outgoing: merge the code handling --graph with the main one

The --graph code had its own copy of the logic. With the previous reorganisation
of the code, we can now merge it with the main code, reducing fragile
complication.

As a side effect, `hg out --graph` now use the right return code when they are
nothing outgoing. This explain the change to output in
`tests/test-largefiles-misc.t`.

Differential Revision: https://phab.mercurial-scm.org/D10383

mercurial/commands.py

@@ -4972,22 +4972,6 b' def outgoing(ui, repo, dest=None, **opts'
         )
 
     opts = pycompat.byteskwargs(opts)
-    if opts.get(b'graph'):
-        logcmdutil.checkunsupportedgraphflags([], opts)
-        o, other = hg._outgoing(ui, repo, dest, opts)
-        if not o:
-            cmdutil.outgoinghooks(ui, repo, other, opts, o)
-            return
-
-        revdag = logcmdutil.graphrevs(repo, o, opts)
-        ui.pager(b'outgoing')
-        displayer = logcmdutil.changesetdisplayer(ui, repo, opts, buffered=True)
-        logcmdutil.displaygraph(
-            ui, repo, revdag, displayer, graphmod.asciiedges
-        )
-        cmdutil.outgoinghooks(ui, repo, other, opts, o)
-        return 0
-
     if opts.get(b'bookmarks'):
         dest = path.pushloc or path.loc
         other = hg.peer(repo, opts, dest)

mercurial/hg.py

@@ -32,6 +32,7 b' from . import ('
     error,
     exchange,
     extensions,
+    graphmod,
     httppeer,
     localrepo,
     lock,
@@ -1382,13 +1383,24 b' def _outgoing_filter(repo, revs, opts):'
 
 
 def outgoing(ui, repo, dest, opts):
-
+    if opts.get(b'graph'):
+        logcmdutil.checkunsupportedgraphflags([], opts)
     o, other = _outgoing(ui, repo, dest, opts)
     ret = 1
     try:
         if o:
             ret = 0
 
+            if opts.get(b'graph'):
+                revdag = logcmdutil.graphrevs(repo, o, opts)
+                ui.pager(b'outgoing')
+                displayer = logcmdutil.changesetdisplayer(
+                    ui, repo, opts, buffered=True
+                )
+                logcmdutil.displaygraph(
+                    ui, repo, revdag, displayer, graphmod.asciiedges
+                )
+            else:
             ui.pager(b'outgoing')
             displayer = logcmdutil.changesetdisplayer(ui, repo, opts)
             for n in _outgoing_filter(repo, o, opts):

tests/test-largefiles-misc.t

@@ -675,6 +675,7 b' check messages when there is no files to'
   searching for changes
   no changes found
   largefiles: no files to upload
+  [1]
 
 check messages when there are files to upload: