1 files changed, 21 insertions, 12 deletions

diff --git a/builtin/blame.c b/builtin/blame.c
index 67adaef4d8..bfdf7cc132 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -499,7 +499,7 @@ static int read_ancestry(const char *graft_file)
 
 static int update_auto_abbrev(int auto_abbrev, struct blame_origin *suspect)
 {
-	const char *uniq = find_unique_abbrev(suspect->commit->object.oid.hash,
+	const char *uniq = find_unique_abbrev(&suspect->commit->object.oid,
 					      auto_abbrev);
 	int len = strlen(uniq);
 	if (auto_abbrev < len)
@@ -649,6 +649,15 @@ static int blame_move_callback(const struct option *option, const char *arg, int
 	return 0;
 }
 
+static int is_a_rev(const char *name)
+{
+	struct object_id oid;
+
+	if (get_oid(name, &oid))
+		return 0;
+	return OBJ_NONE < oid_object_info(the_repository, &oid, NULL);
+}
+
 int cmd_blame(int argc, const char **argv, const char *prefix)
 {
 	struct rev_info revs;
@@ -708,8 +717,8 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 	git_config(git_blame_config, &output_option);
 	init_revisions(&revs, NULL);
 	revs.date_mode = blame_date_mode;
-	DIFF_OPT_SET(&revs.diffopt, ALLOW_TEXTCONV);
-	DIFF_OPT_SET(&revs.diffopt, FOLLOW_RENAMES);
+	revs.diffopt.flags.allow_textconv = 1;
+	revs.diffopt.flags.follow_renames = 1;
 
 	save_commit_buffer = 0;
 	dashdash_pos = 0;
@@ -720,6 +729,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 	for (;;) {
 		switch (parse_options_step(&ctx, options, blame_opt_usage)) {
 		case PARSE_OPT_HELP:
+		case PARSE_OPT_ERROR:
 			exit(129);
 		case PARSE_OPT_DONE:
 			if (ctx.argv[0])
@@ -734,9 +744,9 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 		parse_revision_opt(&revs, &ctx, options, blame_opt_usage);
 	}
 parse_done:
-	no_whole_file_rename = !DIFF_OPT_TST(&revs.diffopt, FOLLOW_RENAMES);
+	no_whole_file_rename = !revs.diffopt.flags.follow_renames;
 	xdl_opts |= revs.diffopt.xdl_opts & XDF_INDENT_HEURISTIC;
-	DIFF_OPT_CLR(&revs.diffopt, FOLLOW_RENAMES);
+	revs.diffopt.flags.follow_renames = 0;
 	argc = parse_options_end(&ctx);
 
 	if (incremental || (output_option & OUTPUT_PORCELAIN)) {
@@ -803,7 +813,7 @@ parse_done:
 	}
 	blame_date_width -= 1; /* strip the null */
 
-	if (DIFF_OPT_TST(&revs.diffopt, FIND_COPIES_HARDER))
+	if (revs.diffopt.flags.find_copies_harder)
 		opt |= (PICKAXE_BLAME_COPY | PICKAXE_BLAME_MOVE |
 			PICKAXE_BLAME_COPY_HARDER);
 
@@ -845,16 +855,15 @@ parse_done:
 	} else {
 		if (argc < 2)
 			usage_with_options(blame_opt_usage, options);
-		path = add_prefix(prefix, argv[argc - 1]);
-		if (argc == 3 && !file_exists(path)) { /* (2b) */
+		if (argc == 3 && is_a_rev(argv[argc - 1])) { /* (2b) */
 			path = add_prefix(prefix, argv[1]);
 			argv[1] = argv[2];
+		} else {	/* (2a) */
+			if (argc == 2 && is_a_rev(argv[1]) && !get_git_work_tree())
+				die("missing <path> to blame");
+			path = add_prefix(prefix, argv[argc - 1]);
 		}
 		argv[argc - 1] = "--";
-
-		setup_work_tree();
-		if (!file_exists(path))
-			die_errno("cannot stat path '%s'", path);
 	}
 
 	revs.disable_stdin = 1;