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# Env.rb -- imports environment variables as global variables
#
# Usage:
#
# 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
p $TERM
$TERM = nil
p $TERM
p ENV["TERM"]
$TERM = "foo"
p ENV["TERM"]
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