base: Refactor export mount fact

roles/base/files/export.fact.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+set -eu
+
+if mount | grep -qE "on /export" ; then
+    echo "true"
+else
+    echo "false"
+fi

roles/base/tasks/main.yml

@@ -33,13 +33,7 @@
 - name: Add ansible_export fact
   ansible.builtin.copy:
     dest: /etc/ansible/facts.d/export.fact
-    content: |
-      #!/bin/sh
-      if [ -d /export ]; then
-          echo "true"
-      else
-          echo "false"
-      fi
+    src: export.fact.sh
     mode: "0755"
     owner: root
     group: "{{ ansible_wheel }}"