1 files changed, 38 insertions, 16 deletions
diff --git a/debian/bin/sisu3 b/debian/bin/sisu3
index 66e57f11..473c18ce 100644
--- a/debian/bin/sisu3
+++ b/debian/bin/sisu3
@@ -2,25 +2,24 @@
 # encoding: utf-8
 #SiSU: copyright (C) 1997 - 2011 Ralph Amissah; License GPL, see appended program information
 begin
-  def check_sisu_stable_ruby_version?
-    rbv_sisu_stable='1.9.2' #'1.8.7'
-    if RUBY_VERSION < rbv_sisu_stable
-      raise "Please, use Ruby#{rbv_sisu_stable} or later, current Ruby #{RUBY_VERSION}"
-    else check_incompatible_ruby_build?
-    end
-  end
-  def check_sisu_dev_ruby_version?
-    rbv_sisu_dev='1.9.2'
-    if RUBY_VERSION < rbv_sisu_dev
-      raise "Please, use Ruby#{rbv_sisu_dev} or later, current Ruby #{RUBY_VERSION}"
+  def ruby_version_ok?(base_version)
+    @v ||=RUBY_VERSION.scan(/\d+/)
+    vb=base_version.scan(/\d+/)
+    if @v[0].to_i <  vb[0].to_i \
+    or @v[0].to_i == vb[0].to_i \
+    && @v[1].to_i <  vb[1].to_i \
+    or @v[0].to_i == vb[0].to_i \
+    && @v[1].to_i == vb[1].to_i \
+    && @v[1].to_i <  vb[2].to_i
+      raise "Please, use Ruby#{vb} or later, current Ruby #{RUBY_VERSION}"
     else check_incompatible_ruby_build?
     end
   end
   def check_incompatible_ruby_build?
     require 'rbconfig'
     e=Config::CONFIG
-    if  RUBY_VERSION == '1.9.2' \
-    and e['PATCHLEVEL'].to_i < 180
+    if RUBY_VERSION == '1.9.2' \
+    && e['PATCHLEVEL'].to_i < 180
       raise <<WOK
 There are known issues with early versions of ruby1.9.2.
 Please, use Ruby 1.9.2p180 or later,
@@ -30,21 +29,33 @@ current version #{e['RUBY_PROGRAM_VERSION']}p#{e['PATCHLEVEL']}
 WOK
     end
   end
+  def check_sisu_legacy_ruby_version?
+    rbv_sisu_legacy='1.9.2' #'1.8.7'
+    ruby_version_ok?(rbv_sisu_legacy)
+  end
+  def check_sisu_stable_ruby_version?
+    rbv_sisu_stable='1.9.2'
+    ruby_version_ok?(rbv_sisu_stable)
+  end
+  def check_sisu_dev_ruby_version?
+    rbv_sisu_dev='1.9.2'
+    ruby_version_ok?(rbv_sisu_dev)
+  end
   $VERBOSE=nil
   $KCODE='u' if RUBY_VERSION < '1.9'
   argv=$*
   SiSU_version_dir=case argv.inspect
   when /--v2/
-    check_sisu_stable_ruby_version?
+    check_sisu_legacy_ruby_version?
     'v2'
   when /--v3/
-    check_sisu_dev_ruby_version?
+    check_sisu_stable_ruby_version?
     'v3'
   when /--dev/
     check_sisu_dev_ruby_version?
     'v3'
   else
-    check_sisu_dev_ruby_version?
+    check_sisu_stable_ruby_version?
     'v3'
   end
   SiSU_lib="sisu/#{SiSU_version_dir}"
@@ -67,6 +78,17 @@ rescue
     system RUBYPATH: ${RUBYPATH}
     system RUBYLIB: ${RUBYLIB}
   "})
+  puts %{
+    On a Debian system the following system commands may help set the default version of ruby to 1.9.2:
+      sudo update-alternatives --verbose --set ruby /usr/bin/ruby1.9.1
+      export RUBYPATH='/usr/local/bin:/usr/bin'
+      export RUBYLIB='/usr/local/lib/site_ruby/1.9.1:/usr/lib/ruby/1.9.1:/usr/local/lib/site_ruby/1.8:/usr/lib/ruby/1.8'
+
+    To return to ruby 1.8 (not suitable for sisu):
+      sudo update-alternatives --verbose --set ruby /usr/bin/ruby1.8
+      export RUBYPATH='/usr/local/bin'
+      export RUBYLIB='/usr/local/lib/site_ruby/1.8:/usr/lib/ruby/1.8:/usr/local/lib/site_ruby/1.9.1:/usr/lib/ruby/1.9.1'
+  }
 end
 __END__