First steps

Before we run the first helloworld example we need to setup some stuff. You can skip to the Running helloworld below if you have scala and sbt already setup.

Needed software

The following is how my setup is on a *nix/osx. For windows I am clueless but I am sure we can work out something at the meetup.

Scala

Download 2.9.1. Installation is as easy as unpacking it. My scala lives under /opt -- you might have another suitable place for it. A great thing to do is to soft link scala -> scala-2.9.1.final/. After that export the correct path (assuming you created the soft link):

> export PATH = $PATH:/opt/scala/bin  

After that you should be able to invoke scala from anywhere at the command-line for some Scala REPL goodness.

Simple Build Tool

Install sbt.

My setup includes a ~/bin directory that is in my PATH. In there I have a sbt-launch-0.11.2.jar and a script sbt11 that goes

#!/bin/sh
if test -f ~/.sbtconfig; then
  . ~/.sbtconfig
fi
echo $SBT_OPTS

java  ${SBT_OPTS} -jar `dirname $0`/sbt-launch-0.11.2.jar "$@"

The ~/.sbtconfig file is:

export SBT_OPTS="-Dfile.encoding=UTF8 -Xms1024m -Xmx1024m  -Xss1M -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=256m -Dsbt.boot.directory=$HOME/.sbt/boot/"

Create a directory:

> mkdir ~/.sbt

We will cover plugins for sbt at the meetup.

Git

Download and install git.

Running Helloworld

Checkout helloworld

> git clone https://github.com/ppurang/bbscala
> cd bbscala/00000_meetup/helloworld
> sbt11
-Dfile.encoding=UTF8 -Xms1024m -Xmx1024m -Xss1M -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=256m -Dsbt.boot.directory=/home/ppurang/.sbt/boot/
[info] Set current project to helloworld (in build file:/home/ppurang/repositories/github/meri/bbscala/00000_meetup/helloworld/)

Ready to run our first scala program:

> run
[info] Running HelloWorld 
Hello World!
[success] Total time: 0 s, completed Dec 4, 2011 9:52:23 AM

Congrats your setup clicked. And don't worry if things weren't as successful - that is one of the reasons why we meet.

IDE

I would recommend Intellij Community Edition with the scala plugin. Here is a good writeup on setting up your intellij and other IDEs:

https://github.com/coreyhaines/coderetreat/tree/master/starting_points/scala

Create a github account

In case you don't have one do create one. Another great place is https://bitbucket.org/.