- name: setup xen
  gather_facts: no
  hosts: "{{target}}"
  become: "{{become_var}}"
  tasks:

  # todo - split drbd parts into another include
  # todo - allow maintenance mode with rc.local_shutdown

  - name: define required baseline packages
    set_fact:
      baseline_pkgs:
        - bridge-utils
        - brotli         # required by git through http
        - git cyrus-sasl # deploy dnc from git repository
        - libnl3         # required by xen-nox
        - lvm2           # just in case (although we're using zfs)
        - lzo            # required by xen-nox
        - nftables jansson libnftnl iptables libpcap dbus-1 # network convergence
        - pixman         # required by xen-nox /usr/lib/xen/bin/qemu-system-i386

  # todo - less verbose slackpkgs output
  - name: check baseline packages are installed
    ansible.builtin.shell:
      executable: /bin/bash
      cmd: |
        set -e
        for pkgname in {{ baseline_pkgs | join(' ') }}; do
          echo -n $pkgname ...
          if [[ {{ansible_check_mode}} = True ]]; then
            ls /var/log/packages/$pkgname* 2>/dev/null || echo WILL INSTALL IN PLAY
          elif [[ {{ansible_check_mode}} = False ]]; then
            ls /var/log/packages/$pkgname* 2>/dev/null || slackpkg -dialog=off -batch=on -default_answer=y install $pkgname
          fi
        done; unset pkgname
    register: baseline
    changed_when: >
      'WILL INSTALL IN PLAY' in baseline.stdout or
      'Installing package' in baseline.stdout
    check_mode: false

  - debug: var=baseline.stdout
    when: baseline.stdout != ''
  - debug: var=baseline.stderr
    when: baseline.stderr != ''

  - name: download required pre-built sbo packages
    ansible.builtin.get_url:
      url: https://lab.nethence.com/slackpkgs-gonzales.tar
      dest: /root/slackpkgs-gonzales.tar
      force: no

  # todo - handle gonzales archive updates
  - name: install required sbo packages
    ansible.builtin.shell:
      executable: /bin/bash
      cmd: |
        set -e

        if [[ {{ansible_check_mode}} = False && ! -d slackpkgs-gonzales/ ]]; then
          tar xf slackpkgs-gonzales.tar
        fi

        for f in slackpkgs-gonzales/*.tgz; do
          pkgname=${f##*/}
          pkgname=${pkgname%%-*}
          echo -n $pkgname ...
          if [[ {{ansible_check_mode}} = True ]]; then
            ls /var/log/packages/$pkgname* 2>/dev/null || echo WILL INSTALL IN PLAY
          elif [[ {{ansible_check_mode}} = False ]]; then
            ls /var/log/packages/$pkgname* 2>/dev/null || installpkg --terse $f
          fi
        done; unset f

        # check third-party packages are now installed
        if [[ {{ansible_check_mode}} = False ]]; then
          which dsh
          which debootstrap
          ls -lhF /usr/lib64/libfdt.so
          which drbdadm
          which zpool

          [[ -L /boot/xen.gz ]] && ln -sf boot/xen.gz /xen.gz
          ls -lhF /boot/xen*.gz
          ls -lhF /xen.gz

          ls -lhF /usr/lib64/libyajl.so
        fi
    register: sbo
    changed_when: >
      'WILL INSTALL IN PLAY' in sbo.stdout or
      'Installing package' in sbo.stdout
    check_mode: false

  - debug: var=sbo.stdout
    when: sbo.stdout != ''
  - debug: var=sbo.stderr
    when: sbo.stderr != ''

  - name: download xen-compatible linux kernel
    ansible.builtin.get_url:
      url: "{{item}}"
      dest: /
      force: no
    with_items:
      - https://lab.nethence.com/nunux/dom0/{{custom_ver}}.config
      - https://lab.nethence.com/nunux/dom0/{{custom_ver}}.vmlinuz

  - name: download xen-compatible linux kernel modules
    ansible.builtin.get_url:
      url: "{{item}}"
      dest: /lib/modules
      force: no
    with_items:
      - https://lab.nethence.com/nunux/dom0/{{custom_ver}}.modules.tar.gz

  - name: deploy xen+compatible linux kernel
    ansible.builtin.shell:
      executable: /bin/bash
      cmd: |
        set -e

        cd /lib/modules/
        if [[ ! -d {{custom_ver}}/ ]]; then
          tar xzf {{custom_ver}}.modules.tar.gz
          depmod -a {{custom_ver}}
        fi

        cd /
        [[ ! -L vmlinuz ]] && ln -s {{custom_ver}}.vmlinuz vmlinuz

        ls -ldhF /lib/modules/{{custom_ver}}/
        ls -lhF /vmlinuz*
      creates: /vmlinuz
    register: nunux

  - debug: var=nunux.msg
    when: nunux.msg != ''
  - debug: var=nunux.stdout
    when: nunux.stdout != '' 

  #- name: hotfix ll alias
  #  ansible.builtin.blockinfile:
  #    content: |
  #      alias ll='ls -alkF'
  #    dest: /etc/profile