SBT Quick start - Part 1

Now that I have Scala and SBT working from GitBash we will setup our first demo project.

$ mkdir demo
$ cd demo
$ mkdir -p src/{main,test}/{java,scala,resources}

Create a script hw.scala and place it under demo/src/scala

/*********** hw.scala ***************/
object Hi {
  def main(args: Array[String]) = println("Demo application says HELLO!")
}

now run sbt -> Running sbt with no command line arguments starts it in interactive mode.

nxp10009@NXL01366 /c/workspaces/pelssers/demo
$ sbt
[info] Set current project to default-8388aa (in build file:/C:/workspaces/pelssers/demo/)
> exit  

We still have to create a build.sbt in the project root so let's do this first

name := "demo"

version := "1.0-SNAPSHOT"

scalaVersion := "2.9.2"

If we now rerun sbt again everything seems ok

$ sbt
[info] Set current project to demo (in build file:/C:/workspaces/pelssers/demo/)
> exit

You will now see sbt created a project folder for you. Here we will create a new build.properties file

nxp10009@NXL01366 /c/workspaces/pelssers/demo
$ ls -la
total 3
drwxr-xr-x    6 nxp10009 Administ        0 Dec  9 15:13 .
drwxr-xr-x    8 nxp10009 Administ     4096 Dec  9 15:04 ..
-rw-r--r--    1 nxp10009 Administ       70 Dec  9 15:04 build.sbt
drwxr-xr-x    3 nxp10009 Administ        0 Dec  9 15:13 project
drwxr-xr-x    4 nxp10009 Administ        0 Dec  9 15:05 src
drwxr-xr-x    3 nxp10009 Administ        0 Dec  9 15:12 target

$ cd project
$ vi build.properties

sbt.version=0.12.0

Enabling continous build and test

> ~ compile
[success] Total time: 0 s, completed Dec 9, 2012 3:32:39 PM
1. Waiting for source changes... (press enter to interrupt)

Now edit the hw.scala and make a little change:
object Hi {
  def main(args: Array[String]) = println("Demo application says HELLO again!")
}

[info] Compiling 1 Scala source to C:\workspaces\pelssers\demo\target\scala-2.9.2\classes...
[success] Total time: 1 s, completed Dec 9, 2012 3:33:02 PM
2. Waiting for source changes... (press enter to interrupt)