delete-helm-charts-concurrent.py

import subprocess
from concurrent import futures


def get_releases(namespace: str = "default"):
    ret = subprocess.run(
        ["helm", "list", "-n", namespace, "-q"],
        capture_output=True,
        check=True,
    )
    return ret.stdout.decode().splitlines()


def helm_uninstall(release: str, namespace: str):
    subprocess.run(
        ["helm", "uninstall", release, "--namespace", namespace],
        capture_output=True,
        check=True,
    )


def uninstall_all_releases_in_ns(namespace: str):
    releases = get_releases(namespace)

    with futures.ThreadPoolExecutor(max_workers=5) as executor:
        future_to_release = {
            executor.submit(helm_uninstall, rel, namespace): rel for rel in releases
        }

        for f in futures.as_completed(future_to_release):
            release = future_to_release[f]
            print(f"release {release} uninstalled")


if __name__ == "__main__":
    uninstall_all_releases_in_ns("default")