# How to Contribute

## Setting up tools

### 1. Getting Git

To install git in Linux-like systems you can do it via your native package management system:

    $ yum install git

or:

    $ sudo apt-get install git

In both Mac 10.4 and 10.5, you can install Git via MacPorts

    $ sudo port install git

For Windows, install git from here [http://msysgit.github.io/](http://msysgit.github.io/)


### 2. Getting sbt

### Linux

1. Download sbt from here: [http://scalasbt.artifactoryonline.com/scalasbt/sbt-native-packages/org/scala-sbt/sbt/0.12.2/sbt.tgz](http://scalasbt.artifactoryonline.com/scalasbt/sbt-native-packages/org/scala-sbt/sbt/0.12.2/sbt.tgz)
2. Unpack the archive to a directory of your choice
3. Add the `bin/` directory to the `PATH` environment variable. Open the file `~/.bashrc` in an editor (create it if it doesn’t exist) and add the following line `export PATH=/PATH/TO/YOUR/sbt/bin:$PATH`

Verify that `sbt` is installed correctly: Open a new terminal (to apply the changed `.bashrc`) and type `sbt -h`, you should see a help message from `sbt`.

### Mac OS X

If you use the homebrew package manager, simply type `brew update` and then `brew install sbt` in a Terminal prompt.

Otherwise, install `sbt` by following these steps:

1. Download sbt from here: [http://scalasbt.artifactoryonline.com/scalasbt/sbt-native-packages/org/scala-sbt/sbt/0.12.2/sbt.tgz](http://scalasbt.artifactoryonline.com/scalasbt/sbt-native-packages/org/scala-sbt/sbt/0.12.2/sbt.tgz)
2. Unpack the archive to a directory of your choice
3. Add the `bin/` directory to the `PATH` environment variable. Open the file `~/.bash_profile` in an editor (create it if it doesn’t exist) and add the following line `export PATH=/PATH/TO/YOUR/sbt/bin:$PATH`

Verify that `sbt` is installed correctly: Open a new terminal (to apply the changed `.bashrc`) and type `sbt -h`, you should see a help message from `sbt`. 

### Windows

1. Download the sbt installer from here: http://scalasbt.artifactoryonline.com/scalasbt/sbt-native-packages/org/scala-sbt/sbt/0.12.2/sbt.msi
2. Run the installer

Verify that `sbt` is installed correctly: open the Command Prompt and type `sbt sbt-version`, you should see the version number of `sbt`. 

If you have problems installing sbt, ask for help on the mailing list or on our IRC channel at #spire-math on _freenode_.