Details a bit more the Erlang environment setup documentation

# 1.5. Setup Erlang Environment

# 1.5. Setup Erlang Environment

First we need to install Erlang. There is multiple way, for development we will be using asdf.

First we need to install Erlang. There is multiple way, for development we will

be using *ASDF*, a tool that allows the installation of multiple version of Erlang

at the same time, and switch from one version to the other at will.

## 1.5.1. Setup Erlang using asdf

## 1.5.1. Setup Erlang using asdf

    sudo apt install curl git autoconf libncurses-dev build-essential m4 libssl-dev 

    sudo apt install curl git autoconf libncurses-dev build-essential m4 libssl-dev 

Download asdf:

Download *ASDF* tool to the local account:

    git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.10.2

    git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.10.2

Make asdf activate on login by adding these lines at the end of the `~/.bashrc` file:

Make *ASDF* activate on login by adding these lines at the end of the `~/.bashrc` file:

    . $HOME/.asdf/asdf.sh

    . $HOME/.asdf/asdf.sh

    . $HOME/.asdf/completions/asdf.bash

    . $HOME/.asdf/completions/asdf.bash

Logout and log back in to activate asdf.

Logout and log back in to activate *ASDF*.

Install asdf plugin for Erlang:

*ASDF* supports multiple tools by installing there corresponding plugins.

Install *ASDF* plugin for Erlang:

    asdf plugin add erlang https://github.com/asdf-vm/asdf-erlang.git

    asdf plugin add erlang https://github.com/asdf-vm/asdf-erlang.git

Install Erlang:

Install a version of Erlang:

    asdf install erlang 24.3.4.2

    asdf install erlang 24.3.4.2

Activate Erlang locally for TFS controller:

Activate Erlang locally for TFS controller. This will create a local file

called `.tool-versions` defining which version of the tools to use when

running under the current directory:

    cd tfs-ctrl/

    cd tfs-ctrl/

    asdf local erlang 24.3.4.2

    asdf local erlang 24.3.4.2

Install rebar3:

Erlang projects uses a build tool called rebar3. It is used to manager project

dependenecies, compile a project and generate project releases.

Install rebar3 localy from source:

    cd ~

    cd ~

    git clone https://github.com/erlang/rebar3.git

    git clone https://github.com/erlang/rebar3.git

# 2.6. Traffic Engineering Demo (PENDING)

# 2.6. Traffic Engineering Demo (WIP)

## Setup Test-Bed

## Setup Test-Bed