Tuesday, November 3, 2015

Create a Scala project using Scala-IDE and SBT on CentOS

This post shows how to create and build a Scala project using  Scala IDE and SBT (Simple Build Tool)

Step 1: Create  a Scala project using Scala IDE

Download, unzip and launch the Scala IDE (link:  http://scala-ide.org/), use the IDE to create a Scala project (said, with a name "ScalaHelloWorld")

Step 2: Install SBT

Download and install SBT using the following command:

> curl https://bintray.com/sbt/rpm/rpm | sudo tee /etc/yum.repos.d/bintray-sbt-rpm.repo
> sudo yum install sbt

Step 3: Configure Scala project for SBT

After installing the SBT, navigate to your "ScalaHelloWorld" root directory and create a build.sbt file in the directory with the following content:

name := "File Searcher"

version := "1.0"

scalaVersion := "2.10.4"

libraryDependencies += "org.scalatest" % "scalatest_2.10" % "2.0" % "test"

Next in the root directory create a folder named "project" and create plugins.sbt file in the created "project" folder, with the following content:

addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "4.0.0")

Now go back to the root directory and in the command line enter the following command:

> sbt eclipse

This will setup the eclipse scala project for sbt to work with. To begin writing Scala implementation, a simple recommendation with to create the folder structures like the following in the "src" folder under the root directory:


Now in the Scala IDE, right-click the folder "src/main/scala" and "src/test/scala" and select "Build Path -> Use as Source Folder", and just create your .scala file in these folders.

Step 4: Run SBT

After you code your scala implementation, navigate to the project root directory and type the following command to run the unit test codes:

> sbt test

And the following command to launch the app in main:

> sbt run

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