From a27c0e75e7e96f1a29c63e1dcee744ed0b333b4d Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@tremily.us>
Date: Wed, 6 Feb 2013 09:59:11 -0500
Subject: [PATCH 1/1] cli: Add the --tags option to list tags on the stack

---
 quizzer/cli.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/quizzer/cli.py b/quizzer/cli.py
index 4df0b15..e40332f 100644
--- a/quizzer/cli.py
+++ b/quizzer/cli.py
@@ -41,6 +41,9 @@ def main():
     parser.add_argument(
         '-t', '--tag', action='append',
         help='limit original questions to those matching at least one tag')
+    parser.add_argument(
+        '--tags', action='store_const', const=True, default=False,
+        help='instead of running the quiz, print a list of tags on the stack')
     parser.add_argument(
         'quiz', metavar='QUIZ',
         help='path to a quiz file')
@@ -60,6 +63,13 @@ def main():
         stack = [question for question in quiz]
     if args.tag:
         stack = [q for q in stack if q.tags.intersection(args.tag)]
+    if args.tags:
+        tags = set()
+        for q in stack:
+            tags.update(q.tags)
+        for tag in sorted(tags):
+            print(tag)
+        return
     ui = _cli.CommandLineInterface(quiz=quiz, answers=answers, stack=stack)
     ui.run()
     ui.answers.save()
-- 
2.26.2