Merge branch 'gs/commit-graph-trace-with-cmd' into jch

Dev support.

* gs/commit-graph-trace-with-cmd:
  commit-graph: emit trace2 cmd_mode for each sub-command

Author: gitster

builtin/commit-graph.c

@@ -60,6 +60,8 @@ static int graph_verify(int argc, const char **argv)
 		OPT_END(),
 	};
 
+	trace2_cmd_mode("verify");
+
 	opts.progress = isatty(2);
 	argc = parse_options(argc, argv, NULL,
 			     builtin_commit_graph_verify_options,
@@ -107,6 +109,8 @@ static int graph_read(int argc, const char **argv)
 		OPT_END(),
 	};
 
+	trace2_cmd_mode("read");
+
 	argc = parse_options(argc, argv, NULL,
 			     builtin_commit_graph_read_options,
 			     builtin_commit_graph_read_usage, 0);
@@ -190,6 +194,8 @@ static int graph_write(int argc, const char **argv)
 	split_opts.max_commits = 0;
 	split_opts.expire_time = 0;
 
+	trace2_cmd_mode("write");
+
 	argc = parse_options(argc, argv, NULL,
 			     builtin_commit_graph_write_options,
 			     builtin_commit_graph_write_usage, 0);