Windows 7, Middleman 3.1.3

[keeganstreet]

Hi,

I get an error when running Middleman on Windows 7.

Ruby version: ruby 2.0.0p195 (2013-05-14) [x64-mingw32]

Middleman version: 3.1.3

Error:

== The Middleman is loading
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/adapter.rb:207:i
n `require': cannot load such file -- wdm (LoadError)
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/ada
pter.rb:207:in `load_dependent_adapter'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/ada
pters/windows.rb:33:in `load_dependent_adapter'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/ada
pter.rb:198:in `usable?'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/ada
pters/windows.rb:25:in `usable?'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/ada
pter.rb:190:in `usable_and_works?'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/ada
pter.rb:57:in `block in select_and_initialize'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/ada
pter.rb:55:in `each'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/ada
pter.rb:55:in `select_and_initialize'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/lis
tener.rb:288:in `initialize_adapter'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/lis
tener.rb:280:in `setup'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/listen-1.2.2/lib/listen/lis
tener.rb:52:in `start'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/middleman-core-3.1.3/lib/mi
ddleman-core/preview_server.rb:127:in `start_file_watcher'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/middleman-core-3.1.3/lib/mi
ddleman-core/preview_server.rb:175:in `mount_instance'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/middleman-core-3.1.3/lib/mi
ddleman-core/preview_server.rb:20:in `start'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/middleman-core-3.1.3/lib/mi
ddleman-core/cli/server.rb:73:in `server'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor/comman
d.rb:27:in `run'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor/invoca
tion.rb:120:in `invoke_command'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor.rb:363
:in `dispatch'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor/base.r
b:439:in `start'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/middleman-core-3.1.3/lib/mi
ddleman-core/cli.rb:77:in `method_missing'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor/comman
d.rb:29:in `run'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor/comman
d.rb:128:in `run'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor/invoca
tion.rb:120:in `invoke_command'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor.rb:363
:in `dispatch'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor/base.r
b:439:in `start'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/middleman-core-3.1.3/lib/mi
ddleman-core/cli.rb:22:in `start'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/middleman-core-3.1.3/bin/mi
ddleman:18:in `<top (required)>'
        from C:/Ruby200-x64/bin/middleman:23:in `load'
        from C:/Ruby200-x64/bin/middleman:23:in `<main>'

List of installed bundles:

Using i18n (0.6.4)
Using multi_json (1.7.7)
Using activesupport (3.2.12)
Using chunky_png (1.2.8)
Using coffee-script-source (1.6.2)
Using execjs (1.4.0)
Using coffee-script (2.2.0)
Using fssm (0.2.10)
Using sass (3.2.9)
Using compass (0.12.2)
Using ffi (1.9.0)
Using tilt (1.3.7)
Using haml (4.0.3)
Using hike (1.2.3)
Using kramdown (1.0.2)
Using rb-fsevent (0.9.3)
Using rb-inotify (0.9.0)
Using rb-kqueue (0.2.0)
Using listen (1.2.2)
Using bundler (1.3.5)
Using rack (1.5.2)
Using rack-test (0.6.2)
Using thor (0.18.1)
Using middleman-core (3.1.3)
Using middleman-more (3.1.3)
Using sprockets (2.10.0)
Using sprockets-helpers (1.0.1)
Using sprockets-sass (1.0.1)
Using middleman-sprockets (3.1.2)
Using uglifier (2.1.1)
Using middleman (3.1.3)

Can you please advise what is going wrong?

[keeganstreet]

I updated my Gemfile so it looks like this:

gem "wdm", "~>0.1.0"
gem "middleman", "~>3.1.3"

And now it works.

Maybe you need to add wdm to the Middleman Gemfile?

[tdreyno]

wdm is part of the default Gemfile now, but commented out as it is only for Windows. Was this an older project?

[keeganstreet]

Hey Thomas, this is on a brand new computer. I have just installed Ruby on it today. The project itself is old, yes, but its Gemfile specifies "middleman", "~>3.1.3" so I don't see how it would be trying to use old gem settings.

[tdreyno]

If you were to run middleman init, the Gemfile that generates should now contain wdm (commented out).

[keeganstreet]

Thanks @tdreyno, it does. If we have a project where some developers use Mac and some use Windows, I guess this means we will have to leave the Gemfile and Gemfile.lock out of version control.

[bhollis]

You could do this in your Gemfile:

if RUBY_PLATFORM =~ /win32/
   gem "wdm"
end

Maybe our generated Gemfile should do that.

[keeganstreet]

Oh thanks @bhollis, that sounds like a good solution for the Gemfile. Would it be possible to do anything with the Gemfile.lock? As I understand it is recommended that this file is also checked into version control for Ruby apps (reference: http://yehudakatz.com/2010/12/16/clarifying-the-roles-of-the-gemspec-and-gemfile/).

I think this must be a problem other Ruby apps have solved before. Maybe I shouldn't be checking the Gemfile.lock file into version control for projects that are used on Windows and Mac.

[tdreyno]

Bundler has built-in support for this like so:

gem "wdm", :platforms => [:mswin, :mingw]

[tgdev]

Thanks so much for this. I was having the same issue on my project (I'm also a Windows 7 user).

Upgraded middleman from 3.0.11 to 3.1.3 and got the same error as @keeganstreet. Messed around with this for ages before adding @tdreyno's solution above.

[bhollis]

@tdreyno fixed our Gemfile template to automatically include wdm on Windows platforms in 5806f2cbf53cb9b64a0904b6b91a977d8a8807b7.

[tdreyno]

:+1:

[raghutelkar]

Thanks guys for posting... 'middleman init' really helped me to resolve issues.