BUILDING COMMAND LINE INTERFACES IN Node.JS 1 Copyright © 2012 Clock Limited Clock ® is a registered trademark of Clock limited in the EU and other territories Registered in England and Wales No.3457724 VAT Registered No. 706 7654 20 

@domharrington 2 WHO AM I? Github: domharrington 

'process' module Arguments accessible via 'process.argv' Array of arguments 3 COMMAND- LINE IN NODE 

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Perfectly fine if you only need one argument E.g. accessing the first argument: process.argv[2] Parsing of options becomes unmanageable 5 PROBLEMS WITH THIS APPROACH 

Module to help ease the pain of parsing command-line options Simple, natural API Auto generated --help and --version 6 COMMANDER.JS https://github.com/visionmedia/commander.js/ 

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Options don't need to be defined All options are parsed automatically Also has default values, aliases Many more features 9 NODE-OPTIMIST https://github.com/substack/node-optimist 

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aparser cli node-arguments And many more … 12 SOME MORE LIBRARIES 

13 WHERE HAVE I USED IT? https://github.com/domharrington/gitme 

14 ANY QUESTIONS?