udev/scsi_id: convert to VERB_COMMAND and add --introspect-cli

The custom help() is replaced by a COMMAND() description, and
--introspect-cli is added. The abstract is changed to the imperative.
There is no man page for this udev helper, so none is referenced.

src/udev/scsi_id/scsi_id.c

@@ -8,16 +8,15 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#include "sd-json.h"
+
 #include "alloc-util.h"
 #include "build.h"
 #include "device-nodes.h"
 #include "extract-word.h"
 #include "fd-util.h"
 #include "fileio.h"
-#include "format-table.h"
-#include "help-util.h"
 #include "main-func.h"
-#include "options.h"
 #include "parse-util.h"
 #include "scsi_id.h"
 #include "string-util.h"
@@ -25,6 +24,7 @@
 #include "strxcpyx.h"
 #include "udev-util.h"
 #include "utf8.h"
+#include "verbs.h"
 
 static bool all_good = false;
 static bool dev_specified = false;
@@ -40,6 +40,12 @@ static char model_enc_str[256];
 static char revision_str[16];
 static char type_str[16];
 
+COMMAND(
+        "scsi_id\0",
+        "Identify SCSI devices.",
+        .argspec = "[DEVICE]\0",
+);
+
 static void set_type(unsigned type_num, char *to, size_t len) {
         const char *type;
 
@@ -206,21 +212,6 @@ static int parse_page_code(const char *value, enum page_code *ret) {
         return 0;
 }
 
-static int help(void) {
-        _cleanup_(table_unrefp) Table *options = NULL;
-        int r;
-
-        r = option_parser_get_help_table(&options);
-        if (r < 0)
-                return r;
-
-        help_cmdline("[OPTION...] DEVICE");
-        help_abstract("SCSI device identification.");
-        help_section("Options");
-
-        return table_print_or_warn(options);
-}
-
 static int set_options(int argc, char **argv, char *maj_min_dev) {
         assert(argc >= 0);
         assert(argv);
@@ -232,7 +223,7 @@ static int set_options(int argc, char **argv, char *maj_min_dev) {
                 switch (c) {
 
                 OPTION_COMMON_HELP:
-                        return help();
+                        return command_print_help("scsi_id");
 
                 OPTION_COMMON_VERSION_WITH_HIDDEN_V:
                         return version();
@@ -284,6 +275,9 @@ static int set_options(int argc, char **argv, char *maj_min_dev) {
                 OPTION('x', "export", NULL, "Print values as environment keys"):
                         export = true;
                         break;
+
+                OPTION_COMMON_INTROSPECT_CLI:
+                        return introspect_cli(SD_JSON_FORMAT_OFF);
                 }
 
         char **args = option_parser_get_args(&opts);

test/units/TEST-74-AUX-UTILS.introspect-cli.sh

@@ -32,6 +32,7 @@ INTROSPECTABLE=(
     portablectl
     resolvectl
     run0
+    scsi_id
     storagectl
     systemd-ac-power
     systemd-analyze