summaryrefslogtreecommitdiff
path: root/jni/ruby/lib/rake/loaders/makefile.rb
blob: 4ece4323af864626bfd6db12229413f1c78a1fe1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
module Rake

  # Makefile loader to be used with the import file loader.
  class MakefileLoader
    include Rake::DSL

    SPACE_MARK = "\0"

    # Load the makefile dependencies in +fn+.
    def load(fn)
      lines = File.read fn
      lines.gsub!(/\\ /, SPACE_MARK)
      lines.gsub!(/#[^\n]*\n/m, "")
      lines.gsub!(/\\\n/, ' ')
      lines.each_line do |line|
        process_line(line)
      end
    end

    private

    # Process one logical line of makefile data.
    def process_line(line)
      file_tasks, args = line.split(':', 2)
      return if args.nil?
      dependents = args.split.map { |d| respace(d) }
      file_tasks.scan(/\S+/) do |file_task|
        file_task = respace(file_task)
        file file_task => dependents
      end
    end

    def respace(str)
      str.tr SPACE_MARK, ' '
    end
  end

  # Install the handler
  Rake.application.add_loader('mf', MakefileLoader.new)
end