cmd: add support for dynamically generating command options at runtime

cmd/command.c

@@ -282,6 +282,24 @@ struct b_command_usage *b_command_add_usage(struct b_command *cmd)
 	return usage;
 }
 
+const struct b_command_option *b_command_get_option(
+	const struct b_command *cmd, int id)
+{
+	struct b_queue_entry *cur = b_queue_first(&cmd->b_opt);
+	while (cur) {
+		const struct b_command_option *opt
+			= b_unbox(struct b_command_option, cur, opt_entry);
+
+		if (opt->opt_id == id) {
+			return opt;
+		}
+
+		cur = b_queue_next(cur);
+	}
+
+	return NULL;
+}
+
 b_status b_command_usage_add_option(
 	struct b_command_usage *usage, struct b_command_option *opt)
 {

cmd/include/blue/cmd.h

@@ -61,6 +61,12 @@
 	this_opt = opt_##id;                                                   \
 	if (this_opt)
 
+#define B_COMMAND_OPTION_GEN(id)                                               \
+	b_command_option *z__b_unique_name()                                   \
+		= b_command_add_option(this_cmd, (id));                        \
+	this_opt = z__b_unique_name();                                         \
+	if (this_opt)
+
 #define B_COMMAND_HELP_OPTION()                                                  \
 	do {                                                                     \
 		b_command_option *opt                                            \
@@ -210,6 +216,11 @@ BLUE_API b_command_option *b_command_add_option(b_command *cmd, int id);
 BLUE_API b_command_arg *b_command_add_arg(b_command *cmd, int id);
 BLUE_API b_command_usage *b_command_add_usage(b_command *cmd);
 
+BLUE_API const b_command_option *b_command_get_option(const b_command *cmd, int id);
+
+BLUE_API const char *b_command_option_get_long_name(const b_command_option *opt);
+BLUE_API char b_command_option_get_short_name(const b_command_option *opt);
+BLUE_API const char *b_command_option_get_description(b_command_option *opt);
 BLUE_API b_status b_command_option_set_long_name(
 	b_command_option *opt, const char *name);
 BLUE_API b_status b_command_option_set_short_name(b_command_option *opt, char name);

cmd/option.c

@@ -42,6 +42,21 @@ void b_command_option_destroy(struct b_command_option *opt)
 	free(opt);
 }
 
+const char *b_command_option_get_long_name(const struct b_command_option *opt)
+{
+	return opt->opt_long_name;
+}
+
+char b_command_option_get_short_name(const struct b_command_option *opt)
+{
+	return opt->opt_short_name;
+}
+
+const char *b_command_option_get_description(struct b_command_option *opt)
+{
+	return opt->opt_description;
+}
+
 b_status b_command_option_set_long_name(
 	struct b_command_option *opt, const char *name)
 {