fix windows path handling

dvc/repo/metrics/show.py

@@ -9,7 +9,12 @@ from dvc.output import Output
 from dvc.repo import locked
 from dvc.repo.collect import StrPaths, collect
 from dvc.scm import NoSCMError
-from dvc.utils import error_handler, errored_revisions, onerror_collect
+from dvc.utils import (
+    as_posix,
+    error_handler,
+    errored_revisions,
+    onerror_collect,
+)
 from dvc.utils.collections import ensure_list
 from dvc.utils.serialize import load_path
 
@@ -31,12 +36,12 @@ def _to_fs_paths(metrics: List[Output]) -> StrPaths:
 def _collect_top_level_metrics(repo):
     top_metrics = repo.index._top_metrics  # pylint: disable=protected-access
     for dvcfile, metrics in top_metrics.items():
-        wdir = repo.dvcfs.path.relpath(
-            repo.dvcfs.path.parent(dvcfile), repo.root_dir
+        wdir = repo.fs.path.relpath(
+            repo.fs.path.parent(dvcfile), repo.root_dir
         )
         for file in metrics:
-            path = repo.dvcfs.path.join(wdir, file)
-            yield repo.dvcfs.path.normpath(path)
+            path = repo.fs.path.join(wdir, as_posix(file))
+            yield repo.fs.path.normpath(path)
 
 
 def _collect_metrics(repo, targets, revision, recursive):

dvc/repo/params/show.py

@@ -20,7 +20,12 @@ from dvc.repo.collect import collect
 from dvc.scm import NoSCMError
 from dvc.stage import PipelineStage
 from dvc.ui import ui
-from dvc.utils import error_handler, errored_revisions, onerror_collect
+from dvc.utils import (
+    as_posix,
+    error_handler,
+    errored_revisions,
+    onerror_collect,
+)
 from dvc.utils.collections import ensure_list
 from dvc.utils.serialize import load_path
 
@@ -38,12 +43,12 @@ def _is_params(dep: "Output"):
 def _collect_top_level_params(repo):
     top_params = repo.index._top_params  # pylint: disable=protected-access
     for dvcfile, params in top_params.items():
-        wdir = repo.dvcfs.path.relpath(
-            repo.dvcfs.path.parent(dvcfile), repo.root_dir
+        wdir = repo.fs.path.relpath(
+            repo.fs.path.parent(dvcfile), repo.root_dir
         )
         for file in params:
-            path = repo.dvcfs.path.join(wdir, file)
-            yield repo.dvcfs.path.normpath(path)
+            path = repo.fs.path.join(wdir, as_posix(file))
+            yield repo.fs.path.normpath(path)
 
 
 def _collect_configs(