summary: use the new APIs

Summary can perform some incoming/outgoing queries (that should be common to the
other command with the same needs, but that is another story).

We now use the new APIs to do so. The current code behavior is a bit fishy,
relying to the fact "default" will be picked as the destination in last resort.
I did not altered that, but left various comment to highlight the issue.

Differential Revision: https://phab.mercurial-scm.org/D10420

mercurial/commands.py

@@ -7210,7 +7210,12 b' def summary(ui, repo, **opts):'
             return
 
     def getincoming():
-        source, branches = urlutil.parseurl(ui.expandpath(b'default'))
+        # XXX We should actually skip this if no default is specified, instead
+        # of passing "default" which will resolve as "./default/" if no default
+        # path is defined.
+        source, branches = urlutil.get_unique_pull_path(
+            b'summary', repo, ui, b'default'
+        )
         sbranch = branches[0]
         try:
             other = hg.peer(repo, {}, source)
@@ -7233,11 +7238,22 b' def summary(ui, repo, **opts):'
         source = sbranch = sother = commoninc = incoming = None
 
     def getoutgoing():
-        dest, branches = urlutil.parseurl(
-            ui.expandpath(b'default-push', b'default')
-        )
-        dbranch = branches[0]
-        revs, checkout = hg.addbranchrevs(repo, repo, branches, None)
+        # XXX We should actually skip this if no default is specified, instead
+        # of passing "default" which will resolve as "./default/" if no default
+        # path is defined.
+        d = None
+        if b'default-push' in ui.paths:
+            d = b'default-push'
+        elif b'default' in ui.paths:
+            d = b'default'
+        if d is not None:
+            path = urlutil.get_unique_push_path(b'summary', repo, ui, d)
+            dest = path.pushloc or path.loc
+            dbranch = path.branch
+        else:
+            dest = b'default'
+            dbranch = None
+        revs, checkout = hg.addbranchrevs(repo, repo, (dbranch, []), None)
         if source != dest:
             try:
                 dother = hg.peer(repo, {}, dest)