From: Herman Schultz <phermans@...>
Date: 2009-08-22T00:13:24+09:00
Subject: Re: Windows ENV object being corrupted

Robert Klemme wrote:
> 2009/8/12 Herman Schultz <phermans@live.com>:
>>> this instead:
>> Thanks, Robert.  I can't argue your approach isn't simpler.  In fact, I
>> can't remember why we ended up with this. All we really want is the same
>> environment that the build system uses available for test and publishing
>> systems.  Your suggestion is noted.
>>
>> However, the problem with ENV still exists.  The problem with spaces and
>> large numbers of environment variables.  It's just not in my way
>> anymore.  When I get a chance I will use your approach and see if I can
>> re-create the problem from just parsing the setEnvironment.bat.
> 
> I was curious and created the test attached but could not provoke any
> issues with spaces.  I am pretty sure that the size of the environment
> is limited somehow but I did not hit a limit or any issues with my
> test (at 36,000 and still running).
> 
> What's going on here?
> 
> robert

I had chance to get and try your routine.  I think the author of this 
code was trying to get around a recursive problem namely that 
environment variables are comprised of one or more environment 
variables.

Once I added a routine to resolve this issue I have run without 
incident.


  def resolve_variables( field )

    value = field

    value.strip!
    replace = ""
    verbose( "In Value = " + value , 5)
    if value =~ /%(\w+)%/
       value.gsub!(/%(\w+)%/) do
          found = $1
          replace = found.gsub("%","")
          replace = ENV[replace]

          if replace.nil?
             abort("??Error: Use of undefined Environment Variable 
#{found} in #{field}")
          end
          verbose("Rep = " + replace, 5)
          verbose( "Val = " + value , 5)
          replace
       end
       verbose( "Val = " + value , 4)
    end
    verbose( "Return -> " + value , 4)
    return value
  end

      File.foreach env_batch_file do |line|
         if /^\s*SET\s*([^\s=]+)\s*=\s*(.*)$/i =~ line
            key = $1
            value = resolve_variables($2)
            verbose("ENV[" + key + "] = " + value, 1)
            ENV[key] = value
         end
      end

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