From: Brian Candler <b.candler@...>
Date: 2011-08-13T20:13:27+09:00
Subject: Re: Stuck at an Issue with OptParse and File IO

ideal one wrote in post #1016461:
> Hi,
>    i am picking default values that i am using in optparser class,
> something like this...
>
> options.logfile = LOGFILE
> options.results_dir = Pathname.new(ENV['TEMP'])
>
> PROG = Pathname.new($0).basename
> EFIX = PROG.sub(/\..*$/,'')
> LOGFILE = Pathname.new("#{ENV['TEMP']}/#{FPREFIX}.log")

That code wouldn't work, because you're using LOGFILE (in the first 
line) before you've assigned to it (the last line); and also you've not 
shown any initial creation of the 'options' object anyway.

So the best thing you can do is to write a single, complete, standalone 
program which demonstrates your problem - then it's easy for us to run 
it and explain what's wrong. Although usually, I think you'll find that 
in the process of boiling it down to this test case, you'll work out 
what the problem was anyway.

> fh = options.logfile.open('w')      --> This line is failing
> log = TeeLogger.new(fh,$stderr)
> log.level = Logger::INFO
> log = TeeLogger.new(fh,$stderr)
> <CODE>
>
> Im running it on eclipse and on also on cmd i get the same error....So
> when i run=>
> ruby opttest.rb
>
> "C:/Users/user1/workspace/Test/opttest.rb:153:in `<main>': undefined
> method `logfile' for #<OptionParser:0x2cace70> (NoMethodError)

That means: your 'options' object, which is an instance of class 
OptionParser, doesn't have a method called 'logfile'.

So you need to go to the documentation for OptionParser and see what 
method you should be calling instead.

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