shared/options: add OPTION_COMMON_LOWERCASE_J

src/id128/id128.c

@@ -259,8 +259,7 @@ static int parse_argv(int argc, char *argv[], char ***ret_args) {
                                 return r;
                         break;
 
-                OPTION_SHORT('j', NULL,
-                             "Equivalent to --json=pretty (on TTY) or --json=short (otherwise)"):
+                OPTION_COMMON_LOWERCASE_J:
                         arg_json_format_flags = SD_JSON_FORMAT_PRETTY_AUTO|SD_JSON_FORMAT_COLOR_AUTO;
                         break;
 

src/shared/options.h

@@ -68,6 +68,9 @@ typedef struct Option {
         OPTION('M', "machine", "CONTAINER", "Operate on local container")
 #define OPTION_COMMON_JSON \
         OPTION_LONG("json", "FORMAT", "Generate JSON output (pretty, short, or off)")
+#define OPTION_COMMON_LOWERCASE_J \
+        OPTION_SHORT('j', NULL, \
+                     "Equivalent to --json=pretty (on TTY) or --json=short (otherwise)")
 
 /* This is magically mapped to the beginning and end of the section */
 extern const Option __start_SYSTEMD_OPTIONS[];