CODEWITHSUNDEEP
rubyrubygems
joslinm
joslinm

Reputation: 8105

How do you backtrace a class to library/gem it's loaded from?

If I have a class in Ruby and a Gemfile thousand lines long, what's the best way to resolve the class => gem relationship?

Upvotes: 0

Views: 43

Answers (1)

Tom Lord
Tom Lord

Reputation: 28305

Having a Gemfile that's 1000 lines long is probably going to be a big source of pain, especially when upgrading libraries - that's a huge list of dependencies!!

It's often obvious which gem is the source, just by looking at the naming conventions. But in cases when not, you can track it down with Method#source_location:

> puts method(:mystery_method).source_location
> puts MysteryClass.method(:initialize).source_location

If you are using pry, then there is also a convenient command for displaying the source code of a class/method (using the show-method command, or $ for short):

(pry) > $ mystery_method
(pry) > $ MysteryClass

Also worth mentioning is Method#super_method - which can be useful when tracking down behaviour from complex inheritance/mixins.

Upvotes: 1

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