growfs: convert to VERB_COMMAND and add --introspect-cli

The custom help() is replaced by a COMMAND() description, and
--introspect-cli is added. The positional argument is spelled MOUNTPOINT
in the synopsis, like the other metavars, instead of /path/to/mountpoint.
The man page is adjusted to match.

man/systemd-makefs@.service.xml

@@ -30,8 +30,8 @@
     <para><filename>systemd-mkswap@<replaceable>device</replaceable>.service</filename></para>
     <para><filename>systemd-growfs@<replaceable>mountpoint</replaceable>.service</filename></para>
     <para><filename>systemd-growfs-root.service</filename></para>
-    <para><filename>/usr/lib/systemd/systemd-makefs</filename></para>
-    <para><filename>/usr/lib/systemd/systemd-growfs</filename></para>
+    <para><filename>/usr/lib/systemd/systemd-makefs</filename> <replaceable>FSTYPE</replaceable> <replaceable>DEVICE</replaceable></para>
+    <para><filename>/usr/lib/systemd/systemd-growfs</filename> <replaceable>MOUNTPOINT</replaceable></para>
   </refsynopsisdiv>
 
   <refsect1>

src/growfs/growfs.c

@@ -3,6 +3,8 @@
 #include <fcntl.h>
 #include <sys/vfs.h>
 
+#include "sd-json.h"
+
 #include "alloc-util.h"
 #include "blockdev-util.h"
 #include "btrfs-util.h"
@@ -13,19 +15,24 @@
 #include "dissect-image.h"
 #include "dlopen-note.h"
 #include "fd-util.h"
-#include "format-table.h"
 #include "format-util.h"
 #include "log.h"
 #include "main-func.h"
 #include "mountpoint-util.h"
-#include "options.h"
-#include "pretty-print.h"
 #include "resize-fs.h"
 #include "string-util.h"
+#include "verbs.h"
 
 static const char *arg_target = NULL;
 static bool arg_dry_run = false;
 
+COMMAND(
+        "systemd-growfs\0",
+        "Grow filesystem or encrypted payload to device size.",
+        .argspec = "MOUNTPOINT\0",
+        .man_pages = "systemd-growfs@.service.8\0",
+);
+
 #if HAVE_LIBCRYPTSETUP
 static int resize_crypt_luks_device(dev_t devno, const char *fstype, dev_t main_devno) {
         _cleanup_free_ char *devpath = NULL, *main_devpath = NULL;
@@ -128,35 +135,6 @@ static int maybe_resize_underlying_device(
         return 0;
 }
 
-static int help(void) {
-        _cleanup_free_ char *link = NULL;
-        _cleanup_(table_unrefp) Table *options = NULL;
-        int r;
-
-        r = terminal_urlify_man("systemd-growfs@.service", "8", &link);
-        if (r < 0)
-                return log_oom();
-
-        r = option_parser_get_help_table(&options);
-        if (r < 0)
-                return r;
-
-        printf("%s [OPTIONS...] /path/to/mountpoint\n\n"
-               "Grow filesystem or encrypted payload to device size.\n",
-               program_invocation_short_name);
-
-        printf("\n%sOptions:%s\n",
-               ansi_underline(),
-               ansi_normal());
-
-        r = table_print_or_warn(options);
-        if (r < 0)
-                return r;
-
-        printf("\nSee the %s for details.\n", link);
-        return 0;
-}
-
 static int parse_argv(int argc, char *argv[]) {
         assert(argc >= 0);
         assert(argv);
@@ -167,7 +145,7 @@ static int parse_argv(int argc, char *argv[]) {
                 switch (c) {
 
                 OPTION_COMMON_HELP:
-                        return help();
+                        return command_print_help("systemd-growfs");
 
                 OPTION_COMMON_VERSION:
                         return version();
@@ -175,6 +153,9 @@ static int parse_argv(int argc, char *argv[]) {
                 OPTION('n', "dry-run", NULL, "Just print what would be done"):
                         arg_dry_run = true;
                         break;
+
+                OPTION_COMMON_INTROSPECT_CLI:
+                        return introspect_cli(SD_JSON_FORMAT_OFF);
                 }
 
         if (option_parser_get_n_args(&opts) != 1)

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

@@ -30,6 +30,7 @@ INTROSPECTABLE=(
     systemd-dissect
     systemd-escape
     systemd-firstboot
+    systemd-growfs
     systemd-hwdb
     systemd-id128
     systemd-imds