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Use faster APIs to calculate paths at startup for Store packaged Python on Windows#99345

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Merged
zooba merged 4 commits intopython:mainfromzooba:faststart
Nov 23, 2022
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Change to more performant functions for UWP launcher
  • Loading branch information
@zooba
zooba committedNov 10, 2022
commit6b68ed11cfef9a4755e4be2bee705a9e8de9002e
89 changes: 65 additions & 24 deletionsPC/python_uwp.cpp
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Original file line numberDiff line numberDiff line change
Expand Up@@ -10,6 +10,7 @@

#include <string>

#include <appmodel.h>
#include <winrt\Windows.ApplicationModel.h>
#include <winrt\Windows.Storage.h>

Expand All@@ -27,39 +28,68 @@ const wchar_t *PROGNAME = L"python.exe";
#endif
#endif

static std::wstring
get_package_family()
{
try {
UINT32 nameLength = MAX_PATH;
std::wstring name;
name.resize(nameLength);
DWORD rc = GetCurrentPackageFamilyName(&nameLength, name.data());
if (rc == ERROR_SUCCESS) {
name.resize(nameLength - 1);
return name;
}
else if (rc != ERROR_INSUFFICIENT_BUFFER) {
throw rc;
}
name.resize(nameLength);
rc = GetCurrentPackageFamilyName(&nameLength, name.data());
if (rc != ERROR_SUCCESS) {
throw rc;
}
name.resize(nameLength - 1);
return name;
}
catch (...) {
}

return std::wstring();
}

static std::wstring
get_user_base()
{
const auto family = get_package_family();
std::wstring path;

if (!family.empty()) {
PWSTR localAppData;
if (SUCCEEDED(SHGetKnownFolderPath(FOLDERID_LocalAppData, 0,
NULL, &localAppData))) {
path = std::wstring(localAppData)
+ L"\\Packages\\"
+ family
+ L"\\LocalCache\\local-packages";

CoTaskMemFree(localAppData);
return path;
}
}

try {
const auto appData = winrt::Windows::Storage::ApplicationData::Current();
if (appData) {
const auto localCache = appData.LocalCacheFolder();
if (localCache) {
autopath = localCache.Path();
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();
}
Expand All@@ -68,13 +98,24 @@ 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());
}
UINT32 pathLength = MAX_PATH;
std::wstring path;
path.resize(pathLength);
DWORD rc = GetCurrentPackagePath(&pathLength, path.data());
if (rc == ERROR_SUCCESS) {
path.resize(pathLength - 1);
return path;
}
else if (rc != ERROR_INSUFFICIENT_BUFFER) {
throw rc;
}
path.resize(pathLength);
rc = GetCurrentPackagePath(&pathLength, path.data());
if (rc != ERROR_SUCCESS) {
throw rc;
}
path.resize(pathLength - 1);
return path;
}
catch (...) {
}
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