installing `uv` with ansible

I like uv so much I'm using it on servers to deploy random python things. The default instructions are a bit annoying for automation, though, so here's what I do instead:

roles/something/tasks/main.yaml:

- name: Install uv
  become: true
  become_user: "{{ some_user }}"
  become_method: machinectl
  become_exe: 'sudo machinectl'
  vars:
    ansible_ssh_pipelining: no
  block:

    - name: Install uv
      # TODO: make this support upgrades
      ansible.builtin.shell: "curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/uv/releases/download/{{ uv_version }}/uv-installer.sh | sh"
      args:
        creates: "{{ some_path }}/.local/bin/uv"

roles/something/vars/main.yaml:

uv_version: "0.7.6"

As the TODO suggests, this won't upgrade very well - the creates guard means it'll only ever touch this once. I guess an easy answer is to mv the binary to uv-{{ uv_version }} which can force updates, then separately manage a symlink from uv to uv-{{ uv_version }}, but that seems a bit crap. It is also super easy to do, though.

Note, that's a load-bearing ansible_ssh_pipelining: no - without it, you get bizarre errors from Ansible about YAML deserialisation or something. It also needs systemd-container and acl installed so machinectl exists, and ansible can use filesystem ACLs to make a temporary file shared between root and the random user (I think it was that).