import-url: support directories

dvc/remote/base.py

@@ -547,11 +547,51 @@ def download(
         if to_info.scheme != "local":
             raise NotImplementedError
 
-        logger.debug("Downloading '{}' to '{}'".format(from_info, to_info))
+        if self.isdir(from_info):
+            return self._download_dir(
+                from_info, to_info, name, no_progress_bar, file_mode, dir_mode
+            )
+        return self._download_file(
+            from_info, to_info, name, no_progress_bar, file_mode, dir_mode
+        )
 
-        name = name or to_info.name
+    def _download_dir(
+        self, from_info, to_info, name, no_progress_bar, file_mode, dir_mode
+    ):
+        file_to_infos = (
+            to_info / file_to_info.relative_to(from_info)
+            for file_to_info in self.walk_files(from_info)
+        )
 
+        with ThreadPoolExecutor(max_workers=self.JOBS) as executor:
+            file_from_info = list(self.walk_files(from_info))
+            download_files = partial(
+                self._download_file,
+                name=name,
+                no_progress_bar=True,
+                file_mode=file_mode,
+                dir_mode=dir_mode,
+            )
+            futures = executor.map(
+                download_files, file_from_info, file_to_infos
+            )
+            with Tqdm(
+                futures,
+                total=len(file_from_info),
+                desc="Downloading directory",
+                unit="Files",
+                disable=no_progress_bar,
+            ) as futures:
+                return sum(futures)
+
+    def _download_file(
+        self, from_info, to_info, name, no_progress_bar, file_mode, dir_mode
+    ):
         makedirs(to_info.parent, exist_ok=True, mode=dir_mode)
+
+        logger.debug("Downloading '{}' to '{}'".format(from_info, to_info))
+        name = name or to_info.name
+
         tmp_file = tmp_fname(to_info)
 
         try:

tests/unit/remote/test_remote_dir.py

@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 import pytest
+import os
 
 from dvc.remote.s3 import RemoteS3
 
@@ -132,3 +133,20 @@ def test_isfile(remote):
 
     for expected, path in test_cases:
         assert remote.isfile(remote.path_info / path) == expected
+
+
+@pytest.mark.parametrize("remote", remotes, indirect=True)
+def test_download_dir(remote, tmpdir):
+    path = os.fspath(tmpdir / "data")
+    to_info = os.PathInfo(path)
+    remote.download(remote.path_info / "data", to_info)
+    assert os.path.isdir(path)
+    data_dir = tmpdir / "data"
+    assert len(list(walk_files(path, None))) == 7
+    assert (data_dir / "alice").read_text(encoding="utf-8") == "alice"
+    assert (data_dir / "alpha").read_text(encoding="utf-8") == "alpha"
+    assert (data_dir / "subdir-file.txt").read_text(encoding="utf-8") == "subdir"
+    assert (data_dir / "subdir" / "1").read_text(encoding="utf-8") == "1"
+    assert (data_dir / "subdir" / "2").read_text(encoding="utf-8") == "2"
+    assert (data_dir / "subdir" / "3").read_text(encoding="utf-8") == "3"
+    assert (data_dir / "subdir" / "empty_file").read_text(encoding="utf-8") == ""