Compiles coffeescripts to js in the background, preserving directory structure

compile-coffeescript.watchr

# Run me with:
#   $ watchr compile.watchr

# --------------------------------------------------
# Rules
# --------------------------------------------------
watch( '^Resources/cs/(.*\.coffee)'                       )  { |m| coffee m }


# --------------------------------------------------
# Signal Handling
# --------------------------------------------------
Signal.trap('INT' ) { abort("\n") } # Ctrl-C
Signal.trap('QUIT' ) { coffee everything } # Ctrl-\

# --------------------------------------------------
# Helpers
# --------------------------------------------------

def coffee(*paths)
  if paths[0].is_a?(Array)
    paths = paths[0]
  end
  paths.each do |i|  
    if (i.is_a?(MatchData))
      input = i[0].to_s
      output_dir = i[0].to_s
    else
      puts "#{i}\n"
      input = i.clone
      output_dir = i.clone
    end
    output_dir.sub!(/\/(\w*\.coffee)/, '')
    output_dir.sub!(/cs/, 'js')
    FileUtils.mkdir_p output_dir
    run "coffee -c -o #{output_dir} #{input}"
  end
end

def everything
  scripts = Dir['Resources/cs/**/*.coffee']
  scripts.flatten
end

def run( cmd )
  puts   cmd
  puts system cmd
end

That doesn't preserve the directory structure. If you have a tree of coffeescript files and would like it to translate into a tree of javascript files, the coffee command will not work. Every way i tried it, all files were outputted at the same depth in the output directory.

E.g.
coffeescripts/
--lib/
-- -- file1.coffee
-- -- file2.coffee
--models/
-- -- model1.coffee
--widgets/
-- -- checkbox.coffee
-- -- selector.coffee

coffee -wc -o js coffeescripts will output
js/
-- file1.js
-- selector.coffee
...etc.

The latest stable CoffeeScript (0.9.5 at this time) preserves the structure in --watch mode. Just tried it with the tree above:

% coffee -wc -o js coffeescripts
Compiled coffeescripts/lib/file2.coffee
Compiled coffeescripts/lib/file1.coffee
Compiled coffeescripts/models/file2.coffee
Compiled coffeescripts/widgets/checkbox.coffee
Compiled coffeescripts/widgets/selector.coffee

 % tree
.
├── coffeescripts
│   ├── lib
│   │   ├── file1.coffee
│   │   └── file2.coffee
│   ├── models
│   │   └── file2.coffee
│   └── widgets
│       ├── checkbox.coffee
│       └── selector.coffee
└── js
    ├── lib
    │   ├── file1.js
    │   └── file2.js
    ├── models
    │   └── file2.js
    └── widgets
        ├── checkbox.js
        └── selector.js

8 directories, 10 files

Give it a spin and if it still isn't working, post an issue on Github perhaps? I am sure it is can be fixed.

I was using 0.9.4! Thanks!