Method #loadCommandByName

packages/webpack-cli/src/webpack-cli.ts:2476–2528

(commandName: string)

  }

  async #loadCommandByName(commandName: string): Promise<Command | undefined> {
    if (this.#isCommand(commandName, this.#commands.build)) {
      return await this.makeCommand(this.#commands.build);
    } else if (this.#isCommand(commandName, this.#commands.serve)) {
      return await this.makeCommand(this.#commands.serve);
    } else if (this.#isCommand(commandName, this.#commands.watch)) {
      return await this.makeCommand(this.#commands.watch);
    } else if (this.#isCommand(commandName, this.#commands.help)) {
      // Stub for the `help` command
      return await this.makeCommand(this.#commands.help);
    } else if (this.#isCommand(commandName, this.#commands.version)) {
      return await this.makeCommand(this.#commands.version);
    } else if (this.#isCommand(commandName, this.#commands.info)) {
      return await this.makeCommand(this.#commands.info);
    } else if (this.#isCommand(commandName, this.#commands.configtest)) {
      return await this.makeCommand(this.#commands.configtest);
    }

    const pkg: string = commandName;

    type Instantiable<
      InstanceType = unknown,
      ConstructorParameters extends unknown[] = unknown[],
    > = new (...args: ConstructorParameters) => InstanceType & { apply(cli: WebpackCLI): Command };

    let LoadedCommand: Instantiable<() => void>;

    try {
      LoadedCommand = (await import(pkg)).default;
    } catch (error) {
      if ((error as NodeJS.ErrnoException).code !== "ERR_MODULE_NOT_FOUND") {
        this.logger.error(`Unable to load '${pkg}' command`);
        this.logger.error(error);
        process.exit(2);
      }

      return;
    }

    let command;
    let externalCommand: Command;

    try {
      command = new LoadedCommand();
      externalCommand = await command.apply(this);
    } catch (error) {
      this.logger.error(`Unable to load '${pkg}' command`);
      this.logger.error(error);
      process.exit(2);
    }

    return externalCommand;
  }

  async run(args: readonly string[], parseOptions: ParseOptions) {
    // Default `--color` and `--no-color` options