#! /usr/bin/env python

"""
The wscript file in this directory uses external commands in the
task execution. We may as well use node objects to write to them
directly.
"""

def configure(ctx):
	pass

from waflib.Task import Task
class cp(Task):
	def run(self):
		txt = self.inputs[0].read()
		self.outputs[0].write(txt)

class cat(Task):
	def run(self):
		txt = self.inputs[0].read() + self.inputs[1].read()
		self.outputs[0].write(txt)

def build(ctx):

	cp_1 = cp(env=ctx.env)
	cp_1.set_inputs(ctx.path.find_resource('wscript'))
	cp_1.set_outputs(ctx.path.find_or_declare('foo.txt'))
	ctx.add_to_group(cp_1)

	cp_2 = cp(env=ctx.env)
	cp_2.set_inputs(ctx.path.find_resource('wscript'))
	cp_2.set_outputs(ctx.path.find_or_declare('bar.txt'))
	ctx.add_to_group(cp_2)

	cat_1 = cat(env=ctx.env)
	cat_1.set_inputs(cp_1.outputs + cp_2.outputs)
	cat_1.set_outputs(ctx.path.find_or_declare('foobar.txt'))
	ctx.add_to_group(cat_1)

	cat_1.set_run_after(cp_1)
	cat_1.set_run_after(cp_2)