From: "Ara.T.Howard" <Ara.T.Howard@...>
Date: 2005-09-12T03:44:27+09:00
Subject: Re: r4 - the simplest ruby pre-processor

On Mon, 12 Sep 2005, Christian Neukirchen wrote:

> Bob Hutchison <hutch@recursive.ca> writes:
>
>>>>> That one change is from:
>>>>>
>>>>>
>>>>>>         "puts #{line.chomp.dump}\n"
>>>>>>
>>>>>
>>>>> to:
>>>>>     "puts \"#{line.chomp}\"\n"
>>>>> (just added the quotes).
>>>>>
>>>>
>>>> and lost the dump
>>>>
>>>
>>> And broke it.
>>>   | blah = 42
>>>   Hello. I'm an evil template. ", `rm -rf /`, "I advise against
>>> running me as root.
>>>
>>> Devin
>>>
>>
>> Broke it? Nah, it was already 'broken'. And anyway, that's what I
>> wanted to do, and really would've 'broken' it to achieve that :-)
>
> You broke it because " can't appear as-is in the file anymore.
> (Which is likely what I want when I code C or something.)

fixed:

     harp:~ > cat in
     | x = 42

     using the -i switch i can interpolate x as #{ x }

     quote " works

     quote ' works


     harp:~ > r7 in

     using the -i switch i can interpolate x as #{ x }

     quote " works

     quote ' works


     harp:~ > r7 --interpolate in

     using the -i switch i can interpolate x as 42

     quote " works

     quote ' works


     harp:~ > cat r7
     #! /usr/bin/env ruby

     def macro(m, &b); Kernel::send('define_method', m){|*a| puts b.call(a)}; end

     d = $DEBUG || ENV['DEBUG'] || ARGV.delete('-d') || ARGV.delete('--debug')

     i = $INTERPOLATE || ENV['INTERPOLATE'] || ARGV.delete('-i') || ARGV.delete('--interpolate')

     h = '_' * 42

     m = d ? 'puts' : 'eval'

     s = ARGF.readlines.map{|l| l =~ %r/^\s*\|(.*)/ ? $1 : (i ? %Q(puts <<#{ h }\n#{ l.chomp }\n#{ h }) : %Q(puts #{ l.chomp.dump }))}

     send m, s.join("\n")


-a
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