tasks/main.yml

---
    - name: Install git
      apt: pkg=git state=latest
      register: git_check

    - name: Install curl
      apt: pkg=curl state=latest
      register: curl_check

    - name: check if erlang installed
      shell: which erl
      register: erl_check
      ignore_errors: true

    - name: Install erl
      apt: pkg=erlang state=latest
      when: erl_check|failed
      register: erlinstalled

    - name: Check user "{{ user }}"
      shell: cat /etc/passwd | grep -w "{{ user }}"
      register: usercheck
      ignore_errors: true

    - name: Add user  "{{ user }}"
      user: name="{{ user }}" password="{{ password }}"
      when: usercheck|failed

    - name: check if kiex installed for user "{{ user }}"
      shell: /home/"{{ user }}"/.kiex/bin/kiex | grep "kiex commands"
      register: kiex_check
      when: (git_check|success and curl_check|success and erl_check|success) or (git_check|success and curl_check|success and erlinstalled|success)
      ignore_errors: true
      become: true
      become_user: "{{ user }}"

    - name: check if elixir installed for user "{{ user }}"
      shell: /home/"{{ user }}"/.kiex/bin/kiex list | grep "{{ ver }}"
      register: elixir_check
      ignore_errors: true
      become: true
      become_user: "{{ user }}"

    - name: download kiex for installing elixir for user "{{ user }}"
      shell: curl -sSL https://raw.githubusercontent.com/taylor/kiex/master/install | bash -s
      when: kiex_check|failed
      register: kiex_check1
      become: true
      become_user: "{{ user }}"

    - name: add kiex to path1
      lineinfile: dest=~/.bashrc line="PATH=$PATH:~/.kiex/bin"
      when: kiex_check1|success
      register: kiex_check2
      become: true
      become_user: "{{ user }}"

    - name: add kiex to path2
      lineinfile: dest=~/.bashrc line="test -s \"$HOME/.kiex/scripts/kiex\" && source \"$HOME/.kiex/scripts/kiex\""
      when: kiex_check2|success
      register: kiex_check
      become: true
      become_user: "{{ user }}"

    - name: install elixir {{ ver }} for user "{{ user }}"
      shell: /home/"{{ user }}"/.kiex/bin/kiex install {{ ver }}
      when: elixir_check|failed and kiex_check|success
      become: true
      become_user: "{{ user }}"

vars/main.yml

---
    #user to cher and create
    user: someuser38
    # elixir version to check and install
    ver: 1.5.2
    # user pass  -   to create pass use makepasswd --crypt-md5 --clearfrom -
    password: $1$gjwtjW0E$ypvfE/Wns2uVNSBYKAfHd1