Ruby错误：无法加载此类文件--wdm（LoadError）

Question

我在Windows上遇到了一些与Jekyll有关的重大问题。 我终于开始工作，所以我跑了

jekyll build

然后

jekyll服务 - 观察

然后我得到以下错误，任何人都可以帮忙吗？

完整的错误是：

C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require':
cannot load such file -- wdm (LoadError)
        from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:i
n `require'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:207:in `load_dependent_adapter'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
s/windows.rb:33:in `load_dependent_adapter'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:198:in `usable?'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
s/windows.rb:25:in `usable?'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:190:in `usable_and_works?'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:57:in `block in select_and_initialize'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:55:in `each'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:55:in `select_and_initialize'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/listene
r.rb:291:in `initialize_adapter'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/listene
r.rb:283:in `setup'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/listene
r.rb:52:in `start'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/jekyll-1.4.0/lib/jekyll/command
s/build.rb:56:in `watch'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/jekyll-1.4.0/lib/jekyll/command
s/build.rb:8:in `process'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/jekyll-1.4.0/bin/jekyll:97:in `
block (2 levels) in <top (required)>'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/c
ommand.rb:180:in `call'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/c
ommand.rb:180:in `call'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/c
ommand.rb:155:in `run'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/r
unner.rb:402:in `run_active_command'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/r
unner.rb:66:in `run!'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/d
elegates.rb:11:in `run!'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/i
mport.rb:10:in `block in <top (required)>'

Answer 1

我有同样的问题。 通过设置“Windows目录监视器”非常简单地解决了这个问题。

gem install wdm

并在Gemfile中包含以下行：

gem 'wdm'

祝好运！

Answer 2

你好像在一个非常老的listen gem版本（1.3.1）上运行。 尝试更新到最新版本（2.4.0）

$ gem update listen

在你的Gemfile ：

require 'rbconfig'

gem 'listen', '~> 2.4'
gem 'wdm', '>= 0.1.0' if RbConfig::CONFIG['target_os'] =~ /mswin|mingw|cygwin/i

添加了gem wdm，因为我不确定listen gem是否会自己需要它，但是因为readme声明这是可选的，否则它将回退到轮询，这是一种效率较低的方法。

Answer 3

这篇博文说：

# If you get the following error with the –watch option

C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter.rb:207:in `require': cannot load such file -- wdm (LoadError)

# To fix that error, open the gemfile in your jekyll project directory and add these two lines:

require 'rbconfig'
gem 'wdm', '>= 0.1.0' if RbConfig::CONFIG['target_os'] =~ /mswin|mingw/i