fix the cli to download both S1A/B if only date is specified

pointed out by @bbuzz31 that the help string was wrong, and it would error without the mission

eof/cli.py

@@ -28,19 +28,26 @@
     help="Specify path to download only 1 .EOF for a Sentinel-1 file/folder",
     show_default=True,
 )
-@click.option("--date", "-d", help="Validity date for EOF to download")
+@click.option(
+    "--date",
+    "-d",
+    help="Alternative to specifying Sentinel products: choose date to download for.",
+)
 @click.option(
     "--mission",
     "-m",
     type=click.Choice(["S1A", "S1B"]),
-    help="Optionally specify Sentinel satellite to download (default: gets both S1A and S1B)",
+    help=(
+        "If using `--date`, optionally specify Sentinel satellite to download"
+        " (default: gets both S1A and S1B)"
+    ),
 )
 @click.option(
     "--orbit-type",
     type=click.Choice(["precise", "restituted"]),
     default="precise",
     help="Optionally specify the type of orbit file to get "
-         "(default: precise (POEORB), but fallback to restituted (RESORB))",
+    "(default: precise (POEORB), but fallback to restituted (RESORB))",
 )
 def cli(search_path, save_dir, sentinel_file, date, mission, orbit_type):
     """Download Sentinel precise orbit files.

eof/download.py

@@ -65,7 +65,7 @@ def download_eofs(orbit_dts=None, missions=None, sentinel_file=None, save_dir=".
     if not missions:
         missions = itertools.repeat(None)
 
-    # First make sures all are datetimes if given string
+    # First make sure all are datetimes if given string
     orbit_dts = [parse(dt) if isinstance(dt, str) else dt for dt in orbit_dts]
 
     filenames = []
@@ -216,15 +216,15 @@ def main(search_path=".", save_dir=",", sentinel_file=None, mission=None, date=N
         logger.info("Creating directory for output: %s", save_dir)
         os.mkdir(save_dir)
 
-    if (mission and not date) or (date and not mission):
-        raise ValueError("Must specify date and mission together")
+    if (mission and not date):
+        raise ValueError("Must specify date if providing mission.")
 
     if sentinel_file:
         # Handle parsing in download_eof
         orbit_dts, missions = None, None
     elif date:
-        orbit_dts = [date]
-        missions = [mission]
+        missions = [mission] if mission else ["S1A", "S1B"]
+        orbit_dts = [date] * len(missions)
     else:
         # No command line args given: search current directory
         orbit_dts, missions = find_scenes_to_download(

setup.py

@@ -5,7 +5,7 @@
 
 setuptools.setup(
     name="sentineleof",
-    version="0.6.4",
+    version="0.6.5",
     author="Scott Staniewicz",
     author_email="scott.stanie@gmail.com",
     description="Download precise orbit files for Sentinel 1 products",