From f3160fc1a034174f972be3b49433d1c79b98fec4 Mon Sep 17 00:00:00 2001
From: Kai Muehlbauer <kai.muehlbauer@uni-bonn.de>
Date: Wed, 5 Feb 2020 09:37:11 +0100
Subject: [PATCH 1/3] ADD: add `phony_dims` keyword arg to h5netcdf backend
 available from h5netcdf v0.8.0

---
 xarray/backends/h5netcdf_.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/xarray/backends/h5netcdf_.py b/xarray/backends/h5netcdf_.py
index 2b7c2d9057c..edb996e5beb 100644
--- a/xarray/backends/h5netcdf_.py
+++ b/xarray/backends/h5netcdf_.py
@@ -1,4 +1,5 @@
 import functools
+from distutils.version import LooseVersion
 
 import numpy as np
 
@@ -117,6 +118,7 @@ def open(
         lock=None,
         autoclose=False,
         invalid_netcdf=None,
+        phony_dims=None,
     ):
         import h5netcdf
 
@@ -124,6 +126,14 @@ def open(
             raise ValueError("invalid format for h5netcdf backend")
 
         kwargs = {"invalid_netcdf": invalid_netcdf}
+        if phony_dims is not None:
+            if LooseVersion(h5netcdf.__version__) >= LooseVersion("0.8.0"):
+                kwargs["phony_dims"] = phony_dims
+            else:
+                raise (
+                    "h5netcdf backend keyword argument 'phony_dims' needs "
+                    "h5netcdf >= 0.8.0."
+                )
 
         if lock is None:
             if mode == "r":

From ee0db0b95d0f4d528521570e1b1bc58ee8140b09 Mon Sep 17 00:00:00 2001
From: Kai Muehlbauer <kai.muehlbauer@uni-bonn.de>
Date: Wed, 5 Feb 2020 09:38:28 +0100
Subject: [PATCH 2/3] ADD: add `whats-new.rst` entry

---
 doc/whats-new.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/doc/whats-new.rst b/doc/whats-new.rst
index 7fa70d0b67a..1615834dc4b 100644
--- a/doc/whats-new.rst
+++ b/doc/whats-new.rst
@@ -24,6 +24,9 @@ Breaking changes
 
 New Features
 ~~~~~~~~~~~~
+- Support new h5netcdf backend keyword `phony_dims` (available from h5netcdf
+  v0.8.0 for :py:class:`~xarray.backends.H5NetCDFStore`.
+  By `Kai Mühlbauer <https://github.com/kmuehlbauer>`_.
 
 Bug fixes
 ~~~~~~~~~

From e9f814f3ec1e90ba3251a319612a486c3f34ce5a Mon Sep 17 00:00:00 2001
From: Kai Muehlbauer <kai.muehlbauer@uni-bonn.de>
Date: Thu, 6 Feb 2020 17:01:46 +0100
Subject: [PATCH 3/3] FIX: raise ValueError

---
 xarray/backends/h5netcdf_.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xarray/backends/h5netcdf_.py b/xarray/backends/h5netcdf_.py
index edb996e5beb..393db14a7e9 100644
--- a/xarray/backends/h5netcdf_.py
+++ b/xarray/backends/h5netcdf_.py
@@ -130,7 +130,7 @@ def open(
             if LooseVersion(h5netcdf.__version__) >= LooseVersion("0.8.0"):
                 kwargs["phony_dims"] = phony_dims
             else:
-                raise (
+                raise ValueError(
                     "h5netcdf backend keyword argument 'phony_dims' needs "
                     "h5netcdf >= 0.8.0."
                 )