Simple Example

$ vi build.gradle

task helloWorld {
  
  doLast {
    println "Hellow World"   <-- groovy
  }

}

Run it

$ gradle hellowWorld

Create the Wrapper

Issue the following command to create the wrapper

$ gradle wrapper

Store the wrapper with your source code

build.gradle

settings.gradle

Example settings.gradle file

rootProject.name = "starter-example"

gradle.properties

Example gradle.properties file

org.gradle.logging.level = info
version = 1.0.0

Use the variable in your build.gradle file like so:

task helloWorld {
  
  doLast {
    println "Hellow World, version = " + version
  }

}

Task Dependencies

We can add dependsOn to the task to make it depend on the other.

task copyDocs(type: Copy) {
  from "src"
  into "build/docs"
  include "**/*.md"
  includeEmptyDir = false
}

task createZip(type: Zip) {
  from "build/docs"
  archiveFilename = "docs.zip"
  destinationDirectory = file("build/dist")
  dependsOn copyDocs
}

To see the order without executing the tasks, add --dry-run to the end.

$ gradle hellowWorld --dry-run

Another way to visualize the gradle tree you can use gradle-task-tree.

See https://github.com/dorongold/gradle-task-tree

Tasks

List all available tasks

$ gradle tasks --all

Copy Task

task copyDocs(type: Copy) {
  from "src"
  into "build/docs"
  include "**/*.md"
  includeEmptyDir = false
}

Zip

task createZip(type: Zip) {
  from "build/docs"
  archiveFilename = "docs.zip"
  destinationDirectory = file("build/dist")
}

Lifecycle Phases

Initialization Phase

• evaluates settings file and sets up build

Configuration Phase

• evaluates build scripts and runs configuration logic.

Execution Phase

• executes task actions in correct order.

Configuration Logic

Execution Logic

Dependencies

web-service/build.gradle

dependencies {
    implementation project(':utils')
    implementation project(':api')
}

References