[postprocessor] initial code

gallery_dl/postprocessor/__init__.py

@@ -0,0 +1,32 @@
+# -*- 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.
+
+import importlib
+import logging
+
+log = logging.getLogger("postprocessor")
+
+
+def find(name):
+    """Return a postprocessor class with the given name"""
+    try:
+        return _cache[name]
+    except KeyError:
+        try:
+            module = importlib.import_module("."+name, __package__)
+            cls = module.__postprocessor__
+            _cache[name] = cls
+            return cls
+        except (ImportError, AttributeError):
+            return None
+
+
+# --------------------------------------------------------------------
+# internals
+
+_cache = {}

gallery_dl/postprocessor/common.py

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+# -*- 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.
+
+"""Common classes and constants used by postprocessor modules."""
+
+
+class PostProcessor():
+
+    def run(self, asd):
+        raise NotImplementedError()