Install a language with ASDF through Ansible on Debian

Question

I'd like to write playbooks to install my development environment. Most steps went well, but I'm struggling to install Ruby through asdf.

Playbooks are splitted and called from a main.yaml. The one installing asdf works fine:

---
- hosts: localhost
  connection: local
  gather_facts: yes

  tasks:
    - name: Detects previous installations of asdf
      command: asdf version > /dev/null
      register: asdf_check
      ignore_errors: true

    - name: Download and install asdf
      block:
        - name: Clone asdf repository into ~/.asdf
          ansible.builtin.git:
            name: https://github.com/asdf-vm/asdf.git
            dest: ~/.asdf
            single_branch: yes
            version: v0.14.0

        - name: Insert lines to ~/.bashrc to source asdf
          ansible.builtin.blockinfile:
            path: "/home/{{ unix_username }}/.bashrc"
            block: |
              . "$HOME/.asdf/asdf.sh"
              . "$HOME/.asdf/completions/asdf.bash"

        # Note for superuser post:
        #  I'm not sure to keep this, I added it to try a specific approach described below
        - name: Set execution permissions to asdf.sh (reset later on)
          ansible.builtin.file:
            path: "/home/{{ unix_username }}/.asdf/asdf.sh"
            mode: "744"
            owner: "{{ unix_username }}"
            group: "{{ unix_username }}"
      when: asdf_check.rc > 0

But none of the approach I tried successfully installed Ruby latest version. I tried:

• sourcing ~/.bashrc before calling asdf
• using asdf absolute path
• using bash -lc
• using ansible.builtin.command
• using ansible.builtin.shell

Using ansible.builtin.command, bash -lc and asdf absolute path: task marked as "changed", but does not install anything

  tasks:
    - name: Install asdf ruby plugin
      ansible.builtin.command: "bash -lc '/home/{{ unix_username }}/.asdf/asdf.sh plugin add ruby https://github.com/asdf-vm/asdf-ruby.git'"

    # Other tasks install Ruby latest and register it globally using the same approach

Using ansible.builtin.command, bash -lc and source .bashrc: rc127, asdf: command not found

  tasks:
    - name: Install asdf ruby plugin
      ansible.builtin.command: "bash -lc 'source /home/{{ unix_username }}/.bashrc && asdf plugin add ruby https://github.com/asdf-vm/asdf-ruby.git'"

    # Other tasks install Ruby latest and register it globally using the same approach

Using ansible.builtin.shell and asdf absolute path: rc127, asdf: command not found

  tasks:
    - name: Install asdf ruby plugin
      ansible.builtin.shell:
        executable: /bin/bash
        cmd: "/home/{{ unix_username }}/.asdf/asdf.sh plugin add ruby https://github.com/asdf-vm/asdf-ruby.git"

    # Other tasks install Ruby latest and register it globally using the same approach

Using ansible.builtin.shell and source .bashrc: rc127, asdf: command not found

  tasks:
    - name: Install asdf ruby plugin
      ansible.builtin.shell:
        executable: /bin/bash
        cmd: "source /home/{{ unix_username }}/.bashrc && asdf plugin add ruby https://github.com/asdf-vm/asdf-ruby.git"

    # Other tasks install Ruby latest and register it globally using the same approach

---

Beyond finding a working solution for this task, could you explain why all those approaches failed ?