From 25e3acdee6790f93216c9cdb38043c25a1244721 Mon Sep 17 00:00:00 2001
From: "Sadie L. Bartholomew" <sadie.bartholomew@ncas.ac.uk>
Date: Fri, 4 Sep 2026 23:33:16 +0100
Subject: [PATCH 1/4] Add missing optional deps, pyproj & healpix, to env
 output

---
 cf/functions.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cf/functions.py b/cf/functions.py
index 04d7555438..2b3b566931 100644
--- a/cf/functions.py
+++ b/cf/functions.py
@@ -3,6 +3,7 @@
 import warnings
 from collections.abc import Iterable
 from functools import lru_cache, partial
+from importlib.metadata import version
 from importlib.util import find_spec
 from itertools import product
 from os import mkdir
@@ -3123,6 +3124,11 @@ def environment(display=True, paths=True):
         "cartopy": _get_module_info("cartopy", try_except=True),
         "cfplot": _get_module_info("cfplot", try_except=True),
         "cf": (__version__, _os_path_abspath(__file__)),
+        # Healpix module doesn't define a __version__, so can't as standard use
+        # _get_module_info, but I have opened an Issue with them to define
+        # this (see: TODO)
+        "healpix": (version("healpix"), find_spec("healpix").origin),
+        "pyproj": _get_module_info("pyproj", try_except=True),
     }
     string = "{0}: {1!s}"
     if paths:

From b08cab417756a3b60c06214735feceed1a2466f0 Mon Sep 17 00:00:00 2001
From: "Sadie L. Bartholomew" <sadie.bartholomew@ncas.ac.uk>
Date: Fri, 4 Sep 2026 23:37:32 +0100
Subject: [PATCH 2/4] Sort asciibetically output of cf.environment()

---
 cf/functions.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cf/functions.py b/cf/functions.py
index 2b3b566931..6a6db27269 100644
--- a/cf/functions.py
+++ b/cf/functions.py
@@ -3142,6 +3142,12 @@ def environment(display=True, paths=True):
         ]
     )
 
+    # There are a lot of dependencies (compulsory + optional) to print so
+    # show them in asciibetical order, with the happy coincidence that the
+    # 'cf*' libraries, 'Platform' and 'Python' still come near the top (the
+    # (latter because of the capitalisation) so are easy to pick out.
+    out.sort()
+
     if display:
         print("\n".join(out))  # pragma: no cover
     else:

From 068c51bf3f7f8bc327429655f7895e74914f2383 Mon Sep 17 00:00:00 2001
From: "Sadie L. Bartholomew" <sadie.bartholomew@ncas.ac.uk>
Date: Fri, 4 Sep 2026 23:49:45 +0100
Subject: [PATCH 3/4] Update test_functions for cf.environment() new order &
 entries

---
 cf/test/test_functions.py | 47 +++++++++++++++++++++------------------
 1 file changed, 25 insertions(+), 22 deletions(-)

diff --git a/cf/test/test_functions.py b/cf/test/test_functions.py
index 23f0306ada..f65eba8819 100644
--- a/cf/test/test_functions.py
+++ b/cf/test/test_functions.py
@@ -302,36 +302,39 @@ def test_environment(self):
 
         # Expected full set of components
         expected = [
+            "HDF5 library",
             "Platform",
             "Python",
-            "packaging",
-            "numpy",
+            "activestorage",
+            "cartopy",
+            "cf",
+            "cfdm",
             "cfdm.core",
-            "udunits2 library",
-            "HDF5 library",
-            "netcdf library",
-            "netCDF4",
-            "xnetcdf",
-            "h5netcdf",
-            "h5py",
-            "pyfive",
-            "zarr",
-            "fsspec",
-            "scipy",
-            "dask",
-            "distributed",
+            "cfplot",
             "cftime",
             "cfunits",
-            "cfdm",
+            "dask",
+            "distributed",
             "esmpy/ESMF",
-            "psutil",
+            "fsspec",
+            "h5netcdf",
+            "h5py",
+            "healpix",
             "matplotlib",
-            "activestorage",
-            "cartopy",
-            "cfplot",
-            "cf",
-            "xarray",
+            "netCDF4",
+            "netcdf library",
+            "numpy",
+            "packaging",
+            "psutil",
+            "pyfive",
+            "pyproj",
+            "scipy",
+            "udunits2 library",
             "umfive",
+            "uritools",
+            "xarray",
+            "xnetcdf",
+            "zarr",
         ]
 
         # Ensure all expected components are present

From 250ca5b25149727aa51b64eb5586a9deb65387fb Mon Sep 17 00:00:00 2001
From: "Sadie L. Bartholomew" <sadie.bartholomew@ncas.ac.uk>
Date: Mon, 7 Sep 2026 16:52:18 +0100
Subject: [PATCH 4/4] Include link to Issue for tracking in cf.environment()
 comment

---
 cf/functions.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cf/functions.py b/cf/functions.py
index 6a6db27269..1adff73ac2 100644
--- a/cf/functions.py
+++ b/cf/functions.py
@@ -3126,7 +3126,7 @@ def environment(display=True, paths=True):
         "cf": (__version__, _os_path_abspath(__file__)),
         # Healpix module doesn't define a __version__, so can't as standard use
         # _get_module_info, but I have opened an Issue with them to define
-        # this (see: TODO)
+        # this (see: https://github.com/ntessore/healpix/issues/108)
         "healpix": (version("healpix"), find_spec("healpix").origin),
         "pyproj": _get_module_info("pyproj", try_except=True),
     }