hadoop/dev-support/docker/pkg-resolver/resolve.py

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#!/usr/bin/env python3
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Platform package dependency resolver for building Apache Hadoop.
"""
import argparse
import json
import sys
from check_platform import is_supported_platform
def get_packages(platform, release=None):
"""
Resolve and get the list of packages to install for the given platform.
:param platform: The platform for which the packages needs to be resolved.
:param release: An optional parameter that filters the packages of the given platform for the
specified release.
:return: A list of resolved packages to install.
"""
with open('pkg-resolver/packages.json', encoding='utf-8', mode='r') as pkg_file:
pkgs = json.loads(pkg_file.read())
packages = []
def process_package(package, in_release=False):
"""
Processes the given package object that belongs to a platform and adds it to the packages
list variable in the parent scope.
In essence, this method recursively traverses the JSON structure defined in packages.json
and performs the core filtering.
:param package: The package object to process.
:param in_release: A boolean that indicates whether the current travels belongs to a package
that needs to be filtered for the given release label.
"""
if isinstance(package, list):
for entry in package:
process_package(entry, in_release)
elif isinstance(package, dict):
if release is None:
return
for entry in package.get(release, []):
process_package(entry, in_release=True)
elif isinstance(package, str):
# Filter out the package that doesn't belong to this release,
# if a release label has been specified.
if release is not None and not in_release:
return
packages.append(package)
else:
raise Exception('Unknown package of type: {}'.format(type(package)))
for platforms in filter(lambda x: x.get(platform) is not None, pkgs.values()):
process_package(platforms.get(platform))
return packages
if __name__ == '__main__':
if len(sys.argv) < 2:
print('ERROR: Need at least 1 argument, {} were provided'.format(len(sys.argv) - 1),
file=sys.stderr)
sys.exit(1)
arg_parser = argparse.ArgumentParser(
description='Platform package dependency resolver for building Apache Hadoop')
arg_parser.add_argument('-r', '--release', nargs=1, type=str,
help='The release label to filter the packages for the given platform')
arg_parser.add_argument('platform', nargs=1, type=str,
help='The name of the platform to resolve the dependencies for')
args = arg_parser.parse_args()
if not is_supported_platform(args.platform[0]):
print(
'ERROR: The given platform {} is not supported. '
'Please refer to platforms.json for a list of supported platforms'.format(
args.platform), file=sys.stderr)
sys.exit(1)
packages_to_install = get_packages(args.platform[0],
args.release[0] if args.release is not None else None)
print(' '.join(packages_to_install))