blame: draft of line format

index 126b8c9e5..89c1a862d 100644
@@ -52,6 +52,7 @@ static int xdl_opts;
 static int abbrev = -1;
 static int no_whole_file_rename;
 static int show_progress;
+static char *format_line;
 
 static struct date_mode blame_date_mode = { DATE_ISO8601 };
 static size_t blame_date_width;

@@ -1931,6 +1932,19 @@ static void emit_porcelain(struct scoreboard *sb, struct blame_entry *ent,
 		putchar('\n');
 }
 
+static void pretty_info(char* revid, struct blame_entry *ent, struct strbuf *rev_buffer)
+{
+	struct pretty_print_context ctx = {0};
+	struct rev_info rev;
+
+	struct strbuf format = STRBUF_INIT;
+	strbuf_addstr(&format, format_line);
+	ctx.fmt = CMIT_FMT_USERFORMAT;
+	get_commit_format(format.buf, &rev);
+	pretty_print_commit(&ctx, ent->suspect->commit, rev_buffer);
+	strbuf_release(&format);
+}
+
 static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt)
 {
 	int cnt;

@@ -1939,11 +1953,15 @@ static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt)
 	struct commit_info ci;
 	char hex[GIT_SHA1_HEXSZ + 1];
 	int show_raw_time = !!(opt & OUTPUT_RAW_TIMESTAMP);
+	struct strbuf line_revision_buf = STRBUF_INIT;
 
 	get_commit_info(suspect->commit, &ci, 1);
 	sha1_to_hex_r(hex, suspect->commit->object.oid.hash);
 
 	cp = nth_line(sb, ent->lno);
+
+	if (format_line)
+		pretty_info(hex, ent, &line_revision_buf);
 	for (cnt = 0; cnt < ent->num_lines; cnt++) {
 		char ch;
 		int length = (opt & OUTPUT_LONG_OBJECT_NAME) ? GIT_SHA1_HEXSZ : abbrev;

@@ -1968,6 +1986,10 @@ static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt)
 			       format_time(ci.author_time, ci.author_tz.buf,
 					   show_raw_time),
 			       ent->lno + 1 + cnt);
+		} else if (format_line) {
+			printf("%s", line_revision_buf.buf);
+			printf(" %*d) ",
+			       max_digits, ent->lno + 1 + cnt);
 		} else {
 			if (opt & OUTPUT_SHOW_SCORE)
 				printf(" %*d %02d",

@@ -2007,6 +2029,7 @@ static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt)
 	if (sb->final_buf_size && cp[-1] != '\n')
 		putchar('\n');
 
+	strbuf_release(&line_revision_buf);
 	commit_info_destroy(&ci);
 }
 

@@ -2605,6 +2628,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 
 		OPT_BIT(0, "minimal", &xdl_opts, N_("Spend extra cycles to find better match"), XDF_NEED_MINIMAL),
 		OPT_STRING('S', NULL, &revs_file, N_("file"), N_("Use revisions from <file> instead of calling git-rev-list")),
+		OPT_STRING(0, "format-line", &format_line, N_("format-line"), N_("Use pretty format for revisions")),
 		OPT_STRING(0, "contents", &contents_from, N_("file"), N_("Use <file>'s contents as the final image")),
 		{ OPTION_CALLBACK, 'C', NULL, &opt, N_("score"), N_("Find line copies within and across files"), PARSE_OPT_OPTARG, blame_copy_callback },
 		{ OPTION_CALLBACK, 'M', NULL, &opt, N_("score"), N_("Find line movements within and across files"), PARSE_OPT_OPTARG, blame_move_callback },