config/roles/dev/tasks/haskell.yml

- name: Download ghcup bootstrap script
  ansible.builtin.uri:
    url: https://get-ghcup.haskell.org
    return_content: true
  register: ghcup_bootstrap

- name: Check if .ghcup present
  ansible.builtin.stat:
    path: '{{ ansible_env.HOME }}/.ghcup'
  register: ghcup_dir

# TODO: detect fish install ??
- name: Install ghcup, stack, lsp server
  ansible.builtin.shell: |
      SHELL='/usr/bin/fish'
      BOOTSTRAP_HASKELL_NONINTERACTIVE=1
      BOOTSTRAP_HASKELL_GHC_VERSION=latest
      BOOTSTRAP_HASKELL_CABAL_VERSION=latest
      BOOTSTRAP_HASKELL_INSTALL_STACK=1
      BOOTSTRAP_HASKELL_INSTALL_HLS=1
      BOOTSTRAP_HASKELL_ADJUST_BASHRC=P
      {{ ghcup_bootstrap.content }}
  args:
    executable: /bin/sh
  changed_when: not ghcup_dir.stat.exists