File pygrub-handle-one-line-menu-entries.patch of Package xen

References: bsc#978413

The parsing code can't handle a single line menu entry.
For example: menuentry 'halt' { halt }
Force it to fall through where it will handle the closing brace.
Also change warning to debug to cut down on verbose output.

Index: xen-4.13.0-testing/tools/pygrub/src/GrubConf.py
===================================================================
--- xen-4.13.0-testing.orig/tools/pygrub/src/GrubConf.py
+++ xen-4.13.0-testing/tools/pygrub/src/GrubConf.py
@@ -150,7 +150,7 @@ class GrubImage(_GrubImage):
             else:
                 logging.info("Ignored image directive %s" %(com,))
         else:
-            logging.warning("Unknown image directive %s" %(com,))
+            logging.debug("Unknown image directive %s" %(com,))
 
         # now put the line in the list of lines
         if replace is None:
@@ -309,7 +309,7 @@ class GrubConfigFile(_GrubConfigFile):
                 else:
                     logging.info("Ignored directive %s" %(com,))
             else:
-                logging.warning("Unknown directive %s" %(com,))
+                logging.debug("Unknown directive %s" %(com,))
                 
         if img:
             self.add_image(GrubImage(title, img))
@@ -343,7 +343,7 @@ class Grub2Image(_GrubImage):
         elif com.startswith('set:'):
             pass
         else:
-            logging.warning("Unknown image directive %s" %(com,))
+            logging.debug("Unknown image directive %s" %(com,))
 
         # now put the line in the list of lines
         if replace is None:
@@ -408,7 +408,10 @@ class Grub2ConfigFile(_GrubConfigFile):
                     raise RuntimeError("syntax error: cannot nest menuentry (%d %s)" % (len(img),img))
                 img = []
                 title = title_match.group(1)
-                continue
+                if not l.endswith('}'):
+                    continue
+                # One line menuentry, Ex. menuentry 'halt' { halt }
+                l = '}'
 
             if l.startswith("submenu"):
                 menu_level += 1
@@ -447,7 +450,7 @@ class Grub2ConfigFile(_GrubConfigFile):
             elif com.startswith('set:'):
                 pass
             else:
-                logging.warning("Unknown directive %s" %(com,))
+                logging.debug("Unknown directive %s" %(com,))
             
         if img is not None:
             raise RuntimeError("syntax error: end of file with open menuentry(%d %s)" % (len(img),img))