Added systemd plugin with aliases for systemctl commands.

modules/systemd/init.zsh

@@ -0,0 +1,30 @@
+#
+# Defines systemctl aliases.
+#
+# Authors:
+#   Augusto Rocha Elesbão <aelesbao@gmail.com>
+#
+
+# Return if requirements are not found.
+if (( ! $+commands[systemctl] )); then
+  return 1
+fi
+
+user_commands=(
+  list-units is-active status show help list-unit-files
+  is-enabled list-jobs show-environment
+)
+
+for c in $user_commands; do; alias sc-$c="systemctl $c"; done
+
+unset user_commands
+
+sudo_commands=(
+  start stop reload restart try-restart isolate kill
+  reset-failed enable disable reenable preset mask unmask
+  link load cancel set-environment unset-environment
+)
+
+for c in $sudo_commands; do; alias sc-$c="sudo systemctl $c"; done
+
+unset sudo_commands