Создаст основу для cli

src/cli/cli-application.ts

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+import { Command } from './commands/command.interface.js';
+import { CommandParser } from './command-parser.js';
+
+type CommandCollection = Record<string, Command>;
+
+export class CLIApplication {
+  private commands: CommandCollection = {};
+
+  constructor(
+    private readonly defaultCommand: string = '--help'
+  ) {}
+
+  public registerCommands(commandList: Command[]): void {
+    commandList.forEach((command) => {
+      if (Object.hasOwn(this.commands, command.getName())) {
+        throw new Error(`Command ${command.getName()} is already registered`);
+      }
+      this.commands[command.getName()] = command;
+    });
+  }
+
+  public getCommand(commandName: string): Command {
+    return this.commands[commandName] ?? this.getDefaultCommand();
+  }
+
+  public getDefaultCommand(): Command | never {
+    if (! this.commands[this.defaultCommand]) {
+      throw new Error(`The default command (${this.defaultCommand}) is not registered.`);
+    }
+    return this.commands[this.defaultCommand];
+  }
+
+  public processCommand(argv: string[]): void {
+    const parsedCommand = CommandParser.parse(argv);
+    const [commandName] = Object.keys(parsedCommand);
+    const command = this.getCommand(commandName);
+    const commandArguments = parsedCommand[commandName] ?? [];
+    command.execute(...commandArguments);
+  }
+}

src/cli/command-parser.ts

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+type ParsedCommand = Record<string, string[]>
+
+export class CommandParser {
+  static parse(cliArguments: string[]): ParsedCommand {
+    const parsedCommand: ParsedCommand = {};
+    let currentCommand = '';
+
+    for (const argument of cliArguments) {
+      if (argument.startsWith('--')) {
+        parsedCommand[argument] = [];
+        currentCommand = argument;
+      } else if (currentCommand && argument) {
+        parsedCommand[currentCommand].push(argument);
+      }
+    }
+
+    return parsedCommand;
+  }
+}

src/cli/commands/command.interface.ts

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+export interface Command {
+  getName(): string;
+  execute(...parameters: string[]): void;
+}

src/cli/commands/help.command.ts

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+import { Command } from './command.interface.js';
+
+export class HelpCommand implements Command {
+  public getName(): string {
+    return '--help';
+  }
+
+  public async execute(..._parameters: string[]): Promise<void> {
+    console.info(`
+        Программа для подготовки данных для REST API сервера.
+        Пример:
+            cli.js --<command> [--arguments]
+        Команды:
+            --version:                   # выводит номер версии
+            --help:                      # печатает этот текст
+            --import <path>:             # импортирует данные из TSV
+            --generate <n> <path> <url>  # генерирует произвольное количество тестовых данных
+    `);
+  }
+}

src/cli/commands/version.command.ts

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+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+import {Command} from './command.interface.js';
+
+type PackageJSONConfig = {
+  version: string;
+}
+
+function isPackageJSONConfig(value: unknown): value is PackageJSONConfig {
+  return (
+    typeof value === 'object' &&
+    value !== null &&
+    !Array.isArray(value) &&
+    Object.hasOwn(value, 'version')
+  );
+}
+
+export class VersionCommand implements Command {
+  constructor(
+    private readonly filePath: string = './package.json'
+  ) {}
+
+  private readVersion(): string {
+    const jsonContent = readFileSync(resolve(this.filePath), 'utf-8');
+    const importedContent: unknown = JSON.parse(jsonContent);
+
+    if (! isPackageJSONConfig(importedContent)) {
+      throw new Error('Failed to parse json content.');
+    }
+
+    return importedContent.version;
+  }
+
+  public getName(): string {
+    return '--version';
+  }
+
+  public async execute(..._parameters: string[]): Promise<void> {
+    try {
+      const version = this.readVersion();
+      console.info(version);
+    } catch (error: unknown) {
+      console.error(`Failed to read version from ${this.filePath}`);
+
+      if (error instanceof Error) {
+        console.error(error.message);
+      }
+    }
+  }
+}

src/cli/index.ts

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+export * from './cli-application.js';
+export * from './command-parser.js';
+export * from './commands/help.command.js';
+export * from './commands/version.command.js';

src/main.cli.ts

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+import { CLIApplication, HelpCommand, VersionCommand } from './cli/index.js';
+
+function bootstrap() {
+  const cliApplication = new CLIApplication();
+  cliApplication.registerCommands([
+    new HelpCommand(),
+    new VersionCommand()
+  ]);
+
+  cliApplication.processCommand(process.argv);
+}
+
+bootstrap();