tools: replace closure-linter with eslint

PR-URL: https://github.com/iojs/io.js/pull/1539
Fixes: https://github.com/iojs/io.js/issues/1253
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com>
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/tools/eslint/lib/rules/no-regex-spaces.js b/tools/eslint/lib/rules/no-regex-spaces.js
new file mode 100644
index 0000000000..edbf76d513
--- /dev/null
+++ b/tools/eslint/lib/rules/no-regex-spaces.js
@@ -0,0 +1,33 @@
+/**
+ * @fileoverview Rule to count multiple spaces in regular expressions
+ * @author Matt DuVall <http://www.mattduvall.com/>
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = function(context) {
+
+    return {
+
+        "Literal": function(node) {
+            var token = context.getFirstToken(node),
+                nodeType = token.type,
+                nodeValue = token.value,
+                multipleSpacesRegex = /( {2,})+?/,
+                regexResults;
+
+            if (nodeType === "RegularExpression") {
+                regexResults = multipleSpacesRegex.exec(nodeValue);
+
+                if (regexResults !== null) {
+                    context.report(node, "Spaces are hard to count. Use {" + regexResults[0].length + "}.");
+                }
+            }
+        }
+    };
+
+};