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#!/usr/bin/env python
"""Asterisk Build Options Handling
This module implements an Asterisk build options parser. It
tracks what build options Asterisk was compiled with, and returns
whether or not a particular build option was enabled.
Copyright (C) 2011-2012, Digium, Inc.
Matt Jordan <mjordan@digium.com>
This program is free software, distributed under the terms of
the GNU General Public License Version 2.
"""
import sys
import unittest
class AsteriskBuildOptions(object):
"""Tracks the build options for an instance of Asterisk"""
def __init__(self, path=None):
"""Construct an instance of AsteriskBuildOptions
Keyword Arguments:
path The path to locate the buildopts.h file under
"""
self._flags = {}
buildopts_hdr_paths = [
"../include/asterisk/buildopts.h",
"/usr/include/asterisk/buildopts.h",
"/usr/local/include/asterisk/buildopts.h"
]
if path:
buildopts_hdr_paths.insert(0, path)
for hdr_path in buildopts_hdr_paths:
if (self.__parse_buildopts_file(hdr_path)):
return
raise Exception("Failed to open any build options files")
def __parse_buildopts_file(self, path):
"""Extract and parse the build options"""
ret_val = False
file_lines = []
try:
with open(path, "r") as build_opt_file:
file_lines = build_opt_file.readlines()
except IOError:
return ret_val
except:
print "Unexpected error: %s" % sys.exc_info()[0]
return ret_val
for line in file_lines:
if "#define" in line:
define_tuple = line.partition(' ')[2].partition(' ')
if (define_tuple[0] == "" or define_tuple[2] == ""):
msg = ("Unable to parse build option line [%s] into "
"compiler flag token and value" % line)
print msg
else:
flag = define_tuple[0].strip()
allowed = define_tuple[2].strip()
self._flags[flag] = allowed
ret_val = True
return ret_val
def check_option(self, build_option, expected_value="1"):
"""
Checks if a build option has been set to an expected value
Keyword Arguments:
build_option The Asterisk build option set in buildopts.h to check for
expected_value The value the option should have. Default is 1.
Note: if the buildOption's expectedValue is "0" (for not defined), then
this method will return True if either the buildOption does not exist OR
if it exists and matches.
Returns:
True if the build option exists and the expected value matches;
false otherwise
"""
if build_option in self._flags.keys():
return expected_value == self._flags[build_option]
elif expected_value == "0":
return True
return False
class AsteriskBuildOptionsTests(unittest.TestCase):
"""Unit tests for AsteriskBuildOptions"""
def test_1(self):
"""Test the defaults paths"""
build_options = AsteriskBuildOptions()
self.assertTrue(1)
def main():
"""Main entry point for unit tests"""
unittest.main()
if __name__ == "__main__":
main()
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