From 2cc779f497ae20d6e0e28fc546a25723cfea631a Mon Sep 17 00:00:00 2001
From: Sergey M․ <dstftw@gmail.com>
Date: Sun, 20 Jan 2019 13:48:09 +0700
Subject: [YoutubeDL] Add negation support for string comparisons in format
 selection expressions (closes #18600, closes #18805)

---
 youtube_dl/YoutubeDL.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

(limited to 'youtube_dl/YoutubeDL.py')

diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index 4493fd0e1..a827414dc 100755
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -1063,21 +1063,24 @@ class YoutubeDL(object):
         if not m:
             STR_OPERATORS = {
                 '=': operator.eq,
-                '!=': operator.ne,
                 '^=': lambda attr, value: attr.startswith(value),
                 '$=': lambda attr, value: attr.endswith(value),
                 '*=': lambda attr, value: value in attr,
             }
             str_operator_rex = re.compile(r'''(?x)
                 \s*(?P<key>ext|acodec|vcodec|container|protocol|format_id)
-                \s*(?P<op>%s)(?P<none_inclusive>\s*\?)?
+                \s*(?P<negation>!\s*)?(?P<op>%s)(?P<none_inclusive>\s*\?)?
                 \s*(?P<value>[a-zA-Z0-9._-]+)
                 \s*$
                 ''' % '|'.join(map(re.escape, STR_OPERATORS.keys())))
             m = str_operator_rex.search(filter_spec)
             if m:
                 comparison_value = m.group('value')
-                op = STR_OPERATORS[m.group('op')]
+                str_op = STR_OPERATORS[m.group('op')]
+                if m.group('negation'):
+                    op = lambda attr, value: not str_op
+                else:
+                    op = str_op
 
         if not m:
             raise ValueError('Invalid filter specification %r' % filter_spec)
-- 
cgit 1.4.1