Normalize user-facing defaults

roles/partitioning/tasks/main.yml

@@ -1,8 +1,8 @@
 ---
 - name: Detect system memory for swap sizing
   when:
-    - partitioning_vm_memory is not defined
-    - vm_memory is not defined
+    - (partitioning_vm_memory | float) <= 0
+    - (vm_memory | float) <= 0
   block:
     - name: Read system memory
       ansible.builtin.command: awk '/MemTotal/ {print int($2/1024)}' /proc/meminfo
@@ -17,9 +17,9 @@
 - name: Set partitioning vm_size for physical installs
   when:
     - install_type == "physical"
-    - partitioning_vm_size is not defined
-    - vm_size is not defined
-    - install_drive is defined
+    - (partitioning_vm_size | float) <= 0
+    - (vm_size | float) <= 0
+    - install_drive | length > 0
   block:
     - name: Detect install drive size
       ansible.builtin.command: "lsblk -b -dn -o SIZE {{ install_drive }}"
@@ -157,7 +157,7 @@
   when: partitioning_luks_enabled | bool
   vars:
     partitioning_luks_passphrase_effective: >-
-      {{ (partitioning_luks_passphrase | default(luks_passphrase | default(''))) | string }}
+      {{ partitioning_luks_passphrase | string }}
   block:
     - name: Validate LUKS passphrase
       ansible.builtin.assert:
@@ -207,7 +207,7 @@
             state: opened
             name: "{{ partitioning_luks_mapper_name }}"
             passphrase: "{{ partitioning_luks_passphrase_effective }}"
-            allow_discards: "{{ 'discard' in (partitioning_luks_options | default('') | lower) }}"
+            allow_discards: "{{ 'discard' in (partitioning_luks_options | lower) }}"
           register: partitioning_luks_open_result
           no_log: true
       rescue:
@@ -235,7 +235,7 @@
             state: opened
             name: "{{ partitioning_luks_mapper_name }}"
             passphrase: "{{ partitioning_luks_passphrase_effective }}"
-            allow_discards: "{{ 'discard' in (partitioning_luks_options | default('') | lower) }}"
+            allow_discards: "{{ 'discard' in (partitioning_luks_options | lower) }}"
           register: partitioning_luks_open_retry
           no_log: true