find-blocking-packages.py

#!/usr/bin/python3

import sys
import yaml

# Use LibYAML is available, otherwise this is going to be super slow
try:
    from yaml import CSafeLoader as SafeLoader
except ImportError:
    print("Expect slowness!")
    from yaml import SafeLoader


def parse_excuses(excuses_file):
    regressed_packages = set()
    with open(excuses_file, "r", encoding="UTF-8") as f:
        excuses = yaml.load(f, Loader=SafeLoader)["sources"]
    for excuse in excuses:
        # We only want packages blocked *only* by tests
        if excuse["reason"] != ["autopkgtest"]:
            continue
        # Among blocked-by-tests packages, look regressions in testing,
        # to exclude packages with tests in RUNNING state.
        verdict = excuse["policy_info"]["autopkgtest"]["verdict"]
        if verdict != "REJECTED_PERMANENTLY":
            continue
        # Ok, we found a package blocked only by tests.
        # Now let's find the blocking packages
        autopkgtest = excuse["policy_info"]["autopkgtest"]
        for entry in autopkgtest:
            if "/" not in entry:
                # It's the "verdict", not a package/version entry
                continue
            for arch in excuse["policy_info"]["autopkgtest"][entry]:
                result = excuse["policy_info"]["autopkgtest"][entry][arch][0]
                if result == "REGRESSION":
                    bad = f"{entry}/{arch}"
                    regressed_packages.add(bad)

    print(*regressed_packages, sep="\n")


if __name__ == "__main__":
    if len(sys.argv) != 2:
        print(f"Usage: {sys.argv[0]} /path/to/update_excuses.yaml")
        print(
            f"Or: {sys.argv[0]} <(curl -sS https://ubuntu-archive-team.ubuntu.com/proposed-migration/noble/update_excuses.yaml.xz | xzcat)"
        )
        sys.exit(1)
    parse_excuses(sys.argv[1])