Update: product type and selector are mandatory

Author: heptaflar

README.md

@@ -21,8 +21,8 @@ processor. The processor is invoked from the command line. Typing
 will print a detailed usage message to the screen
 
     usage: kaleidoscope [-h]
-                        [--product-type {esa-cci-oc,esa-scope-exchange,ghrsst,glorys}]
-                        [--selector SELECTOR]
+                        --product-type {esa-cci-oc,esa-scope-exchange,ghrsst,glorys}
+                        --selector SELECTOR
                         [--engine-reader {h5netcdf,netcdf4,zarr}]
                         [--engine-writer {h5netcdf,netcdf4,zarr}]
                         [--log-level {debug,info,warning,error,off}]

kaleidoscope/parser.py

@@ -68,15 +68,15 @@ def _add_options(parser):
             "--product-type",
             help="the product type.",
             choices=["esa-cci-oc", "esa-scope-exchange", "ghrsst", "glorys"],
-            required=False,
+            required=True,
             dest="product_type",
         )
         parser.add_argument(
             "--selector",
             help="the Monte Carlo stream selector. An integral number which "
             "must not be negative.",
             type=Parser.IntType(0),
-            required=False,
+            required=True,
             dest="selector",
         )
         parser.add_argument(