emmi_data_management.checkpoint.iohash
======================================

.. py:module:: emmi_data_management.checkpoint.iohash


Attributes
----------

.. autoapisummary::

   emmi_data_management.checkpoint.iohash.DEFAULT_CHUNK


Functions
---------

.. autoapisummary::

   emmi_data_management.checkpoint.iohash.atomic_write_and_hash


Module Contents
---------------

.. py:data:: DEFAULT_CHUNK
   :value: 1048576


.. py:function:: atomic_write_and_hash(destination_path, chunks, *, compute_hash = True, progress = None)

   Write bytes chunks to a temp file in the same directory as destination_path.
   Additionally, updates SHA-256 while writing , then atomically replaces destination_path.

   :param destination_path: Destination path.
   :param chunks: Iterable of bytes to write.
   :param compute_hash: Compute hash of chunks.
   :param progress: Progress object or None for no progress. Expected to have .update(int) and .close() methods.

   :returns: A hex digest.
   :rtype: - str