bin/sisu, processing dir related

* e.g. using live-manual/manual as sample, the following should work as expected
  available: ca de en es fr it ja pl pt_BR ro; select: en & ja:
    sisu --html -v en/live-manual.ssm ja/live-manual.ssm
  or for all available translations:
    sisu --html -v **/live-manual.ssm
  (these previously would have broken after processing the first directory)
  sisu command equivalent for all available translations being (unaffected):
    sisu --html -v --glob live-manual

1 files changed, 26 insertions, 19 deletions

diff --git a/bin/sisu b/bin/sisu
index e6a7645a..51840e07 100644
--- a/bin/sisu
+++ b/bin/sisu
@@ -222,28 +222,35 @@ class Orient
   end
   def control
     require "#{sisu_is[:path_lib]}/hub"
-    if get_processing_info.processing_files. length > 0
+    sisu_called_from_directory
+    if get_processing_info.processing_files.length > 0
       get_processing_info.processing_files.each_pair do |markup_dir,markup_file|
-        $sisu_document_markup_directory=markup_dir.gsub(/\/$/,'')
-        argv_sub=get_processing_info.command_line_modifiers + markup_file
-        if FileTest.directory?(markup_dir)
-          system("cd #{markup_dir}")
-          Dir.chdir(markup_dir)
-          $sisu_document_markup_directory_base_fixed_path=Dir.pwd.gsub(/\/(?:#{language_list.regex})$/,'')
-          SiSU::HubMaster.new(argv_sub)
-        elsif markup_dir =~/https?:/
-          markup_file.each do |mf|
-            (FileTest.file?(mf)) \
-            ? (puts 'requested remote file already exists in current directory ' + Dir.pwd + ' using ' + mf)
-            : (system("wget #{markup_dir}/#{mf}"))
+        begin
+          $sisu_document_markup_directory=markup_dir.gsub(/\/$/,'')
+          argv_sub=get_processing_info.command_line_modifiers + markup_file
+          if FileTest.directory?(markup_dir)
+            system("cd #{markup_dir}")
+            Dir.chdir(markup_dir)
+            $sisu_document_markup_directory_base_fixed_path=
+              Dir.pwd.gsub(/\/(?:#{language_list.regex})$/,'')
+            SiSU::HubMaster.new(argv_sub)
+          elsif markup_dir =~/https?:/
+            markup_file.each do |mf|
+              (FileTest.file?(mf)) \
+              ? (puts 'requested remote file already exists in current directory ' \
+                + Dir.pwd + ' using ' + mf)
+              : (system("wget #{markup_dir}/#{mf}"))
+            end
+            $sisu_document_markup_directory_base_fixed_path=
+              Dir.pwd.gsub(/\/(?:#{language_list.regex})$/,'')
+            argv_sub=command_line_modifiers + markup_file
+            SiSU::HubMaster.new(argv_sub)
+          else p "Error directory specified #{markup_dir} not found"
           end
-          $sisu_document_markup_directory_base_fixed_path=Dir.pwd.gsub(/\/(?:#{language_list.regex})$/,'')
-          argv_sub=command_line_modifiers + markup_file
-          SiSU::HubMaster.new(argv_sub)
-        else p "Error directory specified #{markup_dir} not found"
+        ensure
+          Dir.chdir(sisu_called_from_directory)
+          system("cd #{sisu_called_from_directory}")
         end
-        Dir.chdir(sisu_called_from_directory)
-        system("cd #{sisu_called_from_directory}")
       end
     else
       $sisu_document_markup_directory=Dir.pwd.gsub(/\/$/,'')