Add "sync" option for upload & download

dandi/cli/cmd_download.py

@@ -73,6 +73,9 @@ def get_metavar(self, param):
     default="all",
     show_default=True,
 )
+@click.option(
+    "--sync", is_flag=True, help="Delete local assets that do not exist on the server"
+)
 @instance_option()
 # Might be a cool feature, not unlike verifying a checksum, we verify that
 # downloaded file passes the validator, and if not -- alert
@@ -91,7 +94,7 @@ def get_metavar(self, param):
 @click.argument("url", nargs=-1)
 @map_to_click_exceptions
 def download(
-    url, output_dir, existing, jobs, format, download_types, dandi_instance=None
+    url, output_dir, existing, jobs, format, download_types, sync, dandi_instance=None
 ):
     """Download a file or entire folder from DANDI"""
     # We need to import the download module rather than the download function
@@ -133,5 +136,6 @@ def download(
         jobs=jobs,
         get_metadata="dandiset.yaml" in download_types,
         get_assets="assets" in download_types,
+        sync=sync,
         # develop_debug=develop_debug
     )

dandi/cli/cmd_upload.py

@@ -50,6 +50,9 @@ def get_metavar(self, param):
     type=IntColonInt(),
     help="Number of files to upload in parallel and, optionally, number of upload threads per file",
 )
+@click.option(
+    "--sync", is_flag=True, help="Delete assets on the server that do not exist locally"
+)
 @click.option(
     "--validation",
     help="Data must pass validation before the upload.  Use of this option is highly discouraged.",
@@ -80,6 +83,7 @@ def get_metavar(self, param):
 def upload(
     paths,
     jobs,
+    sync,
     existing="refresh",
     validation="require",
     dandiset_path=None,
@@ -121,4 +125,5 @@ def upload(
         devel_debug=devel_debug,
         jobs=jobs,
         jobs_per_file=jobs_per_file,
+        sync=sync,
     )

dandi/cli/tests/test_download.py

@@ -21,6 +21,7 @@ def test_download_defaults(mocker):
         jobs=6,
         get_metadata=True,
         get_assets=True,
+        sync=False,
     )
 
 
@@ -36,6 +37,7 @@ def test_download_all_types(mocker):
         jobs=6,
         get_metadata=True,
         get_assets=True,
+        sync=False,
     )
 
 
@@ -51,6 +53,7 @@ def test_download_metadata_only(mocker):
         jobs=6,
         get_metadata=True,
         get_assets=False,
+        sync=False,
     )
 
 
@@ -66,6 +69,7 @@ def test_download_assets_only(mocker):
         jobs=6,
         get_metadata=False,
         get_assets=True,
+        sync=False,
     )
 
 
@@ -96,6 +100,7 @@ def test_download_gui_instance_in_dandiset(mocker):
         jobs=6,
         get_metadata=True,
         get_assets=True,
+        sync=False,
     )
 
 
@@ -117,6 +122,7 @@ def test_download_api_instance_in_dandiset(mocker):
         jobs=6,
         get_metadata=True,
         get_assets=True,
+        sync=False,
     )
 
 
@@ -142,6 +148,7 @@ def test_download_url_instance_match(mocker):
         jobs=6,
         get_metadata=True,
         get_assets=True,
+        sync=False,
     )
 
 

dandi/download.py

@@ -16,7 +16,15 @@
 from .dandiset import Dandiset
 from . import get_logger
 from .support.pyout import naturalsize
-from .utils import ensure_datetime, flattened, is_same_time
+from .utils import (
+    abbrev_prompt,
+    ensure_datetime,
+    find_files,
+    flattened,
+    is_same_time,
+    on_windows,
+    pluralize,
+)
 
 lgr = get_logger()
 
@@ -30,12 +38,31 @@ def download(
     jobs=1,
     get_metadata=True,
     get_assets=True,
+    sync=False,
 ):
     # TODO: unduplicate with upload. For now stole from that one
     # We will again use pyout to provide a neat table summarizing our progress
     # with upload etc
     from .support import pyout as pyouts
 
+    urls = flattened([urls])
+    if len(urls) > 1:
+        raise NotImplementedError("multiple URLs not supported")
+    if not urls:
+        # if no paths provided etc, we will download dandiset path
+        # we are at, BUT since we are not git -- we do not even know
+        # on which instance it exists!  Thus ATM we would do nothing but crash
+        raise NotImplementedError("No URLs were provided.  Cannot download anything")
+
+    parsed_url = parse_dandi_url(urls[0])
+
+    # TODO: if we are ALREADY in a dandiset - we can validate that it is the
+    # same dandiset and use that dandiset path as the one to download under
+    if isinstance(parsed_url, DandisetURL):
+        output_path = op.join(output_dir, parsed_url.dandiset_id)
+    else:
+        output_path = output_dir
+
     # dandi.cli.formatters are used in cmd_ls to provide switchable
     pyout_style = pyouts.get_style(hide_if_missing=False)
 
@@ -56,8 +83,8 @@ def download(
         kw["yield_generator_for_fields"] = rec_fields[1:]  # all but path
 
     gen_ = download_generator(
-        urls,
-        output_dir,
+        parsed_url,
+        output_path,
         existing=existing,
         get_metadata=get_metadata,
         get_assets=get_assets,
@@ -81,10 +108,52 @@ def download(
     else:
         raise ValueError(format)
 
+    if sync and not isinstance(parsed_url, SingleAssetURL):
+        client = parsed_url.get_client()
+        with client.session():
+            asset_paths = {asset["path"] for asset in parsed_url.get_assets(client)}
+        if isinstance(parsed_url, DandisetURL):
+            prefix = os.curdir
+            download_dir = output_path
+        elif isinstance(parsed_url, MultiAssetURL):
+            folder_path = op.normpath(parsed_url.path)
+            prefix = folder_path
+            download_dir = op.join(output_path, op.basename(folder_path))
+        else:
+            raise NotImplementedError(
+                f"Unexpected URL type {type(parsed_url).__name__}"
+            )
+        to_delete = []
+        for p in find_files(".*", download_dir, exclude_datalad=True):
+            if p == op.join(output_path, dandiset_metadata_file):
+                continue
+            a_path = op.normpath(op.join(prefix, op.relpath(p, download_dir)))
+            if on_windows:
+                a_path = a_path.replace("\\", "/")
+            if a_path not in asset_paths:
+                to_delete.append(p)
+        if to_delete:
+            while True:
+                opt = abbrev_prompt(
+                    f"Delete {pluralize(len(to_delete), 'local asset')}?",
+                    "yes",
+                    "no",
+                    "list",
+                )
+                if opt == "list":
+                    for p in to_delete:
+                        print(p)
+                elif opt == "yes":
+                    for p in to_delete:
+                        os.unlink(p)
+                    break
+                else:
+                    break
+
 
 def download_generator(
-    urls,
-    output_dir,
+    parsed_url,
+    output_path,
     *,
     assets_it=None,
     yield_generator_for_fields=None,
@@ -107,38 +176,15 @@ def download_generator(
       summary statistics while already downloading.  TODO: reimplement properly!
 
     """
-    urls = flattened([urls])
-    if len(urls) > 1:
-        raise NotImplementedError("multiple URLs not supported")
-    if not urls:
-        # if no paths provided etc, we will download dandiset path
-        # we are at, BUT since we are not git -- we do not even know
-        # on which instance it exists!  Thus ATM we would do nothing but crash
-        raise NotImplementedError("No URLs were provided.  Cannot download anything")
 
-    parsed_url = parse_dandi_url(urls[0])
     with parsed_url.navigate() as (client, dandiset, assets):
         if assets_it:
             assets_it.gen = assets
             assets = assets_it
 
-        # TODO: if we are ALREADY in a dandiset - we can validate that it is the
-        # same dandiset and use that dandiset path as the one to download under
-        if dandiset:
-            identifier = Dandiset._get_identifier(dandiset)
-            if not identifier:
-                raise ValueError(f"Cannot deduce dandiset identifier from {dandiset}")
-            if isinstance(parsed_url, DandisetURL):
-                output_path = op.join(output_dir, identifier)
-                if get_metadata:
-                    for resp in _populate_dandiset_yaml(
-                        output_path, dandiset, existing
-                    ):
-                        yield dict(path=dandiset_metadata_file, **resp)
-            else:
-                output_path = output_dir
-        else:
-            output_path = output_dir
+        if isinstance(parsed_url, DandisetURL) and get_metadata:
+            for resp in _populate_dandiset_yaml(output_path, dandiset, existing):
+                yield dict(path=dandiset_metadata_file, **resp)
 
         # TODO: do analysis of assets for early detection of needed renames etc
         # to avoid any need for late treatment of existing and also for

dandi/tests/fixtures.py

@@ -284,11 +284,11 @@ def text_dandiset(local_dandi_api, monkeypatch, tmp_path_factory):
     (dspath / "subdir2" / "banana.txt").write_text("Banana\n")
     (dspath / "subdir2" / "coconut.txt").write_text("Coconut\n")
 
-    def upload_dandiset(**kwargs):
+    def upload_dandiset(paths=None, **kwargs):
         with monkeypatch.context() as m:
             m.setenv("DANDI_API_KEY", local_dandi_api["api_key"])
             upload(
-                paths=[],
+                paths=paths or [],
                 dandiset_path=dspath,
                 dandi_instance=local_dandi_api["instance_id"],
                 devel_debug=True,

dandi/tests/test_download.py

@@ -180,3 +180,66 @@ def test_download_asset_id(local_dandi_api, text_dandiset, tmp_path):
         tmp_path / "coconut.txt"
     ]
     assert (tmp_path / "coconut.txt").read_text() == "Coconut\n"
+
+
+@pytest.mark.parametrize("confirm", [True, False])
+def test_download_sync(confirm, local_dandi_api, mocker, text_dandiset, tmp_path):
+    text_dandiset["client"].delete_asset_bypath(
+        text_dandiset["dandiset_id"], "draft", "file.txt"
+    )
+    dspath = tmp_path / text_dandiset["dandiset_id"]
+    os.rename(text_dandiset["dspath"], dspath)
+    confirm_mock = mocker.patch(
+        "dandi.download.abbrev_prompt", return_value="yes" if confirm else "no"
+    )
+    download(
+        f"dandi://{local_dandi_api['instance_id']}/{text_dandiset['dandiset_id']}",
+        tmp_path,
+        existing="overwrite",
+        sync=True,
+    )
+    confirm_mock.assert_called_with("Delete 1 local asset?", "yes", "no", "list")
+    if confirm:
+        assert not (dspath / "file.txt").exists()
+    else:
+        assert (dspath / "file.txt").exists()
+
+
+def test_download_sync_folder(local_dandi_api, mocker, text_dandiset):
+    text_dandiset["client"].delete_asset_bypath(
+        text_dandiset["dandiset_id"], "draft", "file.txt"
+    )
+    text_dandiset["client"].delete_asset_bypath(
+        text_dandiset["dandiset_id"], "draft", "subdir2/banana.txt"
+    )
+    confirm_mock = mocker.patch("dandi.download.abbrev_prompt", return_value="yes")
+    download(
+        f"dandi://{local_dandi_api['instance_id']}/{text_dandiset['dandiset_id']}/subdir2/",
+        text_dandiset["dspath"],
+        existing="overwrite",
+        sync=True,
+    )
+    confirm_mock.assert_called_with("Delete 1 local asset?", "yes", "no", "list")
+    assert (text_dandiset["dspath"] / "file.txt").exists()
+    assert not (text_dandiset["dspath"] / "subdir2" / "banana.txt").exists()
+
+
+def test_download_sync_list(capsys, local_dandi_api, mocker, text_dandiset, tmp_path):
+    text_dandiset["client"].delete_asset_bypath(
+        text_dandiset["dandiset_id"], "draft", "file.txt"
+    )
+    dspath = tmp_path / text_dandiset["dandiset_id"]
+    os.rename(text_dandiset["dspath"], dspath)
+    input_mock = mocker.patch("dandi.utils.input", side_effect=["list", "yes"])
+    download(
+        f"dandi://{local_dandi_api['instance_id']}/{text_dandiset['dandiset_id']}",
+        tmp_path,
+        existing="overwrite",
+        sync=True,
+    )
+    assert not (dspath / "file.txt").exists()
+    assert input_mock.call_args_list == [
+        mocker.call("Delete 1 local asset? ([y]es/[n]o/[l]ist): "),
+        mocker.call("Delete 1 local asset? ([y]es/[n]o/[l]ist): "),
+    ]
+    assert capsys.readouterr().out.splitlines()[-1] == str(dspath / "file.txt")

dandi/tests/test_upload.py

@@ -151,3 +151,38 @@ def test_upload_download_small_file(contents, local_dandi_api, monkeypatch, tmp_
         download_dir / dandiset_id / "file.txt",
     ]
     assert files[1].read_bytes() == contents
+
+
+@pytest.mark.parametrize("confirm", [True, False])
+def test_upload_sync(confirm, mocker, text_dandiset):
+    (text_dandiset["dspath"] / "file.txt").unlink()
+    confirm_mock = mocker.patch("click.confirm", return_value=confirm)
+    text_dandiset["reupload"](sync=True)
+    confirm_mock.assert_called_with("Delete 1 asset on server?")
+    asset = text_dandiset["client"].get_asset_bypath(
+        text_dandiset["dandiset_id"], "draft", "file.txt"
+    )
+    if confirm:
+        assert asset is None
+    else:
+        assert asset is not None
+
+
+def test_upload_sync_folder(mocker, text_dandiset):
+    (text_dandiset["dspath"] / "file.txt").unlink()
+    (text_dandiset["dspath"] / "subdir2" / "banana.txt").unlink()
+    confirm_mock = mocker.patch("click.confirm", return_value=True)
+    text_dandiset["reupload"](paths=[text_dandiset["dspath"] / "subdir2"], sync=True)
+    confirm_mock.assert_called_with("Delete 1 asset on server?")
+    assert (
+        text_dandiset["client"].get_asset_bypath(
+            text_dandiset["dandiset_id"], "draft", "file.txt"
+        )
+        is not None
+    )
+    assert (
+        text_dandiset["client"].get_asset_bypath(
+            text_dandiset["dandiset_id"], "draft", "subdir2/banana.txt"
+        )
+        is None
+    )