Fix to make interrupt work more than once. Closes GH-155.

tasks/lib/taskrun.js

@@ -58,9 +58,11 @@ module.exports = function(grunt) {
         // Run grunt this process uses, append the task to be run and any cli options
         args: self.tasks.concat(self.options.cliArgs || []),
       }, function(err, res, code) {
-        // Spawn is done
-        self.spawned = null;
-        done();
+        if (self.options.interrupt !== true || code !== 130) {
+          // Spawn is done
+          self.spawned = null;
+          done();
+        }
       });
     }
   };

test/fixtures/multiTargets/Gruntfile.js

@@ -5,7 +5,7 @@ module.exports = function(grunt) {
       one: { message: 'one has changed' },
       two: { message: 'two has changed' },
       wait: { message: 'I waited 2s', wait: 2000 },
-      interrupt: { message: 'I want to be interrupted', wait: 5000 },
+      interrupt: { message: 'I want to be interrupted', wait: 3000 },
       fail: { fail: 1, message: 'This task should fail', wait: 1000 },
       cwd: { message: 'cwd works' },
     },

test/fixtures/multiTargets/lib/interrupt.js

@@ -1 +1 @@
-var interrupt = true;
+var interrupt = 3;

test/tasks/watch_test.js

@@ -124,17 +124,23 @@ exports.watch = {
     });
   },
   interrupt: function(test) {
-    test.expect(1);
+    test.expect(2);
     var cwd = path.resolve(fixtures, 'multiTargets');
     var assertWatch = helper.assertTask('watch', {cwd:cwd});
     assertWatch(function() {
-      grunt.file.write(path.join(cwd, 'lib', 'interrupt.js'), 'var interrupt = false;');
+      grunt.file.write(path.join(cwd, 'lib', 'interrupt.js'), 'var interrupt = 1;');
       setTimeout(function() {
-        grunt.file.write(path.join(cwd, 'lib', 'interrupt.js'), 'var interrupt = true;');
+        grunt.file.write(path.join(cwd, 'lib', 'interrupt.js'), 'var interrupt = 2;');
       }, 1000);
+      setTimeout(function() {
+        grunt.file.write(path.join(cwd, 'lib', 'interrupt.js'), 'var interrupt = 3;');
+      }, 2000);
     }, function(result) {
       helper.verboseLog(result);
-      test.ok(result.indexOf('have been interrupted') !== -1, 'Task should have been interrupted.');
+      var interruptMatches = result.match(/have been interrupted/g);
+      test.ok(interruptMatches && interruptMatches.length === 2, 'Task should have been interrupted 2 times.');
+      var unInterruptMatches = result.match(/I want to be interrupted/g);
+      test.ok(unInterruptMatches && unInterruptMatches.length === 1, 'Only the last time should be working (without interruption)');
       test.done();
     });
   },