Allow setting of log level via WUBLOADER_LOG_LEVEL env var

By using an env var, it is universal and happens prior to arg parsing,
at the same point we do other logging setup.

downloader/downloader/__main__.py

@@ -3,6 +3,7 @@ import gevent.monkey
 gevent.monkey.patch_all()
 
 import logging
+import os
 
 import argh
 
@@ -10,5 +11,6 @@ from downloader.main import main
 
 LOG_FORMAT = "[%(asctime)s] %(levelname)8s %(name)s(%(module)s:%(lineno)d): %(message)s"
 
-logging.basicConfig(level=logging.INFO, format=LOG_FORMAT)
+level = os.environ.get('WUBLOADER_LOG_LEVEL', 'INFO').upper()
+logging.basicConfig(level=level, format=LOG_FORMAT)
 argh.dispatch_command(main)

restreamer/restreamer/__main__.py

@@ -3,6 +3,7 @@ import gevent.monkey
 gevent.monkey.patch_all()
 
 import logging
+import os
 
 import argh
 
@@ -10,5 +11,6 @@ from restreamer.main import main
 
 LOG_FORMAT = "[%(asctime)s] %(levelname)8s %(name)s(%(module)s:%(lineno)d): %(message)s"
 
-logging.basicConfig(level=logging.INFO, format=LOG_FORMAT)
+level = os.environ.get('WUBLOADER_LOG_LEVEL', 'INFO').upper()
+logging.basicConfig(level=level, format=LOG_FORMAT)
 argh.dispatch_command(main)