feat[flags] Added backup functionality

src/flags.lisp

@@ -44,3 +44,16 @@
                      :manual "Add SETTING (an expression in the form Option=value) to the .system file being operated on. Multiple SETTINGs can be set by giving this option multiple times. Use 'Option=nil' to revoke a setting."
                      :initial-value nil
                      :reduce (adopt:flip #'cons)))
+
+
+(defparameter *option-backup*
+  (adopt:make-option 'backup
+                     :parameter "LOCATION"
+                     :long "backup"
+                     :short #\b
+                     :help "Back up file to LOCATION before editing."
+                     :manual "Back up FILE to LOCATION before editiong. If no LOCATION is given, default to backing up at ./.service-backup"
+                     :initial-value nil
+                     :reduce (lambda (prev new)
+                               (declare (ignore prev))
+                               new)))

src/main.lisp

@@ -36,6 +36,7 @@
           (adopt:exit))
         (run (first arguments)
              :direct-settings (gethash 'setting options)
-             :secure (gethash 'secure options)))
+             :secure (gethash 'secure options)
+             :backup (gethash 'backup options)))
     (error (c)
       (adopt:print-error-and-exit c))))

src/ui.lisp

@@ -33,4 +33,5 @@
               *option-help*
               *option-secure*
               *option-version*
-              *option-setting*)))
+              *option-setting*
+              *option-backup*)))

test/test.service

@@ -22,5 +22,3 @@ NewBinding=Yes
 [Install]
 Alias=dbus.service
 
-ervice
-