---
# pre installation tasks
# ======================

- name: check var anaconda_state
  fail:
    msg: "anaconda_state '{{ anaconda_state }}' not supported. Use 'present' or 'absent'."
  when: anaconda_state != "present" and anaconda_state != "absent"

- block:

  - name: ensure home dir exists
    file:
      dest: "{{ anaconda_home_dir }}"
      state: directory

  - name: download installer file exists
    get_url:
      url: "{{ anaconda_installer_uri }}"
      dest: "{{ anaconda_home_dir }}/installer.sh"
      checksum: "md5:{{ anaconda_installer_md5 }}"
    register: installer_file

  - name: write warning into Anaconda home dir
    copy:
      dest: "{{ anaconda_home_dir }}/do_not_touch_installer.sh.txt"
      content: |
        Do not touch the installer.sh file because ansible uses
        it to decide if a reinstallation (uninstall/install) is
        necessary.

  - name: check if Anaconda is already installed
    stat:
      path: "{{ anaconda_install_dir }}/bin/conda"
    register: conda_binary

  when: "anaconda_state == 'present'"

  rescue:
    - name: failed to prepare installation
      fail:
        msg: "leave installed Anaconda (if any) untouched, installer file may be changed"

# uninstall
# =========
# if the installer file changes, we assume a new version should be installed
# (the Anaconda way recommend a 'conda update' or similar instead of a new
# installation but we won't to that here to kiss)
- include: remove.yml
  when: (installer_file|changed and conda_binary.stat.exists) or anaconda_state == 'absent'


# install
# =======
- block:

  - name: run installer
    command: "bash installer.sh -b -p {{ anaconda_install_dir }} {{ anaconda_force_install|ternary('-f', '') }}"
    args:
      chdir: "{{ anaconda_home_dir }}"
    failed_when: false
    register: installer_out

  - name: fail if installer finished unsuccessfully
    fail:
      msg: "{{ installer_out.stderr }}"
    when: "not (('ERROR: File or directory already exists' in installer_out.stderr) or ('installation finished.' in installer_out.stdout))"

  when: "anaconda_state == 'present' and (installer_file|changed or anaconda_force_install)"

  rescue:
    - name: rollback installation
      include: remove.yml
    - fail: msg="Installation failed! Rolled back installation!"

# post install tasks
# ==================
- name: set path to anaconda
  lineinfile:
    dest: "{{ item }}"
    create: true
    state: present
    insertafter: EOF
    line: 'export PATH="{{ anaconda_install_dir }}/bin:$PATH"'
  with_items:
    - /etc/bash.bashrc.local
    - /etc/ksh.kshrc.local
    - /etc/zsh.zshrc.local
    - /etc/ash.ashrc.local
  when: "anaconda_state == 'present' and anaconda_set_path|bool"