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# -*- coding: utf-8 -*-
#
# AWL simulator - Code coverage tracing support
#
# Copyright 2018 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
from __future__ import division, absolute_import, print_function, unicode_literals
try:
import coverage as coverage_mod
except ImportError as e:
coverage_mod = None
import os
import sys
import atexit
__all__ = [ ]
coverageInstance = None
def coverageError(msg):
if sys.stderr:
sys.stderr.write(msg + "\n")
sys.stderr.flush()
def coverageTryStart():
global coverageInstance
covPath = os.getenv("AWLSIM_COVERAGE", "")
if covPath:
if not coverage_mod:
coverageError("Code coverage tracing is requested "
"(AWLSIM_COVERAGE), but the Python 'coverage' "
"module was not found. "
"Please install Python 'coverage'.")
return
if not coverageInstance:
atexit.register(coverageStop)
try:
omit = [
"/usr/*",
"awlsim-test",
"awlsim/gui/*",
"awlsim_loader/*",
"libs/*",
"submodules/*",
"tests/*",
]
kwargs = {
"data_file" : covPath,
"auto_data" : True,
"branch" : False,
"check_preimported" : True,
"config_file" : False,
"omit" : omit,
}
for remove in ("", "check_preimported"):
if remove:
kwargs.pop(remove)
try:
coverageInstance = coverage_mod.Coverage(**kwargs)
break
except TypeError:
pass
else:
coverageError("Failed to initialize code "
"coverage tracing. It is unknown how to "
"instantiate Coverage correctly.")
sys.exit(1)
coverageInstance.start()
except coverage_mod.misc.CoverageException as e:
coverageError("Coverage tracing exception: " + str(e))
sys.exit(1)
def coverageStop():
global coverageInstance
if coverageInstance:
try:
coverageInstance.stop()
except coverage_mod.misc.CoverageException as e:
coverageError("Coverage tracing exception: " + str(e))
sys.exit(1)
finally:
coverageInstance = None
coverageTryStart()
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