Is there any reason why my present working directory is not on my Ruby path?
Consider:
~:499$ irb
ruby-1.9.2-p136 :002 > puts $:
/Users/mrberryman/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1
/Users/mrberryman/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/x86_64-darwin10.6.0
/Users/mrberryman/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby
/Users/mrberryman/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/vendor_ruby/1.9.1
/Users/mrberryman/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/vendor_ruby/1.9.1/x86_64-darwin10.6.0
/Users/mrberryman/.rvm/rubies/ruby-1.9.2开发者_开发知识库-p136/lib/ruby/vendor_ruby
/Users/mrberryman/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1
/Users/mrberryman/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/x86_64-darwin10.6.0
=> nil
This is really bothering me because require isn't working as I thought it would (although I'm a ruby nuby):
require 'some_file_that_I_know_darn_well_is_in_pwd.rb'
If I append '.'
to the end, then the require works as I'd expect.
What am I missing?
UPDATE:
Arg! Now I'm getting a new problem. Consider:
ruby-1.9.2-p136 :010 > `ls`
=> "start.rb\n"
ruby-1.9.2-p136 :011 > require_relative 'start'
LoadError: cannot infer basepath
from (irb):11:in `require_relative'
from (irb):11
from /Users/mrberryman/.rvm/rubies/ruby-1.9.2-p136/bin/irb:16:in `<main>'
Now what's up?
In Ruby 1.9.2 the Powers that Be introduced an explicit change so that the working directory is no longer in the Ruby path. I thought it was the Apocalypse and a terrible thing, until I learned about require_relative
. My apps tend to look like this:
require 'some_gem'
require 'another_gem'
require_relative 'lib/init'
And then lib/init.rb
can have:
require_relative 'lib1' # this is lib/lib1.rb
require_relative 'lib2' # this is lib/lib2.rb
It's the bees knees, and solves all sorts of problems I used to have with requiring the same file from different working directories.
Edit: Unfortunately (for reasons I don't know and haven't looked into) require_relative
doesn't work specifically in irb. For this you can:
- do what you initially described: either
$: << '.'
or$:.unshift '.'
, or you can use
load 'myfile.rb'
orrequire './myfile'
instead:irb(main):001:0> Dir['*.rb'] => ["a.rb", "bar.rb", "foo.rb", "prime.rb", "tmp.rb"] irb(main):002:0> require 'a' LoadError: no such file to load -- a from <internal:lib/rubygems/custom_require>:29:in `require' from <internal:lib/rubygems/custom_require>:29:in `require' from (irb):2 from /usr/local/bin/irb:12:in `<main>' irb(main):003:0> require_relative 'a' LoadError: cannot infer basepath from (irb):3:in `require_relative' from (irb):3 from /usr/local/bin/irb:12:in `<main>' irb(main):004:0> load 'a.rb' a => true irb(main):005:0> require './a' a => true
You can use require_relative assuming it does what you need.
Make sure that the environment variable "RUBYLIB" is set with all directory paths where you will find custom *.rb code. It drove me nuts too.
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