How to Use Private Data Source
==============================

.. warning::
   The information below is incomplete and requires extra work. Use it at your own risk!


Interface and Examples
----------------------

EDM supports two types of executions:

1. ``emmi-data <SERVICE_NAME> <COMMAND>`` — specify a service name (each has unique commands).
2. ``emmi-data <COMMAND>`` — run a global command.

Hugging Face
~~~~~~~~~~~~

.. code-block:: bash

    emmi-data huggingface estimate EmmiAI/AB-UPT
    emmi-data huggingface ext EmmiAI/NeuralDEM .th ~/data --type model --manifest-out manifest.json

The ``ext`` command downloads all ``.th`` files from ``EmmiAI/NeuralDEM`` into ``~/data``.
The ``--manifest-out`` option writes a manifest for integrity checks.

AWS
~~~

.. code-block:: bash

    emmi-data aws estimate noaa-goes16 ABI-L1b-RadC/2023/001/00/
    emmi-data aws fetch my-bucket data/prefix/ ./data --extension .parquet --manifest-out s3-manifest.json

The ``fetch`` command downloads only ``.parquet`` files into ``./data``, while creating
a manifest file.

Verification
------------

Verification determines whether files are complete. If ``manifest.json`` exists, corrupted
or missing files can be redownloaded:

.. code-block:: bash

    emmi-data verification check -r ./data -m manifest.json --action redownload

If no manifest exists, create one with:

.. code-block:: bash

    emmi-data verification build -r ./data -m manifest.json

To explore all options, use the ``--help`` flag.

Other Links
-----------
:doc:`Working with the CLI <../working_with_cli>`