November 2013
Intermediate to advanced
224 pages
6h 9m
English
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Building an Easy-to-Use Command-Line Interface
If you’ve done a lot of shell scripting (or even written a command-line tool in C), you’re probably familiar with getopt,[14] which is a C library for parsing the command line and an obvious choice as a tool for creating your interface. Although Ruby includes a wrapper for getopt, you shouldn’t use it, because there’s a better built-in option: OptionParser. As you’ll see, OptionParser is not only easy to use but is much more sophisticated than getopt and will result in a superior command-line interface for your app. OptionParser code is also easy to read and modify, making enhancements to your app simple to implement.
Before we see how to use OptionParser, let’s first consider the input our application ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.