ruby – Ocra在打包脚本时会抛出错误

发布时间：2020-12-16 21:04:29 所属栏目：百科来源：网络整理

导读：SCENARIO 我安装了Ruby 2.1.5 (x64)软件包,然后成功安装了Ocra gem： gem install ocraFetching: ocra-1.3.3.gem (100%)Successfully installed ocra-1.3.3Parsing documentation for ocra-1.3.3Installing ri documentation for ocra-1.3.3Done installing

SCENARIO

我安装了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

PROBLEM

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,它会抛出错误：

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)>'

QUESTION

为什么会这样？怎么解决？

解决方法

tl; dr：我能够使用Ocra与Ruby版本2.0.0p481和rubygems 2.0.14从您的脚本成功构建可执行文件.如果你可以切换Ruby版本,你应该能够得到相同的结果. ( Here’s a write-up I did on using multiple Ruby versions on Windows with the awesome uru.)

更深入的潜水：

这个io-console问题困扰了许多Ocra gem的用户,目前在github上有一个未解决的问题：

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

Ocra在脚本中的所有加载的gem上调用Gem::Specification#gem_dir,其中包括io-console.该操作返回不存在的路径,因此返回错误.

(这里也是来自rubygems的gem_dir方法的链接,供您参考.)

你可以自己尝试一下：

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

使用Ruby 2.0.0p481时,Ocra成功地从该脚本创建了一个可执行文件：

这让我相信Gem.loaded_specs的结果已经在rubygems 2.0.14(我的2.0.0p481版本上运行的版本)和rubygems 2.2.2(我的2.1.5版本上运行的版本)之间发生了变化).深入了解为什么Gem :: Specification#gem_dir for io-console是我将要开展的工作(我对Ocra和Rubygems的内部工作非常陌生),但希望这很有帮助.

（编辑：李大同）

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