#!/usr/bin/env python
# encoding: utf-8
# Tom Wambold tom5760 gmail
# Thomas Nagy, 2010 (ita)

"""
if libgmp is present, try building with 'waf --exe'
"""

top = '.'
out = 'build'

def options(opt):
	opt.add_option('--exe', action='store_true', default=False, help='Execute the program after it is compiled')

def configure(ctx):
	ctx.load('go')

	# the compiler keeps changing, think twice before trying it for a serious project
	ctx.env.TRY_CGO = False

	return
	try:
		ctx.load('gcc')
		ctx.check_cc(fragment='#include <gmp.h>\nint main() {return 0;}\n', uselib_store='GMP', lib='gmp')
	except ctx.errors.ConfigurationError:
		ctx.env.TRY_CGO = False
	else:
		ctx.env.TRY_CGO = True

def build(ctx):

	ctx(
		features = 'go gopackage',
		target   = 'other',
		source   = [
			'other/a.go',
			'other/b.go', # gopack sux
		],
	)

	ctx(
		features = 'go goprogram',
		target   = 'test',
		use      = 'other',
		source   = 'main.go',
		includes = '.',
	)

	# NOTE: if you use ant_glob, use it like this:     bld.path.ant_glob('*.go', excl='*_test.go')

	if ctx.env.TRY_CGO:
		ctx.read_shlib('gmp')
		ctx(
			features = 'c cshlib',
			source   = 'my-c-lib/src/foo.c',
			target   = 'my-c-lib',
			includes = 'my-c-lib/includes',
			export_includes=['my-c-lib/includes'],
			)
		ctx(
			features = 'cgopackage',
			name     = 'go-gmp',
			target   = 'gmp',
			source   = 'gmp.go gmp/impl.go',
			use      = 'gmp',
			)

		# testing multiple cgopackage targets...
		ctx(
			features = 'cgopackage',
			name     = 'go-stdio',
			target   = 'cgo/stdio',
			source   = 'stdio/file.go',
			)

		ctx(
			features = 'cgopackage',
			name     = 'go-my-c-lib',
			target   = 'foo',
			source   = 'my-c-lib.go my-c-lib-2.go',
			use      = ['my-c-lib',],
			)

		#ctx.add_group()
		ctx(features='go goprogram uselib',
			source='pi.go',
			target='pi',
			use='go-gmp',
			#gocflags=['-I.', '-I..'],
			)

		ctx(
			features='go goprogram uselib',
			source='stdio/hello.go',
			target='go-stdio-hello',
			use='go-stdio',
			)

		ctx(
			features='go goprogram uselib',
			source='stdio/fib.go',
			target='go-stdio-fib',
			use='go-stdio',
			)

		ctx(
			features='go goprogram uselib',
			source='stdio/chain.go',
			target='go-stdio-chain',
			use='go-stdio',
			)

		ctx(
			features='go goprogram uselib',
			source='my-cgo-test.go',
			target='my-cgo-test',
			use='go-my-c-lib',
			)

	from waflib import Options, Utils
	if ctx.env.TRY_CGO and Options.options.exe:
		def exe_pi(bld):
			p = Utils.subprocess.Popen('LD_LIBRARY_PATH=build ./build/pi', shell=True)
			p.wait()
		ctx.add_post_fun(exe_pi)

		def exe_hello(bld):
			p = Utils.subprocess.Popen('LD_LIBRARY_PATH=build ./build/go-stdio-hello', shell=True)
			p.wait()
		ctx.add_post_fun(exe_hello)

		def exe_fib(bld):
			p = Utils.subprocess.Popen('LD_LIBRARY_PATH=build ./build/go-stdio-fib', shell=True)
			p.wait()
		ctx.add_post_fun(exe_fib)

		def exe_chain(bld):
			p = Utils.subprocess.Popen('LD_LIBRARY_PATH=build ./build/go-stdio-chain', shell=True)
			p.wait()
		ctx.add_post_fun(exe_chain)

		def exe_mycgolib(bld):
			p = Utils.subprocess.Popen('LD_LIBRARY_PATH=build ./build/my-cgo-test', shell=True)
			p.wait()
		ctx.add_post_fun(exe_mycgolib)