[skip travis] adding automerge support

basically copying content of youtube_dl folder to youtube_dlc and excluding the youtube_dl folder when compiling

youtube_dl/downloader/__init__.py

@@ -0,0 +1,63 @@
+from __future__ import unicode_literals
+
+from .common import FileDownloader
+from .f4m import F4mFD
+from .hls import HlsFD
+from .http import HttpFD
+from .rtmp import RtmpFD
+from .dash import DashSegmentsFD
+from .rtsp import RtspFD
+from .ism import IsmFD
+from .youtube_live_chat import YoutubeLiveChatReplayFD
+from .external import (
+    get_external_downloader,
+    FFmpegFD,
+)
+
+from ..utils import (
+    determine_protocol,
+)
+
+PROTOCOL_MAP = {
+    'rtmp': RtmpFD,
+    'm3u8_native': HlsFD,
+    'm3u8': FFmpegFD,
+    'mms': RtspFD,
+    'rtsp': RtspFD,
+    'f4m': F4mFD,
+    'http_dash_segments': DashSegmentsFD,
+    'ism': IsmFD,
+    'youtube_live_chat_replay': YoutubeLiveChatReplayFD,
+}
+
+
+def get_suitable_downloader(info_dict, params={}):
+    """Get the downloader class that can handle the info dict."""
+    protocol = determine_protocol(info_dict)
+    info_dict['protocol'] = protocol
+
+    # if (info_dict.get('start_time') or info_dict.get('end_time')) and not info_dict.get('requested_formats') and FFmpegFD.can_download(info_dict):
+    #     return FFmpegFD
+
+    external_downloader = params.get('external_downloader')
+    if external_downloader is not None:
+        ed = get_external_downloader(external_downloader)
+        if ed.can_download(info_dict):
+            return ed
+
+    if protocol.startswith('m3u8') and info_dict.get('is_live'):
+        return FFmpegFD
+
+    if protocol == 'm3u8' and params.get('hls_prefer_native') is True:
+        return HlsFD
+
+    if protocol == 'm3u8_native' and params.get('hls_prefer_native') is False:
+        return FFmpegFD
+
+    return PROTOCOL_MAP.get(protocol, HttpFD)
+
+
+__all__ = [
+    'get_suitable_downloader',
+    'FileDownloader',
+]