# HG changeset patch
# User FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
# Date 1397576244 -32400
# Node ID 6c383c871fdb247d705f613f98def01ccdb94ea0
# Parent  32b3331f18ebdeb1b95eebf5b5c767deadca2535
localrepo: introduce "prepushoutgoinghooks" to extend outgoing check easily

This patch introduces "prepushoutgoinghooks" to extend outgoing check
before pushing changesets to remote easily.

This chooses the function returning "util.hooks" instead of the one to
be overridden.

The latter may cause problems silently, if one of overriders forgets
(or fails) to execute a kind of "super(xxx, self).overridden(...)". In
the other hand, the former can ensure that all registered functions
are invoked, unless one of them raises an exception.

diff -r 32b3331f18eb -r 6c383c871fdb mercurial/exchange.py
--- a/mercurial/exchange.py	Wed Apr 16 00:37:24 2014 +0900
+++ b/mercurial/exchange.py	Wed Apr 16 00:37:24 2014 +0900
@@ -103,6 +103,9 @@
         try:
             _pushdiscovery(pushop)
             if _pushcheckoutgoing(pushop):
+                pushop.repo.prepushoutgoinghooks(pushop.repo,
+                                                 pushop.remote,
+                                                 pushop.outgoing)
                 _pushchangeset(pushop)
             _pushcomputecommonheads(pushop)
             _pushsyncphase(pushop)
diff -r 32b3331f18eb -r 6c383c871fdb mercurial/localrepo.py
--- a/mercurial/localrepo.py	Wed Apr 16 00:37:24 2014 +0900
+++ b/mercurial/localrepo.py	Wed Apr 16 00:37:24 2014 +0900
@@ -1696,6 +1696,13 @@
         """
         pass
 
+    @unfilteredpropertycache
+    def prepushoutgoinghooks(self):
+        """Return util.hooks consists of "(repo, remote, outgoing)"
+        functions, which are called before pushing changesets.
+        """
+        return util.hooks()
+
     def push(self, remote, force=False, revs=None, newbranch=False):
         return exchange.push(self, remote, force, revs, newbranch)