Change md5 to hash and hash_algorithm, fix incompatibility

.github/workflows/downstream.yml

@@ -107,6 +107,23 @@ jobs:
           test_command: pip install pytest-jupyter[server] && pytest -vv -raXxs -W default --durations 10 --color=yes
           package_name: jupyter_server_terminals
 
+  jupytext:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Base Setup
+        uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
+
+      - name: Test jupytext
+        uses: jupyterlab/maintainer-tools/.github/actions/downstream-test@v1
+        with:
+          package_name: jupytext
+          test_command: pip install pytest-jupyter[server] gitpython pre-commit && python -m ipykernel install --name jupytext-dev --user && pytest -vv -raXxs -W default --durations 10 --color=yes --ignore=tests/test_doc_files_are_notebooks.py --ignore=tests/test_changelog.py
+
   downstream_check: # This job does nothing and is only used for the branch protection
     if: always()
     needs:
@@ -115,6 +132,7 @@ jobs:
       - jupyterlab_server
       - notebook
       - nbclassic
+      - jupytext
     runs-on: ubuntu-latest
     steps:
       - name: Decide whether the needed jobs succeeded or failed

docs/source/developers/contents.rst

@@ -33,40 +33,48 @@ which we refer to as **models**.
 
 Models may contain the following entries:
 
-+--------------------+-----------+------------------------------+
-| Key                | Type      |Info                          |
-+====================+===========+==============================+
-|**name**            |unicode    |Basename of the entity.       |
-+--------------------+-----------+------------------------------+
-|**path**            |unicode    |Full                          |
-|                    |           |(:ref:`API-style<apipaths>`)  |
-|                    |           |path to the entity.           |
-+--------------------+-----------+------------------------------+
-|**type**            |unicode    |The entity type. One of       |
-|                    |           |``"notebook"``, ``"file"`` or |
-|                    |           |``"directory"``.              |
-+--------------------+-----------+------------------------------+
-|**created**         |datetime   |Creation date of the entity.  |
-+--------------------+-----------+------------------------------+
-|**last_modified**   |datetime   |Last modified date of the     |
-|                    |           |entity.                       |
-+--------------------+-----------+------------------------------+
-|**content**         |variable   |The "content" of the entity.  |
-|                    |           |(:ref:`See                    |
-|                    |           |Below<modelcontent>`)         |
-+--------------------+-----------+------------------------------+
-|**mimetype**        |unicode or |The mimetype of ``content``,  |
-|                    |``None``   |if any.  (:ref:`See           |
-|                    |           |Below<modelcontent>`)         |
-+--------------------+-----------+------------------------------+
-|**format**          |unicode or |The format of ``content``,    |
-|                    |``None``   |if any. (:ref:`See            |
-|                    |           |Below<modelcontent>`)         |
-+--------------------+-----------+------------------------------+
-|**md5**             |unicode or |The md5 of the contents.      |
-|                    |``None``   |                              |
-|                    |           |                              |
-+--------------------+-----------+------------------------------+
++--------------------+------------+-------------------------------+
+|        Key         |    Type    |             Info              |
++====================+============+===============================+
+| **name**           | unicode    | Basename of the entity.       |
++--------------------+------------+-------------------------------+
+| **path**           | unicode    | Full                          |
+|                    |            | (:ref:`API-style<apipaths>`)  |
+|                    |            | path to the entity.           |
++--------------------+------------+-------------------------------+
+| **type**           | unicode    | The entity type. One of       |
+|                    |            | ``"notebook"``, ``"file"`` or |
+|                    |            | ``"directory"``.              |
++--------------------+------------+-------------------------------+
+| **created**        | datetime   | Creation date of the entity.  |
++--------------------+------------+-------------------------------+
+| **last_modified**  | datetime   | Last modified date of the     |
+|                    |            | entity.                       |
++--------------------+------------+-------------------------------+
+| **content**        | variable   | The "content" of the entity.  |
+|                    |            | (:ref:`See                    |
+|                    |            | Below<modelcontent>`)         |
++--------------------+------------+-------------------------------+
+| **mimetype**       | unicode or | The mimetype of ``content``,  |
+|                    | ``None``   | if any.  (:ref:`See           |
+|                    |            | Below<modelcontent>`)         |
++--------------------+------------+-------------------------------+
+| **format**         | unicode or | The format of ``content``,    |
+|                    | ``None``   | if any. (:ref:`See            |
+|                    |            | Below<modelcontent>`)         |
++--------------------+------------+-------------------------------+
+| [optional]         |            |                               |
+| **hash**           | unicode or | The hash of the contents.     |
+|                    | ``None``   | It cannot be null if          |
+|                    |            | ``hash_algorithm`` is         |
+|                    |            | defined.                      |
++--------------------+------------+-------------------------------+
+| [optional]         |            |                               |
+| **hash_algorithm** | unicode or | The algorithm used to compute |
+|                    | ``None``   | hash value.                   |
+|                    |            | It cannot be null             |
+|                    |            | if ``hash`` is defined.       |
++--------------------+------------+-------------------------------+
 
 .. _modelcontent:
 
@@ -80,8 +88,9 @@ model. There are three model types: **notebook**, **file**, and **directory**.
       :class:`nbformat.notebooknode.NotebookNode` representing the .ipynb file
       represented by the model.  See the `NBFormat`_ documentation for a full
       description.
-    - The ``md5`` field a hexdigest string of the md5 value of the notebook
-      file.
+    - The ``hash`` field a hexdigest string of the hash value of the file.
+      If ``ContentManager.get`` not support hash, it should always be ``None``.
+    - ``hash_algorithm`` is the algorithm used to compute the hash value.
 
 - ``file`` models
     - The ``format`` field is either ``"text"`` or ``"base64"``.
@@ -91,14 +100,16 @@ model. There are three model types: **notebook**, **file**, and **directory**.
       file models, ``content`` simply contains the file's bytes after decoding
       as UTF-8.  Non-text (``base64``) files are read as bytes, base64 encoded,
       and then decoded as UTF-8.
-    - The ``md5`` field a hexdigest string of the md5 value of the file.
+    - The ``hash`` field a hexdigest string of the hash value of the file.
+      If ``ContentManager.get`` not support hash, it should always be ``None``.
+    - ``hash_algorithm`` is the algorithm used to compute the hash value.
 
 - ``directory`` models
     - The ``format`` field is always ``"json"``.
     - The ``mimetype`` field is always ``None``.
     - The ``content`` field contains a list of :ref:`content-free<contentfree>`
       models representing the entities in the directory.
-    - The ``md5`` field is always ``None``.
+    - The ``hash`` field is always ``None``.
 
 .. note::
 
@@ -115,7 +126,7 @@ model. There are three model types: **notebook**, **file**, and **directory**.
 
 .. code-block:: python
 
-    # Notebook Model with Content
+    # Notebook Model with Content and Hash
     {
         "content": {
             "metadata": {},
@@ -137,7 +148,8 @@ model. There are three model types: **notebook**, **file**, and **directory**.
         "path": "foo/a.ipynb",
         "type": "notebook",
         "writable": True,
-        "md5": "7e47382b370c05a1b14706a2a8aff91a",
+        "hash": "f5e43a0b1c2e7836ab3b4d6b1c35c19e2558688de15a6a14e137a59e4715d34b",
+        "hash_algorithm": "sha256",
     }
 
     # Notebook Model without Content

jupyter_server/services/api/api.yaml

@@ -106,9 +106,9 @@ paths:
           in: query
           description: "Return content (0 for no content, 1 for return content)"
           type: integer
-        - name: md5
+        - name: hash
           in: query
-          description: "Return md5 hexdigest string of content (0 for no md5, 1 for return md5)"
+          description: "May return hash hexdigest string of content and the hash algorithm (0 for no hash - default, 1 for return hash). It may be ignored by the content manager."
           type: integer
       responses:
         404:
@@ -889,7 +889,7 @@ definitions:
       kernel:
         $ref: "#/definitions/Kernel"
   Contents:
-    description: "A contents object.  The content and format keys may be null if content is not contained. The md5 maybe null if md5 is not contained.  If type is 'file', then the mimetype will be null."
+    description: "A contents object.  The content and format keys may be null if content is not contained. The hash maybe null if hash is not required.  If type is 'file', then the mimetype will be null."
     type: object
     required:
       - type
@@ -901,7 +901,6 @@ definitions:
       - mimetype
       - format
       - content
-      - md5
     properties:
       name:
         type: string
@@ -939,9 +938,12 @@ definitions:
       format:
         type: string
         description: Format of content (one of null, 'text', 'base64', 'json')
-      md5:
+      hash:
         type: string
-        description: "The md5 hexdigest string of content, if requested (otherwise null)."
+        description: "[optional] The hexdigest hash string of content, if requested (otherwise null). It cannot be null if hash_algorithm is defined."
+      hash_algorithm:
+        type: string
+        description: "[optional] The algorithm used to produce the hash, if requested (otherwise null). It cannot be null if hash is defined."
   Checkpoints:
     description: A checkpoint object.
     type: object

jupyter_server/services/contents/filecheckpoints.py

@@ -252,7 +252,7 @@ def get_file_checkpoint(self, checkpoint_id, path):
         if not os.path.isfile(os_checkpoint_path):
             self.no_such_checkpoint(path, checkpoint_id)
 
-        content, format = self._read_file(os_checkpoint_path, format=None)
+        content, format = self._read_file(os_checkpoint_path, format=None)  # type: ignore[misc]
         return {
             "type": "file",
             "content": content,
@@ -318,7 +318,7 @@ async def get_file_checkpoint(self, checkpoint_id, path):
         if not os.path.isfile(os_checkpoint_path):
             self.no_such_checkpoint(path, checkpoint_id)
 
-        content, format = await self._read_file(os_checkpoint_path, format=None)
+        content, format = await self._read_file(os_checkpoint_path, format=None)  # type: ignore[misc]
         return {
             "type": "file",
             "content": content,