no-commonjs.js 13 KB

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  1. 'use strict';
  2. var _docsUrl = require('../docsUrl');
  3. var _docsUrl2 = _interopRequireDefault(_docsUrl);
  4. function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
  5. const EXPORT_MESSAGE = 'Expected "export" or "export default"',
  6. IMPORT_MESSAGE = 'Expected "import" instead of "require()"'; /**
  7. * @fileoverview Rule to prefer ES6 to CJS
  8. * @author Jamund Ferguson
  9. */
  10. function normalizeLegacyOptions(options) {
  11. if (options.indexOf('allow-primitive-modules') >= 0) {
  12. return { allowPrimitiveModules: true };
  13. }
  14. return options[0] || {};
  15. }
  16. function allowPrimitive(node, options) {
  17. if (!options.allowPrimitiveModules) return false;
  18. if (node.parent.type !== 'AssignmentExpression') return false;
  19. return node.parent.right.type !== 'ObjectExpression';
  20. }
  21. function allowRequire(node, options) {
  22. return options.allowRequire;
  23. }
  24. function allowConditionalRequire(node, options) {
  25. return options.allowConditionalRequire !== false;
  26. }
  27. function validateScope(scope) {
  28. return scope.variableScope.type === 'module';
  29. }
  30. // https://github.com/estree/estree/blob/master/es5.md
  31. function isConditional(node) {
  32. if (node.type === 'IfStatement' || node.type === 'TryStatement' || node.type === 'LogicalExpression' || node.type === 'ConditionalExpression') return true;
  33. if (node.parent) return isConditional(node.parent);
  34. return false;
  35. }
  36. //------------------------------------------------------------------------------
  37. // Rule Definition
  38. //------------------------------------------------------------------------------
  39. const schemaString = { enum: ['allow-primitive-modules'] };
  40. const schemaObject = {
  41. type: 'object',
  42. properties: {
  43. allowPrimitiveModules: { 'type': 'boolean' },
  44. allowRequire: { 'type': 'boolean' },
  45. allowConditionalRequire: { 'type': 'boolean' }
  46. },
  47. additionalProperties: false
  48. };
  49. module.exports = {
  50. meta: {
  51. type: 'suggestion',
  52. docs: {
  53. url: (0, _docsUrl2.default)('no-commonjs')
  54. },
  55. schema: {
  56. anyOf: [{
  57. type: 'array',
  58. items: [schemaString],
  59. additionalItems: false
  60. }, {
  61. type: 'array',
  62. items: [schemaObject],
  63. additionalItems: false
  64. }]
  65. }
  66. },
  67. create: function (context) {
  68. const options = normalizeLegacyOptions(context.options);
  69. return {
  70. 'MemberExpression': function (node) {
  71. // module.exports
  72. if (node.object.name === 'module' && node.property.name === 'exports') {
  73. if (allowPrimitive(node, options)) return;
  74. context.report({ node, message: EXPORT_MESSAGE });
  75. }
  76. // exports.
  77. if (node.object.name === 'exports') {
  78. const isInScope = context.getScope().variables.some(variable => variable.name === 'exports');
  79. if (!isInScope) {
  80. context.report({ node, message: EXPORT_MESSAGE });
  81. }
  82. }
  83. },
  84. 'CallExpression': function (call) {
  85. if (!validateScope(context.getScope())) return;
  86. if (call.callee.type !== 'Identifier') return;
  87. if (call.callee.name !== 'require') return;
  88. if (call.arguments.length !== 1) return;
  89. var module = call.arguments[0];
  90. if (module.type !== 'Literal') return;
  91. if (typeof module.value !== 'string') return;
  92. if (allowRequire(call, options)) return;
  93. if (allowConditionalRequire(call, options) && isConditional(call.parent)) return;
  94. // keeping it simple: all 1-string-arg `require` calls are reported
  95. context.report({
  96. node: call.callee,
  97. message: IMPORT_MESSAGE
  98. });
  99. }
  100. };
  101. }
  102. };
  103. //# 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* @fileoverview Rule to prefer ES6 to CJS\n * @author Jamund Ferguson\n */\n\nimport docsUrl from '../docsUrl'\n\nconst EXPORT_MESSAGE = 'Expected \"export\" or \"export default\"'\n    , IMPORT_MESSAGE = 'Expected \"import\" instead of \"require()\"'\n\nfunction normalizeLegacyOptions(options) {\n  if (options.indexOf('allow-primitive-modules') >= 0) {\n    return { allowPrimitiveModules: true }\n  }\n  return options[0] || {}\n}\n\nfunction allowPrimitive(node, options) {\n  if (!options.allowPrimitiveModules) return false\n  if (node.parent.type !== 'AssignmentExpression') return false\n  return (node.parent.right.type !== 'ObjectExpression')\n}\n\nfunction allowRequire(node, options) {\n  return options.allowRequire\n}\n\nfunction allowConditionalRequire(node, options) {\n  return options.allowConditionalRequire !== false\n}\n\nfunction validateScope(scope) {\n  return scope.variableScope.type === 'module'\n}\n\n// https://github.com/estree/estree/blob/master/es5.md\nfunction isConditional(node) {\n  if (\n    node.type === 'IfStatement'\n    || node.type === 'TryStatement'\n    || node.type === 'LogicalExpression'\n    || node.type === 'ConditionalExpression'\n  ) return true\n  if (node.parent) return isConditional(node.parent)\n  return false\n}\n\n//------------------------------------------------------------------------------\n// Rule Definition\n//------------------------------------------------------------------------------\n\nconst schemaString = { enum: ['allow-primitive-modules'] }\nconst schemaObject = {\n  type: 'object',\n  properties: {\n    allowPrimitiveModules: { 'type': 'boolean' },\n    allowRequire: { 'type': 'boolean' },\n    allowConditionalRequire: { 'type': 'boolean' },\n  },\n  additionalProperties: false,\n}\n\nmodule.exports = {\n  meta: {\n    type: 'suggestion',\n    docs: {\n      url: docsUrl('no-commonjs'),\n    },\n\n    schema: {\n      anyOf: [\n        {\n          type: 'array',\n          items: [schemaString],\n          additionalItems: false,\n        },\n        {\n          type: 'array',\n          items: [schemaObject],\n          additionalItems: false,\n        },\n      ],\n    },\n  },\n\n  create: function (context) {\n    const options = normalizeLegacyOptions(context.options)\n\n    return {\n\n      'MemberExpression': function (node) {\n\n        // module.exports\n        if (node.object.name === 'module' && node.property.name === 'exports') {\n          if (allowPrimitive(node, options)) return\n          context.report({ node, message: EXPORT_MESSAGE })\n        }\n\n        // exports.\n        if (node.object.name === 'exports') {\n          const isInScope = context.getScope()\n            .variables\n            .some(variable => variable.name === 'exports')\n          if (! isInScope) {\n            context.report({ node, message: EXPORT_MESSAGE })\n          }\n        }\n\n      },\n      'CallExpression': function (call) {\n        if (!validateScope(context.getScope())) return\n\n        if (call.callee.type !== 'Identifier') return\n        if (call.callee.name !== 'require') return\n\n        if (call.arguments.length !== 1) return\n        var module = call.arguments[0]\n\n        if (module.type !== 'Literal') return\n        if (typeof module.value !== 'string') return\n\n        if (allowRequire(call, options)) return\n\n        if (allowConditionalRequire(call, options) && isConditional(call.parent)) return\n\n        // keeping it simple: all 1-string-arg `require` calls are reported\n        context.report({\n          node: call.callee,\n          message: IMPORT_MESSAGE,\n        })\n      },\n    }\n\n  },\n}\n"]}