Question

我写了一个脚本todo.rb，第一行是#!/usr/bin/env ruby。但是，运行此脚本会出现以下错误：

λ ~/ ruby todo/todo.rb 
/Users/xjia/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- highline/import (LoadError)
    from /Users/xjia/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from todo/todo.rb:6:in `<main>'

我已经安装了gem highline：

λ ~/ which gem
/Users/xjia/.rvm/rubies/ruby-1.9.3-p0/bin/gem
λ ~/ gem install highline
Successfully installed highline-1.6.15
1 gem installed
Installing ri documentation for highline-1.6.15...
Installing RDoc documentation for highline-1.6.15...
λ ~/ gem environment
RubyGems Environment:
  - RUBYGEMS VERSION: 1.8.10
  - RUBY VERSION: 1.9.3 (2011-10-30 patchlevel 0) [x86_64-darwin11.2.0]
  - INSTALLATION DIRECTORY: /Users/xjia/.rvm/gems/ruby-1.9.3-p0
  - RUBY EXECUTABLE: /Users/xjia/.rvm/rubies/ruby-1.9.3-p0/bin/ruby
  - EXECUTABLE DIRECTORY: /Users/xjia/.rvm/gems/ruby-1.9.3-p0/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-darwin-11
  - GEM PATHS:
     - /Users/xjia/.rvm/gems/ruby-1.9.3-p0
     - /Users/xjia/.rvm/gems/ruby-1.9.3-p0@global
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - http://rubygems.org/

我可以在require中irb：

λ ~/ which irb
/Users/xjia/.rvm/rubies/ruby-1.9.3-p0/bin/irb
λ ~/ irb
irb(main):001:0> require 'highline/import'
=> true

但是，require中的ruby失败完全相同：

λ ~/ which ruby
ruby: aliased to bundled_ruby
λ ~/ ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.2.0]
λ ~/ ruby -e "require 'highline/import'"
/Users/xjia/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- highline/import (LoadError)
    from /Users/xjia/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from -e:1:in `<main>'

我在Ubuntu和Mac OS X下都使用rvm。在我的Ubuntu框中，这个shebang线工作正常。但是，它在OS X下很糟糕。那么找出可用ruby的可靠方法是什么？

Answer 1

问题在于：

λ ~/ which ruby ruby: aliased to bundled_ruby

你需要检查：

which bundled_ruby

并确保它也有适当的shebang：

#!/usr/bin/env ruby

最后删除ruby的别名应该可以解决问题，你可能需要检查我的gem rubygems-bundler，它默认安装了RVM - 它提供了更“智能”的检测和使用捆绑器的方法。

可靠的方法来找出在shebang中使用哪种红宝石

1 个答案: