Add example with custom task in one and separate files

22-custom-task-in-buildSrc/build.gradle

@@ -0,0 +1,10 @@
+apply plugin: 'groovy'
+
+import com.ysoft.greeting.GreetingTask
+
+task hello(type: GreetingTask)
+
+// Customize the greeting
+task greeting(type: GreetingTask) {
+    greeting = 'greetings from Brno'
+}

22-custom-task-in-buildSrc/buildSrc/src/main/groovy/com/ysoft/greeting/GreetingTask.groovy

@@ -0,0 +1,13 @@
+package com.ysoft.greeting
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.tasks.TaskAction
+
+class GreetingTask extends DefaultTask {
+    String greeting = 'hello from Y Soft'
+
+    @TaskAction
+    def greet() {
+        println greeting
+    }
+}