Fix import issue without remote config in the target

Fix the import issue when target does not have
remote config.

Signed-off-by: Sujith H <sujith.h@gmail.com>

Author: sharidasan

dvc/dependency/repo.py

@@ -11,6 +11,7 @@
 from dvc.exceptions import OutputNotFoundError
 from dvc.exceptions import NoOutputInExternalRepoError
 from dvc.exceptions import PathMissingError
+from dvc.config import NoRemoteError
 from dvc.utils.fs import fs_copy
 from dvc.path_info import PathInfo
 from dvc.scm import SCM
@@ -91,7 +92,14 @@ def fetch(self):
 
             out = repo.find_out_by_relpath(self.def_path)
             with repo.state:
-                repo.cloud.pull(out.get_used_cache())
+                try:
+                    repo.cloud.pull(out.get_used_cache())
+                except NoRemoteError:
+                    # It would not be good idea to raise exception if the
+                    # file is already present in the cache
+                    if not self.repo.cache.local.changed_cache(out.checksum):
+                        return out
+                    raise
 
         return out
 

tests/func/test_import.py

@@ -10,10 +10,12 @@
 from dvc.exceptions import DownloadError
 from dvc.exceptions import PathMissingError
 from dvc.exceptions import NoOutputInExternalRepoError
+from dvc.config import NoRemoteError
 from dvc.stage import Stage
 from dvc.system import System
 from dvc.utils.fs import makedirs
 from dvc.compat import fspath
+import dvc.data_cloud as cloud
 from tests.utils import trees_equal
 
 
@@ -56,6 +58,26 @@ def test_import_git_file(erepo_dir, tmp_dir, dvc, scm, src_is_dvc):
     }
 
 
+def test_import_cached_file(erepo_dir, tmp_dir, dvc, scm, monkeypatch):
+    src = "some_file"
+    dst = "some_file_imported"
+
+    with erepo_dir.chdir():
+        erepo_dir.dvc_gen({src: "hello"}, commit="add a regular file")
+
+    tmp_dir.dvc_gen({dst: "hello"})
+    (tmp_dir / dst).unlink()
+
+    remote_exception = NoRemoteError("dvc import")
+    with patch.object(cloud.DataCloud, "pull", side_effect=remote_exception):
+        tmp_dir.dvc.imp(fspath(erepo_dir), src, dst)
+
+    assert (tmp_dir / dst).is_file()
+    assert filecmp.cmp(
+        fspath(erepo_dir / src), fspath(tmp_dir / dst), shallow=False
+    )
+
+
 @pytest.mark.parametrize("src_is_dvc", [True, False])
 def test_import_git_dir(erepo_dir, tmp_dir, dvc, scm, src_is_dvc):
     if not src_is_dvc: