outgoing: introduce "outgoinghooks" to avoid redundant outgoing check

This patch introduces "outgoinghooks" to avoid redundant outgoing
check for "hg outgoing" in other than "commands.outgoing" (or utility
functions used by it).

mercurial/cmdutil.py

@@ -2379,6 +2379,11 b' def command(table):'
 
     return cmd
 
+# a list of (ui, repo, otherpeer, opts, missing) functions called by
+# commands.outgoing.  "missing" is "missing" of the result of
+# "findcommonoutgoing()"
+outgoinghooks = util.hooks()
+
 # a list of (ui, repo) functions called by commands.summary
 summaryhooks = util.hooks()
 

mercurial/commands.py

@@ -4355,6 +4355,7 b' def outgoing(ui, repo, dest=None, **opts'
         cmdutil.checkunsupportedgraphflags([], opts)
         o, other = hg._outgoing(ui, repo, dest, opts)
         if not o:
+            cmdutil.outgoinghooks(ui, repo, other, opts, o)
             return
 
         revdag = cmdutil.graphrevs(repo, o, opts)
@@ -4362,6 +4363,7 b' def outgoing(ui, repo, dest=None, **opts'
         showparents = [ctx.node() for ctx in repo[None].parents()]
         cmdutil.displaygraph(ui, revdag, displayer, showparents,
                              graphmod.asciiedges)
+        cmdutil.outgoinghooks(ui, repo, other, opts, o)
         return 0
 
     if opts.get('bookmarks'):

mercurial/hg.py

@@ -600,6 +600,7 b' def outgoing(ui, repo, dest, opts):'
     limit = cmdutil.loglimit(opts)
     o, other = _outgoing(ui, repo, dest, opts)
     if not o:
+        cmdutil.outgoinghooks(ui, repo, other, opts, o)
         return recurse()
 
     if opts.get('newest_first'):
@@ -615,6 +616,7 b' def outgoing(ui, repo, dest, opts):'
         count += 1
         displayer.show(repo[n])
     displayer.close()
+    cmdutil.outgoinghooks(ui, repo, other, opts, o)
     recurse()
     return 0 # exit code is zero since we found outgoing changes