init_buffer(): Kill buf pointer

diff --git a/builtin-diff-index.c b/builtin-diff-index.c
index 1958580d82e54ab5a5b1e054263eab7264c4bcb2..d90eba95a6be17bd0486e0311c2657b1f69ab7d9 100644 (file)
--- a/builtin-diff-index.c
+++ b/builtin-diff-index.c
@@ -9,14 +9,15 @@ static const char diff_cache_usage[] =
 "[<common diff options>] <tree-ish> [<path>...]"
 COMMON_DIFF_OPTIONS_HELP;
 
-int cmd_diff_index(int argc, const char **argv, char **envp)
+int cmd_diff_index(int argc, const char **argv, const char *prefix)
 {
        struct rev_info rev;
        int cached = 0;
        int i;
+       int result;
 
-       git_config(git_diff_config);
-       init_revisions(&rev);
+       init_revisions(&rev, prefix);
+       git_config(git_default_config); /* no "diff" UI options */
        rev.abbrev = 0;
 
        argc = setup_revisions(argc, argv, &rev, NULL);
@@ -28,12 +29,20 @@ int cmd_diff_index(int argc, const char **argv, char **envp)
                else
                        usage(diff_cache_usage);
        }
+       if (!rev.diffopt.output_format)
+               rev.diffopt.output_format = DIFF_FORMAT_RAW;
+
        /*
         * Make sure there is one revision (i.e. pending object),
         * and there is no revision filtering parameters.
         */
-       if (!rev.pending_objects || rev.pending_objects->next ||
+       if (rev.pending.nr != 1 ||
            rev.max_count != -1 || rev.min_age != -1 || rev.max_age != -1)
                usage(diff_cache_usage);
-       return run_diff_index(&rev, cached);
+       if (read_cache() < 0) {
+               perror("read_cache");
+               return -1;
+       }
+       result = run_diff_index(&rev, cached);
+       return rev.diffopt.exit_with_status ? rev.diffopt.has_changes: result;
 }