jarupdater-metadata-template/release.py

#!/usr/bin/python3

import json, os, time, tempfile, shutil
import argparse, urllib.request
from hashlib import sha256

META_FILENAME = 'meta-v1.json'
BASE_DIR = 'data'
WAITING_DIR = 'pending'
TEMP_DIR = tempfile.TemporaryDirectory()

# file scanner functions

def match_name(filename: str, extension: str=None, exact_name: str=None):
  if exact_name is not None:
    return filename == exact_name
  elif extension is not None:
    return filename.lower().endswith(extension.lower())
  return True

def scan_for_file(ask: bool=False, extension: str=None, exact_name: str=None) -> tuple[str]:
  for file in os.scandir():
    if file.is_dir(): continue
    if not match_name(file.name, extension, exact_name): continue

    if ask:
      if not confirm(f"Found {file.name} in the current directory, do you want to proceed with it?"):
        return (None, None)

    return (file.path, file.name)
  return (None, None)

def wait_for_file(waiting_dir: str, extension: str=None) -> tuple[str]:
  print(f"Please put a {extension} file in {waiting_dir}")
  while True:
    files = [i for i in os.scandir(waiting_dir)]

    if len(files) == 0:
      time.sleep(0.5)
      continue

    file = files[0]
    filepath = file.path
    filename = file.name

    if match_name(filename, extension):
      break
    else:
      os.remove(filepath)
      print(f"Not a {extension} file: {filename}")

  return (filepath, filename)

def just_find_file(name: str) -> tuple[str]:
  spl = name.split('.')
  extension = spl[-1]
  exact_name = name[:-len(extension)-1] if len(spl) > 1 else None

  filepath, filename = scan_for_file(True, extension, exact_name)
  if filepath is None:
    try:
      os.makedirs(WAITING_DIR, exist_ok=True)
      filepath, filename = wait_for_file(WAITING_DIR, extension)
    except KeyboardInterrupt:
      os.rmdir(WAITING_DIR)
      return
    
  if filepath is not None:
    tpath = os.path.join(TEMP_DIR.name, filename)
    shutil.move(filepath, tpath)
    filepath = tpath
    
  return (filepath, filename)

# directory util fnctions

def make_path(channel: str, version: str=None, filename: str=None) -> str:
  args = [channel, version, filename]
  args = [i for i in args if i is not None]
  return os.path.join(BASE_DIR, *args)

# metadata functions

def load_latest_data(channel: str) -> dict:
  path = make_path(channel, 'latest', META_FILENAME)
  if os.path.isfile(path):
    return json.loads(open(path).read())
  return {'id': 0}

def write_metadata(channel: str, metadata: dict):
  version = metadata['label']
  metadata = json.dumps(metadata)
  for filepath in [make_path(channel, version, META_FILENAME), make_path(channel, 'latest', META_FILENAME)]:
    with open(filepath, 'w') as file:
      file.write(metadata)

def commit_and_push(channel: str, version: str):
  os.system(f'git add data/{channel}/latest')
  os.system(f'git add data/{channel}/{version}')
  os.system(f'git commit -m "[releaser] Release {version} on {channel}"')
  os.system('git push')

# other

def confirm(prompt: str) -> bool:
  confirmed = input(prompt + ' (Y/N) ')
  return confirmed.lower() == 'y'

def hash_file(filepath: str) -> str:
  with open(filepath, 'rb') as file:
    return sha256(file.read()).hexdigest()

def download_and_hash(url: str) -> str:
    sha256_hash = sha256()
    
    try:
        print(f"Downloading and hashing {url}...")
        with urllib.request.urlopen(url) as response:
            # Read and hash in chunks to handle large files efficiently
            while True:
                chunk = response.read(4096)  # 4KB chunks
                if not chunk:
                    break
                sha256_hash.update(chunk)
                
        return sha256_hash.hexdigest()
    
    except Exception as e:
        raise Exception(f"Download or hashing failed: {str(e)}")

# main

def main(config: dict, version: str, channel: str, local: bool):
    file_url = None
    file_hash = None

    changelog = confirm('Do you want to include a changelog?')
    if changelog:
        chlog_filepath, chlog_filename = just_find_file('changelog.txt')

    latest_data = load_latest_data(channel)
    version_dir = make_path(channel, version)

    os.makedirs(make_path(channel, 'latest'), exist_ok=True)
    os.mkdir(version_dir)
    
    if changelog: shutil.move(chlog_filepath, os.path.join(version_dir, 'changelog.txt'))

    if local:
        jar_filepath, jar_filename = just_find_file('jar')

        file_hash = hash_file(jar_filepath)
        file_url = f'{config["baseUrl"]}/{BASE_DIR}/{channel}/{version}/{jar_filename}'

        shutil.move(jar_filepath, os.path.join(version_dir, jar_filename))
    else:
        groupId, artifactId = config["maven"]["package"].split(':')
        file_url = config["maven"]["repo"] + f"/{groupId.replace('.', '/')}/{artifactId}/{version}/{artifactId}-{version}.jar"
        file_hash = download_and_hash(file_url)

    metadata = {
        'label': version,
        'id': latest_data['id'] + 1,
        'timestamp': int(time.time()),
        'file': file_url,
        'sha256': file_hash
    }

    write_metadata(channel, metadata)

    try:
        os.rmdir(WAITING_DIR)
    except FileNotFoundError:
        pass

    if confirm("Commit and push?"):
        commit_and_push(channel, version)

    print("Done")

if __name__ == "__main__":
    config = json.loads(open('config.json', 'r').read())
    channels = [c.strip() for c in open(os.path.join('data', 'channels.txt'))]
    
    parser = argparse.ArgumentParser(
        description='Release',
        formatter_class=argparse.ArgumentDefaultsHelpFormatter
    )

    parser.add_argument('version', 
                       help='The version to release')
    
    parser.add_argument('-c', '--channel',
                       default=config["defaultChannel"],
                       choices=channels,
                       help='Release channel')
    
    parser.add_argument('-l', '--local',
                       action='store_true',
                       help='From local file instead of repo')

    args = parser.parse_args()
    version = args.version
    channel = args.channel
    local = args.local

    if version == "latest":
        print("Version can't be \"latest\"")
        exit()

    def check_version_exists(version: str) -> str | None:
        """
        Check if version exists in any channel.
        If yes, returns that channel, otherwise None
        """
        for channel in list_channels():
            if os.path.isdir(make_path(channel, version)):
                return channel

    existing = [c for c in channels if os.path.isdir(make_path(c, version))]

    if channel in existing:
        print(f"Version {version} already exists in channel {channel}.")
        exit()

    if len(existing) > 0:
        if not confirm(f"Version {version} already exists in \"{', '.join(existing)}\". Do you still want to proceed?"):
            exit()

    main(config, version, channel, local)