mirror of https://github.com/apache/kafka.git
94 lines
2.2 KiB
Python
94 lines
2.2 KiB
Python
#
|
|
# 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.
|
|
#
|
|
|
|
"""
|
|
Access and manage name&value preferences, persisted in a local JSON file.
|
|
"""
|
|
|
|
import os
|
|
import json
|
|
|
|
THIS_DIR = os.path.abspath(os.path.dirname(__file__))
|
|
FILE = os.path.join(THIS_DIR, ".release-settings.json")
|
|
|
|
|
|
prefs = {}
|
|
if os.path.exists(FILE):
|
|
with open(FILE, "r") as prefs_fp:
|
|
prefs = json.load(prefs_fp)
|
|
if len(prefs) > 0:
|
|
print(f"Using preferences from: {FILE}")
|
|
|
|
|
|
def save():
|
|
"""
|
|
Save preferences dictionary.
|
|
"""
|
|
print(f"Saving preferences to {FILE}")
|
|
with open(FILE, "w") as prefs_fp:
|
|
json.dump(prefs, prefs_fp)
|
|
|
|
|
|
def set(name, val):
|
|
"""
|
|
Store and persist a preference.
|
|
"""
|
|
prefs[name] = val
|
|
save()
|
|
|
|
|
|
def unset(name):
|
|
"""
|
|
Removes a preference.
|
|
"""
|
|
del prefs[name]
|
|
save()
|
|
|
|
|
|
def get(name, supplier):
|
|
"""
|
|
Retrieve preference if it already exists or delegate
|
|
to the given value supplier and store the result.
|
|
"""
|
|
val = prefs.get(name)
|
|
if not val:
|
|
val = supplier()
|
|
set(name, val)
|
|
else:
|
|
print(f"Assuming: {name} = {val}")
|
|
return val
|
|
|
|
|
|
def once(name, action):
|
|
"""
|
|
Performs the given action if and only if no record of it
|
|
having been executed before exists in the preferences dictionary.
|
|
"""
|
|
def run_action():
|
|
action()
|
|
return True
|
|
get(f"did_{name}", run_action)
|
|
|
|
|
|
def as_json():
|
|
"""
|
|
Export all saved preferences in JSON format.
|
|
"""
|
|
json.dumps(prefs, indent=2)
|
|
|
|
|