From 6b68ed11cfef9a4755e4be2bee705a9e8de9002e Mon Sep 17 00:00:00 2001
From: Steve Dower <steve.dower@python.org>
Date: Tue, 8 Nov 2022 20:43:41 +0000
Subject: [PATCH 1/3] Change to more performant functions for UWP launcher

---
 PC/python_uwp.cpp | 89 ++++++++++++++++++++++++++++++++++-------------
 1 file changed, 65 insertions(+), 24 deletions(-)

diff --git a/PC/python_uwp.cpp b/PC/python_uwp.cpp
index 88369e8fbfeb38..9ced3b04fd1c2a 100644
--- a/PC/python_uwp.cpp
+++ b/PC/python_uwp.cpp
@@ -10,6 +10,7 @@
 
 #include <string>
 
+#include <appmodel.h>
 #include <winrt\Windows.ApplicationModel.h>
 #include <winrt\Windows.Storage.h>
 
@@ -27,15 +28,61 @@ 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) {
-                auto path = localCache.Path();
+                path = localCache.Path();
                 if (!path.empty()) {
                     return std::wstring(path) + L"\\local-packages";
                 }
@@ -43,23 +90,6 @@ get_user_base()
         }
     } 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();
 }
@@ -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 (...) {
     }

From edc732ee79dc404244e901f680b4f93262ab53a2 Mon Sep 17 00:00:00 2001
From: Steve Dower <steve.dower@python.org>
Date: Thu, 10 Nov 2022 20:53:32 +0000
Subject: [PATCH 2/3] Remove bad optimisation

---
 PC/python_uwp.cpp | 21 ++-------------------
 1 file changed, 2 insertions(+), 19 deletions(-)

diff --git a/PC/python_uwp.cpp b/PC/python_uwp.cpp
index 9ced3b04fd1c2a..2beea60e5af1ef 100644
--- a/PC/python_uwp.cpp
+++ b/PC/python_uwp.cpp
@@ -60,31 +60,14 @@ get_package_family()
 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) {
-                path = localCache.Path();
+                std::wstring path { localCache.Path().c_str() };
                 if (!path.empty()) {
-                    return std::wstring(path) + L"\\local-packages";
+                    return path + L"\\local-packages";
                 }
             }
         }

From e129378fcb8724ca91350c07150c4dbdc558adce Mon Sep 17 00:00:00 2001
From: Steve Dower <steve.dower@python.org>
Date: Wed, 23 Nov 2022 17:17:22 +0000
Subject: [PATCH 3/3] NEWS

---
 .../next/Windows/2022-11-23-17-17-16.gh-issue-99345.jOa3-f.rst  | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Windows/2022-11-23-17-17-16.gh-issue-99345.jOa3-f.rst

diff --git a/Misc/NEWS.d/next/Windows/2022-11-23-17-17-16.gh-issue-99345.jOa3-f.rst b/Misc/NEWS.d/next/Windows/2022-11-23-17-17-16.gh-issue-99345.jOa3-f.rst
new file mode 100644
index 00000000000000..99db0c55a67eed
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2022-11-23-17-17-16.gh-issue-99345.jOa3-f.rst
@@ -0,0 +1,2 @@
+Use faster initialization functions to detect install location for Windows
+Store package

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