improve openpkg-dev-release script once more by adding rsync support

.openpkg/openpkg-dev-release

@@ -1,7 +1,8 @@
 #!/usr/opkg/bin/perl
 
-#   configure official upload URL
+#   official upload parameters
 my $upload_url = "openpkg-upload\@download.openpkg.org:/";
+my $upload_mode = "rsync";
 
 #   list of positional arguments
 my @spec = (
@@ -46,9 +47,17 @@ system($cmd);
 print STDOUT "\033[31m++ uploading source RPM package to OpenPKG download repository\033[0m\n";
 print STDOUT "-- local:  " . $info->{"source-rpm-file"} . "\n";
 print STDOUT "-- remote: " . $upload_url . "\n";
-my $cmd = "scp -o 'Compression no'";
-$cmd .= " " . $info->{"source-rpm-file"};
-$cmd .= " " . $upload_url;
+my $cmd;
+if ($upload_mode eq "rsync") {
+    $cmd = "rsync --rsh=\"ssh -o 'Compression no'\" --partial --progress";
+    $cmd .= " " . $info->{"source-rpm-file"};
+    $cmd .= " " . $upload_url;
+}
+elsif ($upload_mode eq "scp") {
+    $cmd = "scp -o 'Compression no'";
+    $cmd .= " " . $info->{"source-rpm-file"};
+    $cmd .= " " . $upload_url;
+}
 print STDOUT "\$ $cmd\n";
 system($cmd);