no-commonjs.js 14 KB

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