##
# 'googletest' script to check if Google Unit Test library is installed.  If not,
# get it and install it
#
##

import os

Import('env')

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

targets_need_gtest = ['darwin','linux']
gtest_dir      = src_dir + '/extlibs/gtest/gtest-1.7.0'
gtest_zip_file = src_dir + '/extlibs/gtest/gtest-1.7.0.zip'
gtest_url      = 'https://googletest.googlecode.com/files/gtest-1.7.0.zip'

if target_os in targets_need_gtest:
	print '*** Checking for installation of google unit test 1.7.0 ***'

	if not os.path.exists(gtest_dir):
		# If the gtest zip file is not already present, download it
		if not os.path.exists(gtest_zip_file):
			gtest_zip = env.Download(gtest_zip_file, gtest_url)
		else:
			gtest_zip = gtest_zip_file

		# Unzip gtest
		print 'Unzipping google unit test'
		env.UnpackAll(gtest_dir, gtest_zip)


if target_os == 'darwin':
	if os.path.exists(gtest_dir):
		# Build gtest and store it at a temporary directory
		gtest_lib_dir = gtest_dir + '/lib'
		gtest_dotlib_dir = gtest_lib_dir + '/.libs'

        if not os.path.exists(gtest_lib_dir):
#			print 'Create a directory'
#			os.mkdir(gtest_lib_dir)


			print 'Invoke cmake command to generate appropriate make files'
			env.Configure(gtest_dir, './configure')

			# Run make on gtest
			print 'Making google unit test'
			env.Configure(gtest_dir, 'make')

#			print 'Create a directory'
#			os.mkdir(gtest_dotlib_dir)

			print 'Change to a directory'
			os.chdir(gtest_dotlib_dir)

##			print 'Change to a directory'
#			os.chdir(gtest_lib_dir)

			print 'Create hard links pointing to gtest libraries'
			os.link('libgtest.a', gtest_lib_dir + 'libgtest.a')
			os.link('libgtest_main.a', gtest_lib_dir +  'libgtest_main.a')
			print 'Create hard links pointing to gtest libraries - DONE'


elif target_os == 'linux':
	if os.path.exists(gtest_dir):
		if not os.path.exists(gtest_dir + "/lib"):
			# Run configure on gtest
			print 'Configuring google unit test'
			if env.get('CROSS_COMPILE'):
				env.Configure(gtest_dir, './configure --host=' + env['CROSS_COMPILE'])
			else:
				env.Configure(gtest_dir, './configure')

			# Run make on gtest
			print 'Making google unit test'
			env.Configure(gtest_dir, 'make')