add zypper arguments to snapshot description

data/zypp-plugin.conf

@@ -15,5 +15,13 @@
     <solvable match="w" important="true">udev</solvable>
     <solvable match="w">*</solvable>
   </solvables>
+
+  <!--  Set enabled to "true" in order to save zypper commandline arguments in snapshot descriptions.
+        by default arguments following zypp(zypper) are truncated at 32 chars. change to 0 for unlimited output -->
+
+  <description>
+	  <zypper-extended-description enabled="false">32</zypper-extended-description>
+  </description>
+
 
 </snapper-zypp-plugin-conf>

scripts/zypp-plugin.py

@@ -56,6 +56,8 @@ class Config:
 
     def __init__(self):
         self.solvables = []
+	self.self.zypper_extended_description_enabled = False
+	self.self.zypper_extended_description_length = 0
         self.load_file("/etc/snapper/zypp-plugin.conf")
 
 
@@ -90,6 +92,19 @@ def load_dom(self, dom):
 
         except:
             pass
+	try:
+		for tmp3 in dom.getElementsByTagName("description"):
+			for tmp4 in tmp3.getElementsByTagName("zypper-extended-description"):
+				string_size = tmp4.childNodes[0].data
+				description_enabled = tmp4.getAttribute("enabled")
+				if not description_enabled in [ "true", "false" ]:
+					loggin.error("unknown extended-config enabled attribute %s" % description_enabled)
+					continue
+				if description_enabled == "true":
+					self.zypper_extended_description_enabled = True
+					self.zypper_extended_description_length = int(string_size)
+	except:
+		pass
 
 
 
@@ -145,15 +160,26 @@ def match_solvables(self, names):
                     if found and important:
                         return True, True
         return found, important
+
+    def zypper_arguments(self):
+        if basename(readlink("/proc/%d/exe" % getppid())) == "zypper":
+            argument = " " + " ".join(open("/proc/%s/cmdline" % getppid()).read().split('\x00')[1:])
+        else:
+            return ""
+	if config.zypper_extended_description_length == 0:
+		return argument
+	else:
+		return argument[0:config.zypper_extended_description_length]
 
 
     def PLUGINBEGIN(self, headers, body):
 
         logging.info("PLUGINBEGIN")
 
         logging.debug("headers: %s" % headers)
-
-        self.description = "zypp(%s)" % basename(readlink("/proc/%d/exe" % getppid()))
+	self.description = "zypp(%s)" % basename(readlink("/proc/%d/exe" % getppid()))
+	if config.zypper_extended_description_enabled == True:
+		self.description.append(self.zypper_arguments())
         self.userdata = self.get_userdata(headers)
 
         self.ack()