Use Python stable ABI >= 3.5 (#1426)

.appveyor.yml

@@ -45,7 +45,6 @@ install:
 
 before_build:
   - cmd: git submodule update --init
-  - cmd: python scripts\compile_python_resources.py
 
 # Build config
 build_script:

scripts/compile_python_resources.py

@@ -1,10 +0,0 @@
-import compileall
-import os
-
-root = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
-compileall.compile_dir(os.path.join(root, 'src', 'python'), legacy=True, optimize=2)
-with open(os.path.join(root, 'src', 'resources.qrc'), 'r+b') as f:
-    data = f.read()
-    data = data.replace(b'.py<', b'.pyc<')
-    f.seek(0)
-    f.write(data)

src/Cutter.pro

@@ -100,7 +100,7 @@ CUTTER_ENABLE_PYTHON {
         PYTHON_EXECUTABLE = $$system("where python", lines)
         PYTHON_EXECUTABLE = $$first(PYTHON_EXECUTABLE)
         pythonpath = $$clean_path($$dirname(PYTHON_EXECUTABLE))
-        LIBS += -L$${pythonpath} -L$${pythonpath}/libs -lpython3
+        LIBS += -L$${pythonpath}/libs -lpython3
         INCLUDEPATH += $${pythonpath}/include
     }
 

src/common/PythonAPI.h

@@ -3,10 +3,10 @@
 
 #ifdef CUTTER_ENABLE_PYTHON
 
+#define Py_LIMITED_API 0x03050000
 #include <Python.h>
 
 PyObject *PyInit_api();
-PyObject *PyInit_api_internal();
 
 #endif
 

src/common/PythonManager.cpp

@@ -6,7 +6,6 @@
 #include "PythonManager.h"
 #include "Cutter.h"
 
-#include <marshal.h>
 #include <QDebug>
 #include <QFile>
 #include <QDebug>
@@ -103,11 +102,14 @@ static void pySideDestructionVisitor(SbkObject* pyObj, void* data)
 
     const char *reprStr = "";
     PyObject *repr = PyObject_Repr(reinterpret_cast<PyObject *>(pyObj));
+    PyObject *reprBytes;
     if (repr) {
-        reprStr = PyUnicode_AsUTF8(repr);
+        reprBytes = PyUnicode_AsUTF8String(repr);
+        reprStr = PyBytes_AsString(reprBytes);
     }
     qWarning() << "Warning: QObject from Python remaining (leaked from plugin?):" << reprStr;
     if (repr) {
+        Py_DecRef(reprBytes);
         Py_DecRef(repr);
     }
 
@@ -139,11 +141,11 @@ void PythonManager::shutdown()
     PySide::runCleanupFunctions();
 #endif
 
-    Py_Finalize();
-
     if (pythonHome) {
-        PyMem_RawFree(pythonHome);
+        PyMem_Free(pythonHome);
     }
+
+    Py_Finalize();
 }
 
 void PythonManager::addPythonPath(char *path) {

src/common/QtResImporter.cpp

@@ -1,53 +1,37 @@
 #ifdef CUTTER_ENABLE_PYTHON
 
+#define Py_LIMITED_API 0x03050000
 #include <Python.h>
-#include <marshal.h>
 
 #include "QtResImporter.h"
 
 #include <QFile>
 #include <QDebug>
 
-int QtResExists(const char *name, QFile &file)
+bool QtResExists(const char *name, QFile &file)
 {
     QString fname = QString::asprintf(":/python/%s.py", name);
     file.setFileName(fname);
-    if (file.exists())
-        return 1;
-    fname.append('c');
-    file.setFileName(fname);
-    if (file.exists())
-        return 2;
-    return 0;
+    return file.exists();
 }
 
 PyObject *QtResGetCode(const char *name)
 {
     QFile moduleFile;
-    bool isBytecode = false;
 
-    switch (QtResExists(name, moduleFile)) {
-    case 0:
+    if (!QtResExists(name, moduleFile)) {
         return nullptr;
-    case 2:
-        isBytecode = true;
     }
 
     moduleFile.open(QIODevice::ReadOnly);
     QByteArray data = moduleFile.readAll();
     moduleFile.close();
 
-    PyObject *codeObject;
-    if (isBytecode) {
-        codeObject = PyMarshal_ReadObjectFromString(data.constData() + 12,
-                                                    data.size() - 12);
-    } else {
-        codeObject = Py_CompileString(data.constData(),
+    PyObject *codeObject = Py_CompileString(data.constData(),
                                             moduleFile.fileName().toLocal8Bit().constData(),
                                             Py_file_input);
-    }
     if (!codeObject) {
-        qWarning() << "Couldn't unmarshal/compile " << moduleFile.fileName();
+        qWarning() << "Couldn't compile " << moduleFile.fileName();
     }
     return codeObject;
 }

src/meson.build

@@ -101,6 +101,7 @@ cpp = meson.get_compiler('cpp')
 if host_machine.system() == 'windows'
   add_project_arguments('-D_CRT_NONSTDC_NO_DEPRECATE', language: 'cpp')
   add_project_arguments('-D_CRT_SECURE_NO_WARNINGS', language: 'cpp')
+  add_project_link_arguments(join_paths(py3_exe.get_variable('BINDIR'), 'libs', 'python3.lib'), language: 'cpp')
 endif
 
 cutter_exe = executable(