[New] named: add commonjs option

Author: vikr01

CHANGELOG.md

@@ -8,6 +8,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 
 ### Added
 - [`no-dynamic-require`]: add option `esmodule` ([#1223], thanks [@vikr01])
+- [`named`]: add `commonjs` option ([#1222], thanks [@vikr01])
 
 ### Fixed
 - [`no-duplicates`]: ensure autofix avoids excessive newlines ([#2028], thanks [@ertrzyiks])
@@ -891,7 +892,6 @@ for info on changes for earlier releases.
 [#1619]: https://github.com/benmosher/eslint-plugin-import/pull/1619
 [#1612]: https://github.com/benmosher/eslint-plugin-import/pull/1612
 [#1611]: https://github.com/benmosher/eslint-plugin-import/pull/1611
-[#1223]: https://github.com/benmosher/eslint-plugin-import/pull/1223
 [#1605]: https://github.com/benmosher/eslint-plugin-import/pull/1605
 [#1586]: https://github.com/benmosher/eslint-plugin-import/pull/1586
 [#1572]: https://github.com/benmosher/eslint-plugin-import/pull/1572
@@ -963,6 +963,8 @@ for info on changes for earlier releases.
 [#1235]: https://github.com/benmosher/eslint-plugin-import/pull/1235
 [#1234]: https://github.com/benmosher/eslint-plugin-import/pull/1234
 [#1232]: https://github.com/benmosher/eslint-plugin-import/pull/1232
+[#1223]: https://github.com/benmosher/eslint-plugin-import/pull/1223
+[#1222]: https://github.com/benmosher/eslint-plugin-import/pull/1222
 [#1218]: https://github.com/benmosher/eslint-plugin-import/pull/1218
 [#1176]: https://github.com/benmosher/eslint-plugin-import/pull/1176
 [#1163]: https://github.com/benmosher/eslint-plugin-import/pull/1163

src/rules/named.js

@@ -8,10 +8,22 @@ module.exports = {
     docs: {
       url: docsUrl('named'),
     },
-    schema: [],
+    schema: [
+      {
+        type: 'object',
+        properties: {
+          commonjs: {
+            type: 'boolean',
+          },
+        },
+        additionalProperties: false,
+      },
+    ],
   },
 
   create: function (context) {
+    const options = context.options[0] || {};
+
     function checkSpecifiers(key, type, node) {
       // ignore local exports and type imports/exports
       if (
@@ -38,12 +50,11 @@ module.exports = {
       }
 
       node.specifiers.forEach(function (im) {
-        if (im.type !== type) {
-          return;
-        }
-
-        // ignore type imports
-        if (im.importKind === 'type' || im.importKind === 'typeof') {
+        if (
+          im.type !== type
+          // ignore type imports
+          || im.importKind === 'type' || im.importKind === 'typeof'
+        ) {
           return;
         }
 
@@ -63,10 +74,65 @@ module.exports = {
       });
     }
 
+    function checkRequire(node) {
+      if (
+        !options.commonjs
+        || node.type !== 'VariableDeclarator'
+        // return if it's not an object destructure or it's an empty object destructure
+        || !node.id || node.id.type !== 'ObjectPattern' || node.id.properties.length === 0
+        // return if there is no call expression on the right side
+        || !node.init || node.init.type !== 'CallExpression'
+      ) {
+        return;
+      }
+
+      const call = node.init;
+      const [source] = call.arguments;
+      const variableImports = node.id.properties;
+      const variableExports = Exports.get(source.value, context);
+
+      if (
+        // return if it's not a commonjs require statement
+        call.callee.type !== 'Identifier' || call.callee.name !== 'require' || call.arguments.length !== 1
+        // return if it's not a string source
+        || source.type !== 'Literal'
+        || variableExports == null
+      ) {
+        return;
+      }
+
+      if (variableExports.errors.length) {
+        variableExports.reportErrors(context, node);
+        return;
+      }
+
+      variableImports.forEach(function (im) {
+        if (im.type !== 'Property' || !im.key || im.key.type !== 'Identifier') {
+          return;
+        }
+
+        const deepLookup = variableExports.hasDeep(im.key.name);
+
+        if (!deepLookup.found) {
+          if (deepLookup.path.length > 1) {
+            const deepPath = deepLookup.path
+              .map(i => path.relative(path.dirname(context.getFilename()), i.path))
+              .join(' -> ');
+
+            context.report(im.key, `${im.key.name} not found via ${deepPath}`);
+          } else {
+            context.report(im.key, im.key.name + ' not found in \'' + source.value + '\'');
+          }
+        }
+      });
+    }
+
     return {
       ImportDeclaration: checkSpecifiers.bind(null, 'imported', 'ImportSpecifier'),
 
       ExportNamedDeclaration: checkSpecifiers.bind(null, 'local', 'ExportSpecifier'),
+
+      VariableDeclarator: checkRequire,
     };
   },
 };

tests/src/rules/named.js

@@ -146,6 +146,41 @@ ruleTester.run('named', rule, {
       code: 'import { common } from "./re-export-default"',
     }),
 
+    // destructured requires with commonjs option
+    test({
+      code: 'const { destructuredProp } = require("./named-exports")',
+      options: [{ commonjs: true }],
+    }),
+    test({
+      code: 'let { arrayKeyProp } = require("./named-exports")',
+      options: [{ commonjs: true }],
+    }),
+    test({
+      code: 'const { deepProp } = require("./named-exports")',
+      options: [{ commonjs: true }],
+    }),
+
+    test({
+      code: 'const { foo, bar } = require("./re-export-names")',
+      options: [{ commonjs: true }],
+    }),
+
+    test({
+      code: 'const { baz } = require("./bar")',
+      errors: [error('baz', './bar')],
+    }),
+
+    test({
+      code: 'const { baz } = require("./bar")',
+      errors: [error('baz', './bar')],
+      options: [{ commonjs: false }],
+    }),
+
+    test({
+      code: 'const { default: defExport } = require("./bar")',
+      options: [{ commonjs: true }],
+    }),
+
     ...SYNTAX_CASES,
   ],
 
@@ -201,6 +236,30 @@ ruleTester.run('named', rule, {
       errors: ['baz not found via broken-trampoline.js -> named-exports.js'],
     }),
 
+    test({
+      code: 'const { baz } = require("./bar")',
+      errors: [error('baz', './bar')],
+      options: [{ commonjs: true }],
+    }),
+
+    test({
+      code: 'let { baz } = require("./bar")',
+      errors: [error('baz', './bar')],
+      options: [{ commonjs: true }],
+    }),
+
+    test({
+      code: 'const { baz: bar, bop } = require("./bar"), { a } = require("./re-export-names")',
+      errors: [error('baz', './bar'), error('bop', './bar'), error('a', './re-export-names')],
+      options: [{ commonjs: true }],
+    }),
+
+    test({
+      code: 'const { default: defExport } = require("./named-exports")',
+      errors: [error('default', './named-exports')],
+      options: [{ commonjs: true }],
+    }),
+
     // parse errors
     // test({
     //   code: "import { a } from './test.coffee';",