lib/sourcemaps.rb in vitrine-0.0.17 vs lib/sourcemaps.rb in vitrine-0.0.18

@@ -1,9 +1,52 @@
 require 'pathname'
 require 'json'
 
 module Vitrine
   
+  # We need to override the Sass importer
+  # so that it gives us URLs relative to the server root for sourcemaps
+  class Imp < Sass::Importers::Filesystem
+    def public_url(of_filesystem_path)
+      scss_uri = '/' + Pathname.new(of_filesystem_path).relative_path_from(Pathname.new(root)).to_s
+    end
+  end
+  
+  # Compile a SASS/SCSS file to CSS
+  def self.compile_sass_and_sourcemap(scss_path, public_folder_path)
+    # Compute the paths relative to the webserver public root
+    scss_uri = '/' + Pathname.new(scss_path).relative_path_from(Pathname.new(public_folder_path)).to_s
+    css_uri = scss_uri.gsub(/\.scss$/, '.css')
+    sourcemap_uri= css_uri + '.map'
+    
+    engine_opts = {importer: Imp.new(public_folder_path), sourcemap: true, cache: false}
+    map_options = {css_path: css_uri, sourcemap_path: sourcemap_uri }
+    
+    engine = Sass::Engine.for_file(scss_path, engine_opts)
+    
+    # Determine the sourcemap URL for the SASS file
+    rendered, mapping = engine.render_with_sourcemap(sourcemap_uri)
+    
+    # Serialize the sourcemap
+    # We need to pass css_uri: so that the generated sourcemap refers to the
+    # file that can be pulled of the server as opposed to a file on the filesystem
+    sourcemap_body = mapping.to_json(map_options)
+    
+    [rendered, sourcemap_body]
+  end
+  
+  # Compile SASS and return the source map only
+  def self.compile_sass_source_map(scss_path, public_folder_path)
+    css, map = compile_sass_and_sourcemap(scss_path, public_folder_path)
+    map
+  end
+  
+  # Compiles SASS and it's sourcemap and returns the CSS only
+  def self.compile_sass(scss_path, public_folder_path)
+    css, map = compile_sass_and_sourcemap(scss_path, public_folder_path)
+    css
+  end
+  
   # Compile a script (String or IO) to JavaScript.
   # This is a version lifted from here
   # https://github.com/josh/ruby-coffee-script/blob/114b65b638f66ba04b60bf9c24b54360260f9898/lib/coffee_script.rb
   # which propagates error line
   def self.compile_coffeescript(script, options = {})
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