### Monkeypatch to work around the broken Rakefile generated by Mkrf <= 0.2.3

# This fixes:

# * Some weird unnecessary string interpolation

# * The :install task doesn't work unless you have RUBYARCHDIR in your environment, instead of

#   falling back to CONFIG['sitearchdir'].

# * The :install task created the target install directory every time instead of just

#   declaring a dependency on a directory task

require 'mkrf/generator'

RAKEFILE_TEMPLATE = %q{

	# Generated by monkeypatched mkrf

	require 'rake/clean'

	require 'rbconfig'

	include Config

	SRC = FileList[#{sources.join(',')}]

	OBJ = SRC.ext('#{objext}')

	CC = '#{@cc}'

	ADDITIONAL_OBJECTS = '#{objects}'

	LDSHARED = "#{@available.ldshared_string} #{ldshared}"

	LIBPATH =  "#{library_path(CONFIG['libdir'])} #{@available.library_paths_compile_string}"

	INCLUDES = "#{@available.includes_compile_string}"

	LIBS = "#{@available.library_compile_string}"

	CFLAGS = "#{cflags} #{defines_compile_string}"

	RUBYARCHDIR = ENV["RUBYARCHDIR"] || CONFIG['sitearchdir']

	LIBRUBYARG_SHARED = "#{CONFIG['LIBRUBYARG_SHARED']}"

	EXT = '#{@extension_name}'

	CLEAN.include( EXT, '*.#{objext}' )

	CLOBBER.include( 'mkrf.log' )

	task :default => EXT

	rule '.#{objext}' => '.#{@source_extension}' do |t|

	  sh "\#{CC} \#{CFLAGS} \#{INCLUDES} -c \#{t.source}"

	end

	desc "Build this extension"

	file EXT => OBJ do

	  sh "\#{LDSHARED} \#{LIBPATH} #{@available.ld_outfile(@extension_name)} \#{OBJ} \#{ADDITIONAL_OBJECTS} \#{LIBS} \#{LIBRUBYARG_SHARED}"

	end

	directory RUBYARCHDIR

	desc "Install this extension"

	task :install => [EXT, RUBYARCHDIR] do

	  install EXT, RUBYARCHDIR, :verbose => true

	end

	#{additional_code}

}.gsub( /^\t/m, '' )

module Mkrf

	class Availability

		def silence_stream( stream )

			old_stream = stream.dup

			stream.reopen( @logger.instance_variable_get(:@logdev).dev )

			stream.sync = true

			yield

		ensure

			stream.reopen( old_stream )

		end

	end

	class Generator

		def rakefile_contents # :nodoc:

			objext = CONFIG['OBJEXT']

			return interpolate( RAKEFILE_TEMPLATE, binding() )

		end

		### Interpolate any '#{...}' placeholders in the string within the given

		### +scope+ (a Binding object).

	    def interpolate( string, scope )

	        unless scope.is_a?( Binding )

	            raise TypeError, "Argument to interpolate must be a Binding, not "\

	                "a #{scope.class.name}"

	        end

			# $stderr.puts ">>> Interpolating '#{self}'..."

	        copy = string.gsub( /"/, %q:\": )

	        eval( '"' + copy + '"', scope )

		rescue Exception => err

			nicetrace = err.backtrace.find_all {|frame|

				/in `(interpolate|eval)'/i !~ frame

			}

			Kernel.raise( err, err.message, nicetrace )

	    end

	end # class Generator

end # module Mkrf