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wetty_ynh/.github/workflows/updater.py
2022-08-11 15:53:52 +02:00

126 lines
4.7 KiB
Python
Executable file

#!/usr/bin/env python3
"""
This script is meant to be run by GitHub Actions.
It comes with a Github Action updater.yml to run this script periodically.
Since each app is different, maintainers can adapt its contents to perform
automatic actions when a new upstream release is detected.
You need to enable the action by removing `if ${{ false }}` in updater.yml!
"""
import hashlib
import json
import logging
import os
import re
from subprocess import run, PIPE
import textwrap
from typing import List, Tuple, Any
import requests
from packaging import version
logging.getLogger().setLevel(logging.INFO)
# ========================================================================== #
# Functions customizable by app maintainer
def get_latest_version(repo: str) -> Tuple[version.Version, Any]:
"""May be customized by maintainers for other forges than Github"""
api_url = repo.replace("github.com", "api.github.com/repos")
# May use {api_url}/tags and release["name"] for tag-based upstream
releases = requests.get(f"{api_url}/tags").json()
release_info = next(release for release in releases)
return version.Version(release_info["name"]), release_info
def get_asset_urls_of_release(repo: str, release: Any) -> List[str]:
"""May be customized by maintainers for custom urls"""
return [
# *[asset["browser_download_url"] for asset in release["assets"]],
f"{repo}/archive/refs/tags/{release['name']}.tar.gz"
]
def handle_asset(asset_url: str):
"""This should be customized by the maintainer according to upstream"""
logging.info("Handling asset at %s", asset_url)
if re.match(r".*/v[0-9\.]+.(tar.gz)$", asset_url):
write_src_file("app.src", asset_url, "tar.gz")
else:
logging.info("Asset ignored")
# ========================================================================== #
# Core generic code of the script
def sha256sum_of_url(url: str) -> str:
"""Compute checksum without saving the file"""
checksum = hashlib.sha256()
for chunk in requests.get(url, stream=True).iter_content():
checksum.update(chunk)
return checksum.hexdigest()
def write_src_file(name: str, asset_url: str, extension: str,
extract: bool = True, subdir: bool = True) -> None:
"""Rewrite conf/app.src"""
logging.info("Writing %s...", name)
with open(f"conf/{name}", "w", encoding="utf-8") as conf_file:
conf_file.write(textwrap.dedent(f"""\
SOURCE_URL={asset_url}
SOURCE_SUM={sha256sum_of_url(asset_url)}
SOURCE_SUM_PRG=sha256sum
SOURCE_FORMAT={extension}
SOURCE_IN_SUBDIR={str(subdir).lower()}
SOURCE_EXTRACT={str(extract).lower()}
"""))
def write_github_env(proceed: bool, new_version: str, branch: str):
"""Those values will be used later in the workflow"""
if "GITHUB_ENV" not in os.environ:
logging.warning("GITHUB_ENV is not in the envvars, assuming not in CI")
return
with open(os.environ["GITHUB_ENV"], "w", encoding="utf-8") as github_env:
github_env.write(textwrap.dedent(f"""\
VERSION={new_version}
BRANCH={branch}
PROCEED={str(proceed).lower()}
"""))
def main():
with open("manifest.json", "r", encoding="utf-8") as manifest_file:
manifest = json.load(manifest_file)
repo = manifest["upstream"]["code"]
current_version = version.Version(manifest["version"].split("~")[0])
latest_version, release_info = get_latest_version(repo)
logging.info("Current version: %s", current_version)
logging.info("Latest upstream version: %s", latest_version)
# Proceed only if the retrieved version is greater than the current one
if latest_version <= current_version:
logging.warning("No new version available")
write_github_env(False, "", "")
return
# Proceed only if a PR for this new version does not already exist
branch = f"ci-auto-update-v{latest_version}"
command = ["git", "ls-remote", "--exit-code", "-h", repo, branch]
if run(command, stderr=PIPE, stdout=PIPE, check=False).returncode == 0:
logging.warning("A branch already exists for this update")
write_github_env(False, "", "")
return
assets = get_asset_urls_of_release(repo, release_info)
logging.info("%d available asset(s)", len(assets))
for asset in assets:
handle_asset(asset)
manifest["version"] = f"{latest_version}~ynh1"
with open("manifest.json", "w", encoding="utf-8") as manifest_file:
json.dump(manifest, manifest_file, indent=4, ensure_ascii=False)
manifest_file.write("\n")
write_github_env(True, latest_version, branch)
if __name__ == "__main__":
main()