[PATCH 4/5] perf mem: introduce --list-cmds

[Ramkumar Ramachandra <artagnon@gmail.com>]

Cc: David Ahern <dsahern@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
---
 tools/perf/builtin-mem.c      | 15 ++++++++++-----
 tools/perf/perf-completion.sh |  4 ++--
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 31c00f1..a1db6e7 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -21,11 +21,6 @@ struct perf_mem {
 	DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
 };
 
-static const char * const mem_usage[] = {
-	"perf mem [<options>] {record <command> |report}",
-	NULL
-};
-
 static int __cmd_record(int argc, const char **argv)
 {
 	int rec_argc, i = 0, j;
@@ -191,6 +186,7 @@ static int report_events(int argc, const char **argv, struct perf_mem *mem)
 int cmd_mem(int argc, const char **argv, const char *prefix __maybe_unused)
 {
 	struct stat st;
+	bool list_cmds = false;
 	struct perf_mem mem = {
 		.tool = {
 			.sample		= process_sample_event,
@@ -219,12 +215,21 @@ int cmd_mem(int argc, const char **argv, const char *prefix __maybe_unused)
 		   "separator",
 		   "separator for columns, no spaces will be added"
 		   " between columns '.' is reserved."),
+	OPT_BOOLEAN(0, "list-cmds", &list_cmds,
+		"list commands raw for use by scripts"),
 	OPT_END()
 	};
+	const char *const subcommands[] = { "record", "report", NULL };
+	const char *mem_usage[] = { NULL, NULL };
+	build_usage_string(mem_usage, "mem", subcommands);
 
 	argc = parse_options(argc, argv, mem_options, mem_usage,
 			     PARSE_OPT_STOP_AT_NON_OPTION);
 
+	if (list_cmds) {
+		list_cmds_raw(subcommands);
+		return 0;
+	}
 	if (!argc || !(strncmp(argv[0], "rec", 3) || mem_operation))
 		usage_with_options(mem_usage, mem_options);
 
diff --git a/tools/perf/perf-completion.sh b/tools/perf/perf-completion.sh
index 302de6a..4ecef69 100644
--- a/tools/perf/perf-completion.sh
+++ b/tools/perf/perf-completion.sh
@@ -121,8 +121,8 @@ __perf_main ()
 	elif [[ $prev == "-e" && "${words[1]}" == @(record|stat|top) ]]; then
 		evts=$($cmd list --raw-dump)
 		__perfcomp_colon "$evts" "$cur"
-	# List subcommands for kmem, kvm, lock
-	elif [[ $prev == @(kmem|kvm|lock) ]]; then
+	# List subcommands for kmem, kvm, lock, mem
+	elif [[ $prev == @(kmem|kvm|lock|mem) ]]; then
 		subcmds=$($cmd $prev --list-cmds)
 		__perfcomp_colon "$subcmds" "$cur"
 	# List long option names
-- 
1.8.5.2.227.g53f3478