From 0eee52f34bfa55ba9d4ebfc4b4ba508c989f05b0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sergey=20M=E2=80=A4?= <dstftw@gmail.com>
Date: Mon, 24 Apr 2017 03:09:08 +0700
Subject: [PATCH] Introduce --keep-fragments

---
 youtube_dl/__init__.py            | 1 +
 youtube_dl/downloader/fragment.py | 5 ++++-
 youtube_dl/options.py             | 4 ++++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index f15606568..c4589411e 100644
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -343,6 +343,7 @@ def _real_main(argv=None):
         'retries': opts.retries,
         'fragment_retries': opts.fragment_retries,
         'skip_unavailable_fragments': opts.skip_unavailable_fragments,
+        'keep_fragments': opts.keep_fragments,
         'buffersize': opts.buffersize,
         'noresizebuffer': opts.noresizebuffer,
         'continuedl': opts.continue_dl,
diff --git a/youtube_dl/downloader/fragment.py b/youtube_dl/downloader/fragment.py
index 62de0a75b..bcff94cbe 100644
--- a/youtube_dl/downloader/fragment.py
+++ b/youtube_dl/downloader/fragment.py
@@ -29,6 +29,8 @@ class FragmentFD(FileDownloader):
                         and hlsnative only)
     skip_unavailable_fragments:
                         Skip unavailable fragments (DASH and hlsnative only)
+    keep_fragments:     Keep downloaded fragments on disk after downloading is
+                        finished
     """
 
     def report_retry_fragment(self, err, frag_index, count, retries):
@@ -81,7 +83,8 @@ class FragmentFD(FileDownloader):
         finally:
             if not (ctx.get('live') or ctx['tmpfilename'] == '-'):
                 self._write_ytdl_file(ctx)
-            os.remove(ctx['fragment_filename_sanitized'])
+            if not self.params.get('keep_fragments', False):
+                os.remove(ctx['fragment_filename_sanitized'])
             del ctx['fragment_filename_sanitized']
 
     def _prepare_frag_download(self, ctx):
diff --git a/youtube_dl/options.py b/youtube_dl/options.py
index 2d2f5e47b..52309fb84 100644
--- a/youtube_dl/options.py
+++ b/youtube_dl/options.py
@@ -468,6 +468,10 @@ def parseOpts(overrideArguments=None):
         '--abort-on-unavailable-fragment',
         action='store_false', dest='skip_unavailable_fragments',
         help='Abort downloading when some fragment is not available')
+    downloader.add_option(
+        '--keep-fragments',
+        action='store_true', dest='keep_fragments', default=False,
+        help='Keep downloaded fragments on disk after downloading is finished; fragments are erased by default')
     downloader.add_option(
         '--buffer-size',
         dest='buffersize', metavar='SIZE', default='1024',