Added rule no-mixin.

lib/rules/no-mixin.js

@@ -0,0 +1,64 @@
+/*
+ * @fileoverview Create and use events instead of mixins modifications.
+ */
+'use strict';
+
+const message = 'Do not use mixins.';
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: message,
+            category: 'Migration',
+            recommended: false
+        },
+        fixable: null,  // or "code" or "whitespace"
+        schema: [
+            // fill in your schema
+        ]
+    },
+
+    create: function (context) {
+
+        // variables should be defined here
+        const code = context.getSourceCode().lines.join('\n');
+
+        //----------------------------------------------------------------------
+        // Helpers
+        //----------------------------------------------------------------------
+        const program = (node) => {
+
+            const regex = /(?:import|from)\s+\'[^']*\/(Mixins\/)/g;
+
+            let match;
+
+            while (match = regex.exec(code)) {
+                const codeBefore = code.substr(0, regex.lastIndex - match[1].length);
+                const linesBefore = codeBefore.split('\n');
+                const line = linesBefore[linesBefore.length - 1];
+
+                context.report({
+                    node: node,
+                    loc: {
+                        line: linesBefore.length,
+                        column: line.length
+                    },
+                    message: message
+                });
+            }
+        };
+
+        //----------------------------------------------------------------------
+        // Public
+        //----------------------------------------------------------------------
+        return {
+
+            Program: program
+
+        };
+    }
+};