宝石发现在irb中，而不是在Ruby中 [英] Gem found in irb, not in Ruby

问题描述

  require'rubygems' 
 require'mygem'
  

当我运行该应用程序时，出现此错误： < internal：lib / ruby​​gems / custom_require>：29：in require'：no such file to load - mygem（LoadError）`

但是，如果我尝试在 irb 内部确保需要gem（确保首先需要'rubygems'），它可以正常工作。我应该做些什么？

在 > ruby​​ ， gem 和 irb 显示它们都在 / opt / local / bin / ，即

 > ruby 
 / opt / local / bin / ruby​​ 
>其中宝石
 / opt / local / bin / gem 
>其中irb 
 / opt / local / bin / irb 
  

更新回答提出的问题是的，irb和ruby指向不同的文件夹）：

$ LOAD_PATH 和 $ ：在irb中都包含似乎指向ruby 1.8的文件夹：

  / opt / local / lib / ruby​​ / site_ruby / 1.8 
 /opt/local/lib/ruby/site_ruby/1.8/i686-darwin10 
 / opt / local / lib / ruby​​ / site_ruby 
 / opt / local / lib / ruby​​ / vendor_ruby / 1.8 
 /opt/local/lib/ruby/vendor_ruby/1.8/i686-darwin10 
 / opt / local / lib / ruby​​ / vendor_ruby 
 / opt / local / lib / ruby​​ / 1.8 
 /opt/local/lib/ruby/1.8/i686-darwin10 
。 
  

$：在ruby中指向ruby 1.9 .1文件夹：

  /usr/local/lib/ruby/site_ruby/1.9.1 
 / usr / local /lib/ruby/site_ruby/1.9.1/i386-darwin9.8.0 
 / usr / local / lib / ruby​​ / site_ruby 
 /usr/local/lib/ruby/vendor_ruby/1.9.1 
 /usr/local/lib/ruby/vendor_ruby/1.9.1/i386-darwin9.8.0 
 / usr / local / lib / ruby​​ / vendor_ruby 
 /usr/local/lib/ruby/1.9 .1 
 /usr/local/lib/ruby/1.9.1/i386-darwin9.8.0 
  

code> gem env 显示

  RubyGems环境：
 -  RUBYGEMS VERSION：1.4.1 
  -  RUBY VERSION：1.8.7（2010-12-23 patchlevel 330）[i686-darwin10] 
  - 安装目录：/ opt / local / lib / ruby​​ / gems /1.8 
  -  RUBY EXECUTABLE：/ opt / local / bin / ruby​​ 
  - 可执行目录：/ opt / local / bin 
  -  RUBYGEMS平台：
  -  ruby​​ 
 -  x86-darwin-10 
  - 创业板路径：
  -  /opt/local/lib/ruby/gems/1.8 
  - 创业板配置：
 - ：update_sources => true 
  - ：verbose => true 
  - ：benchmark => false 
  - ：backtrace => false 
  - ：bulk_threshold => 1000 
  - gempath=> [/opt/local/lib/ruby/gems/1.8] 
  - ：sources => [http://rubygems.org/，http://gems.github.com，http://gems.github.com] 
  - 远程来源：
  -  http ：//rubygems.org/ 
  -  http://gems.github.com 
  -  http://gems.github.com 
  

在irb中的Gem.path 指向

  /Users/grautur/.gem/ruby/1.8 
 /usr/local/lib/ruby/gems/1.8 
  

Gem.path 在ruby中指向

<$ p $ /> $ / $ / $ c $ / code /

解决方案

我不确定发生了什么事。然而，以下可能会有所帮助。

在irb中，做

  require'rubygems'
 require'mygem'
 puts $：
  

然后，在ruby中，做

  require'rubygems'
 puts $：
  

并向我们展示如果您还没有完成工作，您会得到什么。

Edit：还会在命令行上输出执行 gem env 的结果。

编辑2：在irb和ruby都需要rubygems后，如果输入 puts Gem.path ，看看会发生什么。请参阅感谢Matt描述Rubygems

I have some gems installed, and I'm trying to use them in a Ruby app:

require 'rubygems'
require 'mygem'

When I run the app, though, I get this error: <internal:lib/rubygems/custom_require>:29:inrequire': no such file to load -- mygem (LoadError)`

But if I try requiring the gem inside irb (making sure to `require 'rubygems' first), it works fine. What am I supposed to do? I tried googling for this problem, but didn't understand.

Running a which on ruby, gem, and irb shows that they're all in /opt/local/bin/, i.e.,

> which ruby
/opt/local/bin/ruby
> which gem
/opt/local/bin/gem
> which irb
/opt/local/bin/irb

Update to answer the questions posed (yep, irb and ruby are pointing to different folders):

$LOAD_PATH and $: in irb both contain seem to be pointing to ruby 1.8 folders:

/opt/local/lib/ruby/site_ruby/1.8
/opt/local/lib/ruby/site_ruby/1.8/i686-darwin10
/opt/local/lib/ruby/site_ruby
/opt/local/lib/ruby/vendor_ruby/1.8
/opt/local/lib/ruby/vendor_ruby/1.8/i686-darwin10
/opt/local/lib/ruby/vendor_ruby
/opt/local/lib/ruby/1.8
/opt/local/lib/ruby/1.8/i686-darwin10
.

$: in ruby points to ruby 1.9.1 folders:

/usr/local/lib/ruby/site_ruby/1.9.1
/usr/local/lib/ruby/site_ruby/1.9.1/i386-darwin9.8.0
/usr/local/lib/ruby/site_ruby
/usr/local/lib/ruby/vendor_ruby/1.9.1
/usr/local/lib/ruby/vendor_ruby/1.9.1/i386-darwin9.8.0
/usr/local/lib/ruby/vendor_ruby
/usr/local/lib/ruby/1.9.1
/usr/local/lib/ruby/1.9.1/i386-darwin9.8.0

gem env shows

RubyGems Environment:
  - RUBYGEMS VERSION: 1.4.1
  - RUBY VERSION: 1.8.7 (2010-12-23 patchlevel 330) [i686-darwin10]
  - INSTALLATION DIRECTORY: /opt/local/lib/ruby/gems/1.8
  - RUBY EXECUTABLE: /opt/local/bin/ruby
  - EXECUTABLE DIRECTORY: /opt/local/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86-darwin-10
  - GEM PATHS:
     - /opt/local/lib/ruby/gems/1.8
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
     - "gempath" => ["/opt/local/lib/ruby/gems/1.8"]
     - :sources => ["http://rubygems.org/", "http://gems.github.com", "http://gems.github.com"]
  - REMOTE SOURCES:
     - http://rubygems.org/
     - http://gems.github.com
     - http://gems.github.com

Gem.path in irb points to

/Users/grautur/.gem/ruby/1.8
/usr/local/lib/ruby/gems/1.8

Gem.path in ruby points to

/Users/grautur/.gem/ruby/1.9.1
/usr/local/lib/ruby/gems/1.9.1

解决方案

I'm not sure what's going on. However, the following may help.

In irb, do

require 'rubygems'
require 'mygem'
puts $:

and then, in ruby, do

require 'rubygems'
puts $:

and show us what you get if you haven't worked it out.

Edit: also print out the results of doing gem env on the command line.

Edit 2: See what happens if you type in puts Gem.path after you've required rubygems in both irb and ruby. See thanks to Matt for describing Rubygems

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