describe: when failing, tell the user about options that work

diff --git a/merge-tree.c b/merge-tree.c
index 8be0b9f910b7c2fa9506ffe5fb31bd4632eaa1a1..f01e7c81aebea84b95154c9076af66979e52715f 100644 (file)
--- a/merge-tree.c
+++ b/merge-tree.c
@@ -2,8 +2,9 @@
 #include "tree-walk.h"
 #include "xdiff-interface.h"
 #include "blob.h"
+#include "exec_cmd.h"
 
-static const char merge_tree_usage[] = "git-merge-tree <base-tree> <branch1> <branch2>";
+static const char merge_tree_usage[] = "git merge-tree <base-tree> <branch1> <branch2>";
 static int resolve_directories = 1;
 
 struct merge_list {
@@ -158,9 +159,8 @@ static int same_entry(struct name_entry *a, struct name_entry *b)
 
 static struct merge_list *create_entry(unsigned stage, unsigned mode, const unsigned char *sha1, const char *path)
 {
-       struct merge_list *res = xmalloc(sizeof(*res));
+       struct merge_list *res = xcalloc(1, sizeof(*res));
 
-       memset(res, 0, sizeof(*res));
        res->stage = stage;
        res->path = path;
        res->mode = mode;
@@ -287,7 +287,7 @@ static void unresolved(const struct traverse_info *info, struct name_entry n[3])
  * The successful merge rules are the same as for the three-way merge
  * in git-read-tree.
  */
-static int threeway_callback(int n, unsigned long mask, struct name_entry *entry, struct traverse_info *info)
+static int threeway_callback(int n, unsigned long mask, unsigned long dirmask, struct name_entry *entry, struct traverse_info *info)
 {
        /* Same in both? */
        if (same_entry(entry+1, entry+2)) {
@@ -345,6 +345,8 @@ int main(int argc, char **argv)
        if (argc != 4)
                usage(merge_tree_usage);
 
+       git_extract_argv0_path(argv[0]);
+
        setup_git_directory();
 
        buf1 = get_tree_descriptor(t+0, argv[1]);