recommended shared config (#402)

CHANGELOG.md

@@ -4,6 +4,11 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 This change log adheres to standards from [Keep a CHANGELOG](http://keepachangelog.com).
 
 ## [Unreleased]
+### Added
+- `recommended` shared config. Roughly `errors` and `warnings` mixed together,
+  with some `parserOptions` in the mix. ([#402])
+- `react` shared config: added `jsx: true` to `parserOptions.ecmaFeatures`.
+
 ### Breaking
 - [`import/extensions` setting] defaults to `['.js']`. ([#306])
 - [`import/ignore` setting] defaults to nothing, and ambiguous modules are ignored natively. This means importing from CommonJS modules will no longer be reported by [`default`], [`named`], or [`namespace`], regardless of `import/ignore`. ([#270])
@@ -280,6 +285,7 @@ for info on changes for earlier releases.
 [#157]: https://github.com/benmosher/eslint-plugin-import/pull/157
 [#314]: https://github.com/benmosher/eslint-plugin-import/pull/314
 
+[#402]: https://github.com/benmosher/eslint-plugin-import/issues/402
 [#386]: https://github.com/benmosher/eslint-plugin-import/issues/386
 [#373]: https://github.com/benmosher/eslint-plugin-import/issues/373
 [#370]: https://github.com/benmosher/eslint-plugin-import/issues/370

config/react.js

@@ -1,8 +1,18 @@
 /**
- * - adds `.jsx` as an extension
+ * Adds `.jsx` as an extension, and enables JSX parsing.
+ *
+ * Even if _you_ aren't using JSX (or .jsx) directly, if your dependencies
+ * define jsnext:main and have JSX internally, you may run into problems
+ * if you don't enable these settings at the top level.
  */
 module.exports = {
+
   settings: {
     'import/extensions': ['.js', '.jsx'],
   },
+
+  parserOptions: {
+    ecmaFeatures: { jsx: true },
+  },
+
 }

config/recommended.js

@@ -0,0 +1,27 @@
+/**
+ * The basics.
+ * @type {Object}
+ */
+module.exports = {
+  rules: {
+    // analysis/correctness
+    'import/no-unresolved': 'error',
+    'import/named': 'error',
+    'import/namespace': 'error',
+    'import/default': 'error',
+    'import/export': 'error',
+
+    // red flags (thus, warnings)
+    'import/no-named-as-default': 'warn',
+    'import/no-named-as-default-member': 'warn',
+    'import/no-duplicates': 'warn',
+  },
+
+  // need all these for parsing dependencies (even if _your_ code doesn't need
+  // all of them)
+  parserOptions: {
+    sourceType: 'module',
+    ecmaVersion: 6,
+    ecmaFeatures: { experimentalObjectRestSpread: true },
+  },
+}