From 3273672854919bea33829ac7e33a60286f2dcc7b Mon Sep 17 00:00:00 2001
From: Steven Wallace <snwallace@gmail.com>
Date: Wed, 22 Jul 2015 20:55:43 -0500
Subject: [PATCH] Basic playlist generation logic.

---
 README.md               | 1 +
 youtube_dl/YoutubeDL.py | 9 +++++++++
 youtube_dl/__init__.py  | 1 +
 youtube_dl/options.py   | 4 ++++
 4 files changed, 15 insertions(+)

diff --git a/README.md b/README.md
index df419abe8..5625b88ba 100644
--- a/README.md
+++ b/README.md
@@ -237,6 +237,7 @@ which means you can modify it, redistribute it or use it however you like.
     --write-info-json                Write video metadata to a .info.json file
     --write-annotations              Write video annotations to a
                                      .annotations.xml file
+    --write-playlists                Write playlists to .m3u files
     --load-info FILE                 JSON file containing the video information
                                      (created with the "--write-info-json"
                                      option)
diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index 9a8c7da05..8566ac652 100755
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -835,6 +835,15 @@ class YoutubeDL(object):
                                                       extra_info=extra)
                 playlist_results.append(entry_result)
             ie_result['entries'] = playlist_results
+
+            if download and self.params.get('writeplaylists'):
+                ie_result['ext'] = 'm3u'
+                playlist_filename = self.prepare_filename(ie_result)
+                playlist_file = open(playlist_filename, 'w')
+                for entry in ie_result['entries']:
+                    filename = self.prepare_filename(entry)
+                    playlist_file.write(filename + '\n')
+
             self.to_screen('[download] Finished downloading playlist: %s' % playlist)
             return ie_result
         elif result_type == 'compat_list':
diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index 9f131f5db..29d234f86 100644
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -320,6 +320,7 @@ def _real_main(argv=None):
         'write_all_thumbnails': opts.write_all_thumbnails,
         'writesubtitles': opts.writesubtitles,
         'writeautomaticsub': opts.writeautomaticsub,
+        'writeplaylists': opts.writeplaylists,
         'allsubtitles': opts.allsubtitles,
         'listsubtitles': opts.listsubtitles,
         'subtitlesformat': opts.subtitlesformat,
diff --git a/youtube_dl/options.py b/youtube_dl/options.py
index 359e8d300..bdb6dda39 100644
--- a/youtube_dl/options.py
+++ b/youtube_dl/options.py
@@ -643,6 +643,10 @@ def parseOpts(overrideArguments=None):
         '--write-annotations',
         action='store_true', dest='writeannotations', default=False,
         help='Write video annotations to a .annotations.xml file')
+    filesystem.add_option(
+        '--write-playlists',
+        action='store_true', dest='writeplaylists', default=False,
+        help='Write playlists to .m3u files')
     filesystem.add_option(
         '--load-info',
         dest='load_info_filename', metavar='FILE',