在您的Gemfile中列出的或本机上可用的任何gem资源中找不到gem'wdm（> = 0.1.0）x64-mingw32'

Question

当我在Git Bash上运行Jekyll服务时，会收到以下警告：

Please add the following to your Gemfile to avoid polling for changes:
gem 'wdm', '>= 0.1.0' if Gem.win_platform?

添加Gemfile后，我又收到一条错误消息。

Could not find gem 'wdm (>= 0.1.0) x64-mingw32' in any of the gem sources
listed in your Gemfile or available on this machine.

我尝试安装Ruby Devkit来解决此问题，但最终得到以下错误消息。

$ ruby dk.rb install
[INFO] Skipping existing gem override for 'C:/Ruby200-x64'
[WARN] Skipping existing DevKit helper library for 'C:/Ruby200-x64'

$ gem install json --platform=ruby
ERROR: Error installing json:
The 'json' native gem requires installed build tools.

Please update your PATH to include build tools or download the DevKit
from 'http://rubyinstaller.org/downloads' and follow the instructions
at 'http://github.com/oneclick/rubyinstaller/wiki/Development-Kit'

Answer 1

看来您之前已经安装过devkit，但它会跳过新安装，请尝试

ruby dk.rb install --force

Answer 2

在将wdm gem添加到Gemfile进行下载后，需要运行bundle install 。