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96 lines
2.8 KiB
96 lines
2.8 KiB
import os
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import shutil
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import tempfile
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import contextlib
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from typing import Optional
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def rm_not_exists_ok(path):
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try:
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os.remove(path)
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except OSError:
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if os.path.exists(path):
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raise
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def rm_tree_or_link(path):
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if os.path.islink(path):
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os.unlink(path)
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elif os.path.isdir(path):
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shutil.rmtree(path)
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def get_tmpdir_on_same_filesystem(path):
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normpath = os.path.normpath(path)
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parts = normpath.split("/")
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if len(parts) > 1 and parts[1] == "scratch":
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return "/scratch/tmp"
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elif len(parts) > 2 and parts[2] == "runner":
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return f"/{parts[1]}/runner/tmp"
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return "/tmp"
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class NamedTemporaryDir():
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def __init__(self, temp_dir=None):
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self._path = tempfile.mkdtemp(dir=temp_dir)
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@property
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def name(self):
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return self._path
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def close(self):
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shutil.rmtree(self._path)
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self.close()
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class CallbackReader:
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"""Wraps a file, but overrides the read method to also
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call a callback function with the number of bytes read so far."""
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def __init__(self, f, callback, *args):
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self.f = f
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self.callback = callback
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self.cb_args = args
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self.total_read = 0
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def __getattr__(self, attr):
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return getattr(self.f, attr)
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def read(self, *args, **kwargs):
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chunk = self.f.read(*args, **kwargs)
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self.total_read += len(chunk)
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self.callback(*self.cb_args, self.total_read)
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return chunk
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def _get_fileobject_func(writer, temp_dir):
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def _get_fileobject():
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return writer.get_fileobject(dir=temp_dir)
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return _get_fileobject
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@contextlib.contextmanager
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def atomic_write_on_fs_tmp(path: str, mode: str = 'w', buffering: int = -1, encoding: Optional[str] = None, newline: Optional[str] = None):
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"""Write to a file atomically using a temporary file in a temporary directory on the same filesystem as path."""
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temp_dir = get_tmpdir_on_same_filesystem(path)
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with tempfile.NamedTemporaryFile(mode=mode, buffering=buffering, encoding=encoding, newline=newline, dir=temp_dir, delete=False) as tmp_file:
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yield tmp_file
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tmp_file_name = tmp_file.name
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os.replace(tmp_file_name, path)
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@contextlib.contextmanager
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def atomic_write_in_dir(path: str, mode: str = 'w', buffering: int = -1, encoding: Optional[str] = None, newline: Optional[str] = None,
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overwrite: bool = False):
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"""Write to a file atomically using a temporary file in the same directory as the destination file."""
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dir_name = os.path.dirname(path)
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if not overwrite and os.path.exists(path):
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raise FileExistsError(f"File '{path}' already exists. To overwrite it, set 'overwrite' to True.")
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with tempfile.NamedTemporaryFile(mode=mode, buffering=buffering, encoding=encoding, newline=newline, dir=dir_name, delete=False) as tmp_file:
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yield tmp_file
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tmp_file_name = tmp_file.name
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os.replace(tmp_file_name, path)
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