itsderek23 · August 22, 2012 17:35 · Aug 22, 2012
diff --git a/find_ununsed_assets.rb b/find_ununsed_assets.rb
@@ -0,0 +1,44 @@
+assets_path = File.expand_path("~/projects/rails/scout/public")
+log_path = File.expand_path "~/assets.txt"
+temp_requested_files_path = File.expand_path "~/processed_assets.txt"
+ignore_pattern = /sparkline|datejs/
+
+known_used =[
+    "javascripts/jquery-1.7.1.min.js",
+    "javascripts/jquery.extensions.js",
+    "javascripts/application.js",
+    "stylesheets/default.css",
+    "stylesheets/public.css"
+]
+
+puts "starting"
+Dir.chdir assets_path
+files = %w(js png jpg jpeg gif css).map{|ext| Dir.glob("**/*.#{ext}")}.flatten
+puts "Found #{files.size} assets"
+requested_files =[]
+
+if(File.exist? temp_requested_files_path)
+  puts "#{temp_requested_files_path} exists -- using it"
+  requested_files = File.readlines(temp_requested_files_path).map(&:chomp)
+else
+  puts "#{temp_requested_files_path} does not exist -- processing #{log_path}"
+  log = File.readlines(log_path)
+  puts "read #{log.size} lines from #{log_path}"
+  log_entries=log.map{|l| l.match(/GET \/([^? ]+)/)[1]}
+  requested_files = log_entries.uniq
+  File.open(temp_requested_files_path,"w") {|f| f.puts requested_files}
+end
+
+puts "found #{requested_files.size} requested files in logs"
+puts ""
+
+
+puts "== Local files that aren't requested in production:"
+res = files - requested_files
+res = res.select{|l| !l.match ignore_pattern }
+res = res - known_used
+res.sort.each_with_index do |f,i|
+  cmd = "rm #{assets_path}/#{f}"
+  puts cmd
+  # `#{cmd}` # only uncomment when you're satisfied with the list of files it's going to delete
+end