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118 lines
3.2 KiB
118 lines
3.2 KiB
import os
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import shutil
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import tempfile
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from atomicwrites import AtomicWriter
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def mkdirs_exists_ok(path):
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try:
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os.makedirs(path)
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except OSError:
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if not os.path.isdir(path):
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raise
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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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# TODO(mgraczyk): HACK, we should actually check for which filesystem.
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normpath = os.path.normpath(path)
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parts = normpath.split("/")
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if len(parts) > 1:
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if parts[1].startswith("raid") or parts[1].startswith("datasets"):
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if len(parts) > 2 and parts[2] == "runner":
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return "/{}/runner/tmp".format(parts[1])
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elif len(parts) > 2 and parts[2] == "aws":
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return "/{}/aws/tmp".format(parts[1])
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else:
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return "/{}/tmp".format(parts[1])
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elif parts[1] == "aws":
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return "/aws/tmp"
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elif parts[1] == "scratch":
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return "/scratch/tmp"
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return "/tmp"
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class AutoMoveTempdir(object):
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def __init__(self, target_path, temp_dir=None):
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self._target_path = target_path
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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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os.rename(self._path, self._target_path)
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def __enter__(self): return self
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def __exit__(self, type, value, traceback):
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if type is None:
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self.close()
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else:
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shutil.rmtree(self._path)
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class NamedTemporaryDir(object):
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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): return self
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def __exit__(self, type, value, traceback):
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self.close()
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def _get_fileobject_func(writer, temp_dir):
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def _get_fileobject():
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file_obj = writer.get_fileobject(dir=temp_dir)
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os.chmod(file_obj.name, 0o644)
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return file_obj
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return _get_fileobject
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def atomic_write_on_fs_tmp(path, **kwargs):
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"""Creates an atomic writer using a temporary file in a temporary directory
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on the same filesystem as path.
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"""
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# TODO(mgraczyk): This use of AtomicWriter relies on implementation details to set the temp
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# directory.
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writer = AtomicWriter(path, **kwargs)
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return writer._open(_get_fileobject_func(writer, get_tmpdir_on_same_filesystem(path)))
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def atomic_write_in_dir(path, **kwargs):
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"""Creates an atomic writer using a temporary file in the same directory
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as the destination file.
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"""
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writer = AtomicWriter(path, **kwargs)
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return writer._open(_get_fileobject_func(writer, os.path.dirname(path)))
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def atomic_write_in_dir_neos(path, contents, mode=None):
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"""
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Atomically writes contents to path using a temporary file in the same directory
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as path. Useful on NEOS, where `os.link` (required by atomic_write_in_dir) is missing.
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"""
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f = tempfile.NamedTemporaryFile(delete=False, prefix=".tmp", dir=os.path.dirname(path))
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f.write(contents)
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f.flush()
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if mode is not None:
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os.fchmod(f.fileno(), mode)
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os.fsync(f.fileno())
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f.close()
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os.rename(f.name, path)
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