Which command-line tool convention is best? Kind of assuming B, for pipe-ability? If B, how do I feet a Rust CLI to do that?
oh dang, one of my Rust CLIs just works with `fgift input_file.csv > output.txt`.
for stdin and Rust, this SO answer looks promising!
OK here's where I'm at:
I want my Rust CLI to accept input from stdin (a pipe?) OR the traditional way (`foo -abc input.txt`)
But I also use StructOpt... which might be too strict for this kind of thing?
oh, maybe this is the trick?
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