DevOps Classroom Series – 22/Sept/2020

What is a Build Tool?

• These tool automate building & packaging the software project.

• Activities

  • Compiling source code
  • Packaging Compiled source code into package formats (JAR/EXE/MSI/ZIP/TAR/WAR/dll etc)
  • Dependency Management
  • Releases to Artifact Repository
  • Generating Documentation from source code

• Popular Build Tools

  • Java: Maven, Gradle, Ant
  • DotNet: MsBuild
  • nodejs: Gulp, grunt
  • C/C++: make, cmake, bmake etc..

• When we build the package we get some files/anything they are called as build artifacts

• General Workflow:

  • The basic build workflow

• Building a Java Project:

  1. Lets create a new ec2 instance and install the java and maven

  sudo apt-get update
  sudo apt-get install openjdk-8-jdk maven git -y
  git --version
  mvn --version
  java -version
  

  2. The project which we want to build is Spring pet clinic

  git clone https://github.com/spring-projects/spring-petclinic.git
  cd spring-petclinic
  mvn package
  

  3. As the project grows we need a tool to manage dependencies & simplify build process

Maven Core Concepts

• Basic Workflow
  • For every project create a xml file which is called as POM (Project Object Model)
  • In this xml file we represent resources (code, test code, dependencies)
  • Maven will read pom.xml file and then execute Goals (compile, test, clean, package)

Maven Core advantages

• Maven believes in conventions over configuration.

• Maven has a strong dependency management system. It uses repository based system.

• Maven has a huge central repository hosted Refer here on the internet

• Every machine where maven is installed has a local repository (~/.m2)

• Your organization can opt for remote repository

• Scenario: LT-HMS

  • Our Developers are working on features
  • Once the feature is developed they have to release to the testing team.
  • To deliver the features to the testing team
    1. Deliver Source Code
    2. Deliver the Build Artifacts
    3. Give the URL to start testing.

Next Steps:

• Introduction to maven terms
• Understanding pom.xml
• Understanding repositories
• Maven build phases / life cycle
• Maven plugins