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@zooba @vstinner
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/* Main program when embedded in a UWP application on Windows */
#include "Python.h"
#include <string.h>
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#include <shellapi.h>
#include <shlobj.h>
#include <string>
#include <winrt\Windows.ApplicationModel.h>
#include <winrt\Windows.Storage.h>
#ifdef PYTHONW
#ifdef _DEBUG
const wchar_t *PROGNAME = L"pythonw_d.exe";
#else
const wchar_t *PROGNAME = L"pythonw.exe";
#endif
#else
#ifdef _DEBUG
const wchar_t *PROGNAME = L"python_d.exe";
#else
const wchar_t *PROGNAME = L"python.exe";
#endif
#endif
static std::wstring
get_user_base()
{
try {
const auto appData = winrt::Windows::Storage::ApplicationData::Current();
if (appData) {
const auto localCache = appData.LocalCacheFolder();
if (localCache) {
auto path = localCache.Path();
if (!path.empty()) {
return std::wstring(path) + L"\\local-packages";
}
}
}
} catch (...) {
}
return std::wstring();
}
static std::wstring
get_package_family()
{
try {
const auto package = winrt::Windows::ApplicationModel::Package::Current();
if (package) {
const auto id = package.Id();
if (id) {
return std::wstring(id.FamilyName());
}
}
}
catch (...) {
}
return std::wstring();
}
static std::wstring
get_package_home()
{
try {
const auto package = winrt::Windows::ApplicationModel::Package::Current();
if (package) {
const auto path = package.InstalledLocation();
if (path) {
return std::wstring(path.Path());
}
}
}
catch (...) {
}
return std::wstring();
}
static PyStatus
set_process_name(PyConfig *config)
{
PyStatus status = PyStatus_Ok();
std::wstring executable;
const auto home = get_package_home();
const auto family = get_package_family();
if (!family.empty()) {
PWSTR localAppData;
if (SUCCEEDED(SHGetKnownFolderPath(FOLDERID_LocalAppData, 0,
NULL, &localAppData))) {
executable = std::wstring(localAppData)
+ L"\\Microsoft\\WindowsApps\\"
+ family
+ L"\\"
+ PROGNAME;
CoTaskMemFree(localAppData);
}
}
/* Only use module filename if we don't have a home */
if (home.empty() && executable.empty()) {
executable.resize(MAX_PATH);
while (true) {
DWORD len = GetModuleFileNameW(
NULL, executable.data(), (DWORD)executable.size());
if (len == 0) {
executable.clear();
break;
} else if (len == executable.size() &&
GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
executable.resize(len * 2);
} else {
executable.resize(len);
break;
}
}
size_t i = executable.find_last_of(L"/\\");
if (i == std::wstring::npos) {
executable = PROGNAME;
} else {
executable.replace(i + 1, std::wstring::npos, PROGNAME);
}
}
if (!home.empty()) {
status = PyConfig_SetString(config, &config->home, home.c_str());
if (PyStatus_Exception(status)) {
return status;
}
}
const wchar_t *launcherPath = _wgetenv(L"__PYVENV_LAUNCHER__");
if (launcherPath) {
if (!executable.empty()) {
status = PyConfig_SetString(config, &config->base_executable,
executable.c_str());
if (PyStatus_Exception(status)) {
return status;
}
}
status = PyConfig_SetString(
config, &config->executable, launcherPath);
/* bpo-35873: Clear the environment variable to avoid it being
* inherited by child processes. */
_wputenv_s(L"__PYVENV_LAUNCHER__", L"");
} else if (!executable.empty()) {
status = PyConfig_SetString(
config, &config->executable, executable.c_str());
}
return status;
}
int
wmain(int argc, wchar_t **argv)
{
PyStatus status;
PyPreConfig preconfig;
PyConfig config;
const wchar_t *moduleName = NULL;
const wchar_t *p = wcsrchr(argv[0], L'\\');
if (!p) {
p = argv[0];
}
if (p) {
if (*p == L'\\') {
p++;
}
if (wcsnicmp(p, L"pip", 3) == 0) {
moduleName = L"pip";
} else if (wcsnicmp(p, L"idle", 4) == 0) {
moduleName = L"idlelib";
}
}
PyPreConfig_InitPythonConfig(&preconfig);
if (!moduleName) {
status = Py_PreInitializeFromArgs(&preconfig, argc, argv);
if (PyStatus_Exception(status)) {
goto fail_without_config;
}
}
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
goto fail_without_config;
}
status = PyConfig_SetArgv(&config, argc, argv);
if (PyStatus_Exception(status)) {
goto fail;
}
if (moduleName) {
config.parse_argv = 0;
}
status = set_process_name(&config);
if (PyStatus_Exception(status)) {
goto fail;
}
p = _wgetenv(L"PYTHONUSERBASE");
if (!p || !*p) {
_wputenv_s(L"PYTHONUSERBASE", get_user_base().c_str());
}
if (moduleName) {
status = PyConfig_SetString(&config, &config.run_module, moduleName);
if (PyStatus_Exception(status)) {
goto fail;
}
status = PyConfig_SetString(&config, &config.run_filename, NULL);
if (PyStatus_Exception(status)) {
goto fail;
}
status = PyConfig_SetString(&config, &config.run_command, NULL);
if (PyStatus_Exception(status)) {
goto fail;
}
}
status = Py_InitializeFromConfig(&config);
if (PyStatus_Exception(status)) {
goto fail;
}
PyConfig_Clear(&config);
return Py_RunMain();
fail:
PyConfig_Clear(&config);
fail_without_config:
if (PyStatus_IsExit(status)) {
return status.exitcode;
}
assert(PyStatus_Exception(status));
Py_ExitStatusException(status);
/* Unreachable code */
return 0;
}
#ifdef PYTHONW
int WINAPI wWinMain(
HINSTANCE hInstance, /* handle to current instance */
HINSTANCE hPrevInstance, /* handle to previous instance */
LPWSTR lpCmdLine, /* pointer to command line */
int nCmdShow /* show state of window */
)
{
return wmain(__argc, __wargv);
}
#endif
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