1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
'use strict';
var _docsUrl = require('../docsUrl');
var _docsUrl2 = _interopRequireDefault(_docsUrl);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const meta = {
type: 'suggestion',
docs: {
url: (0, _docsUrl2.default)('group-exports')
}
/* eslint-disable max-len */
};const errors = {
ExportNamedDeclaration: 'Multiple named export declarations; consolidate all named exports into a single export declaration',
AssignmentExpression: 'Multiple CommonJS exports; consolidate all exports into a single assignment to `module.exports`'
/* eslint-enable max-len */
/**
* Returns an array with names of the properties in the accessor chain for MemberExpression nodes
*
* Example:
*
* `module.exports = {}` => ['module', 'exports']
* `module.exports.property = true` => ['module', 'exports', 'property']
*
* @param {Node} node AST Node (MemberExpression)
* @return {Array} Array with the property names in the chain
* @private
*/
};function accessorChain(node) {
const chain = [];
do {
chain.unshift(node.property.name);
if (node.object.type === 'Identifier') {
chain.unshift(node.object.name);
break;
}
node = node.object;
} while (node.type === 'MemberExpression');
return chain;
}
function create(context) {
const nodes = {
modules: new Set(),
commonjs: new Set()
};
return {
ExportNamedDeclaration(node) {
nodes.modules.add(node);
},
AssignmentExpression(node) {
if (node.left.type !== 'MemberExpression') {
return;
}
const chain = accessorChain(node.left);
// Assignments to module.exports
// Deeper assignments are ignored since they just modify what's already being exported
// (ie. module.exports.exported.prop = true is ignored)
if (chain[0] === 'module' && chain[1] === 'exports' && chain.length <= 3) {
nodes.commonjs.add(node);
return;
}
// Assignments to exports (exports.* = *)
if (chain[0] === 'exports' && chain.length === 2) {
nodes.commonjs.add(node);
return;
}
},
'Program:exit': function onExit() {
// Report multiple `export` declarations (ES2015 modules)
if (nodes.modules.size > 1) {
nodes.modules.forEach(node => {
context.report({
node,
message: errors[node.type]
});
});
}
// Report multiple `module.exports` assignments (CommonJS)
if (nodes.commonjs.size > 1) {
nodes.commonjs.forEach(node => {
context.report({
node,
message: errors[node.type]
});
});
}
}
};
}
module.exports = {
meta,
create
};
//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInJ1bGVzL2dyb3VwLWV4cG9ydHMuanMiXSwibmFtZXMiOlsibWV0YSIsInR5cGUiLCJkb2NzIiwidXJsIiwiZXJyb3JzIiwiRXhwb3J0TmFtZWREZWNsYXJhdGlvbiIsIkFzc2lnbm1lbnRFeHByZXNzaW9uIiwiYWNjZXNzb3JDaGFpbiIsIm5vZGUiLCJjaGFpbiIsInVuc2hpZnQiLCJwcm9wZXJ0eSIsIm5hbWUiLCJvYmplY3QiLCJjcmVhdGUiLCJjb250ZXh0Iiwibm9kZXMiLCJtb2R1bGVzIiwiU2V0IiwiY29tbW9uanMiLCJhZGQiLCJsZWZ0IiwibGVuZ3RoIiwib25FeGl0Iiwic2l6ZSIsImZvckVhY2giLCJyZXBvcnQiLCJtZXNzYWdlIiwibW9kdWxlIiwiZXhwb3J0cyJdLCJtYXBwaW5ncyI6Ijs7QUFBQTs7Ozs7O0FBRUEsTUFBTUEsT0FBTztBQUNYQyxRQUFNLFlBREs7QUFFWEMsUUFBTTtBQUNKQyxTQUFLLHVCQUFRLGVBQVI7QUFERDtBQUlSO0FBTmEsQ0FBYixDQU9BLE1BQU1DLFNBQVM7QUFDYkMsMEJBQXdCLG9HQURYO0FBRWJDLHdCQUFzQjtBQUV4Qjs7QUFFQTs7Ozs7Ozs7Ozs7O0FBTmUsQ0FBZixDQWtCQSxTQUFTQyxhQUFULENBQXVCQyxJQUF2QixFQUE2QjtBQUMzQixRQUFNQyxRQUFRLEVBQWQ7O0FBRUEsS0FBRztBQUNEQSxVQUFNQyxPQUFOLENBQWNGLEtBQUtHLFFBQUwsQ0FBY0MsSUFBNUI7O0FBRUEsUUFBSUosS0FBS0ssTUFBTCxDQUFZWixJQUFaLEtBQXFCLFlBQXpCLEVBQXVDO0FBQ3JDUSxZQUFNQyxPQUFOLENBQWNGLEtBQUtLLE1BQUwsQ0FBWUQsSUFBMUI7QUFDQTtBQUNEOztBQUVESixXQUFPQSxLQUFLSyxNQUFaO0FBQ0QsR0FURCxRQVNTTCxLQUFLUCxJQUFMLEtBQWMsa0JBVHZCOztBQVdBLFNBQU9RLEtBQVA7QUFDRDs7QUFFRCxTQUFTSyxNQUFULENBQWdCQyxPQUFoQixFQUF5QjtBQUN2QixRQUFNQyxRQUFRO0FBQ1pDLGFBQVMsSUFBSUMsR0FBSixFQURHO0FBRVpDLGNBQVUsSUFBSUQsR0FBSjtBQUZFLEdBQWQ7O0FBS0EsU0FBTztBQUNMYiwyQkFBdUJHLElBQXZCLEVBQTZCO0FBQzNCUSxZQUFNQyxPQUFOLENBQWNHLEdBQWQsQ0FBa0JaLElBQWxCO0FBQ0QsS0FISTs7QUFLTEYseUJBQXFCRSxJQUFyQixFQUEyQjtBQUN6QixVQUFJQSxLQUFLYSxJQUFMLENBQVVwQixJQUFWLEtBQW1CLGtCQUF2QixFQUEyQztBQUN6QztBQUNEOztBQUVELFlBQU1RLFFBQVFGLGNBQWNDLEtBQUthLElBQW5CLENBQWQ7O0FBRUE7QUFDQTtBQUNBO0FBQ0EsVUFBSVosTUFBTSxDQUFOLE1BQWEsUUFBYixJQUF5QkEsTUFBTSxDQUFOLE1BQWEsU0FBdEMsSUFBbURBLE1BQU1hLE1BQU4sSUFBZ0IsQ0FBdkUsRUFBMEU7QUFDeEVOLGNBQU1HLFFBQU4sQ0FBZUMsR0FBZixDQUFtQlosSUFBbkI7QUFDQTtBQUNEOztBQUVEO0FBQ0EsVUFBSUMsTUFBTSxDQUFOLE1BQWEsU0FBYixJQUEwQkEsTUFBTWEsTUFBTixLQUFpQixDQUEvQyxFQUFrRDtBQUNoRE4sY0FBTUcsUUFBTixDQUFlQyxHQUFmLENBQW1CWixJQUFuQjtBQUNBO0FBQ0Q7QUFDRixLQXpCSTs7QUEyQkwsb0JBQWdCLFNBQVNlLE1BQVQsR0FBa0I7QUFDaEM7QUFDQSxVQUFJUCxNQUFNQyxPQUFOLENBQWNPLElBQWQsR0FBcUIsQ0FBekIsRUFBNEI7QUFDMUJSLGNBQU1DLE9BQU4sQ0FBY1EsT0FBZCxDQUFzQmpCLFFBQVE7QUFDNUJPLGtCQUFRVyxNQUFSLENBQWU7QUFDYmxCLGdCQURhO0FBRWJtQixxQkFBU3ZCLE9BQU9JLEtBQUtQLElBQVo7QUFGSSxXQUFmO0FBSUQsU0FMRDtBQU1EOztBQUVEO0FBQ0EsVUFBSWUsTUFBTUcsUUFBTixDQUFlSyxJQUFmLEdBQXNCLENBQTFCLEVBQTZCO0FBQzNCUixjQUFNRyxRQUFOLENBQWVNLE9BQWYsQ0FBdUJqQixRQUFRO0FBQzdCTyxrQkFBUVcsTUFBUixDQUFlO0FBQ2JsQixnQkFEYTtBQUVibUIscUJBQVN2QixPQUFPSSxLQUFLUCxJQUFaO0FBRkksV0FBZjtBQUlELFNBTEQ7QUFNRDtBQUNGO0FBL0NJLEdBQVA7QUFpREQ7O0FBRUQyQixPQUFPQyxPQUFQLEdBQWlCO0FBQ2Y3QixNQURlO0FBRWZjO0FBRmUsQ0FBakIiLCJmaWxlIjoicnVsZXMvZ3JvdXAtZXhwb3J0cy5qcyIsInNvdXJjZXNDb250ZW50IjpbImltcG9ydCBkb2NzVXJsIGZyb20gJy4uL2RvY3NVcmwnXG5cbmNvbnN0IG1ldGEgPSB7XG4gIHR5cGU6ICdzdWdnZXN0aW9uJyxcbiAgZG9jczoge1xuICAgIHVybDogZG9jc1VybCgnZ3JvdXAtZXhwb3J0cycpLFxuICB9LFxufVxuLyogZXNsaW50LWRpc2FibGUgbWF4LWxlbiAqL1xuY29uc3QgZXJyb3JzID0ge1xuICBFeHBvcnROYW1lZERlY2xhcmF0aW9uOiAnTXVsdGlwbGUgbmFtZWQgZXhwb3J0IGRlY2xhcmF0aW9uczsgY29uc29saWRhdGUgYWxsIG5hbWVkIGV4cG9ydHMgaW50byBhIHNpbmdsZSBleHBvcnQgZGVjbGFyYXRpb24nLFxuICBBc3NpZ25tZW50RXhwcmVzc2lvbjogJ011bHRpcGxlIENvbW1vbkpTIGV4cG9ydHM7IGNvbnNvbGlkYXRlIGFsbCBleHBvcnRzIGludG8gYSBzaW5nbGUgYXNzaWdubWVudCB0byBgbW9kdWxlLmV4cG9ydHNgJyxcbn1cbi8qIGVzbGludC1lbmFibGUgbWF4LWxlbiAqL1xuXG4vKipcbiAqIFJldHVybnMgYW4gYXJyYXkgd2l0aCBuYW1lcyBvZiB0aGUgcHJvcGVydGllcyBpbiB0aGUgYWNjZXNzb3IgY2hhaW4gZm9yIE1lbWJlckV4cHJlc3Npb24gbm9kZXNcbiAqXG4gKiBFeGFtcGxlOlxuICpcbiAqIGBtb2R1bGUuZXhwb3J0cyA9IHt9YCA9PiBbJ21vZHVsZScsICdleHBvcnRzJ11cbiAqIGBtb2R1bGUuZXhwb3J0cy5wcm9wZXJ0eSA9IHRydWVgID0+IFsnbW9kdWxlJywgJ2V4cG9ydHMnLCAncHJvcGVydHknXVxuICpcbiAqIEBwYXJhbSAgICAge05vZGV9ICAgIG5vZGUgICAgQVNUIE5vZGUgKE1lbWJlckV4cHJlc3Npb24pXG4gKiBAcmV0dXJuICAgIHtBcnJheX0gICAgICAgICAgIEFycmF5IHdpdGggdGhlIHByb3BlcnR5IG5hbWVzIGluIHRoZSBjaGFpblxuICogQHByaXZhdGVcbiAqL1xuZnVuY3Rpb24gYWNjZXNzb3JDaGFpbihub2RlKSB7XG4gIGNvbnN0IGNoYWluID0gW11cblxuICBkbyB7XG4gICAgY2hhaW4udW5zaGlmdChub2RlLnByb3BlcnR5Lm5hbWUpXG5cbiAgICBpZiAobm9kZS5vYmplY3QudHlwZSA9PT0gJ0lkZW50aWZpZXInKSB7XG4gICAgICBjaGFpbi51bnNoaWZ0KG5vZGUub2JqZWN0Lm5hbWUpXG4gICAgICBicmVha1xuICAgIH1cblxuICAgIG5vZGUgPSBub2RlLm9iamVjdFxuICB9IHdoaWxlIChub2RlLnR5cGUgPT09ICdNZW1iZXJFeHByZXNzaW9uJylcblxuICByZXR1cm4gY2hhaW5cbn1cblxuZnVuY3Rpb24gY3JlYXRlKGNvbnRleHQpIHtcbiAgY29uc3Qgbm9kZXMgPSB7XG4gICAgbW9kdWxlczogbmV3IFNldCgpLFxuICAgIGNvbW1vbmpzOiBuZXcgU2V0KCksXG4gIH1cblxuICByZXR1cm4ge1xuICAgIEV4cG9ydE5hbWVkRGVjbGFyYXRpb24obm9kZSkge1xuICAgICAgbm9kZXMubW9kdWxlcy5hZGQobm9kZSlcbiAgICB9LFxuXG4gICAgQXNzaWdubWVudEV4cHJlc3Npb24obm9kZSkge1xuICAgICAgaWYgKG5vZGUubGVmdC50eXBlICE9PSAnTWVtYmVyRXhwcmVzc2lvbicpIHtcbiAgICAgICAgcmV0dXJuXG4gICAgICB9XG5cbiAgICAgIGNvbnN0IGNoYWluID0gYWNjZXNzb3JDaGFpbihub2RlLmxlZnQpXG5cbiAgICAgIC8vIEFzc2lnbm1lbnRzIHRvIG1vZHVsZS5leHBvcnRzXG4gICAgICAvLyBEZWVwZXIgYXNzaWdubWVudHMgYXJlIGlnbm9yZWQgc2luY2UgdGhleSBqdXN0IG1vZGlmeSB3aGF0J3MgYWxyZWFkeSBiZWluZyBleHBvcnRlZFxuICAgICAgLy8gKGllLiBtb2R1bGUuZXhwb3J0cy5leHBvcnRlZC5wcm9wID0gdHJ1ZSBpcyBpZ25vcmVkKVxuICAgICAgaWYgKGNoYWluWzBdID09PSAnbW9kdWxlJyAmJiBjaGFpblsxXSA9PT0gJ2V4cG9ydHMnICYmIGNoYWluLmxlbmd0aCA8PSAzKSB7XG4gICAgICAgIG5vZGVzLmNvbW1vbmpzLmFkZChub2RlKVxuICAgICAgICByZXR1cm5cbiAgICAgIH1cblxuICAgICAgLy8gQXNzaWdubWVudHMgdG8gZXhwb3J0cyAoZXhwb3J0cy4qID0gKilcbiAgICAgIGlmIChjaGFpblswXSA9PT0gJ2V4cG9ydHMnICYmIGNoYWluLmxlbmd0aCA9PT0gMikge1xuICAgICAgICBub2Rlcy5jb21tb25qcy5hZGQobm9kZSlcbiAgICAgICAgcmV0dXJuXG4gICAgICB9XG4gICAgfSxcblxuICAgICdQcm9ncmFtOmV4aXQnOiBmdW5jdGlvbiBvbkV4aXQoKSB7XG4gICAgICAvLyBSZXBvcnQgbXVsdGlwbGUgYGV4cG9ydGAgZGVjbGFyYXRpb25zIChFUzIwMTUgbW9kdWxlcylcbiAgICAgIGlmIChub2Rlcy5tb2R1bGVzLnNpemUgPiAxKSB7XG4gICAgICAgIG5vZGVzLm1vZHVsZXMuZm9yRWFjaChub2RlID0+IHtcbiAgICAgICAgICBjb250ZXh0LnJlcG9ydCh7XG4gICAgICAgICAgICBub2RlLFxuICAgICAgICAgICAgbWVzc2FnZTogZXJyb3JzW25vZGUudHlwZV0sXG4gICAgICAgICAgfSlcbiAgICAgICAgfSlcbiAgICAgIH1cblxuICAgICAgLy8gUmVwb3J0IG11bHRpcGxlIGBtb2R1bGUuZXhwb3J0c2AgYXNzaWdubWVudHMgKENvbW1vbkpTKVxuICAgICAgaWYgKG5vZGVzLmNvbW1vbmpzLnNpemUgPiAxKSB7XG4gICAgICAgIG5vZGVzLmNvbW1vbmpzLmZvckVhY2gobm9kZSA9PiB7XG4gICAgICAgICAgY29udGV4dC5yZXBvcnQoe1xuICAgICAgICAgICAgbm9kZSxcbiAgICAgICAgICAgIG1lc3NhZ2U6IGVycm9yc1tub2RlLnR5cGVdLFxuICAgICAgICAgIH0pXG4gICAgICAgIH0pXG4gICAgICB9XG4gICAgfSxcbiAgfVxufVxuXG5tb2R1bGUuZXhwb3J0cyA9IHtcbiAgbWV0YSxcbiAgY3JlYXRlLFxufVxuIl19