From 99be1cbeb3b58f0daa9108abc4075412d6212169 Mon Sep 17 00:00:00 2001
From: Steve Dower <steve.dower@python.org>
Date: Wed, 15 Jun 2022 17:07:55 +0100
Subject: [PATCH] gh-93824: Reenable installation of shell extension on Windows
 ARM64 (GH-93825)

---
 .../2022-06-15-01-03-52.gh-issue-93824.mR4mxu.rst   |  2 ++
 Tools/msi/bundle/packagegroups/launcher.wxs         | 12 ++++++++++--
 Tools/msi/launcher/launcher.wxs                     | 13 +++++++++----
 Tools/msi/launcher/launcher_files.wxs               | 13 +++++--------
 4 files changed, 26 insertions(+), 14 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Windows/2022-06-15-01-03-52.gh-issue-93824.mR4mxu.rst

diff --git a/Misc/NEWS.d/next/Windows/2022-06-15-01-03-52.gh-issue-93824.mR4mxu.rst b/Misc/NEWS.d/next/Windows/2022-06-15-01-03-52.gh-issue-93824.mR4mxu.rst
new file mode 100644
index 00000000000000..cabe983847c891
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2022-06-15-01-03-52.gh-issue-93824.mR4mxu.rst
@@ -0,0 +1,2 @@
+Drag and drop of files onto Python files in Windows Explorer has been
+enabled for Windows ARM64.
diff --git a/Tools/msi/bundle/packagegroups/launcher.wxs b/Tools/msi/bundle/packagegroups/launcher.wxs
index 7dae8ca7a68c18..a6922758f31f14 100644
--- a/Tools/msi/bundle/packagegroups/launcher.wxs
+++ b/Tools/msi/bundle/packagegroups/launcher.wxs
@@ -11,7 +11,11 @@
                         EnableFeatureSelection="yes"
                         Permanent="yes"
                         Visible="yes"
-                        InstallCondition="(InstallAllUsers or InstallLauncherAllUsers) and Include_launcher and not DetectedLauncher" />
+                        InstallCondition="(InstallAllUsers or InstallLauncherAllUsers) and Include_launcher and not DetectedLauncher">
+                <?if $(var.Platform)~="ARM64" ?>
+                <MsiProperty Name="ARM64_SHELLEXT" Value="1" />
+                <?endif ?>
+            </MsiPackage>
 
             <MsiPackage Id="launcher_JustForMe"
                         SourceFile="!(bindpath.build32)en-us\launcher.msi"
@@ -21,7 +25,11 @@
                         EnableFeatureSelection="yes"
                         Permanent="yes"
                         Visible="yes"
-                        InstallCondition="not (InstallAllUsers or InstallLauncherAllUsers) and Include_launcher and not DetectedLauncher" />
+                        InstallCondition="not (InstallAllUsers or InstallLauncherAllUsers) and Include_launcher and not DetectedLauncher">
+                <?if $(var.Platform)~="ARM64" ?>
+                <MsiProperty Name="ARM64_SHELLEXT" Value="1" />
+                <?endif ?>
+            </MsiPackage>
         </PackageGroup>
     </Fragment>
 </Wix>
\ No newline at end of file
diff --git a/Tools/msi/launcher/launcher.wxs b/Tools/msi/launcher/launcher.wxs
index d001fe53ea3811..b83058c63bf6d9 100644
--- a/Tools/msi/launcher/launcher.wxs
+++ b/Tools/msi/launcher/launcher.wxs
@@ -3,13 +3,18 @@
     <Product Id="*" Language="!(loc.LCID)" Name="!(loc.Title)" Version="$(var.Version)" Manufacturer="!(loc.Manufacturer)" UpgradeCode="$(var.UpgradeCode)">
         <Package InstallerVersion="500" Compressed="yes" InstallScope="perUser" />
         <MediaTemplate EmbedCab="yes" CompressionLevel="high" />
-        
+
         <Property Id="Suppress_TARGETDIR_Check" Value="1" />
         <Icon Id="ARPIcon" SourceFile="!(bindpath.src)PC\icons\launcher.ico" />
         <Property Id="ARPPRODUCTICON" Value="ARPIcon" />
         <Property Id="ARPNOMODIFY" Value="1" />
         <Property Id="DISABLEADVTSHORTCUTS" Value="1" />
 
+        <Property Id="ARM64_SHELLEXT">
+            <ComponentSearch Id="RegistrySearch_ARM64_SHELLEXT_Detected"
+                             Guid="{C591963D-7FC6-4FCE-8642-5E01E6B8848F}" />
+        </Property>
+
         <Feature Id="DefaultFeature" AllowAdvertise="no" Title="!(loc.Title)" Description="!(loc.Description)">
             <ComponentGroupRef Id="launcher_exe" Primary="yes" />
         </Feature>
@@ -17,14 +22,14 @@
             <ComponentGroupRef Id="launcher_exe" />
             <ComponentGroupRef Id="launcher_reg" />
         </Feature>
-        
+
         <Directory Id="TARGETDIR" Name="SourceDir">
             <Directory Id="LauncherInstallDirectory" />
         </Directory>
-        
+
         <CustomAction Id="SetLauncherInstallDirectoryLM" Property="LauncherInstallDirectory" Value="[WindowsFolder]" />
         <CustomAction Id="SetLauncherInstallDirectoryCU" Property="LauncherInstallDirectory" Value="[LocalAppDataFolder]Programs\Python\Launcher" />
-        
+
         <InstallExecuteSequence>
             <Custom Before="SetLauncherInstallDirectoryLM" Action="SetLauncherInstallDirectoryCU">NOT Installed AND NOT ALLUSERS=1</Custom>
             <Custom Before="CostFinalize" Action="SetLauncherInstallDirectoryLM">NOT Installed AND ALLUSERS=1</Custom>
diff --git a/Tools/msi/launcher/launcher_files.wxs b/Tools/msi/launcher/launcher_files.wxs
index 2c6c808137a6ff..d9a230e2d35ace 100644
--- a/Tools/msi/launcher/launcher_files.wxs
+++ b/Tools/msi/launcher/launcher_files.wxs
@@ -22,26 +22,23 @@
             </Component>
 
             <Component Id="pyshellext_amd64.dll" Directory="LauncherInstallDirectory" Guid="{E7411EFD-F1DD-40EB-B0C7-4BA02BF3E75F}" Win64="yes">
-                <Condition>VersionNT64</Condition>
+                <Condition>VersionNT64 AND NOT ARM64_SHELLEXT</Condition>
                 <File Id="pyshellext_amd64.dll" Name="pyshellext.amd64.dll" Source="!(bindpath.Build64)\pyshellext.dll">
                     <Class Id="{BEA218D2-6950-497B-9434-61683EC065FE}" Advertise="no" Context="InprocServer32" ThreadingModel="apartment" />
                 </File>
             </Component>
             <Component Id="pyshellext_win32.dll" Directory="LauncherInstallDirectory" Guid="{C5936696-9A5A-45A0-A830-D172C3329282}">
-                <Condition>NOT VersionNT64</Condition>
+                <Condition>NOT VersionNT64 AND NOT ARM64_SHELLEXT</Condition>
                 <File Id="pyshellext_win32.dll" Name="pyshellext.win32.dll" Source="!(bindpath.Build32)\pyshellext.dll">
                     <Class Id="{BEA218D2-6950-497B-9434-61683EC065FE}" Advertise="no" Context="InprocServer32" ThreadingModel="apartment" />
                 </File>
             </Component>
-            <!--
-            Currently unclear how to detect ARM64 device at this point.
-            In any case, the shell extension doesn't appear to work, so installing a non-functional
-            pyshellext_amd64.dll for a different platform isn't any worse.
-            <Component Id="pyshellext_arm64.dll" Directory="LauncherInstallDirectory" Guid="{C591963D-7FC6-4FCE-8642-5E01E6B8848F}">
+            <Component Id="pyshellext_arm64.dll" Directory="LauncherInstallDirectory" Guid="{C591963D-7FC6-4FCE-8642-5E01E6B8848F}" Win64="yes">
+                <Condition>ARM64_SHELLEXT</Condition>
                 <File Id="pyshellext_arm64.dll" Name="pyshellext.arm64.dll" Source="!(bindpath.BuildARM64)\pyshellext.dll">
                     <Class Id="{BEA218D2-6950-497B-9434-61683EC065FE}" Advertise="no" Context="InprocServer32" ThreadingModel="apartment" />
                 </File>
-            </Component>-->
+            </Component>
         </ComponentGroup>
     </Fragment>
 </Wix>