wscript

#! /usr/bin/env python
# encoding: utf-8

top = '.'
out = 'build'

def a(ctx):
    print('a')

def b(ctx):
    print('b')

def ctx(ctx):
    """
    properties of ctx
    """
    print('ctx')
    print( 'ctx.path.abspath() ==' + ctx.path.abspath() )
    print( 'id(ctx) == %d' % id(ctx) )

def subwaf(ctx):
    """
    call another wscript

    by default searchs for target named `subwaf`
    """
    print('subwaf')
    ctx.recurse('d')

def options(ctx):
        ctx.add_option(
            '--aa',
            action='store',
            default=False,
            help='help'
        )

def configure(ctx):
        print('configure')
        ctx.env.AA = ctx.options.aa
        #check if program exists:
        #- if not say it
        #- if yes, assign it to a variable containing its path
        ctx.find_program('touch', var='TOUCH')
        #ctx.find_program('idontexist', var='IDONTEXIST')

def build(bld):
        print('build')
        print(ctx.env.TOUCH)
        print(ctx.env.FOO)
        bld(rule='${TOUCH} ${TGT}', target='foo.txt')