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Pragmatic Gradle for your Multi-Module Projects @CliveLeeHere

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https://www.oviahealth.com/careers

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https://www.oviahealth.com/careers

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Terminology

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{ Project

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{ Project Root Project

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{ Project

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Project Modules

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Project Modules Subproject

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Project Modules

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Project Modules App

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Project Modules App Libraries

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“Pragmatic”

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“Multi-Module”

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App 1 Library Feature B Feature A App 2

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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Tips https://github.com/cliveleehere/multimodulegradle

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But First…

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But First… ! Update Gradle (4.6)

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But First… ! Update Gradle (4.6) ! Update Android Gradle Plugin (3.0.1)

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But First… ! Update Gradle (4.6) ! Update Android Gradle Plugin (3.0.1) ! android-cache-fix-gradle-plugin

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But First… ! Update Gradle (4.6) ! Update Android Gradle Plugin (3.0.1) ! android-cache-fix-gradle-plugin ! Gradle Properties

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But First… ! Update Gradle (4.6) ! Update Android Gradle Plugin (3.0.1) ! android-cache-fix-gradle-plugin ! Gradle Properties AWESOME!

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Update Gradle ./gradle-wrapper.properties
 distributionUrl=...-4.6-all.zip

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Update Gradle ./gradle-wrapper.properties
 distributionUrl=...-4.6-all.zip or File > Project Structure > Project

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Android Gradle Plugin ./build.gradle classpath
 'com.android.tools.build:gradle:3.0.1' or File > Project Structure > Project

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Android Gradle Plugin ./build.gradle classpath
 'com.android.tools.build:gradle:3.0.1' or File > Project Structure > Project

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android-cache-fix-gradle-plugin ./build.gradle plugins { id "org.gradle.android.cache-fix" version "0.3.6" }

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Gradle.Properties

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Gradle.Properties org.gradle.parallel=true

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Gradle.Properties org.gradle.parallel=true org.gradle.caching=true

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Gradle.Properties org.gradle.parallel=true org.gradle.caching=true org.gradle.configureondemand=true

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Gradle.Properties org.gradle.parallel=true org.gradle.caching=true org.gradle.configureondemand=true

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Parallel Execution

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Dependency Management

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Terminology: Dependency

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Terminology: Dependency ‘com.google.dagger:dagger:2.15’ implementation

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Terminology: Dependency ‘com.google.dagger:dagger:2.15’ coordinates

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Terminology: Dependency ‘com.google.dagger:dagger:2.15’ group coordinates

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Terminology: Dependency ‘com.google.dagger:dagger:2.15’ group name coordinates

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Terminology: Dependency ‘com.google.dagger:dagger:2.15’ group name coordinates version

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The Problem

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The Problem ./app/build.gradle implementation ‘com.google.dagger:dagger:2.15’

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The Problem ./app/build.gradle implementation ‘com.google.dagger:dagger:2.15’ ./lib/build.gradle implementation¡ ‘com.google.dagger:dagger:2.15’

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The Problem ./app/build.gradle implementation ‘com.google.dagger:dagger:2.15’ ./lib/build.gradle implementation¡ ‘com.google.dagger:dagger:2.15’ implementation ‘com.google.dagger:dagger-android:2.15’

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Dependency Management, part 1

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Dependency Management, part 1 ./build.gradle ext { DAGGER=‘2.15’ }

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Dependency Management, part 1 ./build.gradle ext { DAGGER=‘2.15’ } ./app/build.gradle implementation “com.google.dagger:dagger:$DAGGER”

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Dependency Management, part 1 ./app/build.gradle implementation “com.google.dagger:dagger:$DAGGER”

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Dependency Management, part 1 ./app/build.gradle implementation “...:$rootProject.ext.daggerVersion”

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Dependency Management, part 1 ./app/build.gradle implementation “...:$DAGGER_VERSION”

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Dependency Management, part 2

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Dependency Management, part 2 ./build.gradle ext { DAGGER_VERSION=‘2.15’ dagger=“com.google.dagger:dagger: $DAGGER_VERSION” } ./app/build.gradle implementation rootProject.ext.dagger

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Dependency Management, part 2 ./build.gradle ext { DAGGER_VERSION=‘2.15’ dagger=“com.google.dagger:dagger:$DAGGER_VERSION” } ./app/build.gradle implementation rootProject.ext.dagger

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Dependency Management, part 2 rootProject.ext.dagger

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Dependency Management, part 2 rootProject.dagger

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Dependency Management, part 2 dagger

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Dependency Management, part 2 daggerLibrary

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Dependency Management, part 3

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Dependency Management, part 3 ./build.gradle ./app/build.gradle ./versions.gradle

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Dependency Management, part 3 ./versions.gradle ext.deps = [:]

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Dependency Management, part 3 ./versions.gradle ext.deps = [:] def versions = [:] versions.dagger = "2.15"

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Dependency Management, part 3 ./versions.gradle ext.deps = [:] def versions = [:] versions.dagger = "2.15" def deps = [:] def dagger = [:] dagger.runtime = "com.google.dagger:dagger$versions.dagger"

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Dependency Management, part 3 ./versions.gradle ext.deps = [:] def versions = [:] versions.dagger = "2.15" def deps = [:] def dagger = [:] dagger.runtime = "com.google.dagger:dagger$versions.dagger" deps.dagger = dagger ext.deps = deps

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Dependency Management, part 3 ./app/build.gradle ./build.gradle ./versions.gradle

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Dependency Management, part 3 ./build.gradle buildscript { apply from: ‘./versions.gradle' }

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Dependency Management, part 3 ./versions.gradle ./build.gradle ./app/build.gradle

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Dependency Management, part 3 ./app/build.gradle dependencies { implementation deps.dagger.runtime

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WHOA!

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Dependency Management, part 4 ./buildSrc/src/main/java/../Deps.java

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Dependency Management, part 4 ./buildSrc/src/main/java/../Deps.java package com.example.gradle; public class Deps { public static final String guava = "com.google.guava:guava:18.0"; }

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Dependency Management, part 4 ./app/build.gradle import com.example.Deps; dependencies { implementation Deps.guava ./buildSrc/src/main/java/../Deps.java

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Dependency Management, part 5

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Dependency Management, part 5 ./buildSrc/src/main/java/../Deps.kt object Libs { val guava = “com.google.guava:guava:18.0”

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Dependency Management, part 5 ./buildSrc/build.gradle.kts plugins { `kotlin-dsl` } ./buildSrc/src/main/java/../Deps.kt

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Other Constants

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Other Constants ./build.gradle ext { minSdkVersion = 18

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Other Constants ./build.gradle ./versions.gradle def build_versions = [:] build_versions.min_sdk = 14 ext.build_versions = build_versions

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Other Constants ./build.gradle ./versions.gradle ./buildSrc/src/main/java/../Deps.java public class Deps { public static final String minSdk = “14";

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Sharing

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YUM!

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apply plugin: 'kotlin-kapt'

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apply plugin: 'kotlin-kapt' apply from: “./versions.gradle"

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apply from: “./versions.gradle"

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Project Modules App Libraries

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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feature1- domain feature2- domain

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feature1- domain feature2- domain ./f1-domain/ build.gradle dependencies { ... }

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feature1- domain feature2- domain ./f1-domain/ build.gradle dependencies { ... } ./f2-domain/ build.gradle dependencies { ... }

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feature1- domain feature2- domain ./f1-domain/ build.gradle apply from: “/shared- domain.gradle” ./f2-domain/ build.gradle dependencies { ... }

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feature1- domain feature2- domain ./f1-domain/ build.gradle apply from: “/shared- domain.gradle" ./f2-domain/ build.gradle apply from: “/shared- domain.gradle"

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feature1- domain feature2- domain ./shared-domain.gradle dependencies { ... } ./f1-domain/ build.gradle ./f2-domain/ build.gradle

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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feature1- data feature2- data network ./.../build.gradle apply from: “../shared-domain.gradle” apply from: “../shared-data.gradle”

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feature1- data feature2- data network ./.../build.gradle ./shared-data.gradle dependencies { ... }

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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feature1- presentation feature1- data feature2- presentation feature2- data ui-common network ./shared-android.gradle android { ... }

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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App 1 feature1- presentation feature2- presentation App 2 ./shared-variants.gradle android {Ω flavorDimensions “function” productFlavors { ... } }œ configurations { ... }

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App 1 feature1- presentation feature2- presentation App 2 ./shared-variants.gradle android {Ω... flavorDimensions“function”productFlavors{ ... } }œ configurations { ... }

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App 1 feature1- presentation feature2- presentation App 2 ./shared-variants.gradle android {Ω... flavorDimensions“function”productFlavors{ ... } }œ configurations { ... } android.variantFilter { ... }

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App 1 feature1- presentation feature2- presentation App 2 ./shared-variants.gradle android {Ω... flavorDimensions“function”productFlavors{ ... } }œ configurations { ... } android.variantFilter { ... }

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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App 1 App 2 ./shared-apps.gradle android { buildTypes { proguardFiles ... testProguardFile ... } } packagingOptions { ... }

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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App 1 feature1- presentation feature1- data feature2- presentation feature2- data ui-common network App 2 ./shared-test.gradle android { sourceSets { test.java.srcDirs += [“...”] } }

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App 1 feature1- presentation feature1- data feature1- domain feature2- presentation feature2- data feature2- domain ui-common network App 2

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feature1- presentation feature1- data feature1- domain ./shared-feature1-tasks.gradle task cleanReports( type: Delete, group: 'Reports') { description "Delete Repots" delete ‘reportsDirectory' }

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Get Organized!

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Get Organized! ./shard-apps.gradle ./shard-android.gr ./shard-domain.gra ./shard-data.gradle ./shard-variants.gradle

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Get Organized! ./buildscripts/ ./shard-apps.gradle ./shard-android.gradle ./shard-domain.gradle

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Get Organized! ./settings.gradle include ‘:buildscripts’, ... ./buildscripts/ ./shard-apps.gradle

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Renaming

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\ or /

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./app/build.gradle

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./app/app.gradle

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./lib/lib.gradle ./app/app.gradle

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./data/data.gradle ./app/app.gradle ./lib/lib.gradle

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./lib/lib.gradle ./data/data.gradle ./core/core.gradle

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./data/data.gradle ./core/core.gradle ./util/util.gradle

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./settings.gradle rootProject.children.each { subproject -> subproject.buildFileName = “${subproject.name}.gradle" }

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Renaming ! bash script (github)

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Renaming ! bash script (github) ! new modules

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Pitfalls*

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Pitfalls* DON’T DO THIS

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“core” module

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“core” module ! For dependency management?

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“core” module ./module1/module1.gradle dependency { implementation deps.dagger implementation deps.timber implementation reps.rxjava }

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“core” module ./core/core.gradle dependency { api deps.dagger api deps.timber api reps.rxjava }

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App Core Library “core” module ./core/core.gradle

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“core” module ! For dependency management? ! Don’t enlarge the surface!

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“core” module ! For dependency management? ! Don’t enlarge the surface! ! Slower builds

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“core” module ! For dependency management? ! Don’t enlarge the surface! ! Slower builds ! Shared gradle file instead

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Nested Modules

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Nested Modules feature1- presentation feature1- data feature1- domain

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Nested Modules ./feature1 |-feature1-presentation |-feature1-data |-feature1-domain

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Nested Modules ! Slower reloading project

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Nested Modules ! Slower reloading project ! Does not show up in Android view

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Nested Modules ! Slower reloading project ! Does not show up in Android view ! Relative paths

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If you insist…

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1. Git History > mkdir feature1 > git mv feature1-domain ./feature1/ feature1-domain ...

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2. Replace Relative Paths apply from: "../buildscripts/shared- android.gradle"

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2. Replace Relative Paths apply from: "$BUILDSCRIPTS_DIR/shared- test.gradle"

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3. Additional Settings implementation project(“:feature1-data“)

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3. Additional Settings implementation project(“:feature1:feature1-data“)

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3. Additional Settings implementation project(“:feature1-data“) ./settings.gradle include ‘:feature1-data' project (':feature1-data').projectDir = new File('./feature1/feature1-data')

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Resources https://google.github.io/android-gradle-dsl/current/ https://docs.gradle.org/current/dsl/index.html https://gradle.org/releases/ https://gradle.org/guides/ http://www.developerphil.com/ https://developer.android.com/studio/build/optimize-your- build.html
 https://github.com/cliveleehere/multimodulegradle
 Google I/O 2017 “What's New in Android Development Tools”

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Thanks! @CliveLeeHere