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#!/usr/bin/env python3
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at
import argparse
import os
import taskcluster
queue = taskcluster.Queue(
"rootUrl": os.environ.get("TASKCLUSTER_PROXY_URL", ""),
def check_all_dependencies_are_completed(current_task_id):
print(f"Fetching task definition of {current_task_id}...")
task = queue.task(current_task_id)
dependencies_task_ids = task["dependencies"]
print(f"Fetching status of {len(dependencies_task_ids)} dependencies...")
# TODO Make this dict-comprehension async once we go Python 3
state_per_task_ids = {
task_id: queue.status(task_id)["status"]["state"]
for task_id in dependencies_task_ids
print("Statuses fetched.")
non_completed_tasks = {
task_id: state
for task_id, state in state_per_task_ids.items()
if state != "completed"
if non_completed_tasks:
raise ValueError(f"Some tasks are not completed: {non_completed_tasks}")
def main():
parser = argparse.ArgumentParser(
description='Errors out if one of the DEPENDENCY_TASK_ID does not have the Taskcluster status "completed"'
help="The task ID of the current running task",
result = parser.parse_args()
print("All dependencies are completed. Reporting a green task!")
if __name__ == "__main__":