blob: 8a33d1d314e881c4c6f1cc58152abd241834f91b [file] [log] [blame]
'use strict';
var _ExportMap = require('../ExportMap');
var _ExportMap2 = _interopRequireDefault(_ExportMap);
var _importDeclaration = require('../importDeclaration');
var _importDeclaration2 = _interopRequireDefault(_importDeclaration);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
/**
* @fileoverview Rule to warn about potentially confused use of name exports
* @author Desmond Brand
* @copyright 2016 Desmond Brand. All rights reserved.
* See LICENSE in root directory for full license.
*/
module.exports = {
meta: {
docs: {}
},
create: function (context) {
const fileImports = new Map();
const allPropertyLookups = new Map();
function handleImportDefault(node) {
const declaration = (0, _importDeclaration2.default)(context);
const exportMap = _ExportMap2.default.get(declaration.source.value, context);
if (exportMap == null) return;
if (exportMap.errors.length) {
exportMap.reportErrors(context, declaration);
return;
}
fileImports.set(node.local.name, {
exportMap,
sourcePath: declaration.source.value
});
}
function storePropertyLookup(objectName, propName, node) {
const lookups = allPropertyLookups.get(objectName) || [];
lookups.push({ node, propName });
allPropertyLookups.set(objectName, lookups);
}
function handlePropLookup(node) {
const objectName = node.object.name;
const propName = node.property.name;
storePropertyLookup(objectName, propName, node);
}
function handleDestructuringAssignment(node) {
const isDestructure = node.id.type === 'ObjectPattern' && node.init != null && node.init.type === 'Identifier';
if (!isDestructure) return;
const objectName = node.init.name;
for (const _ref of node.id.properties) {
const key = _ref.key;
if (key == null) continue; // true for rest properties
storePropertyLookup(objectName, key.name, key);
}
}
function handleProgramExit() {
allPropertyLookups.forEach((lookups, objectName) => {
const fileImport = fileImports.get(objectName);
if (fileImport == null) return;
for (const _ref2 of lookups) {
const propName = _ref2.propName;
const node = _ref2.node;
// the default import can have a "default" property
if (propName === 'default') continue;
if (!fileImport.exportMap.namespace.has(propName)) continue;
context.report({
node,
message: `Caution: \`${objectName}\` also has a named export ` + `\`${propName}\`. Check if you meant to write ` + `\`import {${propName}} from '${fileImport.sourcePath}'\` ` + 'instead.'
});
}
});
}
return {
'ImportDefaultSpecifier': handleImportDefault,
'MemberExpression': handlePropLookup,
'VariableDeclarator': handleDestructuringAssignment,
'Program:exit': handleProgramExit
};
}
};
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