Added --ignore-nonexistent-config to allow integration with Pronterface even if config file doesn't exist

README.markdown

@@ -188,9 +188,11 @@ Put this into *slicecommand*:
 
 And this into *sliceoptscommand*:
 
-    slic3r.pl --load config.ini
+    slic3r.pl --load config.ini --ignore-nonexistent-config
 
-Replace `slic3r.pl` with the full path to the slic3r executable.
+Replace `slic3r.pl` with the full path to the slic3r executable and `config.ini`
+with the full path of your config file (put it in your home directory or where
+you like).
 On Mac, the executable has a path like this:
 
     /Applications/Slic3r.app/Contents/MacOS/slic3r

slic3r.pl

@@ -24,6 +24,7 @@ my %cli_options = ();
         
         'save=s'                => \$opt{save},
         'load=s'                => \$opt{load},
+        'ignore-nonexistent-config' => \$opt{ignore_nonexistent_config},
     );
     foreach my $opt_key (keys %$Slic3r::Config::Options) {
         my $opt = $Slic3r::Config::Options->{$opt_key};
@@ -36,8 +37,11 @@ my %cli_options = ();
 
 # load configuration
 if ($opt{load}) {
-    -e $opt{load} or die "Cannot find specified configuration file.\n";
-    Slic3r::Config->load($opt{load});
+    if (-e $opt{load}) {
+        Slic3r::Config->load($opt{load});
+    } else {
+        $opt{ignore_nonexistent_config} or die "Cannot find specified configuration file.\n";
+    }
 }
 
 # validate command line options