76 lines
2.2 KiB
JavaScript
76 lines
2.2 KiB
JavaScript
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/**
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* @fileoverview Utility functions for React pragma configuration
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* @author Yannick Croissant
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*/
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'use strict';
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const getSourceCode = require('./eslint').getSourceCode;
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const JSX_ANNOTATION_REGEX = /@jsx\s+([^\s]+)/;
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// Does not check for reserved keywords or unicode characters
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const JS_IDENTIFIER_REGEX = /^[_$a-zA-Z][_$a-zA-Z0-9]*$/;
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/**
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* @param {Context} context
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* @returns {string}
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*/
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function getCreateClassFromContext(context) {
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let pragma = 'createReactClass';
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// .eslintrc shared settings (https://eslint.org/docs/user-guide/configuring#adding-shared-settings)
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if (context.settings.react && context.settings.react.createClass) {
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pragma = context.settings.react.createClass;
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}
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if (!JS_IDENTIFIER_REGEX.test(pragma)) {
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throw new Error(`createClass pragma ${pragma} is not a valid function name`);
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}
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return pragma;
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}
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/**
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* @param {Context} context
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* @returns {string}
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*/
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function getFragmentFromContext(context) {
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let pragma = 'Fragment';
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// .eslintrc shared settings (https://eslint.org/docs/user-guide/configuring#adding-shared-settings)
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if (context.settings.react && context.settings.react.fragment) {
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pragma = context.settings.react.fragment;
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}
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if (!JS_IDENTIFIER_REGEX.test(pragma)) {
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throw new Error(`Fragment pragma ${pragma} is not a valid identifier`);
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}
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return pragma;
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}
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/**
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* @param {Context} context
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* @returns {string}
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*/
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function getFromContext(context) {
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let pragma = 'React';
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const sourceCode = getSourceCode(context);
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const pragmaNode = sourceCode.getAllComments().find((node) => JSX_ANNOTATION_REGEX.test(node.value));
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if (pragmaNode) {
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const matches = JSX_ANNOTATION_REGEX.exec(pragmaNode.value);
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pragma = matches[1].split('.')[0];
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// .eslintrc shared settings (https://eslint.org/docs/user-guide/configuring#adding-shared-settings)
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} else if (context.settings.react && context.settings.react.pragma) {
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pragma = context.settings.react.pragma;
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}
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if (!JS_IDENTIFIER_REGEX.test(pragma)) {
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console.warn(`React pragma ${pragma} is not a valid identifier`);
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return 'React';
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}
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return pragma;
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}
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module.exports = {
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getCreateClassFromContext,
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getFragmentFromContext,
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getFromContext,
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};
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