From 6aaac874481916ae0dcd80c320bcb3a8c7cc55f9 Mon Sep 17 00:00:00 2001
From: Javier Carrillo <stringparser@gmail.com>
Date: Mon, 8 Jun 2015 12:20:37 +0200
Subject: [PATCH 1/2] enhance: adds not found warning

---
 index.js | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/index.js b/index.js
index 891c4fd..0a49df9 100644
--- a/index.js
+++ b/index.js
@@ -29,11 +29,36 @@ var repl = readline.createInterface({
 repl.on('line', function onLine(line){
   line = line.trim();
   if(!line){ return repl.prompt(); }
-  var runner = gulp.parallel || gulp.start;
-  var result = runner.apply(gulp, line.split(/[ ]+/));
-  if(typeof result === 'function'){ // gulp#4.0
-    result();
+
+  var tasks;
+  if(gulp._registry){
+    tasks = gulp._registry && gulp._registry._tasks;
+  } else { tasks = gulp.tasks; }
+
+  var notFound = [];
+  line = line.split(/[ ]+/).filter(function(name){
+    if(tasks && !tasks[name]){
+      notFound.push(name);
+    } else { return true; }
+  });
+
+  if(notFound.length){
+    var plural = notFound.length > 1;
+    console.log(
+      ' Warning: `%s` task%s %s undefined',
+      notFound.join(', '),
+      plural ? 's' : '',
+      plural ? 'are' : 'is'
+    );
+
+    if(!line.length){ return repl.prompt(); }
   }
+
+  var runner = gulp.parallel || gulp.start;
+  var result = runner.apply(gulp, line);
+
+  // gulp#4.0
+  if(typeof result === 'function'){ result(); }
 });
 
 exports = module.exports = repl;

From a5179802f6deaf695b2253b4fe40a831e4768922 Mon Sep 17 00:00:00 2001
From: Javier Carrillo <stringparser@gmail.com>
Date: Mon, 8 Jun 2015 12:21:27 +0200
Subject: [PATCH 2/2] test: adds notFound test

---
 test/index.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/test/index.js b/test/index.js
index c8cf0f8..c713eb4 100644
--- a/test/index.js
+++ b/test/index.js
@@ -1,6 +1,6 @@
 'use strict';
 
-require('should');
+var should = require('should');
 
 describe('gulp-repl', function(){
   var gulp = require('gulp');
@@ -17,4 +17,12 @@ describe('gulp-repl', function(){
     gulp.task('two', function(cb){ two = true; done(); cb(); });
     repl.emit('line', 'one two');
   });
+
+  it('undefined tasks should not run', function(){
+    gulp.task('one', function(){});
+    var tasks = gulp.tasks || gulp._registry._tasks;
+    should.exist(tasks);
+
+    repl.emit('line', 'whatever');
+  });
 });