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75 lines
2.4 KiB
75 lines
2.4 KiB
2 years ago
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import contextlib
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import os
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import platform
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from pathlib import Path
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import yaml
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class WorkingDirectory(contextlib.ContextDecorator):
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# Usage: @WorkingDirectory(dir) decorator or 'with WorkingDirectory(dir):' context manager
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def __init__(self, new_dir):
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self.dir = new_dir # new dir
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self.cwd = Path.cwd().resolve() # current dir
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def __enter__(self):
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os.chdir(self.dir)
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def __exit__(self, exc_type, exc_val, exc_tb):
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os.chdir(self.cwd)
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def is_writeable(dir, test=False):
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# Return True if directory has write permissions, test opening a file with write permissions if test=True
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if not test:
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return os.access(dir, os.W_OK) # possible issues on Windows
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file = Path(dir) / 'tmp.txt'
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try:
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with open(file, 'w'): # open file with write permissions
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pass
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file.unlink() # remove file
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return True
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except OSError:
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return False
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def user_config_dir(dir='Ultralytics', env_var='YOLOV5_CONFIG_DIR'):
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# Return path of user configuration directory. Prefer environment variable if exists. Make dir if required.
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env = os.getenv(env_var)
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if env:
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path = Path(env) # use environment variable
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else:
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cfg = {'Windows': 'AppData/Roaming', 'Linux': '.config', 'Darwin': 'Library/Application Support'} # 3 OS dirs
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path = Path.home() / cfg.get(platform.system(), '') # OS-specific config dir
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path = (path if is_writeable(path) else Path('/tmp')) / dir # GCP and AWS lambda fix, only /tmp is writeable
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path.mkdir(exist_ok=True) # make if required
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return path
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def increment_path(path, exist_ok=False, sep='', mkdir=False):
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"""
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Increment file or directory path, i.e. runs/exp --> runs/exp{sep}2, runs/exp{sep}3, ... etc.
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# TODO: docs
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"""
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path = Path(path) # os-agnostic
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if path.exists() and not exist_ok:
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path, suffix = (path.with_suffix(''), path.suffix) if path.is_file() else (path, '')
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# Method 1
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for n in range(2, 9999):
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p = f'{path}{sep}{n}{suffix}' # increment path
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if not os.path.exists(p): #
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break
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path = Path(p)
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if mkdir:
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path.mkdir(parents=True, exist_ok=True) # make directory
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return path
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def save_yaml(file='data.yaml', data=None):
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# Single-line safe yaml saving
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with open(file, 'w') as f:
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yaml.safe_dump({k: str(v) if isinstance(v, Path) else v for k, v in data.items()}, f, sort_keys=False)
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