prepend python2 vendor for hiero and nuke

pype/hooks/global/pre_python2_vendor.py

@@ -0,0 +1,36 @@
+import os
+from pype.lib import PreLaunchHook
+
+
+class PrePython2Vendor(PreLaunchHook):
+    """Prepend python 2 dependencies for py2 hosts."""
+    # WARNING This hook will probably be deprecated in Pype 3 - kept for test
+    order = 10
+    app_groups = ["hiero", "nuke"]
+
+    def execute(self):
+        # Prepare vendor dir path
+        self.log.info(
+                f"adding global python 2 vendor"
+        )
+        PYPE_ROOT = os.getenv("PYPE_ROOT")
+        python_2_vendor = os.path.join(
+            PYPE_ROOT,
+            "pype",
+            "vendor",
+            "python",
+            "python_2"
+        )
+
+        # Add Python 2 modules
+        python_paths = [
+            python_2_vendor
+        ]
+
+        # Load PYTHONPATH from current launch context
+        python_path = self.launch_context.env.get("PYTHONPATH")
+        if python_path:
+            python_paths.append(python_path)
+
+        # Set new PYTHONPATH to launch context environments
+        self.launch_context.env["PYTHONPATH"] = os.pathsep.join(python_paths)