From: Junio C Hamano <junkio@cox.net>
Date: Wed, 18 Apr 2007 08:47:21 +0000 (-0700)
Subject: Allow the default low-level merge driver to be configured.
X-Git-Tag: v1.5.2-rc0~18^2~12
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=be89cb239e8ec02e23015675cc8b2d60992a6cfc;p=git.git

Allow the default low-level merge driver to be configured.

When no 'merge' attribute is given to a path, merge-recursive
uses the built-in xdl-merge as the low-level merge driver.

A new configuration item 'merge.default' can name a low-level
merge driver of user's choice to be used instead.

Signed-off-by: Junio C Hamano <junkio@cox.net>
---

diff --git a/merge-recursive.c b/merge-recursive.c
index 8ec18ad57..598300097 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -839,12 +839,18 @@ static struct user_merge_fn {
 	char *cmdline;
 	char b_[1];
 } *ll_user_merge_fns, **ll_user_merge_fns_tail;
+static const char *default_ll_merge;
 
 static int read_merge_config(const char *var, const char *value)
 {
 	struct user_merge_fn *fn;
 	int blen, nlen;
 
+	if (!strcmp(var, "merge.default")) {
+		default_ll_merge = strdup(value);
+		return 0;
+	}
+
 	if (strcmp(var, "merge.driver"))
 		return 0;
 	if (!value)
@@ -900,8 +906,12 @@ static ll_merge_fn find_ll_merge_fn(void *merge_attr, const char **cmdline)
 		return ll_xdl_merge;
 	else if (ATTR_FALSE(merge_attr))
 		return ll_binary_merge;
-	else if (ATTR_UNSET(merge_attr))
-		return ll_xdl_merge;
+	else if (ATTR_UNSET(merge_attr)) {
+		if (!default_ll_merge)
+			return ll_xdl_merge;
+		else
+			name = default_ll_merge;
+	}
 	else
 		name = merge_attr;