Rock the Gradle Rule the world

About… Lead Android Engineer at WorkWell Fluent in Android since Cupcake 2

A brief introduction 1

Dependency Management System What is Gradle General Purpose Build management 4

5 General purpose Language agnostic Feature agnostic

6 Dependency management system Knows how to graph and resolve dependencies ◇ code ◇ tasks ◇ …

7 Build management Based on tasks created by plugins

Configuration Gradle flow Initialisation Execution 8

9 Initialisation Launches the JVM (with proper params) Analyse the working directory Reads the settings.gradle file Creates the Project object(s) that will be used Compiles, test and add buildSrc to the classpath

10 Configuration Execute all the build.gradle scripts in the project Create all the Task objects and configure the Project object(s) Resolves the tasks dependencies

11 Execution List the Task to run based on the invocation (and their dependencies) Execute each of the tasks

Meet the buildSrc folder 2

Project structure ┬ MyProject ├┬ app/ │├── src/ │└── build.gradle ├┬ buildSrc/ │├── src/ │├── build.gradle │└── settings.gradle ├─ build.gradle └─ settings.gradle 13

Purposes… ◇ Better dependency management ◇ Helper classes / methods ◇ Custom tasks in dedicated classes ◇ Custom plugin ￭ Locally versionned with the project 14

How does it work? ◇ Works like any module in your project ◇ Compiled and tested before any gradle task ◇ Groovy, Java, Kotlin, … ◇ Any public class / method becomes availble in gradle scripts 15

“ A change in buildSrc causes the whole project to become out-of-date. 16

apply plugin: 'groovy' dependencies { compile gradleApi() compile localGroovy() } 17 Default build.gradle

Writin a Plugin 3

Hands On 19

Thanks! Any questions? ◇ https://github.com/xgouchet/RockTheGradle ◇ @xgouchet 20