91 lines
3.0 KiB
Python
91 lines
3.0 KiB
Python
# Copyright 2013 Hewlett-Packard Development Company, L.P.
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed 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.
|
|
|
|
import argparse
|
|
from errno import ENOENT
|
|
import os
|
|
import sys
|
|
|
|
|
|
def get_elements_dir():
|
|
if 'ELEMENTS_DIR' not in os.environ:
|
|
return os.path.abspath(
|
|
os.path.join(os.path.dirname(__file__), '..', 'elements'))
|
|
return os.environ['ELEMENTS_DIR']
|
|
|
|
|
|
def dependencies(element, elements_dir=None):
|
|
""" Return the non-transitive list of dependencies for a single element
|
|
:param user_elements: iterable enumerating elements a user has requested
|
|
:param elements_dir: the elements dir to read from. If not supplied,
|
|
inferred by calling get_elements_dir().
|
|
|
|
:return: a set just containing all elements that the specified element
|
|
depends on.
|
|
"""
|
|
if elements_dir is None:
|
|
elements_dir = get_elements_dir()
|
|
|
|
element_deps_path = os.path.join(elements_dir, element, 'element-deps')
|
|
try:
|
|
with open(element_deps_path) as element_deps:
|
|
return set([line.strip() for line in element_deps])
|
|
except IOError as e:
|
|
if e.errno == 2:
|
|
return set()
|
|
else:
|
|
raise
|
|
|
|
|
|
def expand_dependencies(user_elements, elements_dir=None):
|
|
""" Expand user requested elements using element-deps files.
|
|
|
|
Arguments:
|
|
:param user_elements: iterable enumerating the elements a user requested
|
|
:param elements_dir: the elements dir to read from. Passed directly to
|
|
dependencies()
|
|
|
|
:return: a set containing user_elements and all dependent elements
|
|
including any transitive dependencies.
|
|
"""
|
|
final_elements = set(user_elements)
|
|
check_queue = list(user_elements)
|
|
|
|
while check_queue:
|
|
element = check_queue.pop()
|
|
deps = dependencies(element, elements_dir)
|
|
check_queue.extend(deps - final_elements)
|
|
final_elements.update(deps)
|
|
|
|
return final_elements
|
|
|
|
|
|
def main(argv):
|
|
parser = argparse.ArgumentParser()
|
|
parser.add_argument('elements', nargs='+',
|
|
help='elements to inspect')
|
|
parser.add_argument('--expand-dependencies', '-d', action='store_true',
|
|
default=False,
|
|
help='Print expanded dependencies of all args')
|
|
|
|
args = parser.parse_args(argv[1:])
|
|
|
|
if args.expand_dependencies:
|
|
print(' '.join(expand_dependencies(args.elements)))
|
|
return 0
|
|
|
|
sys.stderr.write("ERROR: please choose an option.\n")
|
|
return -1
|