如何使用ruby gem commonjs加载纯JS文件？ [英] How to load pure JS file using ruby gem commonjs?
问题描述
简单问题：如何从ruby加载纯.js文件？
Simple question: how to load pure .js file from ruby?
我当前的策略是从内部加载.js文件ruby是使用 commonjs gem 。我发现说明是加载 js目录，然后需要文件。不幸的是，当我尝试加载目录以尝试将nil转换为字符串时，我不断收到TypeError。
My current strategy is to load a .js file from within ruby is to use the commonjs gem. I recognize that the instructions are to load the js directory and then require the file. Unfortunately, I keep getting a TypeError when I try to load the directory for trying to convert nil to string.
这是我的文件结构：
.
├── Gemfile
├── LICENSE.md
├── README.md
├── Rakefile
├── lib
│ ├── example
│ │ ├── js
│ │ │ ├── data.json
│ │ │ ├── expressions.js
│ │ │ └── javascript_i_want_to_run.js
│ │ └── version.rb
│ └── example.rb
├── example.gemspec
├── script
└── test
在 commonjs指令，这是我从pry调用时遇到的失败（注意我正在加载目录而不是文件）。
Following the commonjs instructions, here is the failure I get when invoking from pry (notice I'm loading the directory not the file).
[1] pry(main)> require 'commonjs'
=> true
[2] pry(main)> env = CommonJS::Environment.new(path: 'lib/example/js')
TypeError: no implicit conversion of nil into String
from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/commonjs-0.2.7/lib/commonjs/environment.rb:9:in `initialize'
我很难过。有什么想法会发生什么？
I'm stumped. Any ideas what could be happening?
推荐答案
自述文件中有错误。 初始化方法中的第一个参数 CommonJS :: Environment 类是 runtime 。它应该是：
There is a mistake in readme. The first parameter in initialize method of CommonJS::Environment class is runtime. It should be:
require 'commonjs'
require 'v8'
runtime = V8::Context.new
env = CommonJS::Environment.new(runtime, path: 'lib/example/js')
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