[postprocessor] add 'exec' to execute user-defined processes

gallery_dl/postprocessor/exec.py

@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2018 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
+# published by the Free Software Foundation.
+
+"""Execute processes"""
+
+from .common import PostProcessor
+import subprocess
+
+
+class ExecPP(PostProcessor):
+
+    def __init__(self, options):
+        PostProcessor.__init__(self)
+        self.args = options["args"]
+
+    def run(self, pathfmt):
+        args = [
+            arg.format_map(pathfmt.keywords)
+            for arg in self.args
+        ]
+        subprocess.Popen(args)
+
+
+__postprocessor__ = ExecPP