Ansible Phoenix deployment playbook

deploy.yml

---
# ansible 2.9.0
- name: Deploy to production
  hosts: production
  remote_user: user

  vars:
    app_root: /home/user/apps/my_app

  tasks:
    - name: Initialize the deploy directory
      deploy_helper:
        path: '{{ app_root }}'

    - name: Clone the project to the new release folder
      git:
        repo: git@github.com:me/my_app.git
        dest: '{{ deploy_helper.new_release_path }}'
        version: master

    - name: Add an unfinished file, to allow cleanup on successful finalize
      file:
        path: '{{ deploy_helper.new_release_path }}/{{ deploy_helper.unfinished_filename }}'
        state: touch

    - name: Build release
      shell:
        cmd: '{{ item }}'
        chdir: '{{ deploy_helper.new_release_path }}/'
      with_items:
        - mix deps.get --only prod
        - export $(cat {{ deploy_helper.shared_path }}/environment | xargs) && mix release
      environment:
        PATH: "{{ ansible_env.PATH }}:/home/deployer/.asdf/shims"

    - name: Migrate app
      shell:
        cmd: '{{ deploy_helper.new_release_path }}/_build/prod/rel/my_app/bin/my_app eval "MyApp.Release.migrate"'

    - name: Finalize the deploy, removing the unfinished file and switching the symlink
      deploy_helper:
        path: '{{ app_root }}'
        release: '{{ deploy_helper.new_release }}'
        state: finalize

    - name: Restart app
      systemd:
        name: my_app
        state: restarted
      become: yes