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import { Command } from "../command.ts";import { UnknownCommand } from "../_errors.ts";import { CommandType } from "../types/command.ts";
/** Generates well formatted and colored help output for specified command. */export class HelpCommand  extends Command<void, void, void, [commandName?: CommandType]> {  public constructor(cmd?: Command) {    super();    return this      .type("command", new CommandType())      .arguments("[command:command]")      .description("Show this help or the help of a sub-command.")      .action(async (_, name?: string) => {        if (!cmd) {          cmd = name            ? this.getGlobalParent()?.getBaseCommand(name)            : this.getGlobalParent();        }        if (!cmd) {          const cmds = this.getGlobalParent()?.getCommands();          throw new UnknownCommand(name ?? "", cmds ?? [], [            this.getName(),            ...this.getAliases(),          ]);        }        await cmd.checkVersion();        cmd.showHelp();        Deno.exit(0);      });  }}