Rakefile to concatenate templates and js files together

Rakefile

require 'rake'

task :default => :compile_templates

task :clean_compiled_file do
    if File.exist?('release.js')
        File.unlink('release.js')
    end
end

task :compile_js => :clean_compiled_file do
    out = ""
    Dir['js/*'].each do |file|
        out += File.read(file)
    end

    File.open("release.js", 'a') { |file|
        file.write(out)
    }
    puts "done concatenating files"
end

task :compile_templates => :compile_js do
    templates = ""
    Dir['templates/*'].each do |file|
        templates += "Minitape." + File.basename(file).split(".")[0] + "_template = \"" + File.read(file).gsub("\n", "").gsub(" ", "") + "\";"
    end
    
    File.open("release.js", 'a') { |file|
        file.write(templates)
    }

    puts "done compiling templates"
end