Allow del command to keep payload inside repository

new option --preserve, -p is added

bin/is

@@ -163,7 +163,7 @@ def c_del(parser, args):
                                                              repo.config.name))
             if not confirm():
                 raise Exception("Aborted!")
-        repo.delete(img.name, img.version)
+        repo.delete(img.name, img.version, payloads=not args.preserve)
 
 def c_diff(parser, args):
     '''
@@ -412,6 +412,8 @@ p_del.add_argument("-b", "--best", action="store_true", default=False,
                    help="in best mode, image is the most recent in all repositories")
 p_del.add_argument("-f", "--force", action="store_true", default=False,
                    help="delete image without confirmation")
+p_del.add_argument("-p", "--preserve", action="store_true", default=False,
+                   help="preserve payloads. doesn't remove it from repository")
 p_del.set_defaults(func=c_del)
 
 # diff command parser

completion/bash/is

@@ -79,7 +79,7 @@ _is() {
 	    (( args > 2 )) && _image && _repo
             ;;
 	del)
-            [[ "$cur" == -* ]] && _opt '-h --help -b --best -f --force' && return 0
+            [[ "$cur" == -* ]] && _opt '-h --help -b --best -f --force -p --preserve' && return 0
             _image
             ;;
 	diff)

installsystems/repository.py

@@ -287,7 +287,7 @@ class Repository(object):
         else:
             arrow("Nothing to clean")
 
-    def delete(self, name, version):
+    def delete(self, name, version, payloads=True):
         '''
         Delete an image from repository
         '''
@@ -307,8 +307,11 @@ class Repository(object):
         self.db.ask("DELETE FROM image WHERE md5 = ?",
                         (md5s[0],)).fetchone()
         self.db.commit()
-        # Removing script image
+        # Removing files
         arrow("Removing files from pool")
+        # if asked don't remove payloads
+        if not payloads:
+            md5s = [ md5s[0] ]
         arrowlevel(1)
         for md5 in md5s:
             self._remove_file(md5)