iiab/roles/nextcloud/tasks/install.yml

# CHECK FOR PHP VERSION AUTOMATICALLY, TO DETERMINE WHICH NEXTCLOUD TO INSTALL.
# INSPIRED BY: github.com/iiab/iiab/blob/master/roles/nodejs/tasks/main.yml

# - name: Try to run 'php -v' to get PHP version
#   # e.g. converts multi-line "PHP 7.0.33-0ubuntu0.16.04.5 (cli) ( NTS ) ..." to "7.0.33"
#   shell: php -v | head -1 | sed 's/^[^0-9.]*//' | sed 's/[^0-9.].*//'
#   register: php_version_installed
#   #ignore_errors: yes    # NOT NEC: if php is not installed, php_version_installed.stdout will get set to ""

# - debug:
#     var: php_version_installed

# # NOTE: this could easily be made to work even if PHP was not installed, e.g.
# # by pre-initializing variable 'php_new' to False here.  But trapping the
# # absence of PHP (below) is a useful software safety precondition!
# #
# #- name: Initialize var 'php_new' to False
# #  set_fact:
# #    php_new: False

# - name: INTENTIONALLY FAIL, IF PHP (Nextcloud prerequisite) ISN'T INSTALLED
#   fail:
#     msg: >
#       Nextcloud install cannot proceed, as it requires PHP be installed first.
#       Note that as of 2019-07-04, IIAB takes care of this by forcing vars
#       mysql_install and mysql_enabled to True in
#       /opt/iiab/iiab/roles/0-init/tasks/main.yml, which in turn forces the
#       installation of PHP in /opt/iiab/iiab/roles/mysql/tasks/main.yml, as
#       invoked by /opt/iiab/iiab/roles/3-base-server/tasks/main.yml
#   when: php_version_installed.stdout == ""

# - name: Set var 'php_new' indicating if installed version of PHP ({{ php_version_installed.stdout }}) >= 7.1, as required by Nextcloud 16
#   set_fact:
#     php_new: "{{ php_version_installed.stdout is version('7.1', '>=') }}"
#     # Ansible's Version Comparison routine:
#     # https://docs.ansible.com/ansible/latest/user_guide/playbooks_tests.html#version-comparison
#   when: php_version_installed.stdout != ""    # i.e. IF ABOVE 'php -v' WORKED

# - debug:
#     var: php_new


# https://docs.nextcloud.com/server/18/admin_manual/installation/source_installation.html#prerequisites-for-manual-installation
- name: Install ffmpeg + libxml2 + 13 php packages
  package:
    name:
      #- dnsutils        # NOT REQUESTED by Nextcloud
      - ffmpeg           # Optional (for preview generation)
      - libxml2          # php-libxml requires libxml2 >= 2.7.0
      #- libapache2-mod-php    # 2020-02-15: NO LONGER NEEDED?
      - php-bz2          # Optional (for extraction of apps)
      #- php-cli         # NOT REQUESTED by Nextcloud
      #- php-common      # NOT REQUESTED by Nextcloud
      - php-curl
      - php-fpm          # ALSO INSTALLED IN roles/www_base (Stage 3) for nginx_high_php_limits
      - php-gd
      - php-gmp          # Optional (for SFTP storage)
      - php-imagick      # Optional (for preview generation)
      - php-intl         # Optional (increases language translation performance and fixes sorting of non-ASCII characters)
      - php-json
      #- php-libxml      # NOT INSTALLABLE: ENABLED BY DEFAULT (https://www.php.net/manual/en/libxml.installation.php)
      - php-mbstring
      - php-mysql 
      #- php-openssl     # NOT INSTALLABLE: ENABLED BY DEFAULT?
      #- php-pdo_mysql   # NOT INSTALLABLE: php-mysql handles this on all OS's?
      #- php-redis       # @m-anish future work?
      #- php-session     # NOT INSTALLABLE: ENABLED BY DEFAULT?
      - php-smbclient    # Optional (SMB/CIFS integration
      - php-xml          # NOT FORMALLY REQUESTED by Nextcloud (BUT hopefully delivers php-simplexml if not {php-xmlreader, php-xmlwriter} on Raspbian?)
      - php-zip
      #- php-zlib        # NOT INSTALLABLE: ENABLED BY DEFAULT?
    state: present

# https://docs.nextcloud.com/server/18/admin_manual/installation/source_installation.html#prerequisites-for-manual-installation
- name: Install 9 additional php packages, if OS is not Raspbian (these are not available on Raspbian on RPi, as of Feb 2020)
  package:
    name:
      - php-ctype
      - php-dom
      - php-exif         # Optional (for image rotation in pictures app)
      - php-fileinfo     # Optional (enhances file analysis performance)
      - php-iconv
      - php-posix
      - php-simplexml
      - php-xmlreader
      - php-xmlwriter
    state: present
  when: not is_raspbian


- name: Create dir {{ nextcloud_root_dir }}
  file:
    state: directory
    path: "{{ nextcloud_root_dir }}"    # /library/www/nextcloud

- name: Unarchive {{ nextcloud_dl_url }} to {{ nextcloud_root_dir }} ({{ apache_user }}:{{ apache_user }})
  unarchive:
    remote_src: yes
    src: "{{ nextcloud_dl_url }}"
    #dest: "{{ nextcloud_base_dir }}"    # /library/www
    dest: "{{ nextcloud_root_dir }}"     # /library/www/nextcloud
    owner: "{{ apache_user }}"           # apache2 on debuntu
    group: "{{ apache_user }}"
    extra_opts: --strip-components=1     # Or use 'dest: /library/www' above
  when: internet_available

- name: Provision Nextcloud's MySQL DB, run Nextcloud's install wizard, etc
  include_tasks: setup.yml

- name: Install /etc/{{ apache_conf_dir }}/nextcloud.conf from template, for http://box{{ nextcloud_url }}    # http://box/nextcloud
  template:
    src: nextcloud.conf.j2
    dest: "/etc/{{ apache_conf_dir }}/nextcloud.conf"    # apache2/sites-available on debuntu
  when: apache_install | bool


# RECORD Nextcloud AS INSTALLED

- name: "Set 'nextcloud_installed: True'"
  set_fact:
    nextcloud_installed: True

- name: "Add 'nextcloud_installed: True' to {{ iiab_state_file }}"
  lineinfile:
    path: "{{ iiab_state_file }}"    # /etc/iiab/iiab_state.yml
    regexp: '^nextcloud_installed'
    line: 'nextcloud_installed: True'