rails-graph.erb

#!/usr/bin/env erb
<%
stats = `bundle --local | tail -n2 | head -n1`.scan(/[0-9]+/)
def files_for(ext)
  Dir.glob('**/*.' + ext)
end

def size_for(ext)
  files_for(ext).map{|f| File.size(f) }.inject(:+).to_i
end
%>
digraph graphname {
        direct_gems [label="Direct gems <%= stats.first %>"]
        indirect_gems [label="Indirect gems <%= stats.last %>"]

        initializers [label="<%= Dir.glob('config/initializers/*.rb').count %> initializers"]
        dev_initializers [label="<%= `rake initializers`.lines.count %> Development initializers"]
        prod_initializers [label="<%= `RAILS_ENV=production rake initializers`.lines.count %> Production initializers"]

        { rank=same; initializers dev_initializers prod_initializers }

        dev_middlewares [label="<%= `rake middleware`.lines.count %> Development middlewares"]
        prod_middlewares [label="<%= `RAILS_ENV=production rake middleware`.lines.count %> Production middlewares"]


        controllers [label="Controllers: <%= Dir.glob('app/controllers/**/*_controller.rb').count %>"]
        models [label="Models: <%= Dir.glob('app/models/**/*.*').reject{|f| f.include?('concern') }.count %>"]
        views [label="Views: <%= Dir.glob('app/views/**/*.*').count %>"]

        routes [label="Routes <%= `rake routes`.lines.count - 1 %>"]


        indirect_gems -> direct_gems -> initializers -> routes
        direct_gems -> dev_initializers -> dev_middlewares -> routes
        direct_gems -> prod_initializers -> prod_middlewares -> routes

        routes -> controllers

        controllers -> models
        controllers -> views

        js [label="JS: <%= files_for('js').count %> Files, <%= size_for('js') / 1024 %> KB"]
        scss [label="SCSS: <%= files_for('scss').count %> Files, <%= size_for('scss') / 1024 %> KB"]
        png [label="PNG: <%= files_for('png').count %> Files, <%= size_for('png') / 1024 %> KB"]
        jpg [label="JPG: <%= files_for('jpg').count %> Files, <%= size_for('jpg') / 1024 %> KB"]

        views -> assets
        assets -> js
        assets -> scss
        assets -> png
        assets -> jpg

}