Copy dir if symlink fails (#7447)

.changes/unreleased/Fixes-20230424-210734.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: Copy dir during `dbt deps` if symlink fails
+time: 2023-04-24T21:07:34.336797+05:30
+custom:
+  Author: anjutiwari
+  Issue: "7428 8223"

core/dbt/deps/local.py

@@ -51,19 +51,15 @@ def install(self, project, renderer):
         src_path = self.resolve_path(project)
         dest_path = self.get_installation_path(project, renderer)
 
-        can_create_symlink = system.supports_symlinks()
-
         if system.path_exists(dest_path):
             if not system.path_is_symlink(dest_path):
                 system.rmdir(dest_path)
             else:
                 system.remove_file(dest_path)
-
-        if can_create_symlink:
+        try:
             fire_event(DepsCreatingLocalSymlink())
             system.make_symlink(src_path, dest_path)
-
-        else:
+        except OSError:
             fire_event(DepsSymlinkNotAvailable())
             shutil.copytree(src_path, dest_path)
 

tests/unit/test_deps.py

@@ -6,7 +6,7 @@
 import dbt.deps
 import dbt.exceptions
 from dbt.deps.git import GitUnpinnedPackage
-from dbt.deps.local import LocalUnpinnedPackage
+from dbt.deps.local import LocalUnpinnedPackage, LocalPinnedPackage
 from dbt.deps.tarball import TarballUnpinnedPackage
 from dbt.deps.registry import RegistryUnpinnedPackage
 from dbt.clients.registry import is_compatible_version
@@ -92,6 +92,21 @@ def test_init(self):
         self.assertEqual(a_pinned.source_type(), "git")
         self.assertIs(a_pinned.warn_unpinned, True)
 
+    @mock.patch("shutil.copytree")
+    @mock.patch("dbt.deps.local.system.make_symlink")
+    @mock.patch("dbt.deps.local.LocalPinnedPackage.get_installation_path")
+    @mock.patch("dbt.deps.local.LocalPinnedPackage.resolve_path")
+    def test_deps_install(
+        self, mock_resolve_path, mock_get_installation_path, mock_symlink, mock_shutil
+    ):
+        mock_resolve_path.return_value = "/tmp/source"
+        mock_get_installation_path.return_value = "/tmp/dest"
+        mock_symlink.side_effect = OSError("Install deps symlink error")
+
+        LocalPinnedPackage("local").install("dummy", "dummy")
+        self.assertEqual(mock_shutil.call_count, 1)
+        mock_shutil.assert_called_once_with("/tmp/source", "/tmp/dest")
+
     def test_invalid(self):
         with self.assertRaises(ValidationError):
             GitPackage.validate(