Add content of the todo statement to message

CHANGELOG.md

@@ -10,6 +10,10 @@
   instance variables to be `private`.  
   [Olivier Halligon](https://github.com/AliSoftware)
 
+* Add content of the todo statement to message.  
+  [J. Cheyo Jimenez](https://github.com/masters3d)
+  [#478](https://github.com/realm/SwiftLint/issues/478)
+
 * Add `LegacyNSGeometryFunctionsRule` rule. Add `NSSize`, `NSPoint`, and 
   `NSRect` constants and constructors to existing rules.  
   [David Rönnqvist](https://github.com/d-ronnqvist)

Source/SwiftLintFramework/Rules/TodoRule.swift

@@ -41,14 +41,48 @@ public struct TodoRule: ConfigurationProviderRule {
         ]
     )
 
+    private func customMessage(lines: [Line], location: Location) -> String {
+            var reason = self.dynamicType.description.description
+
+            guard let lineIndex = location.line,
+                  let currentLine = lines.filter({ $0.index == lineIndex }).first
+                  else { return reason }
+
+            // customizing the reason message to be specific to fixme or todo
+            var message = currentLine.content
+            if currentLine.content.containsString("FIXME") {
+                reason = "FIXMEs should be avoided"
+                message = message.stringByReplacingOccurrencesOfString("FIXME", withString: "")
+            } else {
+                reason = "TODOs should be avoided"
+                message = message.stringByReplacingOccurrencesOfString("TODO", withString: "")
+            }
+            message = message.stringByReplacingOccurrencesOfString("//", withString: "")
+
+            // limiting the output length of todo message
+            let maxLengthOfMessage = 30
+            if message.utf16.count > maxLengthOfMessage {
+                let index = message.startIndex.advancedBy(maxLengthOfMessage)
+                reason += message.substringToIndex(index) + "..."
+            } else {
+                reason += message
+            }
+
+            return reason
+    }
+
     public func validateFile(file: File) -> [StyleViolation] {
         return file.matchPattern("\\b(TODO|FIXME)\\b").flatMap { range, syntaxKinds in
             if !syntaxKinds.filter({ !$0.isCommentLike }).isEmpty {
                 return nil
             }
+            let location = Location(file: file, characterOffset: range.location)
+            let reason = customMessage(file.lines, location: location)
+
             return StyleViolation(ruleDescription: self.dynamicType.description,
                 severity: configuration.severity,
-                location: Location(file: file, characterOffset: range.location))
+                location: location,
+                reason: reason )
         }
     }
 }