quickly find where a gem is installed
Sometimes you need to know where a gem is installed, or at least, where Ruby thinks a gem is installed, from within Ruby.
Use the find_by_name method of Gem::Specification:
[1] pry(main)> Gem::Specification::find_by_name('puppet').gem_dir
=> "/usr/lib/ruby/gems/1.9.1/gems/puppet-3.1.1"Done!
Use find_by_name without .gem_dir for a lot more info.
Additional tip: from the commandline, gem which might be what you need, but note that this will return the full path to the library, not the containing directory.
Written by Sam Halicke
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2 Responses
Why not use gem which pry?
@hanjianwei gem which returns results that include the full name of the gem (e.g. gem which bundler returns a path ending in bundler.rb where in this case i want only the directory name)
In this particular case, I want to know the gem's directory from inside Ruby, not necessarily from the command line. I use pry here to demonstrate interactively.
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