1.4.0

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@520 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/Env.rb

@@ -0,0 +1,31 @@
+# Env.rb -- imports environment variables as global variables
+#
+# Usage:
+#
+#  require 'Env'
+#  p $USER
+#  $USER = "matz"
+#  p ENV["USER"]
+
+for k,v in ENV
+  next unless /^[a-zA-Z][_a-zA-Z0-9]*/ =~ k
+  eval <<EOS
+  $#{k} = %q!#{v}!
+  trace_var "$#{k}", proc{|v|
+    ENV[%q!#{k}!] = v; 
+    $#{k} = %q!#{v}!
+    if v == nil
+      untrace_var "$#{k}"
+    end
+  }
+EOS
+end
+
+if __FILE__ == $0
+  p $TERM
+  $TERM = nil
+  p $TERM
+  p ENV["TERM"]
+  $TERM = "foo"
+  p ENV["TERM"]
+end