1 files changed, 60 insertions, 0 deletions
diff --git a/tools/eslint/lib/rules/no-multiple-empty-lines.js b/tools/eslint/lib/rules/no-multiple-empty-lines.js
new file mode 100644
index 0000000000..9cfea63daa
--- /dev/null
+++ b/tools/eslint/lib/rules/no-multiple-empty-lines.js
@@ -0,0 +1,60 @@
+/**
+ * @fileoverview Disallows multiple blank lines.
+ * implementation adapted from the no-trailing-spaces rule.
+ * @author Greg Cochard
+ * @copyright 2014 Greg Cochard. All rights reserved.
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = function(context) {
+
+    // Use options.max or 2 as default
+    var numLines = 2;
+
+    if (context.options.length) {
+        numLines = context.options[0].max;
+    }
+
+    //--------------------------------------------------------------------------
+    // Public
+    //--------------------------------------------------------------------------
+
+    return {
+
+        "Program": function checkBlankLines(node) {
+            var lines = context.getSourceLines(),
+                currentLocation = -1,
+                lastLocation,
+                blankCounter = 0,
+                location,
+                trimmedLines = lines.map(function(str) {
+                    return str.trim();
+                });
+
+            // Aggregate and count blank lines
+            do {
+                lastLocation = currentLocation;
+                currentLocation = trimmedLines.indexOf("", currentLocation + 1);
+                if (lastLocation === currentLocation - 1) {
+                    blankCounter++;
+                } else {
+                    if (blankCounter >= numLines) {
+                        location = {
+                            line: lastLocation + 1,
+                            column: lines[lastLocation].length
+                        };
+                        context.report(node, location, "Multiple blank lines not allowed.");
+                    }
+
+                    // Finally, reset the blank counter
+                    blankCounter = 0;
+                }
+            } while (currentLocation !== -1);
+        }
+    };
+
+};