Zomg: Ruby Command Line and Ruby Debugging

ZOMG: CLI and no puts Jesse Wolgamott @jwo | houston.rb Meeting

Part 1 DavidCopelandawesomecommandline apps

Command Line Apps• What makes a Command Line App?• Follow the unix way

It’s nota script

Kind toOthers

BeHelpful

Two Kinds ofCommand Lines

• Simple utility (think ls, or grep)• Command suite (think github’s, with multiple commands)

Helpful Appsdo not destroy

my_cmd -> nothing destructivemy_cmd -h -> full help statementmy_cmd help command -> full help for thatcommand

List of Gems

Gem why For? GLI Command Suite OptionsChoices or OptionParser Utility Options Aruba Cuke Tests Terminal-Table Format output in tables Rainbow Color output

Note: Choice is probably only good for1.8 appsBut I kinda like itAnd didn’t have an OptionParserExample

FREAL, look at GLI

Sample LoremIpsum created using GLIhttps://github.com/jwo/ Ipster/

Part 2jim weirichdebuggingthe safari

Debugging, no puts

Does anyonehere debug?

PRY ruby -rpry convert.rb 98.6def index @articles = Article.all binding.pryend

Also, there’s a railscast!

PRY is good for• Can use ls to list variables• Can inspect variables• Can cd into an @variable• Inspects State.

How To Start items.each do |item| debugger #bam

What you can dol #where am I# to go to next: n #next method# to go into the next method s #step into# to evaluate ruby : e item #evaluate item, so itll inspect it# display ruby expression with each step displ # displ Item.count•

Da Gems Ruby 1.9gem “ruby-debug19”Ruby 1.8gem “ruby-debug”

Zomg: Ruby Command Line and Ruby Debugging

by Jesse Wolgamott on Nov 09, 2011

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Zomg: Ruby Command Line and Ruby Debugging — Presentation Transcript

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