[#639 state:resolved] error check ruby & rails existence and version

in hobo script

hobo/bin/hobo

@@ -7,6 +7,11 @@ require 'rbconfig'
 
 RUBY = File.join(Config::CONFIG['bindir'], Config::CONFIG['ruby_install_name']).sub(/.*\s.*/m, '"\&"')
 
+if RUBY.empty?
+  puts "ruby not found"
+  exit 2
+end
+
 Signal.trap("INT") { puts; exit }
 
 hobo_src = File.join(File.dirname(__FILE__), "../hobo_files/plugin")
@@ -87,11 +92,17 @@ if run_rails
   opts = []
   if rails_version
     opts << "_#{rails_version}_"
-#  else
-#    if `rails -v`.split[1].split(".").slice(0,2)!=['2', '3']
-#      puts "Rails 2.3 required!"
-#      exit 2
-#    end
+  else
+    v=`#{RUBY} -S rails -v`.split[1].split(".")
+    unless v.length===3
+      puts "rails not found!"
+      exit 2
+    end
+    unless v[0]=='2' && ['2', '3'].include?(v[1])
+      puts "Rails 2.2 or 2.3 required!"
+      puts "Rails 3 requires Hobo 1.1 or later."
+      exit 2
+    end
   end
   opts << "-d #{database_type}" if database_type
   system("#{RUBY} -S rails #{opts * ' '} #{app_path}")