# Ansible playbook to install latest Golang using godeb on Debian system
# ansible-playbook latest-golang.yml -K
---

- hosts: all
  vars:
    remote_user: alkemic
  user: "{{ remote_user }}"
  tasks:
    - name: Setup GOPATH in ~/.profile
      lineinfile: >
        dest=/home/{{ remote_user }}/.profile
        create=yes
        line="{{ item }}"
      with_items:
        - 'export GOPATH=/home/{{ remote_user }}/projects/go'
        - 'export PATH=$PATH:$GOPATH/bin'

    - name: Check if golang is installed
      command: which go
      register: go_check
      ignore_errors: True

    - name: Check if godeb is installed
      command: which godeb
      register: godeb_check
      ignore_errors: True

    - name: Install golang if missing
      become: yes
      apt:
        name: golang
      when: go_check.rc == 1

    - name: Install git
      become: yes
      apt:
        name: git

    - name: Install godeb if missing
      become: no
      shell: . /home/{{ remote_user }}/.profile && go get gopkg.in/niemeyer/godeb.v1/cmd/godeb
      when: godeb_check.rc == 1

    - shell: go version | sed -n -e 's/^go version go\\(.*\\) linux\\/.*$/\\1/p'
      register: go_version

    - shell: . /home/{{ remote_user }}/.profile && godeb list | head -1
      register: go_latest_version

    - debug: msg="{{ go_latest_version.stdout }} - {{ go_version.stdout}}"

    - name: Update Go
      become: no
      shell: . /home/{{ remote_user }}/.profile && godeb install
      when: go_latest_version.stdout != go_version.stdout

    - name: Install golang if missing
      become: yes
      apt:
        name: golang
        state: absent