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no-multi-comp.js
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no-multi-comp.js
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/**
* @fileoverview Prevent multiple component definition per file
* @author Yannick Croissant
*/
'use strict';
var Components = require('../util/Components');
// ------------------------------------------------------------------------------
// Rule Definition
// ------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: 'Prevent multiple component definition per file',
category: 'Stylistic Issues',
recommended: false
},
schema: [{
type: 'object',
properties: {
ignoreStateless: {
default: false,
type: 'boolean'
}
},
additionalProperties: false
}]
},
create: Components.detect(function(context, components) {
var configuration = context.options[0] || {};
var ignoreStateless = configuration.ignoreStateless || false;
var MULTI_COMP_MESSAGE = 'Declare only one React component per file';
/**
* Checks if the component is ignored
* @param {Object} component The component being checked.
* @returns {Boolean} True if the component is ignored, false if not.
*/
function isIgnored(component) {
return ignoreStateless && /Function/.test(component.node.type);
}
// --------------------------------------------------------------------------
// Public
// --------------------------------------------------------------------------
return {
'Program:exit': function() {
if (components.length() <= 1) {
return;
}
var list = components.list();
var i = 0;
for (var component in list) {
if (!list.hasOwnProperty(component) || isIgnored(list[component]) || ++i === 1) {
continue;
}
context.report({
node: list[component].node,
message: MULTI_COMP_MESSAGE
});
}
}
};
})
};