#!/usr/bin/env python3

import os


def get_build_url_from_environment() -> str:
    server = os.environ["GITHUB_SERVER_URL"]
    repo = os.environ["GITHUB_REPOSITORY"]
    run_id = os.environ["GITHUB_RUN_ID"]
    return f"{server}/{repo}/actions/runs/{run_id}"


if __name__ == "__main__":
    branch = os.environ.get("GITHUB_REF", "unknown branch").split("/")[-1]
    topic = f"{branch} failing"
    build_url = get_build_url_from_environment()
    github_actor = os.environ.get("GITHUB_ACTOR", "unknown user")
    content = f"[Build]({build_url}) triggered by {github_actor} on branch `{branch}` has failed."

    # Output in the key-value pair format GitHub Actions outputs are expected
    # to be in.
    print(f"topic={topic}\ncontent={content}")