##
# Script to generate ASN.1 source code.
# If asn1 compiler is not installed get it and install it.
#
##

import os

Import('env')

asn1_env = env.Clone()

target_os = asn1_env.get('TARGET_OS')
src_dir = asn1_env.get('SRC_DIR')

targets_need_asn1 = ['linux']
asn1c_dir      = src_dir + '/extlibs/asn1cert/asn1c-0.9.27'
asn1c_gz_file = src_dir + '/extlibs/asn1cert/asn1c-0.9.27.tar.gz'
asn1c_url      = 'http://lionet.info/soft/asn1c-0.9.27.tar.gz'
asn1c_file = src_dir + '/extlibs/asn1cert/asn1c-0.9.27/asn1c/asn1c'

if target_os in targets_need_asn1:
	print '*** Checking for installation of asn1c-0.9.27 ***'

	if not os.path.exists(asn1c_dir):
		# If the asn1 gz file is not already present, download it
		if not os.path.exists(asn1c_gz_file):
			asn1c_gz = asn1_env.Download(asn1c_gz_file, asn1c_url)
		else:
			asn1c_gz = asn1c_gz_file

		# Ungz asn1c
		print 'Unzipping asn1 compiler'
		asn1_env.UnpackAll(asn1c_dir, asn1c_gz)
	if os.path.exists(asn1c_dir):
		if not os.path.exists(asn1c_file):
			# Run configure on asn1
			print 'Configuring asn1 compiler'
			if asn1_env.get('CROSS_COMPILE'):
				asn1_env.Configure(asn1c_dir, './configure --host=' + asn1_env['CROSS_COMPILE'])
			else:
				asn1_env.Configure(asn1c_dir, './configure')

			# Run make on asn1
			print 'Making asn1 compiler'
			asn1_env.Configure(asn1c_dir, 'make')
	print 'Generating Source Code:'
	asn1_env.Configure(src_dir + '/extlibs/asn1cert', './asn1c-0.9.27/asn1c/asn1c certificate.asn')
	asn1_env.Configure(src_dir + '/extlibs/asn1cert', './asn1c-0.9.27/asn1c/asn1c crl.asn')
	asn1_env.Configure(src_dir + '/extlibs/asn1cert', './asn1c-0.9.27/asn1c/asn1c csr.asn')
	asn1_env.Configure(src_dir + '/extlibs/asn1cert', 'rm converter-sample.c')

	#Build asn1 as static library
	asn1_src = Glob('*.c')
	asn1_lib = asn1_env.StaticLibrary('asn1', asn1_src)
	asn1_env.InstallTarget(asn1_lib, 'libasn1')