【发布时间】：2015-12-16 00:26:32
【问题描述】：
我是 Ruby 新手，我只是想运行一个脚本。首先，当我尝试捆绑安装时，它说：
Daniels-Air:Documents Daniel$ bundle install
Fetching gem metadata from https://rubygems.org/........
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Resolving dependencies...
Rubygems 2.0.3 is not threadsafe, so your gems will be installed one at a time. Upgrade to Rubygems 2.1.0 or higher to enable parallel gem installation.
Installing ffi 1.9.10 with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/include/ruby.h
Gem files will remain installed in /var/folders/_r/8pxmrph95fj0km8h7sfkw9f40000gn/T/bundler20151216-21689-8jiqebffi-1.9.10/gems/ffi-1.9.10 for inspection.
Results logged to /var/folders/_r/8pxmrph95fj0km8h7sfkw9f40000gn/T/bundler20151216-21689-8jiqebffi-1.9.10/gems/ffi-1.9.10/ext/ffi_c/gem_make.out
Using multipart-post 2.0.0
Installing json 1.8.3 with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/include/ruby.h
Gem files will remain installed in /var/folders/_r/8pxmrph95fj0km8h7sfkw9f40000gn/T/bundler20151216-21689-5mz4k9json-1.8.3/gems/json-1.8.3 for inspection.
Results logged to /var/folders/_r/8pxmrph95fj0km8h7sfkw9f40000gn/T/bundler20151216-21689-5mz4k9json-1.8.3/gems/json-1.8.3/ext/json/ext/generator/gem_make.out
Using multi_json 1.11.2
Using rubyzip 1.1.7
Using websocket 1.2.2
Using bundler 1.11.1
An error occurred while installing ffi (1.9.10), and Bundler cannot continue.
Make sure that `gem install ffi -v '1.9.10'` succeeds before bundling.
当我尝试执行该文件时，我遇到了问题：
Could not find gem 'faraday' in any of the gem sources listed in your Gemfile or available on this machine.
Run `bundle install` to install missing gems.
我从哪里得到这个“法拉第”宝石？它应该与我尝试运行的代码一起提供，还是应该更新一些东西？抱歉，如果我弄错了一些术语，我对 Ruby 很陌生。
【问题讨论】：