iiab/roles/calibre/tasks/main.yml

# 1. INSTALL THE LATEST CALIBRE 3.X+ (calibre, calibredb, calibre-server etc) ON ALL OS'S

- name: Does /usr/bin/calibre exist?
  stat:
    path: "/usr/bin/calibre"
  register: calib_executable

- name: "Install OS's latest packages: calibre, calibre-bin (IF not rpi AND /usr/bin/calibre MISSING)"
  package:
    name:
      - calibre
      - calibre-bin
    state: latest
  when: internet_available and not is_rpi and (not calib_executable.stat.exists)

- name: Install Calibre .debs IF calibre_via_debs (AND /usr/bin/calibre WAS MISSING)
  include_tasks: debs.yml
  when: calibre_via_debs and (not calib_executable.stat.exists)

- name: Install Calibre via calibre-installer.py IF calibre_via_python (AND /usr/bin/calibre WAS MISSING)
  include_tasks: py-installer.yml
  when: calibre_via_python and (not calib_executable.stat.exists)

# SEE calibre_via_python's value vars/default_vars.yml, vars/ubuntu-18.yml &
# vars/raspbian-9.yml: try to AVOID Python installer on Raspbian since its
# .deb's (http://raspbian.raspberrypi.org/raspbian/pool/main/c/calibre/)
# are updated within about 10 days of Calibre's quasi-monthly releases!
#
# BUT IF ABSOLUTELY NEC: (SEE roles/calibre/tasks/debs.yml)
# - run testing branch for RPi: scripts/calibre-install-latest-rpi.sh
# - run testing branch for Ubuntu 16.04: scripts/calibre-install-latest.sh
# - run unstable branch for Debian etc: scripts/calibre-install-unstable.sh

- name: Create calibre-serve.service and calibre.conf (IF /usr/bin/calibre WAS MISSING)
  template:
    src: "{{ item.src }}"
    dest: "{{ item.dest }}"
    owner: root
    group: root
    mode: "{{ item.mode }}"
    backup: no
  #register: calibre_config
  with_items:
    - { src: 'calibre-serve.service.j2', dest: '/etc/systemd/system/calibre-serve.service', mode: '0644'}
    - { src: 'calibre.conf', dest: '/etc/{{ apache_config_dir }}', mode: '0644'}
  when: (not calib_executable.stat.exists)

- name: Force systemd to reread configs (IF /usr/bin/calibre WAS MISSING)
  systemd:
    daemon_reload: yes
  when: (not calib_executable.stat.exists)
  #when: calibre_config.changed

# 2. STOP CALIBRE SERVICE (REQUIRED FOR DB ACTIVITY...AND IF not calibre_enabled)

#- name: Check if Calibre systemd service exists
#  stat:
#    path: /etc/systemd/system/calibre-serve.service
#  register: calibre_svc

- name: Stop service 'calibre-serve' (/usr/bin/calibre-server by Kovid Goyal)
  systemd:
    name: calibre-serve
    state: stopped
    #enabled: no
  #register: command_result    # gist.github.com/tyrells/0a79681de339237cb04c
  #failed_when: false          # Never Fail during "systemctl stop calibre-serve" (even if service doesn't exist!)
  #when: calibre_svc.stat.exists

# 3. CREATE USER DATABASE

- name: Create /library/calibre (mandatory since Calibre 3.x)
  file:
    path: "{{ calibre_dbpath }}"
    state: directory
    #mode: 0755

- name: Copy template userdb to /library/calibre/users.sqlite (IF /usr/bin/calibre WAS MISSING)
  copy:
    src: /opt/iiab/iiab/roles/calibre/templates/users.sqlite
    dest: "{{ calibre_userdb }}"
    owner: root
    group: root
    mode: 0644
  when: (not calib_executable.stat.exists)

# 4. CREATE CONTENT DATABASE WITH A SAMPLE BOOK (REQUIRED AS OF CALIBRE 3.x)

- name: Does /library/calibre/metadata.db exist?
  stat:
    path: "{{ calibre_dbpath }}/metadata.db"
  register: calibre_db

- name: Create database (required since Calibre 3.x) with a sample book
  include_tasks: create-db.yml
  when: not calibre_db.stat.exists

# 5. WRAP UP: ENABLE CALIBRE SERVICE, http://box/books ETC

# http://box:8080 & http://box:8080/mobile WORK BUT OTHER URL'S LIKE http://box/calibre ARE A MESS (BOOKS RARELY DISPLAY)
#
# 2018-08-27 POSSIBLE FIX...CONSIDER THIS ProxyPass / ProxyPassReverse TECHNIQUE:
# https://github.com/iiab/iiab/tree/master/roles/calibre-web/templates/calibre-web.conf.j2
#    (anyway this works great for calibre-web, allowing http://box/books
#    to work even better than http://box:8083 when box == 192.168.0.x !)
- name: Create symlink calibre.conf from sites-enabled to sites-available, for UNTESTED http://box/calibre etc (debuntu)
  file:
    src: /etc/apache2/sites-available/calibre.conf
    dest: /etc/apache2/sites-enabled/calibre.conf
    state: link
  when: calibre_enabled and is_debuntu

- name: Remove symlink /etc/apache2/sites-enabled/calibre.conf (debuntu)
  file:
    dest: /etc/apache2/sites-enabled/calibre.conf
    state: absent
  when: (not calibre_enabled) and is_debuntu

- name: Enable & Start service 'calibre-serve' (/usr/bin/calibre-server by Kovid Goyal)
  service:
    name: calibre-serve
    enabled: yes
    state: started
  when: calibre_enabled
  #async: 900
  #poll: 5

- name: Reload Apache service ({{ apache_service }})
  systemd:
    name: "{{ apache_service }}"
    state: reloaded

- name: Add 'calibre' variable values to {{ iiab_ini_file }}
  ini_file:
    path: "{{ iiab_ini_file }}"
    section: calibre
    option: "{{ item.option }}"
    value: "{{ item.value }}"
  with_items:
  - option: name
    value: Calibre
  - option: description
    value: '"Calibre is an extremely popular personal library system for e-books."'
  - option: url
    value: "{{ calibre_src_url }}"
  - option: database
    value: "{{ calibre_dbpath }}"
  - option: port
    value: "{{ calibre_port }}"
  - option: calibre_enabled
    value: "{{ calibre_enabled }}"