ruby - Ocra在打包脚本时引发错误

我已经安装了Ruby 2.1.5 (x64)软件包，然后成功安装了Ocra gem:

gem install ocra
Fetching: ocra-1.3.3.gem (100%)
Successfully installed ocra-1.3.3
Parsing documentation for ocra-1.3.3
Installing ri documentation for ocra-1.3.3
Done installing documentation for ocra after 0 seconds
1 gem installed

我正在尝试打包测试脚本:

# -*- coding: UTF-8 -*-

# require ''
exit if Object.const_defined?(:Ocra)

print "Hello World!"
sleep 3

__END__

但是，当我尝试使用 Ocra 时，它将引发错误:

ocra "TestScript.rb"

=== Loading script to check dependencies
=== Detected gem ocra-1.3.3 (loaded, files)
===     6 files, 190931 bytes
=== Detected gem io-console-0.4.2 (loaded, files)
C:/Program Files/Ruby/lib/ruby/gems/2.1.0/gems/ocra-1.3.3/bin/ocra:86:in `open':
 No such file or directory @ dir_initialize - C:/Program Files/Ruby/lib/ruby/gem
s/2.1.0/gems/io-console-0.4.2 (Errno::ENOENT)
        from C:/Program Files/Ruby/lib/ruby/gems/2.1.0/gems/ocra-1.3.3/bin/ocra:
86:in `entries'
        from C:/Program Files/Ruby/lib/ruby/gems/2.1.0/gems/ocra-1.3.3/bin/ocra:
86:in `entries'
        from C:/Program Files/Ruby/lib/ruby/gems/2.1.0/gems/ocra-1.3.3/bin/ocra:
92:in `find_all_files'
        from C:/Program Files/Ruby/lib/ruby/gems/2.1.0/gems/ocra-1.3.3/bin/ocra:
665:in `block (2 levels) in find_gem_files'
        from C:/Program Files/Ruby/lib/ruby/gems/2.1.0/gems/ocra-1.3.3/bin/ocra:
658:in `each'
        from C:/Program Files/Ruby/lib/ruby/gems/2.1.0/gems/ocra-1.3.3/bin/ocra:
658:in `block in find_gem_files'
        from C:/Program Files/Ruby/lib/ruby/gems/2.1.0/gems/ocra-1.3.3/bin/ocra:
611:in `each'
        from C:/Program Files/Ruby/lib/ruby/gems/2.1.0/gems/ocra-1.3.3/bin/ocra:
611:in `find_gem_files'
        from C:/Program Files/Ruby/lib/ruby/gems/2.1.0/gems/ocra-1.3.3/bin/ocra:
728:in `build_exe'
        from C:/Program Files/Ruby/lib/ruby/gems/2.1.0/gems/ocra-1.3.3/bin/ocra:
1165:in `block in <top (required)>'

为什么会这样？如何解决？

最佳答案

我能够使用Ruby版本2.0.0p481和rubygems 2.0.14的Ocra从您的脚本成功构建可执行文件。如果您可以切换Ruby版本，则应该可以获得相同的结果。 (Here's a write-up I did on using multiple Ruby versions on Windows with the awesome uru。)

深潜:

这个io-console问题困扰着许多Ocra gem用户，目前在github上有一个 Unresolved 问题:

https://github.com/larsch/ocra/issues/77

Ocra对脚本中所有已加载的gem调用 Gem::Specification#gem_dir ，其中包括io-console。该操作返回的路径不存在，因此会出现错误。

(这也是rubygems到gem_dir方法的链接，供您引用。)

您可以自己尝试:

irb(main):001:0>require "io/console"
=> true
irb(main):002:0>io_console_spec = Gem.loaded_specs["io-console"]
=> #<Gem::Specification:0xblahblah io-console-0.4.2>
irb(main):003:0>proposed_path = io_console_spec.gem_dir
=> "$YOUR_RUBY_DIRECTORY/lib/ruby/gems/2.1.0/gems/io-console-0.4.2"
irb(main):004:0>File.directory? proposed_path
=> false

当使用Ruby 2.0.0p481时，Ocra通过此脚本成功创建了一个可执行文件:

这使我相信Gem.loaded_specs的结果在rubygems 2.0.14(这是我的2.0.0p481构建中运行的版本)和rubygems 2.2.2(这是我的2.1.5构建中运行的版本)之间的某个地方发生了变化。深入了解为什么Gem::Specification#gem_dir代替io-console是我将要研究的更多内容(我对Ocra和Rubygems的内部工作很陌生)，但希望这会有所帮助。