added harmony prelaunch

pype/hooks/harmony/pre_launch_args.py

@@ -0,0 +1,53 @@
+import os
+import platform
+
+from pype.lib import PreLaunchHook
+
+
+class HarmonyPrelaunchHook(PreLaunchHook):
+    """Launch arguments preparation.
+
+    Hook add python executable and execute python script of harmony
+    implementation before harmony executable.
+    """
+    hosts = ["harmony"]
+
+    def execute(self):
+        # Pop tvpaint executable
+        photoshop_executable = self.launch_context.launch_args.pop(0)
+
+        # Pop rest of launch arguments - There should not be other arguments!
+        remainders = []
+        while self.launch_context.launch_args:
+            remainders.append(self.launch_context.launch_args.pop(0))
+
+        python_launch_args = [
+            self.python_executable(),
+            "-c",
+            (
+                "^\"import avalon.harmony;"
+                "avalon.harmony.launch(\"{}\")^\"\""
+            ).format(photoshop_executable)
+        ]
+        if platform.system().lower() != "windows":
+            new_launch_args = python_launch_args
+        else:
+            new_launch_args = [
+                "cmd.exe",
+                "/k",
+                "\"{}\"".format(" ".join(python_launch_args))
+            ]
+
+        # Append as whole list as these areguments should not be separated
+        self.launch_context.launch_args.append(new_launch_args)
+
+        if remainders:
+            self.log.warning((
+                "There are unexpected launch arguments in Harmony launch. {}"
+            ).format(str(remainders)))
+            self.launch_context.launch_args.extend(remainders)
+
+    def python_executable(self):
+        """Should lead to python executable."""
+        # TODO change in Pype 3
+        return os.environ["PYPE_PYTHON_EXE"]