feat: add no-async-functions rule

yyx990803 · yyx990803 · commit 675c9636ac8c · 2017-12-28T17:43:09.000-05:00
diff --git a/index.js b/index.js
@@ -5,6 +5,7 @@ module.exports = {
     recommended: require('./config')
   },
   rules: {
-    'jsx-uses-vars': require('./rules/jsx-uses-vars')
+    'jsx-uses-vars': require('./rules/jsx-uses-vars'),
+    'no-async-functions': require('./rules/no-async-functions')
   }
 }
diff --git a/rules/no-async-functions.js b/rules/no-async-functions.js
@@ -0,0 +1,27 @@
+module.exports = {
+  meta: {
+    docs: {
+      description: 'Disallow use of async functions (for codebases targeting Node 6.x)',
+      category: 'Custom',
+      recommended: false
+    },
+    schema: []
+  },
+
+  create (context) {
+    function report (node) {
+      if (node.async) {
+        context.report({
+          node,
+          message: "async functions are disallowed for Node 6.x compatibility."
+        })
+      }
+    }
+
+    return {
+      FunctionDeclaration: report,
+      FunctionExpression: report,
+      ArrowFunctionExpression: report
+    }
+  }
+}

Original file line number	Diff line number	Diff line change
`@@ -5,6 +5,7 @@ module.exports = {`
`5`	`5`	`recommended: require('./config')`
`6`	`6`	`},`
`7`	`7`	`rules: {`
`8`		`- 'jsx-uses-vars': require('./rules/jsx-uses-vars')`
	`8`	`+ 'jsx-uses-vars': require('./rules/jsx-uses-vars'),`
	`9`	`+ 'no-async-functions': require('./rules/no-async-functions')`
`9`	`10`	`}`
`10`	`11`	`}`