prism-auto: Don't actually execute nailgun commands in echo mode - just print them.

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@11742 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/etc/scripts/prism-auto

@@ -640,6 +640,9 @@ def printUsage():
 
 def signal_handler(signal, frame):
     if options.nailgun:
+		if options.echo or options.echoFull:
+			print(options.ngprism + "stop")
+		else:
 			subprocess.Popen([options.ngprism, " stop"]).wait()
     sys.exit(1)
 
@@ -676,6 +679,9 @@ if options.logDir and not os.path.isdir(options.logDir):
     print("Log directory \"" + options.logDir + "\" does not exist")
     sys.exit(1)
 if options.nailgun:
+	if options.echo or options.echoFull:
+		print(options.prismExec + " -ng &")
+	else:
 	    os.system(options.prismExec + " -ng &")
     	time.sleep(0.5)
 for arg in args:
@@ -686,4 +692,7 @@ for arg in args:
     else:
         print("Error: File/directory " + arg + " does not exist")
 if options.nailgun:
+	if options.echo or options.echoFull:
+		print(options.ngprism + " stop")
+	else:
 		subprocess.Popen([options.ngprism, "stop"]).wait()