--- a/mercurial/filemerge.py	Wed Aug 12 08:53:01 2015 -0400
+++ b/mercurial/filemerge.py	Thu Sep 10 09:41:11 2015 -0400
@@ -286,6 +286,38 @@
         labels.append('base')
     return _imerge(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels)
 
+def _imergeauto(repo, mynode, orig, fcd, fco, fca, toolconf, files,
+                labels=None, localorother=None):
+    """
+    Generic driver for _imergelocal and _imergeother
+    """
+    assert localorother is not None
+    tool, toolpath, binary, symlink = toolconf
+    if symlink:
+        repo.ui.warn(_('warning: :merge-%s cannot merge symlinks '
+                       'for %s\n') % (localorother, fcd.path()))
+        return False, 1
+    a, b, c, back = files
+    r = simplemerge.simplemerge(repo.ui, a, b, c, label=labels,
+                                localorother=localorother)
+    return True, r
+
+@internaltool('merge-local', True)
+def _imergelocal(*args, **kwargs):
+    """
+    Like :merge, but resolve all conflicts non-interactively in favor
+    of the local changes."""
+    success, status = _imergeauto(localorother='local', *args, **kwargs)
+    return success, status
+
+@internaltool('merge-other', True)
+def _imergeother(*args, **kwargs):
+    """
+    Like :merge, but resolve all conflicts non-interactively in favor
+    of the other changes."""
+    success, status = _imergeauto(localorother='other', *args, **kwargs)
+    return success, status
+
 @internaltool('tagmerge', True,
               _("automatic tag merging of %s failed! "
                 "(use 'hg resolve --tool :merge' or another merge "

--- a/tests/test-conflict.t	Wed Aug 12 08:53:01 2015 -0400
+++ b/tests/test-conflict.t	Thu Sep 10 09:41:11 2015 -0400
@@ -232,3 +232,65 @@
   5
   >>>>>>> other
   Hop we are done.
+
+Add some unconflicting changes on each head, to make sure we really
+are merging, unlike :local and :other
+
+  $ hg up -C
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ printf "\n\nEnd of file\n" >> a
+  $ hg ci -m "Add some stuff at the end"
+  $ hg up -r 1
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ printf "Start of file\n\n\n" > tmp
+  $ cat a >> tmp
+  $ mv tmp a
+  $ hg ci -m "Add some stuff at the beginning"
+
+Now test :merge-other and :merge-local
+
+  $ hg merge
+  merging a
+  warning: conflicts during merge.
+  merging a incomplete! (edit conflicts, then use 'hg resolve --mark')
+  1 files updated, 0 files merged, 0 files removed, 1 files unresolved
+  use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
+  [1]
+  $ hg resolve --tool :merge-other a
+  merging a
+  (no more unresolved files)
+  $ cat a
+  Start of file
+  
+  
+  Small Mathematical Series.
+  1
+  2
+  3
+  6
+  8
+  Hop we are done.
+  
+  
+  End of file
+
+  $ hg up -C
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ hg merge --tool :merge-local
+  merging a
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  (branch merge, don't forget to commit)
+  $ cat a
+  Start of file
+  
+  
+  Small Mathematical Series.
+  1
+  2
+  3
+  4
+  5
+  Hop we are done.
+  
+  
+  End of file

--- a/tests/test-help.t	Wed Aug 12 08:53:01 2015 -0400
+++ b/tests/test-help.t	Thu Sep 10 09:41:11 2015 -0400
@@ -1220,6 +1220,14 @@
         partially merged file. Markers will have two sections, one for each side
         of merge.
   
+      ":merge-local"
+        Like :merge, but resolve all conflicts non-interactively in favor of the
+        local changes.
+  
+      ":merge-other"
+        Like :merge, but resolve all conflicts non-interactively in favor of the
+        other changes.
+  
       ":merge3"
         Uses the internal non-interactive simple merge algorithm for merging
         files. It will fail if there are any conflicts and leave markers in the