feat(bootstrap): add desktop environment support with configurable DE, DM, and display target

roles/bootstrap/tasks/_desktop.yml

@@ -0,0 +1,48 @@
+---
+- name: Load desktop package definitions
+  ansible.builtin.include_vars:
+    file: desktop.yml
+
+- name: Resolve desktop packages
+  vars:
+    _de: "{{ system_cfg.features.desktop.environment }}"
+    _family_pkgs: "{{ bootstrap_desktop_packages[os_family] | default({}) }}"
+    _de_config: "{{ _family_pkgs[_de] | default({}) }}"
+  ansible.builtin.set_fact:
+    _desktop_groups: "{{ _de_config.groups | default([]) }}"
+    _desktop_packages: "{{ _de_config.packages | default([]) }}"
+
+- name: Validate desktop environment is supported
+  ansible.builtin.assert:
+    that:
+      - (_desktop_groups | length > 0) or (_desktop_packages | length > 0)
+    fail_msg: >-
+      Desktop environment '{{ system_cfg.features.desktop.environment }}'
+      is not defined for os_family '{{ os_family }}'.
+      Supported: {{ (bootstrap_desktop_packages[os_family] | default({})).keys() | join(', ') }}
+    quiet: true
+
+- name: Install desktop package groups
+  when: _desktop_groups | length > 0
+  ansible.builtin.command: >-
+    {{ chroot_command }} dnf --releasever={{ os_version }}
+    --setopt=install_weak_deps=False group install -y {{ _desktop_groups | join(' ') }}
+  register: _desktop_group_result
+  changed_when: _desktop_group_result.rc == 0
+
+- name: Install desktop packages
+  when: _desktop_packages | length > 0
+  vars:
+    _install_commands:
+      RedHat: >-
+        {{ chroot_command }} dnf --releasever={{ os_version }}
+        --setopt=install_weak_deps=False install -y {{ _desktop_packages | join(' ') }}
+      Debian: >-
+        {{ chroot_command }} apt install -y {{ _desktop_packages | join(' ') }}
+      Archlinux: >-
+        pacstrap /mnt {{ _desktop_packages | join(' ') }}
+      Suse: >-
+        {{ chroot_command }} zypper install -y {{ _desktop_packages | join(' ') }}
+  ansible.builtin.command: "{{ _install_commands[os_family] }}"
+  register: _desktop_pkg_result
+  changed_when: _desktop_pkg_result.rc == 0