slaying bugs with gradle and jenkins

Slaying bugsw/ Gradle and Jenkins

David Kay

Wednesday, September 11, 13

Overview

• Gradle

• Jenkins


Build Tools?



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

WTF is ?

• New Build system

• Alternatives

• ant

• maven

• buck


In other words...

Trust me,


it’s awesome.



Vlad putin is not convinced

Build Tools

• ant

• maven

• buck


• Simple

• Mature

• Customizable

What’s Awesome:


In other words, it’s like duct tape


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


It’ll be a great fit

• Lots of work

• No dependency management

What Sucks:


For me, too much work

• Mature

• Comprehensive

• Dependency management

• Easy configuration

What’s Awesome:


• Massively complex

• Shitty integration with libproject / .aar

• Hard to fix

What Sucks:


Buck


Buck

What’s Awesome:

• SOOOO FAST

• Simple

• Easy to compartmentalize project


Buck

What Sucks:

• No dependency management

• No support for running tests on device

• Poor documentation


And the winner is....




HOV!

Basics


Basics

• Built on Groovy


Basics

• Built on Groovy

• gradle files are Groovy files


So, uh, where were we...

Basics

• gradle files are Groovy files

def square(x) { x * x}

in your build file!


Hello World

> gradle -q helloHello world!

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

build.gradle

how to run


LAME


Hello Java

> gradle assemble

apply plugin: 'java'

build.gradle

how to run


Not Bad...


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


Alright!


Hello Android

src/ main/ res/ value/

layout/ ...

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

Directory Structure


Multi-Project

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

settings.gradle

project-root/


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


Test Tools

• Unit tests: Robolectric

• Integration/end-to-end: Robotium


?Wednesday, September 11, 13

OKOKHow do we RUN the tests?


Hello Android

> gradle assemble# compile debug/release/test

> gradle check# run all tests

how to run


Nice!But how do we AUTOMATE it?


Jenkins!!!


like a certain other butler

Jenkins!!!

• Rock-solid

• Plugins

• Hackable/extensible

What’s Awesome:


like a certain other butler


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:


Build SystemBuild Slaves


Build System Ouput

S3 Bucket

Build Errors

Dev Team

Beta Testers


Pitfalls

• Headless Emulator

• Android Emulator / Xvnc delay

• -no-audio


Comprende!


Comprende!

WTF?


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


http://stevehanov.ca/blog/resume_comic.png

http://stevehanov.ca/blog/resume_comic.png

CheckStyle


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>


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

build.gradle

Auto-build Number


Why is this relevant?


Bug Hunting

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

build.gradle

Auto-build Number


Build SystemBuild Slaves


Build System Ouput

S3 Bucket

Build Errors

Dev Team

Beta Testers


Thanks!

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


http://bit.ly/gradle-jenkins

http://bit.ly/gradle-jenkins

Recommended Reading

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


Shameless Pitch

We build apps for iOS & Android

www.gargoyle.co


http://www.gargoyle.co




Contact

David Y. Kay

@DavidYKay

[email protected]


slaying bugs with gradle and jenkins

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