default with_items for conditional role includes and check mode

Author: Colin Hoglund

tasks/secure-installation.yml

@@ -23,15 +23,15 @@
   shell: >
     mysql -u root -NBe
     'ALTER USER "{{ mysql_root_username }}"@"{{ item }}" IDENTIFIED WITH mysql_native_password BY "{{ mysql_root_password }}";'
-  with_items: "{{ mysql_root_hosts.stdout_lines }}"
+  with_items: "{{ mysql_root_hosts.stdout_lines | default([]) }}"
   when: ((mysql_install_packages | bool) or mysql_root_password_update) and ('5.7.' in mysql_cli_version.stdout)
 
 # Set root password for MySQL < 5.7.x.
 - name: Update MySQL root password for localhost root account (< 5.7.x).
   shell: >
     mysql -u root -NBe
     'SET PASSWORD FOR "{{ mysql_root_username }}"@"{{ item }}" = PASSWORD("{{ mysql_root_password }}");'
-  with_items: "{{ mysql_root_hosts.stdout_lines }}"
+  with_items: "{{ mysql_root_hosts.stdout_lines | default([]) }}"
   when: ((mysql_install_packages | bool) or mysql_root_password_update) and ('5.7.' not in mysql_cli_version.stdout)
 
 # Has to be after the root password assignment, for idempotency.
@@ -54,7 +54,7 @@
      name: ""
      host: "{{ item }}"
      state: absent
-  with_items: "{{ mysql_anonymous_hosts.stdout_lines }}"
+  with_items: "{{ mysql_anonymous_hosts.stdout_lines | default([]) }}"
 
 - name: Remove MySQL test database.
   mysql_db: "name='test' state=absent"

tasks/setup-Debian.yml

@@ -12,7 +12,7 @@
 
 - name: Ensure MySQL packages are installed.
   apt: "name={{ item }} state=installed"
-  with_items: "{{ mysql_packages }}"
+  with_items: "{{ mysql_packages | default([]) }}"
   register: deb_mysql_install_packages
 
 # Because Ubuntu starts MySQL as part of the install process, we need to stop

tasks/setup-RedHat.yml

@@ -1,7 +1,7 @@
 ---
 - name: Ensure MySQL packages are installed.
   yum: "name={{ item }} state=installed enablerepo={{ mysql_enablerepo }}"
-  with_items: "{{ mysql_packages }}"
+  with_items: "{{ mysql_packages | default([]) }}"
   register: rh_mysql_install_packages
 
 - name: Ensure MySQL Python libraries are installed.