
 
     new = {}
+    ret = True
 
-    for node in p_revs:
+    for node, ref in p_revs.iteritems():
         ctx = repo[node]
         branch = ctx.branch()
         if not branch in remotemap:
@@ -893,7 +894,11 @@ def checkheads(repo, remote, p_revs):
             if found:
                 continue
 
-            raise Exception("non-fast-forward")
+            node = repo.changelog.node(rev)
+            print "error %s non-fast forward" % p_revs[node]
+            ret = False
+
+    return ret
 
 def push_unsafe(repo, remote, parsed_refs, p_revs):
 
@@ -903,8 +908,8 @@ def push_unsafe(repo, remote, parsed_refs, p_revs):
     commoninc = fci(repo, remote, force=force)
     common, _, remoteheads = commoninc
 
-    if not force:
-        checkheads(repo, remote, p_revs)
+    if not force and not checkheads(repo, remote, p_revs):
+        return None
 
     cg = repo.getbundle('push', heads=list(p_revs), common=common)
 
@@ -940,7 +945,7 @@ def do_export(parser):
     global parsed_refs, bmarks, peer
 
     p_bmarks = []
-    p_revs = set()
+    p_revs = {}
 
     parser.next()
 
@@ -965,7 +970,7 @@ def do_export(parser):
             if branch in branches and bnode in branches[branch]:
                 # up to date
                 continue
-            p_revs.add(bnode)
+            p_revs[bnode] = ref
             print "ok %s" % ref
         elif ref.startswith('refs/heads/'):
             bmark = ref[len('refs/heads/'):]
@@ -980,7 +985,7 @@ def do_export(parser):
                     not (bmark == 'master' and bmark not in parser.repo._bookmarks):
                 p_bmarks.append((ref, bmark, old, new))
 
-            p_revs.add(bnode)
+            p_revs[bnode] = ref
         elif ref.startswith('refs/tags/'):
             tag = ref[len('refs/tags/'):]
             tag = hgref(tag)
@@ -988,20 +993,23 @@ def do_export(parser):
             if mode == 'git':
                 if not msg:
                     msg = 'Added tag %s for changeset %s' % (tag, node[:12]);
-                tagnode = write_tag(parser.repo, tag, node, msg, author)
-                p_revs.add(tagnode)
+                tagnode, branch = write_tag(parser.repo, tag, node, msg, author)
+                p_revs[tagnode] = 'refs/heads/branches/' + gitref(branch)
             else:
                 fp = parser.repo.opener('localtags', 'a')
                 fp.write('%s %s\n' % (node, tag))
                 fp.close()
-            p_revs.add(bnode)
+            p_revs[bnode] = ref
             print "ok %s" % ref
         else:
             # transport-helper/fast-export bugs
             continue
 
     if peer:
-        push(parser.repo, peer, parsed_refs, p_revs)
+        if not push(parser.repo, peer, parsed_refs, p_revs):
+            # do not update bookmarks
+            print
+            return
 
         # update remote bookmarks
         remote_bmarks = peer.listkeys('bookmarks')

contrib/remote-helpers/test-hg.sh

@@ -328,7 +328,7 @@ test_expect_success 'remote new bookmark' '
 	check_bookmark hgrepo feature-b feature-b
 '
 
-test_expect_failure 'remote push diverged' '
+test_expect_success 'remote push diverged' '
 	test_when_finished "rm -rf gitrepo*" &&
 
 	git clone "hg::hgrepo" gitrepo &&
@@ -351,7 +351,7 @@ test_expect_failure 'remote push diverged' '
 	check_branch hgrepo default bump
 '
 
-test_expect_failure 'remote update bookmark diverge' '
+test_expect_success 'remote update bookmark diverge' '
 	test_when_finished "rm -rf gitrepo*" &&
 
 	(
@@ -398,7 +398,7 @@ test_expect_failure 'remote new bookmark multiple branch head' '
 # cleanup previous stuff
 rm -rf hgrepo
 
-test_expect_failure 'remote big push' '
+test_expect_success 'remote big push' '
 	test_when_finished "rm -rf hgrepo gitrepo*" &&
 
 	(