Add -s option to select a date as seconds from the Epoch

1 files changed, 10 insertions, 1 deletions

diff --git a/debdate b/debdate
index 2615b30..fbb9a30 100755
--- a/debdate
+++ b/debdate
@@ -156,11 +156,18 @@ class Command:
             Convert Gregorian dates to Debian Regnal dates
             '''
             )
-        self.parser.add_argument(
+        self.date_options = self.parser.add_mutually_exclusive_group()
+        self.date_options.add_argument(
             '-d', '--date',
             help='A gregorian date',
             default='',
             )
+        self.date_options.add_argument(
+            '-s', '--seconds',
+            help='A date as seconds from the Unix Epoch',
+            default=None,
+            type=int,
+            )
         self.parser.set_defaults(func=self.print_date)
         self.subparsers = self.parser.add_subparsers()
         self.test_parser = self.subparsers.add_parser(
@@ -176,6 +183,8 @@ class Command:
     def print_date(self, args):
         if args.date:
             date = parser.parse(args.date).date()
+        elif args.seconds:
+            date = datetime.date.fromtimestamp(args.seconds)
         else:
             date = datetime.date.today()
         debdate = DebDate()