Add task for generating ctags

lib/tasks/ctags.rake

@@ -0,0 +1,29 @@
+module Kosmos
+  class Ctags
+    def self.generate_app_tags
+      excludes = %w[.git gitno log tmp public].join(" --exclude ")
+      cmd = "ctags -R --languages=ruby --exclude #{excludes} ."
+      system cmd
+    end
+
+    def self.generate_bundler_tags
+      runtime = ::Bundler::Runtime.new Dir.pwd, ::Bundler.definition
+      paths = runtime.specs.map(&:full_gem_path)
+      generate_tags(paths, "gems.tags")
+    end
+
+    def self.generate_tags(paths, tag_file)
+      paths = paths.join(' ').strip
+      cmd = "find #{paths} -ignore_readdir_race -type f -name '*.rb' 2>/dev/null | ctags -f #{tag_file} -L -"
+      system cmd
+    end
+  end
+end
+
+namespace :ctags do
+  desc 'generate ctags'
+  task :create do
+    Kosmos::Ctags.generate_app_tags
+    Kosmos::Ctags.generate_bundler_tags
+  end
+end