为什么当前目录不在我的 Ruby 路径上？

发布于 2024-10-17 02:04:18 字数 1332 浏览 3 评论 0原文

我当前的工作目录不在我的 Ruby 路径上有什么原因吗？

考虑一下：

~: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-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

这真的让我很困扰，因为 require 没有像我想象的那样工作（尽管我是 ruby nuby）：

require 'some_file_that_I_know_darn_well_is_in_pwd.rb'

如果我在末尾附加 '.' ，那么 require 的工作方式如下我预计。

我缺少什么？

更新：

arg！现在我遇到了一个新问题。想一想：

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>'

现在怎么样？

原文

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-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?

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剪不断理还乱 2024-10-24 02:04:18

Ruby 1.9.2 中引入的权力显式更改，使工作目录不再位于 Ruby 路径中。我认为这是世界末日，是一件可怕的事情，直到我了解 require_relative。我的应用程序往往看起来像这样：

require 'some_gem'
require 'another_gem'
require_relative 'lib/init'

然后 lib/init.rb 可以具有：

require_relative 'lib1' # this is lib/lib1.rb
require_relative 'lib2' # this is lib/lib2.rb

这是蜜蜂的膝盖，解决了我过去需要来自不同工作目录的相同文件的各种问题。

编辑：不幸的是（由于我不知道也没有研究过的原因）require_relative 并不专门在 irb 中工作。为此，您可以：

执行您最初描述的操作： $: << '.' 或 $:.unshift '.'，或

您可以使用 load 'myfile.rb' 或 require '. /myfile' 改为：

irb(主):001:0>目录['*.rb']
=> [“a.rb”，“bar.rb”，“foo.rb”，“prime.rb”，“tmp.rb”]

irb(主):002:0>需要“a”
LoadError：没有要加载的文件--a
  来自 :29:in `require'
  来自 :29:in `require'
  来自（irb）：2
  来自 /usr/local/bin/irb:12:in `'

irb(主):003:0> require_relative 'a'
LoadError：无法推断基本路径
  来自（irb）：3：在“require_relative”中
  来自（irb）：3
  来自 /usr/local/bin/irb:12:in `'

irb(主):004:0>加载“a.rb”
一个
=>真的

irb(主):005:0>需要'./a'
一个
=>真的

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' or require './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

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