---
- name: "Install | install Singularity"
  tags: singularity
  block:
    - name: "Install | get the installed Singularity version"
      tags: singularity
      register: singularity_deb_installed_version
      changed_when: false
      ansible.builtin.command:
        cmd: singularity --version

    - name: "Install | assert installed version correctness"
      tags: singularity
      vars:
        installed: "{{ singularity_deb_installed_version.stdout }}"
        expected: "singularity-ce version {{ singularity_deb_version }}-{{ singularity_deb_os_name }}"
      ansible.builtin.assert:
        that: installed == expected
        success_msg: "Expected version already present: '{{ installed }}'"
        fail_msg: "Found unexpected Singularity version: '{{ installed }}'"

  rescue:
    - name: "Install | download GitHub release .deb"
      tags: singularity
      vars:
        baseurl: "github.com/sylabs/singularity/releases/download"
        singver: "{{ singularity_deb_version }}"
        osname: "{{ singularity_deb_os_name }}"
      ansible.builtin.get_url:
        url: "https://{{ baseurl }}/v{{ singver }}/singularity-ce_{{ singver }}-{{ osname }}_amd64.deb"
        dest: "/tmp/singularity.deb"
        mode: "0644"

    - name: "Install | install downloaded package"
      tags: singularity
      ansible.builtin.apt:
        deb: "/tmp/singularity.deb"

    - name: "Install | clean up the .deb artifact"
      tags: singularity
      ansible.builtin.file:
        path: "/tmp/singularity.deb"
        state: absent