parasbhayani / cicd-pipeline-demo

CI-CD pipeline - Gradle

• A gradle build is defined in a groovy script called build.gradle, and is under the root directory of your project dir

• We use gradle init command to initialize new project, and this sets the gradle wrapper too

  gradle init
  

  Starting a Gradle Daemon, 1 incompatible Daemon could not be reused, use --status for details
  
  Select type of project to generate:
  1: basic
  2: application
  3: library
  4: Gradle plugin
  Enter selection (default: basic) [1..4] 1
  
  Select build script DSL:
  1: Groovy
  2: Kotlin
  Enter selection (default: Groovy) [1..2] 1
  
  Project name (default: cicd-pipeline-demo): 
  
  
  > Task :init
  Get more help with your project: Learn more about Gradle by exploring our samples at https://docs.gradle.org/7.1.1/samples
  
  BUILD SUCCESSFUL in 28s
  2 actionable tasks: 2 executed
  

• Gradle build file has tasks, which you can call from CLI

  ./gradlew sampleTask1 sampleTask2
  

• This command will run both the tasks

• Example task,

  task myTask {
      printIn 'Hello World!'
  }
  

• Most tasks can be accomplished by getting plugins, the plugins can be explored here Gradle plugin

• Gradle tasks can have dependencies on one-another, which can be explictly defined using dependsOn property in your build.gradle file

• In our sample build file we are using dependency between tasks, where-in Task2 is dependent on Task1

• So when Task2 is run via gradle wrapper as below, you can notice output which also runs Task1

  ./gradlew Task2
  

  > Task :Task1
  Hello, World!
  
  > Task :Task2
  Welcome to Gradle
  
  BUILD SUCCESSFUL in 1s
  2 actionable tasks: 2 executed