[PATCH 2/7] merge-tree: fix merge.conflictstyle handling

[Felipe Contreras <felipe.contreras@gmail.com>]

Currently it's completely ignored.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
---
 builtin/merge-tree.c               |  4 ++++
 t/t6440-config-conflict-markers.sh | 21 +++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/builtin/merge-tree.c b/builtin/merge-tree.c
index de8520778d..7d677bd75c 100644
--- a/builtin/merge-tree.c
+++ b/builtin/merge-tree.c
@@ -7,6 +7,8 @@
 #include "blob.h"
 #include "exec-cmd.h"
 #include "merge-blobs.h"
+#include "config.h"
+#include "xdiff-interface.h"
 
 static const char merge_tree_usage[] = "git merge-tree <base-tree> <branch1> <branch2>";
 
@@ -378,6 +380,8 @@ int cmd_merge_tree(int argc, const char **argv, const char *prefix)
 	if (argc != 4)
 		usage(merge_tree_usage);
 
+	git_config(git_xmerge_config, NULL);
+
 	buf1 = get_tree_descriptor(r, t+0, argv[1]);
 	buf2 = get_tree_descriptor(r, t+1, argv[2]);
 	buf3 = get_tree_descriptor(r, t+2, argv[3]);
diff --git a/t/t6440-config-conflict-markers.sh b/t/t6440-config-conflict-markers.sh
index 6952552c58..978f4e3e70 100755
--- a/t/t6440-config-conflict-markers.sh
+++ b/t/t6440-config-conflict-markers.sh
@@ -41,4 +41,25 @@ test_expect_success 'merge' '
 	)
 '
 
+test_expect_success 'merge-tree' '
+	test_create_repo merge-tree &&
+	(
+		cd merge-tree &&
+
+		test_commit initial initial-file initial &&
+		test_commit r content r &&
+		git reset --hard initial &&
+		test_commit l content l &&
+
+		git merge-tree initial r l >actual &&
+		! grep -E "\|+" actual &&
+
+		git -c merge.conflictstyle=diff3 merge-tree initial r l >actual &&
+		grep -E "\|+" actual &&
+
+		git -c merge.conflictstyle=merge merge-tree initial r l >actual &&
+		! grep -E "\|+" actual
+	)
+'
+
 test_done
-- 
2.32.0.2.g41be0a4e50