slaying bugs with gradle and jenkins

Slaying bugsw/ Gradle and Jenkins

David Kay

Wednesday, September 11, 13

Overview

• Gradle

• Jenkins

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Build Tools?

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Unless your name is John Carmack, you aren’t.So what are we left with?

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WTF is ?

• New Build system

• Alternatives

• ant

• maven

• buck

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In other words...

Trust me,

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it’s awesome.

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Vlad putin is not convinced

Build Tools

• ant

• maven

• buck

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• Simple

• Mature

• Customizable

What’s Awesome:

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In other words, it’s like duct tape

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If you’re the kind of person to build a prom dress out of duct tape

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It’ll be a great fit

• Lots of work

• No dependency management

What Sucks:

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For me, too much work

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• Mature

• Comprehensive

• Dependency management

• Easy configuration

What’s Awesome:

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• Massively complex

• Shitty integration with libproject / .aar

• Hard to fix

What Sucks:

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Buck

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Buck

What’s Awesome:

• SOOOO FAST

• Simple

• Easy to compartmentalize project

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Buck

What Sucks:

• No dependency management

• No support for running tests on device

• Poor documentation

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And the winner is....

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And the winner is....

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HOV!

And the winner is....

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Basics

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Basics

• Built on Groovy

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Basics

• Built on Groovy

• gradle files are Groovy files

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So, uh, where were we...

Basics

• gradle files are Groovy files

def square(x) { x * x}

in your build file!

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Hello World

> gradle -q helloHello world!

task hello { doLast { println 'Hello world!' }}

build.gradle

how to run

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LAME

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Hello Java

> gradle assemble

apply plugin: 'java'

build.gradle

how to run

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Not Bad...

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Hello Android

buildscript { dependencies { classpath 'com.android.tools.build:gradle:0.5.6' }}

apply plugin: 'android'

android { compileSdkVersion 17}

build.gradle

> gradle assemblehow to run

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Alright!

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Hello Android

src/ main/ res/ value/

layout/ ...

java/ com/ ... test/ res/ .... src/ ....

Directory Structure

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Multi-Project

include ':HelloGradle', ':vendor:volley'

settings.gradle

project-root/

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Dependencies

...

dependencies { // from a local jar compile files('jackson.jar') // from maven central/etc compile 'com.jayway.android.robotium:robotium-solo:4.2' // from a library project compile project(':vendor:volley')}

...

build.gradle

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Test Tools

• Unit tests: Robolectric

• Integration/end-to-end: Robotium

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OKOKHow do we RUN the tests?

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Hello Android

> gradle assemble# compile debug/release/test

> gradle check# run all tests

how to run

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Nice!But how do we AUTOMATE it?

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Jenkins!!!

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like a certain other butler

Jenkins!!!

• Rock-solid

• Plugins

• Hackable/extensible

What’s Awesome:

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like a certain other butler

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Won’t tell you stories about Burmese jewel bandits....but at least he won’t walk out on you to prove a point.

Jenkins!!!

• First-time config

• Android Emulator :(

• Resource-intensive

What Sucks:

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Build SystemBuild Slaves

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Build System Ouput

S3 Bucket

Build Errors

Dev Team

Beta Testers

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Pitfalls

• Headless Emulator

• Android Emulator / Xvnc delay

• -no-audio

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Comprende!

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Comprende!

WTF?

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“How a programmer reads your resume” - Steve Hanovhttp://stevehanov.ca/blog/resume_comic.png

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CheckStyle

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CheckStyle<module name="Checker"> <module name="TreeWalker">

<property name="tabWidth" value="2"/> <module name="Indentation"> <property name="caseIndent" value="2"/> <property name="basicOffset" value="2"/> </module>

<module name="GenericWhitespace"/> <module name="AvoidStarImport"/> <module name="ConstantName"/> <module name="EmptyBlock"/>

<module name="MemberName"/> <module name="ConstantName"/> <module name="MethodName"/> <module name="TypeName"/> </module>

<module name="StrictDuplicateCode"> <property name="min" value="15"/> </module></module>

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defaultConfig { versionName '0.1.1' versionCode System.env.BUILD_NUMBER ? "$System.env.BUILD_NUMBER".toInteger() : 2}

build.gradle

Auto-build Number

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Why is this relevant?

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Bug Hunting

defaultConfig { versionName '0.1.1' versionCode System.env.BUILD_NUMBER ? "$System.env.BUILD_NUMBER".toInteger() : 2}

build.gradle

Auto-build Number

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Build SystemBuild Slaves

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Build System Ouput

S3 Bucket

Build Errors

Dev Team

Beta Testers

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Thanks!

• http://bit.ly/gradle-jenkins for the code

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Recommended Reading

Android Gradle Plugin User GuideGrowing Object-Oriented Software, Guided By Tests

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Shameless Pitch

We build apps for iOS & Android

www.gargoyle.co

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Contact

David Y. Kay

@DavidYKay

dk@gargoyle.co

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