1 files changed, 11 insertions, 27 deletions
diff --git a/bin/sisu b/bin/sisu
index 0786500f..501e439b 100644
--- a/bin/sisu
+++ b/bin/sisu
@@ -56,34 +56,18 @@ WOK
   SiSU_called_from_directory=Dir.pwd
   require 'rubygems'
   check_sisu_stable_ruby_version?
-  if __FILE__ =~/gem/ \
-  and  __FILE__ =~/sisu-[45]\.\d+\.\d+/
-    SiSU_version_dir=(__FILE__ =~/sisu-5\.\d+\.\d+/) \
-    ? 'v5'
-    : 'v4'
-  elsif $0 !~/\b(?:sisu[45]|sisugem)$/
-    SiSU_version_dir=case argv.inspect
-    when /"(?:--v4)"/
-      'v4'
-    when /"(?:--v5)"/
-      'v5'
-    when /"--dev"/
-      'v5'
-    else
-      'v4'
-    end
+  default_version=if __FILE__ =~/gem/ \
+  and  __FILE__ =~/\/sisu-[45]\.(?:\d+|[a-z])\.(?:\d+|[a-z])\//
+    SiSU_version_dir=(__FILE__ =~/\/sisu-5\.(?:\d+|[a-z])\.(?:\d+|[a-z])\//) ? 'v5' : 'v4'
+  else 'v4'
+  end
+  if $0 =~/\bsisu4$/                             then 'v4'
+  elsif $0 =~/\bsisu5$/                          then 'v5'
   else
-    SiSU_version_dir=case $0
-    when /\bsisu4$/
-      'v4'
-    when /\bsisu5$/
-      'v5'
-    when /sisugem$/  # should have been caught earlier, unused, debug check
-      SiSU_version_dir=(__FILE__ =~/sisu-5\.\d+\.\d+/) \
-      ? 'v5'
-      : 'v4'
-    else
-      'v4'
+    SiSU_version_dir=case argv.inspect
+    when /"(?:--v4|--current|--stable)"/         then 'v4'
+    when /"(?:--v5|--next|--dev)"/               then 'v5'
+    else default_version
     end
   end
 #% $0 File.expand_path($0)