[options] Correctly hide login info from debug outputs (#13696)

Iterate over opts instead of PRIVATE_OPTS for both performance and
correctness

ChangeLog

@@ -1,3 +1,9 @@
+version <unreleased>
+
+Core
+* [options] Correctly hide login info from debug outputs (#13696)
+
+
 version 2017.07.23
 
 Core

test/test_options.py

@@ -0,0 +1,26 @@
+# coding: utf-8
+
+from __future__ import unicode_literals
+
+# Allow direct execution
+import os
+import sys
+import unittest
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from youtube_dl.options import _hide_login_info
+
+
+class TestOptions(unittest.TestCase):
+    def test_hide_login_inf(self):
+        self.assertEqual(_hide_login_info(['-u', 'foo', '-p', 'bar']),
+                         ['-u', 'PRIVATE', '-p', 'PRIVATE'])
+        self.assertEqual(_hide_login_info(['-u']), ['-u'])
+        self.assertEqual(_hide_login_info(['-u', 'foo', '-u', 'bar']),
+                         ['-u', 'PRIVATE', '-u', 'PRIVATE'])
+        self.assertEqual(_hide_login_info(['--username=foo']),
+                         ['--username=PRIVATE'])
+
+
+if __name__ == '__main__':
+    unittest.main()

youtube_dl/options.py

@@ -20,6 +20,24 @@
 from .version import __version__
 
 
+def _hide_login_info(opts):
+    PRIVATE_OPTS = set(['-p', '--password', '-u', '--username', '--video-password', '--ap-password', '--ap-username'])
+    eqre = re.compile('^(?P<key>' + ('|'.join(re.escape(po) for po in PRIVATE_OPTS)) + ')=.+$')
+
+    def _scrub_eq(o):
+        m = eqre.match(o)
+        if m:
+            return m.group('key') + '=PRIVATE'
+        else:
+            return o
+
+    opts = list(map(_scrub_eq, opts))
+    for idx, opt in enumerate(opts):
+        if opt in PRIVATE_OPTS and idx + 1 < len(opts):
+            opts[idx + 1] = 'PRIVATE'
+    return opts
+
+
 def parseOpts(overrideArguments=None):
     def _readOptions(filename_bytes, default=[]):
         try:
@@ -93,26 +111,6 @@ def _format_option_string(option):
     def _comma_separated_values_options_callback(option, opt_str, value, parser):
         setattr(parser.values, option.dest, value.split(','))
 
-    def _hide_login_info(opts):
-        PRIVATE_OPTS = ['-p', '--password', '-u', '--username', '--video-password', '--ap-password', '--ap-username']
-        eqre = re.compile('^(?P<key>' + ('|'.join(re.escape(po) for po in PRIVATE_OPTS)) + ')=.+$')
-
-        def _scrub_eq(o):
-            m = eqre.match(o)
-            if m:
-                return m.group('key') + '=PRIVATE'
-            else:
-                return o
-
-        opts = list(map(_scrub_eq, opts))
-        for private_opt in PRIVATE_OPTS:
-            try:
-                i = opts.index(private_opt)
-                opts[i + 1] = 'PRIVATE'
-            except ValueError:
-                pass
-        return opts
-
     # No need to wrap help messages if we're on a wide console
     columns = compat_get_terminal_size().columns
     max_width = columns if columns else 80