Gradle

• Build and dependency management
• default for Android and Kotlin projects
• It supports two languages: groovy and kotlin
• dependency:
  • specific library/artifact found in a remote repository such as Maven Central or Google Maven
• dependency configuration:
  • grouping of dependencies. Common examples include implementation and testImplementation, both made available by the Java plugin.
  • By default Gradle doesn’t come with any dependency configurations.
• group is same as groupId in maven
• module is same as artifactId in maven

Files

• build.gradle
• service/build.gradle
• settings.gradle
• gradle.properties

Gradle Wrapper

• Gradle Wrapper has scripts that can be run on OS:
  • gradlew.sh — *nix OSs
  • gradlew.bat — Windows
• Can be used to install different versions of gradle and define the gradle version for the project

Important Commands

gradle tasks # lists all tasks
gradle -q dependencies # lists all dependencies
gradle build -x test # ignore running test while building 

Plugins

• Java Plugin

plugins {
    id 'java'
}

• Spring boot plugin

plugins {
	id 'org.springframework.boot' version '3.2.3'
}

• Android plugin

plugins {
    id 'com.android.application' version '8.2.2' apply false
    id 'com.android.library' version '8.2.2' apply false
    id 'org.jetbrains.kotlin.android' version '1.9.20' apply false
}

Java plugin

• It is one of the core plugin: https://docs.gradle.org/current/userguide/plugin_reference.html#plugin_reference
• Supported Tasks:
  • compileJava
  • compileTestJava: depends on classes
  • classes
  • testClasses
  • test: depends on testClasses
  • clean
• Dependency between tasks:
  
• Source sets:
  • main
  • test
• Dependency Configurations:
  • implementation
  • compileOnly
  • runtimeOnly etc.
• Dependency configs relationship
  • green: dep. config: we can declare own dependencies
  • grey: dep. config: can’t declare own dependencies. used only by task
  • cyan: task
• main sourceset:
  
• test sourceset: