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#!/usr/bin/env python3
#
# Copyright (C) 2016 Codethink Limited
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
#
# Authors:
# Tristan Van Berkom <tristan.vanberkom@codethink.co.uk>
import os
import shutil
import subprocess
#
# Private module declaring some info about where the buildstream
# is installed so we can lookup package relative resources easily
#
# The package root, wherever we are running the package from
root = os.path.dirname(os.path.abspath(__file__))
# The Element plugin directory
element_plugins = os.path.join(root, 'plugins', 'elements')
# The Source plugin directory
source_plugins = os.path.join(root, 'plugins', 'sources')
# Default user configuration
default_user_config = os.path.join(root, 'data', 'userconfig.yaml')
# Default project configuration
default_project_config = os.path.join(root, 'data', 'projectconfig.yaml')
# Script template to call module building scripts
build_all_template = os.path.join(root, 'data', 'build-all.sh.in')
# Module building script template
build_module_template = os.path.join(root, 'data', 'build-module.sh.in')
# Cached bwrap version
_bwrap_major = None
_bwrap_minor = None
_bwrap_patch = None
# check_bwrap_version()
#
# Checks the version of installed bwrap against the requested version
#
# Args:
# major (int): The required major version
# minor (int): The required minor version
# patch (int): The required patch level
#
# Returns:
# (bool): Whether installed bwrap meets the requirements
#
def check_bwrap_version(major, minor, patch):
# pylint: disable=global-statement
global _bwrap_major
global _bwrap_minor
global _bwrap_patch
# Parse bwrap version and save into cache, if not already cached
if _bwrap_major is None:
bwrap_path = shutil.which('bwrap')
if not bwrap_path:
return False
cmd = [bwrap_path, "--version"]
version = str(subprocess.check_output(cmd).split()[1], "utf-8")
_bwrap_major, _bwrap_minor, _bwrap_patch = map(int, version.split("."))
# Check whether the installed version meets the requirements
if _bwrap_major > major:
return True
elif _bwrap_major < major:
return False
else:
if _bwrap_minor > minor:
return True
elif _bwrap_minor < minor:
return False
else:
return _bwrap_patch >= patch
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