An ansible playbook script to install elixir on a raspberry pi running Raspbian Wheezy

install-elixir.yml

---
- hosts: all
  remote_user: pi
  tasks:
  - name: check if erlang installed
    shell: which erl
    register: erl_check
    ignore_errors: true

  - apt_repository: repo='deb http://packages.erlang-solutions.com/debian wheezy contrib' state=present
    when: erl_check|failed
    sudo: yes

  - shell: wget http://packages.erlang-solutions.com/debian/erlang_solutions.asc
    when: erl_check|failed

  - shell: sudo apt-key add erlang_solutions.asc && rm erlang_solutions.asc
    when: erl_check|failed

  - apt: name=erlang-mini update_cache=yes
    when: erl_check|failed
    sudo: yes

  - name: check if elixir installed
    shell: elixir -v
    register: elixir_check
    ignore_errors: true

  - name: download kiex for installing elixir
    shell: curl -sSL https://raw.githubusercontent.com/taylor/kiex/master/install | bash -s
    when: elixir_check|failed

  - name: add kiex to path
    lineinfile: dest=~/.bashrc line="PATH=$PATH:~/.kiex/bin"
    lineinfile: dest=~/.bashrc line="test -s \"$HOME/.kiex/scripts/kiex\" && source \"$HOME/.kiex/scripts/kiex\""

  - name: check if elixir-1.0.5 installed
    shell: /home/pi/.kiex/bin/kiex list | grep 1.0.5
    register: elixir_version_check
    ignore_errors: true

  - name: install elixir 1.0.5
    shell: /home/pi/.kiex/bin/kiex install 1.0.5
    when: elixir_version_check|failed

  - name: add kiex source elixir version to path
    lineinfile: dest=~/.bashrc line="source $HOME/.kiex/elixirs/elixir-1.0.5.env"