Add WIP PythonEngine.

src/PythonEngine.cpp

@@ -0,0 +1,59 @@
+#include "ScriptEngine.hpp"
+#include <Python.h>
+
+
+extern rack::Plugin* pluginInstance;
+
+
+struct PythonEngine : ScriptEngine {
+	PyInterpreterState* interp = NULL;
+
+	~PythonEngine() {
+		if (interp)
+			PyInterpreterState_Delete(interp);
+	}
+
+	std::string getEngineName() override {
+		return "Python";
+	}
+
+	int run(const std::string& path, const std::string& script) override {
+		// Initialize Python
+		if (!Py_IsInitialized()) {
+			std::string pythonPath = rack::asset::plugin(pluginInstance, "dep/lib/python3.7");
+			wchar_t* pythonPathW = Py_DecodeLocale(pythonPath.c_str(), NULL);
+			Py_SetPath(pythonPathW);
+			PyMem_RawFree(pythonPathW);
+			Py_InitializeEx(0);
+
+			PyEval_InitThreads();
+		}
+		if (!Py_IsInitialized()) {
+			return -1;
+		}
+
+		PyThreadState* tstate = PyThreadState_Get();
+		interp = PyInterpreterState_New();
+		PyThreadState_Swap(tstate);
+
+		if (PyRun_SimpleString(script.c_str())) {
+			return -1;
+		}
+
+		// rack::DEBUG("4");
+		return 0;
+	}
+
+	int process() override {
+		PyThreadState* tstate = PyThreadState_New(interp);
+		PyEval_RestoreThread(tstate);
+		PyThreadState_Clear(tstate);
+		PyThreadState_DeleteCurrent();
+		return 0;
+	}
+};
+
+
+ScriptEngine* createPythonEngine() {
+	return new PythonEngine;
+}

tests/hello.py

@@ -0,0 +1,2 @@
+
+print("Hello, world!")