ruby和irb是否使用不同的模块搜索路径？

发布时间：2020-12-16 22:30:24 所属栏目：百科来源：网络整理

导读：我有一个试图要求restclient模块的 Ruby脚本.当我将它减少到这一行时,它仍然会失败： #!/usr/bin/env rubyrequire 'restclient' 当我运行它时,我收到以下错误： ./test.rb:3:in `require': no such file to load -- restclient (LoadError) from ./test2.rb:

我有一个试图要求restclient模块的 Ruby脚本.当我将它减少到这一行时,它仍然会失败：

#!/usr/bin/env ruby

require 'restclient'

当我运行它时,我收到以下错误：

./test.rb:3:in `require': no such file to load -- restclient (LoadError)
    from ./test2.rb:3

当我运行irb时,模块加载正常：

$irb
>> require "restclient"
=> true
>>

据我所知,看起来脚本和irb都有相同的模块路径：

$ruby -e "puts $:"
/Library/Ruby/Site/1.8
/Library/Ruby/Site/1.8/powerpc-darwin10.0
/Library/Ruby/Site/1.8/universal-darwin10.0
/Library/Ruby/Site
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/vendor_ruby/1.8
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/vendor_ruby/1.8/universal-darwin10.0
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/vendor_ruby
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/powerpc-darwin10.0
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0
.

$irb
>> puts $:
/Library/Ruby/Site/1.8
/Library/Ruby/Site/1.8/powerpc-darwin10.0
/Library/Ruby/Site/1.8/universal-darwin10.0
/Library/Ruby/Site
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/vendor_ruby/1.8
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/vendor_ruby/1.8/universal-darwin10.0
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/vendor_ruby
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/powerpc-darwin10.0
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0
.
=> nil
>>

什么会导致模块通过irb加载,但不是直接通过Ruby运行？

另一个令人困惑的细节是,restclient gem似乎并不在我的开头. irb如何找到它？

$locate restclient | grep gems
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/bin/restclient
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/lib/restclient
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/lib/restclient/abstract_response.rb
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/lib/restclient/exceptions.rb
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/lib/restclient/net_http_ext.rb
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/lib/restclient/payload.rb
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/lib/restclient/raw_response.rb
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/lib/restclient/request.rb
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/lib/restclient/resource.rb
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/lib/restclient/response.rb
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/lib/restclient.rb
/Library/Ruby/Gems/1.8/gems/rest-client-1.6.1/spec/restclient_spec.rb

谢谢 – 马克

解决方法

尝试

require "rubygems"

在源代码文件中,或使用ruby -rubygems filename.rb启动ruby程序.

（编辑：李大同）

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