Scenario:

I have to call an external program from my Ruby script, and this program sends a lot of useful (but cryptic) info to stdout and stderr.

While the program is running, I'd like to parse the lines it sends to stdout and stderr and:

  • Remove them if not necessary
  • Reformat/replace them if necessary

I tried all the usual tricks (system, exec, popen, popen3, backticks, etc. etc.), but I can only retrieve stdout/stderr after the program is executed, not during its execution.

Any ideas?

Oh, and I'm on Windows :-(

windows ruby
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