create-react-native-library/lib/utils/assert.js

CLI to scaffold React Native libraries

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.assertNpxExists = assertNpxExists;
exports.assertUserInput = assertUserInput;
var _kleur = _interopRequireDefault(require("kleur"));
var _spawn = require("./spawn");
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
async function assertNpxExists() {
  try {
    await (0, _spawn.spawn)('npx', ['--help']);
  } catch (error) {
    // @ts-expect-error: TS doesn't know about `code`
    if (error != null && error.code === 'ENOENT') {
      console.log(`Couldn't find ${_kleur.default.blue('npx')}! Please install it by running ${_kleur.default.blue('npm install -g npx')}`);
      process.exit(1);
    } else {
      throw error;
    }
  }
}

/**
 * Makes sure the answers are in expected form and ends the process with error if they are not
 */
function assertUserInput(questions, answers) {
  for (const [key, value] of Object.entries(answers)) {
    if (value == null) {
      continue;
    }
    const question = questions.find(q => q.name === key);
    if (question == null) {
      continue;
    }
    let validation;

    // We also need to guard against invalid choices
    // If we don't already have a validation message to provide a better error
    if ('choices' in question) {
      const choices = typeof question.choices === 'function' ? question.choices(undefined, answers) : question.choices;
      if (choices && choices.every(choice => choice.value !== value)) {
        if (choices.length > 1) {
          validation = `Must be one of ${choices.map(choice => _kleur.default.green(choice.value)).join(', ')}`;
        } else if (choices[0]) {
          validation = `Must be '${_kleur.default.green(choices[0].value)}'`;
        } else {
          validation = false;
        }
      }
    }
    if (validation == null && question.validate) {
      validation = question.validate(String(value));
    }
    if (validation != null && validation !== true) {
      let message = `Invalid value ${_kleur.default.red(String(value))} passed for ${_kleur.default.blue(key)}`;
      if (typeof validation === 'string') {
        message += `: ${validation}`;
      }
      console.log(message);
      process.exit(1);
    }
  }
}
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