From 177e80b966da03e83df410c23ebf13643ec88c33 Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Thu, 11 Jun 2020 15:36:43 +0000
Subject: [PATCH] nmigen.cli: fix file type autodetection code.

---
 nmigen/cli.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nmigen/cli.py b/nmigen/cli.py
index e6757a0..e530692 100644
--- a/nmigen/cli.py
+++ b/nmigen/cli.py
@@ -17,7 +17,7 @@ def main_parser(parser=None):
         help="generate RTLIL or Verilog from the design")
     p_generate.add_argument("-t", "--type", dest="generate_type",
         metavar="LANGUAGE", choices=["il", "v"],
-        default="v",
+        default=None,
         help="generate LANGUAGE (il for RTLIL, v for Verilog; default: %(default)s)")
     p_generate.add_argument("generate_file",
         metavar="FILE", type=argparse.FileType("w"), nargs="?",
-- 
2.30.2