From 56d8b43e2aef6886dc824311dd07c78ab7f8b1c0 Mon Sep 17 00:00:00 2001
From: Dmitry Selyutin <ghostmansd@gmail.com>
Date: Mon, 2 Jul 2018 01:02:30 +0300
Subject: parser: support empty --lgpl argument

---
 pygnulib/parser.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pygnulib/parser.py b/pygnulib/parser.py
index cc99bc5396..6a80902400 100644
--- a/pygnulib/parser.py
+++ b/pygnulib/parser.py
@@ -197,12 +197,12 @@ class CommandLine:
 
     class _LGPLOption(_Option):
         def __call__(self, parser, namespace, value, option=None):
-            if value not in {"2", "3", "yes", "3orGPLv2"}:
+            if value not in {None, "2", "3", "3orGPLv2"}:
                 parser.error("argument --lgpl: 2, 3, yes or 3orGPLv2")
             value = {
+                None: _LGPL_LICENSES,
                 "2": _LGPLv2_LICENSE,
                 "3": _LGPLv3_LICENSE,
-                "yes": _LGPL_LICENSES,
                 "3orGPLv2": (_GPLv2_LICENSE | _LGPLv3_LICENSE),
             }[value]
             super().__call__(parser, namespace, value, option)
@@ -715,6 +715,7 @@ class CommandLine:
                         "the default is currently LGPLv3.",
                     ),
                     "action": _LGPLOption,
+                    "nargs": "?",
                     "dest": "licenses",
                     "metavar": "[=2|=3orGPLv2|=3]",
                 }),
-- 
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