SG-43461 SG-43644 Migrate Flow host support for Nuke

.flake8

@@ -0,0 +1,64 @@
+# Copyright (c) 2017 Shotgun Software Inc.
+#
+# CONFIDENTIAL AND PROPRIETARY
+#
+# This work is provided "AS IS" and subject to the Shotgun Pipeline Toolkit
+# Source Code License included in this distribution package. See LICENSE.
+# By accessing, using, copying or modifying this work you indicate your
+# agreement to the Shotgun Pipeline Toolkit Source Code License. All rights
+# not expressly granted therein are reserved by Shotgun Software Inc.
+
+# Flake 8 PEP and lint configuration - https://gitlab.com/pycqa/flake8
+#
+# This defines the official lint and PEP8 rules for this repository
+#
+# You can run this locally by doing pep install flake8 and then
+# >flake8 /path/to/core
+#
+# This is also used by the hound CI - see the .hound.yml config file.
+#
+#
+[flake8]
+
+# things we don't want to lint
+exclude =
+    .tox,
+    .git,
+    .flake8,
+    .gitignore,
+    .travis.yml,
+    .cache,
+    .eggs,
+    *.rst,
+    *.yml,
+    *.pyc,
+    *.pyo,
+    *.egg-info,
+    __pycache__,
+    # Those are our third parties, do not lint them!
+    python/tank_vendor,
+    # Otherwise you'll have a lot of 'xxx' imported but unused
+    python/tank/__init__.py,
+    python/tank/*/__init__.py,
+    # Skip the auto-generated ui file.
+    python/tank/authentication/ui/login_dialog.py,
+    python/tank/authentication/ui/resources_rc.py,
+    python/tank/platform/qt/ui_busy_dialog.py,
+    python/tank/platform/qt/ui_item.py,
+    python/tank/platform/qt/ui_tank_dialog.py,
+    python/tank/authentication/sso_saml2/*,
+    tests/python
+
+# toolkit exceptions
+#
+# E203 whitespace before ':' (this is not PEP8 compliant)
+# E221 multiple spaces before operator
+# E261 two whitespaces before end of line comment.
+# E402 module level import not top of file
+# E501 line too long (112 > 79 characters)
+# W503 Line break occurred before a binary operator
+# N802 Variables should be lower case. (clashes with Qt naming conventions)
+# N806 Variables should be lower case. (clashes with Qt naming conventions)
+# E999 SyntaxError: invalid syntax (hack for hound CI which runs python 3.x)
+
+ignore = E203, E221, E261, E402, E501, W503, N802, N806, E999

.gitignore

@@ -31,3 +31,9 @@ pip-log.txt
 
 # Max OS X Desktop Services Store files
 .DS_Store
+
+# IDEs and Editors
+*.swo
+*.swp
+*.swm
+*~

engine.py

@@ -406,6 +406,15 @@ def post_app_init(self):
         else:
             self.post_app_init_nuke()
 
+        # Instantiate FlowHost if current context is configured with Flow
+        if self.context.flow_project_id:
+            # NOTE: placing this import at the top of the module causes errors
+            #       so it must be localized
+            from flowam.host import NukeHost
+
+            self.logger.info("Instantiating Flow host as NukeHost...")
+            self._flow_host = NukeHost(self.context)
+
     def post_app_init_studio(self):
         """
         The Nuke Studio specific portion of the engine's post-init process.

python/flowam/__init__.py

@@ -0,0 +1,13 @@
+# Copyright (c) 2015 Shotgun Software Inc.
+#
+# CONFIDENTIAL AND PROPRIETARY
+#
+# This work is provided "AS IS" and subject to the Shotgun Pipeline Toolkit
+# Source Code License included in this distribution package. See LICENSE.
+# By accessing, using, copying or modifying this work you indicate your
+# agreement to the Shotgun Pipeline Toolkit Source Code License. All rights
+# not expressly granted therein are reserved by Shotgun Software Inc.
+
+# flake8: noqa
+
+from . import host