message: [vcpkg env] Add argument to run a command
diff: @@ -23,9 +23,9 @@ namespace vcpkg::Commands::Env
  }};
  const CommandStructure COMMAND_STRUCTURE = {
  - Help::create_example_string("env --triplet x64-windows"),
  - 0,
  + Help::create_example_string("env <optional command> --triplet x64-windows"),
  0,
  + 1,
  {SWITCHES, {}},
  nullptr,
  };
  @@ -64,11 +64,12 @@ namespace vcpkg::Commands::Env
  if (add_python) extra_env.emplace("PYTHONPATH", (paths.installed / triplet.to_string() / "python").u8string());
  if (path_vars.size() > 0) extra_env.emplace("PATH", Strings::join(";", path_vars));
  - if (env_cmd.empty())
  - System::cmd_execute_clean("cmd", extra_env);
  - else
  - System::cmd_execute_clean(env_cmd + " && cmd", extra_env);
  + std::string env_cmd_prefix = env_cmd.empty() ? "" : Strings::format("%s &&", env_cmd);
  + std::string env_cmd_suffix =
  + args.command_arguments.empty() ? "cmd" : Strings::format("cmd /c %s", args.command_arguments.at(0));
  + const std::string cmd = Strings::format("%s %s", env_cmd_prefix, env_cmd_suffix);
  + System::cmd_execute_clean(cmd, extra_env);
  Checks::exit_success(VCPKG_LINE_INFO);
  }
  }
  