1. #!/usr/bin/env node
  3. const process = require('process');
  5. /**
  6. * Formats command-line options with basic sanity checks.
  7. * @param {object} options - The parsed command-line options object.
  8. * @returns {string} - Formatted output string.
  9. */
  10. function formatOptions(options) {
  11. let output = '';
  13. // Basic sanity checks
  14. if (!options.name) {
  15. return "Error: --name is required.";
  16. }
  18. if (typeof options.age !== 'number' || options.age < 0) {
  19. return "Error: --age must be a non-negative number.";
  20. }
  22. if (options.verbose !== undefined && typeof options.verbose !== 'boolean') {
  23. return "Error: --verbose must be a boolean value.";
  24. }
  26. output += `Name: ${options.name}\n`;
  27. output += `Age: ${options.age}\n`;
  29. if (options.verbose) {
  30. output += `Verbose mode enabled.\n`;
  31. }
  33. if (options.email) {
  34. output += `Email: ${options.email}\n`;
  35. }
  37. if (options.id) {
  38. output += `ID: ${options.id}\n`;
  39. }
  40. return output;
  41. }
  43. // Example usage (simulating command-line parsing)
  44. const parsedArgs = {
  45. name: 'John Doe',
  46. age: 30,
  47. verbose: true,
  48. email: 'john.doe@example.com',
  49. id: '12345'
  50. };
  52. const formattedOutput = formatOptions(parsedArgs);
  53. console.log(formattedOutput);
  55. //Another example with error
  56. const parsedArgsError = {
  57. name: '',
  58. age: -5
  59. };
  61. const formattedOutputError = formatOptions(parsedArgsError);
  62. console.log(formattedOutputError);

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