simgrid_update_xml: more explicit message when no file is provided

diff --git a/tools/simgrid_update_xml.pl b/tools/simgrid_update_xml.pl
index da3df3f..8419bd7 100755 (executable)
--- a/tools/simgrid_update_xml.pl
+++ b/tools/simgrid_update_xml.pl
@@ -144,16 +144,13 @@ use strict;
 my $fromversion=-1;
 my $toversion=4;
 
 my $fromversion=-1;
 my $toversion=4;
 

-my($output_string);
-
-my $filename = $ARGV[0] or die "simgrid_update_xml.pl <platform.xml>\n";
+my $filename = $ARGV[0] or die "Usage: simgrid_update_xml.pl file_to_convert.xml\nPlease provide an XML to convert as a parameter.\n";

 open INPUT, "$filename" or die "Cannot open input file $filename: $!\n";
 
 open INPUT, "$filename" or die "Cannot open input file $filename: $!\n";
 

-$output_string = "<?xml version='1.0'?>\n".
+my $output_string = "<?xml version='1.0'?>\n".

     "<!DOCTYPE platform SYSTEM \"http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd\">\n".
     "<platform version=\"$toversion\">\n";
 
     "<!DOCTYPE platform SYSTEM \"http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd\">\n".
     "<platform version=\"$toversion\">\n";
 

-

 my($AS_opened)=0;
 
 my $line;
 my($AS_opened)=0;
 
 my $line;