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272 lines
12 KiB
272 lines
12 KiB
# Ultralytics YOLO 🚀, AGPL-3.0 license
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import contextlib
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import shutil
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import subprocess
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from itertools import repeat
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from multiprocessing.pool import ThreadPool
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from pathlib import Path
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from urllib import parse, request
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from zipfile import BadZipFile, ZipFile, is_zipfile
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import requests
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import torch
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from tqdm import tqdm
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from ultralytics.yolo.utils import LOGGER, checks, clean_url, emojis, is_online, url2file
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GITHUB_ASSET_NAMES = [f'yolov8{k}{suffix}.pt' for k in 'nsmlx' for suffix in ('', '6', '-cls', '-seg', '-pose')] + \
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[f'yolov5{k}u.pt' for k in 'nsmlx'] + \
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[f'yolov3{k}u.pt' for k in ('', '-spp', '-tiny')] + \
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[f'yolo_nas_{k}.pt' for k in 'sml'] + \
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[f'sam_{k}.pt' for k in 'bl'] + \
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[f'FastSAM-{k}.pt' for k in 'sx'] + \
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[f'rtdetr-{k}.pt' for k in 'lx'] + \
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['mobile_sam.pt']
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GITHUB_ASSET_STEMS = [Path(k).stem for k in GITHUB_ASSET_NAMES]
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def is_url(url, check=True):
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"""Check if string is URL and check if URL exists."""
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with contextlib.suppress(Exception):
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url = str(url)
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result = parse.urlparse(url)
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assert all([result.scheme, result.netloc]) # check if is url
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if check:
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with request.urlopen(url) as response:
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return response.getcode() == 200 # check if exists online
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return True
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return False
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def unzip_file(file, path=None, exclude=('.DS_Store', '__MACOSX'), exist_ok=False):
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"""
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Unzips a *.zip file to the specified path, excluding files containing strings in the exclude list.
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If the zipfile does not contain a single top-level directory, the function will create a new
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directory with the same name as the zipfile (without the extension) to extract its contents.
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If a path is not provided, the function will use the parent directory of the zipfile as the default path.
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Args:
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file (str): The path to the zipfile to be extracted.
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path (str, optional): The path to extract the zipfile to. Defaults to None.
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exclude (tuple, optional): A tuple of filename strings to be excluded. Defaults to ('.DS_Store', '__MACOSX').
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exist_ok (bool, optional): Whether to overwrite existing contents if they exist. Defaults to False.
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Raises:
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BadZipFile: If the provided file does not exist or is not a valid zipfile.
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Returns:
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(Path): The path to the directory where the zipfile was extracted.
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"""
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if not (Path(file).exists() and is_zipfile(file)):
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raise BadZipFile(f"File '{file}' does not exist or is a bad zip file.")
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if path is None:
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path = Path(file).parent # default path
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# Unzip the file contents
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with ZipFile(file) as zipObj:
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file_list = [f for f in zipObj.namelist() if all(x not in f for x in exclude)]
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top_level_dirs = {Path(f).parts[0] for f in file_list}
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if len(top_level_dirs) > 1 or not file_list[0].endswith('/'):
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path = Path(path) / Path(file).stem # define new unzip directory
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# Check if destination directory already exists and contains files
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extract_path = Path(path) / list(top_level_dirs)[0]
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if extract_path.exists() and any(extract_path.iterdir()) and not exist_ok:
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# If it exists and is not empty, return the path without unzipping
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LOGGER.info(f'Skipping {file} unzip (already unzipped)')
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return path
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for f in file_list:
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zipObj.extract(f, path=path)
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return path # return unzip dir
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def check_disk_space(url='https://ultralytics.com/assets/coco128.zip', sf=1.5, hard=True):
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"""
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Check if there is sufficient disk space to download and store a file.
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Args:
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url (str, optional): The URL to the file. Defaults to 'https://ultralytics.com/assets/coco128.zip'.
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sf (float, optional): Safety factor, the multiplier for the required free space. Defaults to 2.0.
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hard (bool, optional): Whether to throw an error or not on insufficient disk space. Defaults to True.
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Returns:
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(bool): True if there is sufficient disk space, False otherwise.
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"""
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with contextlib.suppress(Exception):
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gib = 1 << 30 # bytes per GiB
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data = int(requests.head(url).headers['Content-Length']) / gib # file size (GB)
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total, used, free = (x / gib for x in shutil.disk_usage('/')) # bytes
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if data * sf < free:
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return True # sufficient space
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# Insufficient space
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text = (f'WARNING ⚠️ Insufficient free disk space {free:.1f} GB < {data * sf:.3f} GB required, '
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f'Please free {data * sf - free:.1f} GB additional disk space and try again.')
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if hard:
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raise MemoryError(text)
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else:
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LOGGER.warning(text)
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return False
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# Pass if error
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return True
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def safe_download(url,
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file=None,
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dir=None,
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unzip=True,
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delete=False,
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curl=False,
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retry=3,
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min_bytes=1E0,
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progress=True):
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"""
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Downloads files from a URL, with options for retrying, unzipping, and deleting the downloaded file.
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Args:
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url (str): The URL of the file to be downloaded.
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file (str, optional): The filename of the downloaded file.
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If not provided, the file will be saved with the same name as the URL.
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dir (str, optional): The directory to save the downloaded file.
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If not provided, the file will be saved in the current working directory.
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unzip (bool, optional): Whether to unzip the downloaded file. Default: True.
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delete (bool, optional): Whether to delete the downloaded file after unzipping. Default: False.
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curl (bool, optional): Whether to use curl command line tool for downloading. Default: False.
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retry (int, optional): The number of times to retry the download in case of failure. Default: 3.
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min_bytes (float, optional): The minimum number of bytes that the downloaded file should have, to be considered
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a successful download. Default: 1E0.
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progress (bool, optional): Whether to display a progress bar during the download. Default: True.
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"""
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f = dir / url2file(url) if dir else Path(file) # URL converted to filename
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if '://' not in str(url) and Path(url).is_file(): # URL exists ('://' check required in Windows Python<3.10)
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f = Path(url) # filename
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elif not f.is_file(): # URL and file do not exist
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assert dir or file, 'dir or file required for download'
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f = dir / url2file(url) if dir else Path(file)
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desc = f'Downloading {clean_url(url)} to {f}'
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LOGGER.info(f'{desc}...')
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f.parent.mkdir(parents=True, exist_ok=True) # make directory if missing
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check_disk_space(url)
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for i in range(retry + 1):
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try:
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if curl or i > 0: # curl download with retry, continue
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s = 'sS' * (not progress) # silent
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r = subprocess.run(['curl', '-#', f'-{s}L', url, '-o', f, '--retry', '3', '-C', '-']).returncode
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assert r == 0, f'Curl return value {r}'
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else: # urllib download
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method = 'torch'
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if method == 'torch':
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torch.hub.download_url_to_file(url, f, progress=progress)
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else:
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from ultralytics.yolo.utils import TQDM_BAR_FORMAT
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with request.urlopen(url) as response, tqdm(total=int(response.getheader('Content-Length', 0)),
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desc=desc,
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disable=not progress,
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unit='B',
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unit_scale=True,
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unit_divisor=1024,
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bar_format=TQDM_BAR_FORMAT) as pbar:
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with open(f, 'wb') as f_opened:
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for data in response:
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f_opened.write(data)
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pbar.update(len(data))
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if f.exists():
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if f.stat().st_size > min_bytes:
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break # success
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f.unlink() # remove partial downloads
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except Exception as e:
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if i == 0 and not is_online():
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raise ConnectionError(emojis(f'❌ Download failure for {url}. Environment is not online.')) from e
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elif i >= retry:
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raise ConnectionError(emojis(f'❌ Download failure for {url}. Retry limit reached.')) from e
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LOGGER.warning(f'⚠️ Download failure, retrying {i + 1}/{retry} {url}...')
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if unzip and f.exists() and f.suffix in ('', '.zip', '.tar', '.gz'):
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unzip_dir = dir or f.parent # unzip to dir if provided else unzip in place
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LOGGER.info(f'Unzipping {f} to {unzip_dir.absolute()}...')
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if is_zipfile(f):
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unzip_dir = unzip_file(file=f, path=unzip_dir) # unzip
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elif f.suffix == '.tar':
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subprocess.run(['tar', 'xf', f, '--directory', unzip_dir], check=True) # unzip
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elif f.suffix == '.gz':
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subprocess.run(['tar', 'xfz', f, '--directory', unzip_dir], check=True) # unzip
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if delete:
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f.unlink() # remove zip
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return unzip_dir
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def get_github_assets(repo='ultralytics/assets', version='latest'):
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"""Return GitHub repo tag and assets (i.e. ['yolov8n.pt', 'yolov8s.pt', ...])."""
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if version != 'latest':
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version = f'tags/{version}' # i.e. tags/v6.2
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response = requests.get(f'https://api.github.com/repos/{repo}/releases/{version}').json() # github api
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return response['tag_name'], [x['name'] for x in response['assets']] # tag, assets
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def attempt_download_asset(file, repo='ultralytics/assets', release='v0.0.0'):
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"""Attempt file download from GitHub release assets if not found locally. release = 'latest', 'v6.2', etc."""
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from ultralytics.yolo.utils import SETTINGS # scoped for circular import
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# YOLOv3/5u updates
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file = str(file)
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file = checks.check_yolov5u_filename(file)
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file = Path(file.strip().replace("'", ''))
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if file.exists():
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return str(file)
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elif (SETTINGS['weights_dir'] / file).exists():
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return str(SETTINGS['weights_dir'] / file)
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else:
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# URL specified
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name = Path(parse.unquote(str(file))).name # decode '%2F' to '/' etc.
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if str(file).startswith(('http:/', 'https:/')): # download
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url = str(file).replace(':/', '://') # Pathlib turns :// -> :/
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file = url2file(name) # parse authentication https://url.com/file.txt?auth...
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if Path(file).is_file():
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LOGGER.info(f'Found {clean_url(url)} locally at {file}') # file already exists
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else:
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safe_download(url=url, file=file, min_bytes=1E5)
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return file
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# GitHub assets
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assets = GITHUB_ASSET_NAMES
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try:
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tag, assets = get_github_assets(repo, release)
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except Exception:
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try:
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tag, assets = get_github_assets(repo) # latest release
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except Exception:
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try:
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tag = subprocess.check_output(['git', 'tag']).decode().split()[-1]
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except Exception:
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tag = release
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file.parent.mkdir(parents=True, exist_ok=True) # make parent dir (if required)
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if name in assets:
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safe_download(url=f'https://github.com/{repo}/releases/download/{tag}/{name}', file=file, min_bytes=1E5)
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return str(file)
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def download(url, dir=Path.cwd(), unzip=True, delete=False, curl=False, threads=1, retry=3):
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"""Downloads and unzips files concurrently if threads > 1, else sequentially."""
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dir = Path(dir)
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dir.mkdir(parents=True, exist_ok=True) # make directory
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if threads > 1:
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with ThreadPool(threads) as pool:
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pool.map(
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lambda x: safe_download(
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url=x[0], dir=x[1], unzip=unzip, delete=delete, curl=curl, retry=retry, progress=threads <= 1),
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zip(url, repeat(dir)))
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pool.close()
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pool.join()
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else:
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for u in [url] if isinstance(url, (str, Path)) else url:
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safe_download(url=u, dir=dir, unzip=unzip, delete=delete, curl=curl, retry=retry)
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