release-info.py

#!/usr/bin/python3

import sys
import time
import os


RELEASE_MARKDOWN_PATH = "release-info.md"
OUTPUT_TARGET = None


def create_output(name, content):
    print(f"{name}={content}", file=OUTPUT_TARGET)


def main():
    global OUTPUT_TARGET
    if "GITHUB_ACTIONS" not in os.environ:
        print("GitHub Actions environment expected but not found, abort.", file=sys.stderr)
        sys.exit(1)
    OUTPUT_TARGET = open(os.environ["GITHUB_OUTPUT"], "a")

    # Credits: https://stackoverflow.com/a/1398742/5958455
    # Depends on os.environ["TZ"]
    os.environ["TZ"] = "Etc/UTC"
    time.tzset()
    now = time.localtime(time.time())

    create_output("tag_name", "release-{}".format(time.strftime("%Y%m%d", now)))
    create_output("release_name", "{} (Auto)".format(time.strftime("%Y-%m-%d", now)))
    create_output("body_path", RELEASE_MARKDOWN_PATH)

    # Produce the markdown
    with open(RELEASE_MARKDOWN_PATH, "w") as f:
        body = "This is an automatic release created from [GitHub Actions run {}](https://github.com/{}/actions/runs/{}) on {}.".format(
            os.environ["GITHUB_RUN_NUMBER"],
            os.environ["GITHUB_REPOSITORY"],
            os.environ["GITHUB_RUN_ID"],
            time.strftime("%B %-d, %Y", now),
        )
        print(body, file=f)


if __name__ == '__main__':
    main()