cpython/PC/_findvs.cpp at pythoncapi · pythoncapi/cpython · GitHub

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// Helper library for location Visual Studio installations

// using the COM-based query API.

// Copyright (c) Microsoft Corporation

// Licensed to PSF under a contributor agreement

// Version history

// 2017-05: Initial contribution (Steve Dower)

#include <Windows.h>

#include <Strsafe.h>

#include "external\include\Setup.Configuration.h"

#include <Python.h>

static PyObject *error_from_hr(HRESULT hr)

{

if (FAILED(hr))

PyErr_Format(PyExc_OSError, "Error %08x", hr);

assert(PyErr_Occurred());

return nullptr;

}

static PyObject *get_install_name(ISetupInstance2 *inst)

{

HRESULT hr;

BSTR name;

PyObject *str = nullptr;

if (FAILED(hr = inst->GetDisplayName(LOCALE_USER_DEFAULT, &name)))

goto error;

str = PyUnicode_FromWideChar(name, SysStringLen(name));

SysFreeString(name);

return str;

error:

return error_from_hr(hr);

}

static PyObject *get_install_version(ISetupInstance *inst)

{

HRESULT hr;

BSTR ver;

PyObject *str = nullptr;

if (FAILED(hr = inst->GetInstallationVersion(&ver)))

goto error;

str = PyUnicode_FromWideChar(ver, SysStringLen(ver));

SysFreeString(ver);

return str;

error:

return error_from_hr(hr);

}

static PyObject *get_install_path(ISetupInstance *inst)

{

HRESULT hr;

BSTR path;

PyObject *str = nullptr;

if (FAILED(hr = inst->GetInstallationPath(&path)))

goto error;

str = PyUnicode_FromWideChar(path, SysStringLen(path));

SysFreeString(path);

return str;

error:

return error_from_hr(hr);

}

static PyObject *get_installed_packages(ISetupInstance2 *inst)

{

HRESULT hr;

PyObject *res = nullptr;

LPSAFEARRAY sa_packages = nullptr;

LONG ub = 0;

IUnknown **packages = nullptr;

PyObject *str = nullptr;

if (FAILED(hr = inst->GetPackages(&sa_packages)) ||

FAILED(hr = SafeArrayAccessData(sa_packages, (void**)&packages)) ||

FAILED(SafeArrayGetUBound(sa_packages, 1, &ub)) ||

!(res = PyList_New(0)))

goto error;

for (LONG i = 0; i < ub; ++i) {

ISetupPackageReference *package = nullptr;

BSTR id = nullptr;

PyObject *str = nullptr;

if (FAILED(hr = packages[i]->QueryInterface(&package)) ||

FAILED(hr = package->GetId(&id)))

goto iter_error;

str = PyUnicode_FromWideChar(id, SysStringLen(id));

SysFreeString(id);

if (!str || PyList_Append(res, str) < 0)

goto iter_error;

Py_CLEAR(str);

package->Release();

continue;

iter_error:

if (package) package->Release();

Py_XDECREF(str);

goto error;

}

SafeArrayUnaccessData(sa_packages);

SafeArrayDestroy(sa_packages);

return res;

error:

if (sa_packages && packages) SafeArrayUnaccessData(sa_packages);

if (sa_packages) SafeArrayDestroy(sa_packages);

Py_XDECREF(res);

return error_from_hr(hr);

}

static PyObject *find_all_instances()

{

ISetupConfiguration *sc = nullptr;

ISetupConfiguration2 *sc2 = nullptr;

IEnumSetupInstances *enm = nullptr;

ISetupInstance *inst = nullptr;

ISetupInstance2 *inst2 = nullptr;

PyObject *res = nullptr;

ULONG fetched;

HRESULT hr;

if (!(res = PyList_New(0)))

goto error;

if (FAILED(hr = CoCreateInstance(

__uuidof(SetupConfiguration),

NULL,

CLSCTX_INPROC_SERVER,

__uuidof(ISetupConfiguration),

(LPVOID*)&sc

)) && hr != REGDB_E_CLASSNOTREG)

goto error;

// If the class is not registered, there are no VS instances installed

if (hr == REGDB_E_CLASSNOTREG)

return res;

if (FAILED(hr = sc->QueryInterface(&sc2)) ||

FAILED(hr = sc2->EnumAllInstances(&enm)))

goto error;

while (SUCCEEDED(enm->Next(1, &inst, &fetched)) && fetched) {

PyObject *name = nullptr;

PyObject *version = nullptr;

PyObject *path = nullptr;

PyObject *packages = nullptr;

PyObject *tuple = nullptr;

if (FAILED(hr = inst->QueryInterface(&inst2)) ||

!(name = get_install_name(inst2)) ||

!(version = get_install_version(inst)) ||

!(path = get_install_path(inst)) ||

!(packages = get_installed_packages(inst2)) ||

!(tuple = PyTuple_Pack(4, name, version, path, packages)) ||

PyList_Append(res, tuple) < 0)

goto iter_error;

Py_DECREF(tuple);

Py_DECREF(packages);

Py_DECREF(path);

Py_DECREF(version);

Py_DECREF(name);

continue;

iter_error:

if (inst2) inst2->Release();

Py_XDECREF(tuple);

Py_XDECREF(packages);

Py_XDECREF(path);

Py_XDECREF(version);

Py_XDECREF(name);

goto error;

}

enm->Release();

sc2->Release();

sc->Release();

return res;

error:

if (enm) enm->Release();

if (sc2) sc2->Release();

if (sc) sc->Release();

Py_XDECREF(res);

return error_from_hr(hr);

}

PyDoc_STRVAR(findvs_findall_doc, "findall()\

Finds all installed versions of Visual Studio.\

This function will initialize COM temporarily. To avoid impact on other parts\

of your application, use a new thread to make this call.");

static PyObject *findvs_findall(PyObject *self, PyObject *args, PyObject *kwargs)

{

HRESULT hr = CoInitializeEx(nullptr, COINIT_MULTITHREADED);

if (hr == RPC_E_CHANGED_MODE)

hr = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);

if (FAILED(hr))

return error_from_hr(hr);

PyObject *res = find_all_instances();

CoUninitialize();

return res;

}

// List of functions to add to findvs in exec_findvs().

static PyMethodDef findvs_functions[] = {

{ "findall", (PyCFunction)findvs_findall, METH_VARARGS | METH_KEYWORDS, findvs_findall_doc },

{ NULL, NULL, 0, NULL }

};

// Initialize findvs. May be called multiple times, so avoid

// using static state.

static int exec_findvs(PyObject *module)

{

PyModule_AddFunctions(module, findvs_functions);

return 0; // success

}

PyDoc_STRVAR(findvs_doc, "The _distutils_findvs helper module");

static PyModuleDef_Slot findvs_slots[] = {

{ Py_mod_exec, exec_findvs },

{ 0, NULL }

};

static PyModuleDef findvs_def = {

PyModuleDef_HEAD_INIT,

"_distutils_findvs",

findvs_doc,

0, // m_size

NULL, // m_methods

findvs_slots,

NULL, // m_traverse

NULL, // m_clear

NULL, // m_free

};

extern "C" {

PyMODINIT_FUNC PyInit__distutils_findvs(void)

{

return PyModuleDef_Init(&findvs_def);

}

cpython/PC/_findvs.cpp at pythoncapi · pythoncapi/cpython · GitHub

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