Change area names to new naming scheme and remove some areas.

satpy/area.py

@@ -15,6 +15,10 @@
 # You should have received a copy of the GNU General Public License along with
 # satpy.  If not, see <http://www.gnu.org/licenses/>.
 """Utility functions for area definitions."""
+import warnings
+
+from pyresample.area_config import AreaNotFound, _create_area_def_from_dict, _read_yaml_area_file_content
+
 from ._config import config_search_paths, get_config_path
 
 
@@ -29,7 +33,37 @@ def get_area_file():
     else:
         return get_config_path("areas.def")
 
+def deprecate_area_name(fun):
+    """Decorator to deprecate area names.
+
+    This function is used to retire area names or warn about changed area names.
+    """
+    def area_with_new_name(area_name):
+        try:
+            return fun(area_name)
+        except AreaNotFound:
+            area_file_name = get_area_file()
+            areas_dict = _read_yaml_area_file_content(area_file_name)
+            area_dict = None
+            for new_area_name, v in areas_dict.items():
+
+                if "old_name" in v.keys() and area_name in v["old_name"]:# == area_name:
+                    area_dict = areas_dict.get(new_area_name)
+                    del area_dict["old_name"]
+                    break
+
+            if area_dict is not None:
+                warnings.simplefilter("always", DeprecationWarning)
+                warnings.warn(f"This area name is being deprecated in Satpy v1.0. Pleas use the new area name:"
+                              f" {new_area_name}", DeprecationWarning, stacklevel=2)
+                warnings.simplefilter("default", DeprecationWarning)
+                return _create_area_def_from_dict(new_area_name, area_dict)
+            else:
+                raise AreaNotFound('Area "{0}" not found in file "{1}"'.format(area_name, area_file_name))
+
+    return area_with_new_name
 
+@deprecate_area_name
 def get_area_def(area_name):
     """Get the definition of *area_name* from file.