installer: remove empty directories again:

An "archive" installer contains one empty share/extensions/dict-XY/
directory for every dictionary (except the 3 default ones), causing
numerous assertions about missing META-INF/manifest.xml and an extension
manager cluttered; this is due to overzealous removal of extension
"prereg" code.  (regression from
6dcb3d4e, partially revert that)

Change-Id: I3a063ebfed1012aeb27ec3076cdd5ca545f918a2

solenv/bin/modules/installer/simplepackage.pm

@@ -60,6 +60,22 @@ sub check_simple_packager_project
     }
 }
 
+####################################################
+# Detecting the directory with extensions
+####################################################
+
+sub get_extensions_dir
+{
+    my ( $subfolderdir ) = @_;
+
+    my $extensiondir = $subfolderdir . $installer::globals::separator;
+    if ( $installer::globals::officedirhostname ne "" ) { $extensiondir = $extensiondir . $installer::globals::officedirhostname . $installer::globals::separator; }
+    my $extensionsdir = $extensiondir . "share" . $installer::globals::separator . "extensions";
+    my $preregdir = $extensiondir . "share" . $installer::globals::separator . "prereg" . $installer::globals::separator . "bundled";
+
+    return ( $extensionsdir, $preregdir );
+}
+
 ##################################################################
 # Collecting all identifier from ulf file
 ##################################################################
@@ -655,6 +671,9 @@ sub create_simple_package
     installer::logger::print_message( "... removing superfluous directories ...\n" );
     installer::logger::include_header_into_logfile("Removing superfluous directories:");
 
+    my ( $extensionfolder, $preregdir ) = get_extensions_dir($subfolderdir);
+    installer::systemactions::remove_empty_dirs_in_folder($extensionfolder);
+
     if ( $installer::globals::compiler =~ /^unxmacx/ )
     {
         installer::worker::put_scpactions_into_installset("$installdir/$packagename");

solenv/bin/modules/installer/systemactions.pm

@@ -1355,4 +1355,51 @@ sub read_full_directory {
     return
 }
 
+##############################################################
+# Removing all empty directories below a specified directory
+##############################################################
+
+sub remove_empty_dirs_in_folder
+{
+    my ( $dir ) = @_;
+
+    my @content = ();
+    my $infoline = "";
+
+    $dir =~ s/\Q$installer::globals::separator\E\s*$//;
+
+    if ( -d $dir )
+    {
+        opendir(DIR, $dir);
+        @content = readdir(DIR);
+        closedir(DIR);
+
+        my $oneitem;
+
+        foreach $oneitem (@content)
+        {
+            if ((!($oneitem eq ".")) && (!($oneitem eq "..")))
+            {
+                my $item = $dir . $installer::globals::separator . $oneitem;
+
+                if ( -d $item ) # recursive
+                {
+                    remove_empty_dirs_in_folder($item);
+                }
+            }
+        }
+
+        # try to remove empty directory
+        my $returnvalue = rmdir $dir;
+
+        if ( $returnvalue )
+        {
+            $infoline = "Successfully removed empty dir $dir\n";
+            push(@installer::globals::logfileinfo, $infoline);
+        }
+
+    }
+
+}
+
 1;