Not possible to build ruby project with middleman

Question

I am doing the following:

gonvaled@pegasus $ bundle exec 'middleman build --verbose'

...
== Finishing Request: pages/forms/forms.html (0.04s)
      update  build/pages/forms/forms.html
       error  build/javascripts/vendor/jquery.easy-pie-chart

/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/external_runtime.rb:142:in `exec_runtime'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/external_runtime.rb:28:in `block in exec'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/external_runtime.rb:41:in `compile_to_tempfile'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/external_runtime.rb:27:in `exec'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/external_runtime.rb:19:in `eval'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/external_runtime.rb:33:in `call'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/coffee-script-2.2.0/lib/coffee_script.rb:57:in `compile'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/tilt-1.3.7/lib/tilt/coffee.rb:46:in `evaluate'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/tilt-1.3.7/lib/tilt/template.rb:77:in `render'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/sprockets-2.10.0/lib/sprockets/context.rb:197:in `block in evaluate'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/sprockets-2.10.0/lib/sprockets/context.rb:194:in `each'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/sprockets-2.10.0/lib/sprockets/context.rb:194:in `evaluate'
/home/gonvaled/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/sprockets-2.10.0/lib/sprockets/processed_asset.rb:12:in `initialize'
...

Lots of things are building properly, but some are failing like this one. I have no idea what is failing: ruby does not mention any specific problem with the input file: the jquery.easy-pie-chart.coffee seems ok.

What can I try to debug this? I am new to ruby and middleman.

Answer 1

My system had an (spurious) executable called nodejs in the PATH, and it was preventing the real nodejs to run. No messages about this where provided, so it was really difficult to find.

Answer 2

You may need to install a javascript runtime, like therubyracer.