ci: Factor out package installation role

tests/image_prep/_container_setup.yml

@@ -22,49 +22,11 @@
 
   roles:
     - role: package_manager
+    - role: packages
     - role: sshd
     - role: sshd_container
 
   tasks:
-    - name: Ensure requisite apt packages are installed
-      apt:
-        name: "{{ common_packages + packages }}"
-        state: present
-        install_recommends: false
-        update_cache: true
-      when: ansible_pkg_mgr == 'apt'
-
-    - name: Ensure requisite yum packages are installed
-      yum:
-        name: "{{ common_packages + packages }}"
-        state: present
-        update_cache: true
-      when: ansible_pkg_mgr == 'yum'
-
-    - name: Ensure requisite dnf packages are installed
-      dnf:
-        name: "{{ common_packages + packages }}"
-        state: present
-        update_cache: true
-      when: ansible_pkg_mgr == 'dnf'
-
-    - name: Clean up package cache
-      vars:
-        clean_command:
-          apt: apt-get clean
-          yum: yum clean all
-          dnf: dnf clean all
-      command: "{{ clean_command[ansible_pkg_mgr] }}"
-      args:
-        warn: "{{ False if ansible_version_major_minor is version('2.10', '<=', strict=True) else omit }}"
-
-    - name: Clean up apt package lists
-      shell: rm -rf {{item}}/*
-      with_items:
-      - /var/cache/apt
-      - /var/lib/apt/lists
-      when: ansible_pkg_mgr == 'apt'
-
     - name: Configure /usr/bin/python
       command: alternatives --set python /usr/bin/python3.8
       args:

tests/image_prep/roles/packages/defaults/main.yml

@@ -0,0 +1,14 @@
+common_packages: []
+packages: []
+
+packages_clean_command:
+    apt: apt-get clean
+    dnf: dnf clean all
+    yum: yum clean all
+
+packages_cleanup_directories:
+    apt:
+      - /var/cache/apt
+      - /var/lib/apt/lists
+    dnf: []
+    yum: []

tests/image_prep/roles/packages/tasks/main.yml

@@ -0,0 +1,35 @@
+- name: Ensure requisite apt packages are installed
+  apt:
+    name: "{{ common_packages + packages }}"
+    state: present
+    install_recommends: false
+    update_cache: true
+  when:
+    - ansible_pkg_mgr == 'apt'
+
+- name: Ensure requisite yum packages are installed
+  yum:
+    name: "{{ common_packages + packages }}"
+    state: present
+    update_cache: true
+  when:
+    - ansible_pkg_mgr == 'yum'
+
+- name: Ensure requisite dnf packages are installed
+  dnf:
+    name: "{{ common_packages + packages }}"
+    state: present
+    update_cache: true
+  when:
+    - ansible_pkg_mgr == 'dnf'
+
+- name: Clean up package cache
+  command:
+    cmd: "{{ packages_clean_command[ansible_pkg_mgr] }}"
+  changed_when: true
+
+- name: Clean up package directories
+  shell:
+    rm -rf {{ item }}/*
+  with_items: "{{ packages_cleanup_directories }}"
+  changed_when: true