Make 'contrib' installed by default. (#235)

* Make 'contrib' installed by default.
- renames contrib 'opentimelineio_contrib' and installs it via the setup.py
- add code in manifest.py to automatically look for the contrib manifest.
- update makefile to run tests in new location
* Minor fix for the ALE adapter that was causing a warning in python3.

Author: ssteinbach

Makefile

@@ -24,7 +24,7 @@ test-core: python-version
 
 test-contrib: python-version
 	@echo "Running Contrib tests..."
-	@make -C contrib/adapters test VERBOSE=$(VERBOSE)
+	@make -C opentimelineio_contrib/adapters test VERBOSE=$(VERBOSE)
 
 python-version:
 	@python --version

opentimelineio/plugins/manifest.py

@@ -25,6 +25,7 @@
 """Implementation of an adapter registry system for OTIO."""
 
 import os
+import inspect
 
 from .. import (
     core,
@@ -120,16 +121,40 @@ def load_manifest():
     # build the manifest of adapters, starting with builtin adapters
     result = manifest_from_file(
         os.path.join(
-            os.path.dirname(os.path.dirname(__file__)),
+            os.path.dirname(os.path.dirname(inspect.getsourcefile(core))),
             "adapters",
             "builtin_adapters.plugin_manifest.json"
         )
     )
 
+    # layer contrib plugins after built in ones
+    try:
+        import opentimelineio_contrib as otio_c
+
+        contrib_manifest = manifest_from_file(
+            os.path.join(
+                os.path.dirname(inspect.getsourcefile(otio_c)),
+                "adapters",
+                "contrib_adapters.plugin_manifest.json"
+            )
+        )
+        result.adapters.extend(contrib_manifest.adapters)
+        result.media_linkers.extend(contrib_manifest.media_linkers)
+    except ImportError:
+        pass
+
     # read local adapter manifests, if they exist
     _local_manifest_path = os.environ.get("OTIO_PLUGIN_MANIFEST_PATH", None)
     if _local_manifest_path is not None:
         for json_path in _local_manifest_path.split(":"):
+            if not os.path.exists(json_path):
+                # XXX: In case error reporting is requested
+                # print(
+                #     "Warning: OpenTimelineIO cannot access path '{}' from "
+                #     "$OTIO_PLUGIN_MANIFEST_PATH".format(json_path)
+                # )
+                continue
+
             LOCAL_MANIFEST = manifest_from_file(json_path)
             result.adapters.extend(LOCAL_MANIFEST.adapters)
             result.media_linkers.extend(LOCAL_MANIFEST.media_linkers)

opentimelineio_contrib/__init__.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+#
+# Copyright 2018 Pixar Animation Studios
+#
+# Licensed under the Apache License, Version 2.0 (the "Apache License")
+# with the following modification; you may not use this file except in
+# compliance with the Apache License and the following modification to it:
+# Section 6. Trademarks. is deleted and replaced with:
+#
+# 6. Trademarks. This License does not grant permission to use the trade
+#    names, trademarks, service marks, or product names of the Licensor
+#    and its affiliates, except as required to comply with Section 4(c) of
+#    the License and to reproduce the content of the NOTICE file.
+#
+# You may obtain a copy of the Apache License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the Apache License with the above modification is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the Apache License for the specific
+# language governing permissions and limitations under the Apache License.
+#
+
+"""Unsupported contrib code for OpenTimelineIO."""
+
+# flake8: noqa
+
+from . import (
+    adapters
+)

contrib/adapters/Makefile renamed to opentimelineio_contrib/adapters/Makefile

@@ -1,7 +1,6 @@
 # Makefile for the contrib area
 
 export PYTHONPATH:=../../
-export OTIO_PLUGIN_MANIFEST_PATH:=contrib_adapters.plugin_manifest.json
 TEST_ARGS=
 
 ifeq ($(VERBOSE), 1)