add 'output.skip' option

docs/configuration.rst

@@ -2081,6 +2081,16 @@ Description
     on one console line.
 
 
+output.skip
+-----------
+Type
+    ``bool``
+Default
+    ``true``
+Description
+    Show skipped file downloads.
+
+
 output.progress
 ---------------
 Type

docs/gallery-dl.conf

@@ -320,6 +320,7 @@
         "mode": "auto",
         "progress": true,
         "shorten": true,
+        "skip": true,
         "log": "[{name}][{levelname}] {message}",
         "logfile": null,
         "unsupportedfile": null

gallery_dl/output.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright 2015-2020 Mike Fährmann
+# Copyright 2015-2021 Mike Fährmann
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
@@ -232,15 +232,19 @@ def select():
     }
     omode = config.get(("output",), "mode", "auto").lower()
     if omode in pdict:
-        return pdict[omode]()
+        output = pdict[omode]()
     elif omode == "auto":
         if hasattr(sys.stdout, "isatty") and sys.stdout.isatty():
-            return ColorOutput() if ANSI else TerminalOutput()
+            output = ColorOutput() if ANSI else TerminalOutput()
         else:
-            return PipeOutput()
+            output = PipeOutput()
     else:
         raise Exception("invalid output mode: " + omode)
 
+    if not config.get(("output",), "skip", True):
+        output.skip = util.identity
+    return output
+
 
 class NullOutput():