refactor ♻️: Refactor ExecStart to use a list for commands and conditionally execute them.

This refactoring involves restructuring the `ExecStart` method to utilize a list of commands instead of a single string. This change allows for more flexible execution based on certain conditions, enhancing the modularity and maintainability of the code.

templates/90-wol.rules.j2

@@ -0,0 +1,3 @@
+{% for interface in wol_final_interfaces %}
+ACTION=="add", SUBSYSTEM=="net", KERNEL=="{{ interface }}", RUN+="/sbin/ethtool -s {{ interface }} wol {{ wol_mode }}"
+{% endfor %}

templates/wol-interfaces.service.j2

@@ -5,8 +5,13 @@ Wants=network.target
 
 [Service]
 Type=oneshot
-ExecStart=/bin/bash -c '{% for intf, enabled, supported in en_interfaces | zip(wol_enabled.results, wol_supported.results) %}
-{% if wol_mode in supported.stdout and wol_mode not in enabled.stdout %}/sbin/ethtool -s {{ intf }} wol {{ wol_mode }}; {% endif %}{% endfor %}'
+ExecStart=/bin/bash -c '{% set cmds = [] %}
+{% for intf, enabled, supported in en_interfaces | zip(wol_enabled.results, wol_supported.results) %}
+{% if wol_mode in supported.stdout and wol_mode not in enabled.stdout %}
+{% set _ = cmds.append("/sbin/ethtool -s " ~ intf ~ " wol " ~ wol_mode) %}
+{% endif %}
+{% endfor %}
+{{ cmds | join("; ") if cmds | length > 0 else ":" }}'
 RemainAfterExit=yes
 
 [Install]