merge: use the "octopus" strategy without forking

This teaches `git merge' to invoke the "octopus" strategy with a
function call instead of forking.

Signed-off-by: Alban Gruin <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: agrn

builtin/merge.c

@@ -744,6 +744,9 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
 	} else if (!strcmp(strategy, "resolve"))
 		return merge_strategies_resolve(the_repository, common,
 						head_arg, remoteheads);
+	else if (!strcmp(strategy, "octopus"))
+		return merge_strategies_octopus(the_repository, common,
+						head_arg, remoteheads);
 	else {
 		return try_merge_command(the_repository,
 					 strategy, xopts_nr, xopts,