ll-merge: warn about inability to merge binary files only when we can't

When a path being merged is auto detected to be a binary file, we
warned "Cannot merge binary files" before switching to activate the
binary ll-merge driver.  When we are merging with the -Xours/theirs
option, however, we know what the "clean" merge result is, and the
warning is inappropriate.

In addition, when the path is explicitly marked as a binary file,
this warning was not issued, even though without -Xours/theirs, we
cannot cleanly automerge such a path, which was inconsistent.

Move the warning code from ll_xdl_merge() to ll_binary_merge(), and
issue the message only when we cannot cleanly automerge.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/ll-merge.c b/ll-merge.c
index 8535e2d4a52114bcab275f8240d175bfa9a9fed6..307315b7883db7dbaa8835e1cda72cdd7bdaae93 100644 (file)
--- a/ll-merge.c
+++ b/ll-merge.c
@@ -35,7 +35,7 @@ struct ll_merge_driver {
  */
 static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
                           mmbuffer_t *result,
-                          const char *path_unused,
+                          const char *path,
                           mmfile_t *orig, const char *orig_name,
                           mmfile_t *src1, const char *name1,
                           mmfile_t *src2, const char *name2,
@@ -53,6 +53,9 @@ static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
        } else {
                switch (opts->variant) {
                default:
+                       warning("Cannot merge binary files: %s (%s vs. %s)\n",
+                               path, name1, name2);
+                       /* fallthru */
                case XDL_MERGE_FAVOR_OURS:
                        stolen = src1;
                        break;
@@ -88,8 +91,6 @@ static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
        if (buffer_is_binary(orig->ptr, orig->size) ||
            buffer_is_binary(src1->ptr, src1->size) ||
            buffer_is_binary(src2->ptr, src2->size)) {
-               warning("Cannot merge binary files: %s (%s vs. %s)\n",
-                       path, name1, name2);
                return ll_binary_merge(drv_unused, result,
                                       path,
                                       orig, orig_name,