Expanduser (~) for open_dataset with dask (#6710)

Author: headtr1ck

doc/whats-new.rst

@@ -47,6 +47,9 @@ Bug fixes
   pandas when decoding times outside the range that can be represented with
   nanosecond-precision values (:issue:`6716`, :pull:`6717`).
   By `Spencer Clark <https://github.com/spencerkclark>`_.
+- :py:meth:`open_dataset` with dask and ``~`` in the path now resolves the home directory
+  instead of raising an error. (:issue:`6707`, :pull:`6710`)
+  By `Michael Niklas <https://github.com/headtr1ck>`_.
 
 Documentation
 ~~~~~~~~~~~~~

xarray/backends/api.py

@@ -224,7 +224,7 @@ def _get_mtime(filename_or_obj):
         path = None
 
     if path and not is_remote_uri(path):
-        mtime = os.path.getmtime(filename_or_obj)
+        mtime = os.path.getmtime(os.path.expanduser(filename_or_obj))
 
     return mtime
 

xarray/backends/rasterio_.py

@@ -412,7 +412,7 @@ def open_rasterio(
 
         # augment the token with the file modification time
         try:
-            mtime = os.path.getmtime(filename)
+            mtime = os.path.getmtime(os.path.expanduser(filename))
         except OSError:
             # the filename is probably an s3 bucket rather than a regular file
             mtime = None