gistfile1.txt

$ pwd
/home/dan/foo

$ tree
   .
   |-group_vars
   |-roles
   |---foo
   |-----meta

$ cat roles/foo/meta/main.yml
---
  dependencies:
    - { role: openjdk, java_version: 7 }

$ cat playbook
---
- hosts: all
  vars: 
    foo_dir: /root/foo
    bar_dir: /root/foo/bar

  tasks:

    - name: make foo directory
      file: path={{ foo_dir }} state=directory

    - name: download bar
      get_url: dest={{ foo_dir }} url=https://example.com/bar.tar.gz

    - name: extract bar
      command: chdir={{ foo_dir }} tar xzf bar.tar.gz

    - name: get conf file
      get_url: dest={{ bar_dir }} url=https://gist.githubusercontent.com/novodinia/234mzdf/raw/ou34m34/file.conf
 
    - name: launch bar
      command: chdir={{ bar_dir }} ./bin/bar --conf file.conf