ESLint React plugin not required to install and could be omited.

All React rules will be added to Ezhome ESLint config only if
React plugin installed. So config can be used for project without
React dependency as well.

Author: playpauseandstop

CHANGELOG.md

@@ -1,3 +1,8 @@
+0.6.0 (2015-12-17)
+==================
+
+* Enable `eslint-plugin-react` rules only if plugin installed and available
+
 0.5.0 (2015-12-02)
 ==================
 

README.md

@@ -15,11 +15,14 @@ This package provides Ezhome's `.eslintrc` as an extensible shared config.
    npm install --save-dev babel-eslint eslint eslint-config-ezhome eslint-plugin-react
    ```
 
+   If your project doesn't use React, you don't need to install
+   `eslint-plugin-react` dev dep.
+
 2. Add `"extends": "ezhome"` to your `.eslintrc`
 
 ### Note on preferred ESLint versions
 
-As of `0.5.0` release, `eslint-config-ezhome` prefers:
+As of `0.6.0` release, `eslint-config-ezhome` prefers:
 
 * `eslint@1.10.3`
 * `babel-eslint@4.1.6`

alternate/index.js

@@ -1,9 +1,13 @@
 var config = require("../");
+var utils = require("../base/utils.js");
 
 config.rules["comma-dangle"] = [2, "always-multiline"];
 config.rules["indent"] = [2, 2, {"SwitchCase": 1}];
 config.rules["max-len"] = [2, 79, 4];
-config.rules["react/jsx-handler-names"] = 2;
-config.rules["react/jsx-indent-props"] = [2, 2];
+
+if (utils.reactPluginInstalled) {
+    config.rules["react/jsx-handler-names"] = 2;
+    config.rules["react/jsx-indent-props"] = [2, 2];
+}
 
 module.exports = config;

base/index.js

@@ -1,4 +1,7 @@
-module.exports = {
+var objectAssign = require("object-assign");
+var utils = require("./utils");
+
+var config = {
     extends: "eslint:recommended",
     parser: "babel-eslint",
 
@@ -41,6 +44,18 @@ module.exports = {
         "object-curly-spacing": [2, "never"],
         "quotes": [2, "double", "avoid-escape"],
         "radix": 2,
+        "semi": [2, "always"],
+        "space-after-keywords": 2,
+        "space-before-blocks": 2,
+        "space-before-function-paren": [2, "never"],
+        "space-in-parens": [2, "never"],
+        "spaced-comment": [2, "always"],
+        "wrap-regex": 2
+    }
+};
+
+if (utils.reactPluginInstalled) {
+    config.rules = objectAssign(config.rules, {
         "react/display-name": 1,
         "react/jsx-closing-bracket-location": [2, "after-props"],
         "react/jsx-curly-spacing": [2, "never", {"allowMultiline": false}],
@@ -62,13 +77,8 @@ module.exports = {
         "react/prop-types": 2,
         "react/react-in-jsx-scope": 1,
         "react/self-closing-comp": 2,
-        "react/wrap-multilines": 2,
-        "semi": [2, "always"],
-        "space-after-keywords": 2,
-        "space-before-blocks": 2,
-        "space-before-function-paren": [2, "never"],
-        "space-in-parens": [2, "never"],
-        "spaced-comment": [2, "always"],
-        "wrap-regex": 2
-    }
-};
+        "react/wrap-multilines": 2
+    });
+}
+
+module.exports = config;

base/utils.js

@@ -0,0 +1,13 @@
+var hasModuleInstalled = function(name) {
+    try {
+        require.resolve(name);
+        return true;
+    } catch (err) {
+        return false;
+    }
+
+};
+
+module.exports = {
+    reactPluginInstalled: hasModuleInstalled("eslint-plugin-react")
+};

index.js

@@ -1,10 +1,14 @@
 var config = require("./base");
+var utils = require("./base/utils.js");
 
-delete config.rules["react/display-name"];
 config.rules["no-var"] = 2;
 config.rules["object-shorthand"] = 2;
 config.rules["prefer-const"] = 2;
 config.rules["prefer-template"] = 2;
-config.rules["react/prefer-es6-class"] = 2;
+
+if (utils.reactPluginInstalled) {
+    delete config.rules["react/display-name"];
+    config.rules["react/prefer-es6-class"] = 2;
+}
 
 module.exports = config;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "eslint-config-ezhome",
-  "version": "0.5.0",
+  "version": "0.6.0",
 
   "author": "Igor Davydenko",
   "authorEmail": "igor@ezhome.com",
@@ -23,6 +23,9 @@
     "url": "https://github.com/ezhome/eslint-config-ezhome"
   },
 
+  "dependencies": {
+    "object-assign": "4.0.1"
+  },
   "devDependencies": {
     "babel-eslint": "4.1.6",
     "eslint": "1.10.3",