module Rscons
  class CC < Builder
    VARIABLE_DEFAULTS = {
      'CC' => 'gcc',
      'CFLAGS' => ['-c'],
      'CPPFLAGS' => [],
      'OBJSUFFIX' => '.o',
      'CEXTS' => ['.c'],
    }

    def self.produces?(env, suffix)
      suffix == env['OBJSUFFIX']
    end

    def run(env, target, source)
      raise "String expected, not #{source.inspect}" unless source.is_a?(String)
      o_file = "#{env.stem(source)}#{env['OBJSUFFIX']}"
      unless Cache.open.up_to_date?(target, [source])
        command = [
          env['CC'],
          *env['CPPFLAGS'],
          *env['CFLAGS'],
          '-o', o_file,
          source
        ]
        vars = {
          'TARGET' => o_file,
          'SOURCES' => source,
        }
        env.execute("CC #{o_file}", command, vars)
        Cache.open.register_build(target, [source])
      end
      o_file
    end
  end
end