Sass::Files

     # File lib/sass/files.rb, line 69
 69:     def find_file_to_import(filename, load_paths)
 70:       was_sass = was_scss = false
 71:       original_filename = filename
 72: 
 73:       if [".sass", ".scss"].include?(filename[5..1])
 74:         was_sass = filename[5..1] == ".sass"
 75:         was_scss = filename[5..1] == ".scss"
 76:         filename = filename[0...5]
 77:       elsif filename[4..1] == ".css"
 78:         return filename
 79:       end
 80: 
 81:       new_filename = nil
 82:       load_paths = load_paths.uniq
 83:       load_paths.each do |load_path|
 84:         new_filename ||= find_full_path("#{filename}.sass", load_path) unless was_scss
 85:         new_filename ||= find_full_path("#{filename}.scss", load_path) unless was_sass
 86:       end
 87: 
 88:       return new_filename if new_filename
 89:       unless was_sass || was_scss
 90:         Haml::Util.haml_warn WARNING: Neither #{filename}.sass nor .scss found. Using #{filename}.css instead.This behavior is deprecated and will be removed in a future version.If you really need #{filename}.css, import it explicitly.
 91:         return filename + '.css'
 92:       end
 93: 
 94:       message = "File to import not found or unreadable: #{original_filename}.\n"
 95:       if load_paths.size == 1
 96:         message << "Load path: #{load_paths.first}"
 97:       else
 98:         message << "Load paths:\n  " << load_paths.join("\n  ")
 99:       end
100: 
101:       raise SyntaxError.new(message)
102:     end

    # File lib/sass/files.rb, line 19
19:     def tree_for(filename, options)
20:       default_options = Sass::Engine::DEFAULT_OPTIONS.dup
21:       default_options.delete(:syntax)
22:       options = default_options.merge!(options)
23:       text = File.read(filename)
24: 
25:       if options[:cache] || options[:read_cache]
26:         compiled_filename = sassc_filename(filename, options)
27:         sha = Digest::SHA1.hexdigest(text)
28: 
29:         if root = try_to_read_sassc(filename, compiled_filename, sha)
30:           root.options = options.merge(:filename => filename)
31:           return root
32:         end
33:       end
34: 
35:       options = options.merge(:filename => filename)
36:       if filename =~ /\.scss$/
37:         options = {:syntax => :scss}.merge(options)
38:       elsif filename =~ /\.sass$/
39:         options = {:syntax => :sass}.merge(options)
40:       end
41: 
42:       engine = Sass::Engine.new(text, options)
43: 
44:       root = engine.to_tree
45:       try_to_write_sassc(root, compiled_filename, sha, options) if options[:cache]
46:       root
47:     end

     # File lib/sass/files.rb, line 143
143:     def find_full_path(filename, load_path)
144:       partial_name = File.join(File.dirname(filename), "_#{File.basename(filename)}")
145: 
146:       if Pathname.new(filename).absolute?
147:         [partial_name, filename].each do |name|
148:           return name if File.readable?(name)
149:         end
150:         return nil
151:       end
152: 
153:       [partial_name, filename].each do |name|
154:         full_path = File.join(load_path, name)
155:         return full_path if File.readable?(full_path)
156:       end
157:       nil
158:     end

     # File lib/sass/files.rb, line 110
110:     def sassc_filename(filename, options)
111:       File.join(options[:cache_location],
112:         Digest::SHA1.hexdigest(File.dirname(File.expand_path(filename))),
113:         File.basename(filename) + 'c')
114:     end

     # File lib/sass/files.rb, line 116
116:     def try_to_read_sassc(filename, compiled_filename, sha)
117:       return unless File.readable?(compiled_filename)
118: 
119:       File.open(compiled_filename, "rb") do |f|
120:         return unless f.readline("\n").strip == Sass::VERSION
121:         return unless f.readline("\n").strip == sha
122:         return Marshal.load(f.read)
123:       end
124:     rescue EOFError, TypeError, ArgumentError => e
125:       Haml::Util.haml_warn "Warning. Error encountered while reading cache #{compiled_filename}: #{e}"
126:     end

     # File lib/sass/files.rb, line 128
128:     def try_to_write_sassc(root, compiled_filename, sha, options)
129:       return unless File.writable?(File.dirname(options[:cache_location]))
130:       return if File.exists?(options[:cache_location]) && !File.writable?(options[:cache_location])
131:       return if File.exists?(File.dirname(compiled_filename)) && !File.writable?(File.dirname(compiled_filename))
132:       return if File.exists?(compiled_filename) && !File.writable?(compiled_filename)
133:       FileUtils.mkdir_p(File.dirname(compiled_filename))
134:       File.open(compiled_filename, "wb") do |f|
135:         f.write(Sass::VERSION)
136:         f.write("\n")
137:         f.write(sha)
138:         f.write("\n")
139:         f.write(Marshal.dump(root))
140:       end
141:     end