Issue #24585: Enables build-to-build upgrades that preserve settings.

Rather than using Burn "Persisted" variables we now add registry keys for each added feature. These can be detected by the installer regardless of which version installed them, and we use this for Modify and Upgrade. In particular, Upgrades can't access the Persisted variables, but can find well-known registry keys.
There are also some changes to the bootstrap app to properly handle upgrades.
Finally, a few minor improvements to the Windows build to keep things tidier.

PCbuild/build.bat

@@ -25,16 +25,17 @@ set verbose=/nologo /v:m
 set kill=
 
 :CheckOpts
-if '%1'=='-c' (set conf=%2) & shift & shift & goto CheckOpts
-if '%1'=='-p' (set platf=%2) & shift & shift & goto CheckOpts
-if '%1'=='-r' (set target=Rebuild) & shift & goto CheckOpts
-if '%1'=='-t' (set target=%2) & shift & shift & goto CheckOpts
-if '%1'=='-d' (set conf=Debug) & shift & goto CheckOpts
-if '%1'=='-e' call "%dir%get_externals.bat" & shift & goto CheckOpts
-if '%1'=='-m' (set parallel=/m) & shift & goto CheckOpts
-if '%1'=='-M' (set parallel=) & shift & goto CheckOpts
-if '%1'=='-v' (set verbose=/v:n) & shift & goto CheckOpts
-if '%1'=='-k' (set kill=true) & shift & goto CheckOpts
+if '%~1'=='-c' (set conf=%2) & shift & shift & goto CheckOpts
+if '%~1'=='-p' (set platf=%2) & shift & shift & goto CheckOpts
+if '%~1'=='-r' (set target=Rebuild) & shift & goto CheckOpts
+if '%~1'=='-t' (set target=%2) & shift & shift & goto CheckOpts
+if '%~1'=='-d' (set conf=Debug) & shift & goto CheckOpts
+if '%~1'=='-e' call "%dir%get_externals.bat" & shift & goto CheckOpts
+if '%~1'=='-m' (set parallel=/m) & shift & goto CheckOpts
+if '%~1'=='-M' (set parallel=) & shift & goto CheckOpts
+if '%~1'=='-v' (set verbose=/v:n) & shift & goto CheckOpts
+if '%~1'=='-k' (set kill=true) & shift & goto CheckOpts
+if '%~1'=='-V' shift & goto Version
 
 if '%platf%'=='x64' (set vs_platf=x86_amd64)
 
@@ -50,3 +51,9 @@ rem Passing %1-9 is not the preferred option, but argument parsing in
 rem batch is, shall we say, "lackluster"
 echo on
 msbuild "%dir%pcbuild.proj" /t:%target% %parallel% %verbose% /p:Configuration=%conf% /p:Platform=%platf% %1 %2 %3 %4 %5 %6 %7 %8 %9
+
+@goto :eof
+
+:Version
+rem Display the current build version information
+msbuild "%dir%python.props" /t:ShowVersionInfo /v:m /nologo %1 %2 %3 %4 %5 %6 %7 %8 %9

PCbuild/python.props

@@ -42,7 +42,9 @@
     
     <!-- Full path of the resulting python.exe binary -->
     <PythonExe Condition="'$(PythonExe)' == ''">$(BuildPath)python$(PyDebugExt).exe</PythonExe>
-
+  </PropertyGroup>
+  
+  <PropertyGroup Condition="'$(OverrideVersion)' == ''">
     <!--
     Read version information from Include\patchlevel.h. The following properties are set:
     
@@ -70,7 +72,40 @@
     <ReleaseLevelName Condition="$(_ReleaseLevel) == 'ALPHA'">a$(ReleaseSerial)</ReleaseLevelName>
     <ReleaseLevelName Condition="$(_ReleaseLevel) == 'BETA'">b$(ReleaseSerial)</ReleaseLevelName>
     <ReleaseLevelName Condition="$(_ReleaseLevel) == 'GAMMA'">rc$(ReleaseSerial)</ReleaseLevelName>
+  </PropertyGroup>
+  
+  <PropertyGroup Condition="'$(OverrideVersion)' != ''">
+    <!--
+    Override the version number when building by specifying OverrideVersion.
+    For example:
+    
+        PCBuild\build.bat "/p:OverrideVersion=3.5.2a1"
     
+    Use the -V option to check your version is valid:
+    
+        PCBuild\build.bat -V "/p:OverrideVersion=3.5.2a1"
+          PythonVersionNumber: 3.5.2
+          PythonVersion:       3.5.2a1
+          PythonVersionHex:    0x030502A1
+          Field3Value:         2101
+    
+    Note that this only affects the version numbers embedded in resources and
+    installers, but not sys.version.
+    -->
+    <MajorVersionNumber>$([System.Text.RegularExpressions.Regex]::Match($(OverrideVersion), `(\d+)\.(\d+)\.(\d+)((a|b|rc)(\d))?`).Groups[1].Value)</MajorVersionNumber>
+    <MinorVersionNumber>$([System.Text.RegularExpressions.Regex]::Match($(OverrideVersion), `(\d+)\.(\d+)\.(\d+)((a|b|rc)(\d))?`).Groups[2].Value)</MinorVersionNumber>
+    <MicroVersionNumber>$([System.Text.RegularExpressions.Regex]::Match($(OverrideVersion), `(\d+)\.(\d+)\.(\d+)((a|b|rc)(\d))?`).Groups[3].Value)</MicroVersionNumber>
+    <ReleaseLevelName>$([System.Text.RegularExpressions.Regex]::Match($(OverrideVersion), `(\d+)\.(\d+)\.(\d+)((a|b|rc)(\d))?`).Groups[4].Value)</ReleaseLevelName>
+    <_ReleaseLevel>$([System.Text.RegularExpressions.Regex]::Match($(OverrideVersion), `(\d+)\.(\d+)\.(\d+)((a|b|rc)(\d))?`).Groups[5].Value)</_ReleaseLevel>
+    <ReleaseSerial>$([System.Text.RegularExpressions.Regex]::Match($(OverrideVersion), `(\d+)\.(\d+)\.(\d+)((a|b|rc)(\d))?`).Groups[6].Value)</ReleaseSerial>
+    <ReleaseSerial Condition="'$(ReleaseSerial)' == ''">0</ReleaseSerial>
+    <ReleaseLevelNumber>15</ReleaseLevelNumber>
+    <ReleaseLevelNumber Condition="$(_ReleaseLevel) == 'a'">10</ReleaseLevelNumber>
+    <ReleaseLevelNumber Condition="$(_ReleaseLevel) == 'b'">11</ReleaseLevelNumber>
+    <ReleaseLevelNumber Condition="$(_ReleaseLevel) == 'rc'">12</ReleaseLevelNumber>
+  </PropertyGroup>
+  
+  <PropertyGroup>
     <PythonVersionNumber>$(MajorVersionNumber).$(MinorVersionNumber).$(MicroVersionNumber)</PythonVersionNumber>
     <PythonVersion>$(MajorVersionNumber).$(MinorVersionNumber).$(MicroVersionNumber)$(ReleaseLevelName)</PythonVersion>
     <PythonVersionHex>$([msbuild]::BitwiseOr(
@@ -110,7 +145,7 @@
   <Target Name="ShowVersionInfo">
     <Message Importance="high" Text="PythonVersionNumber: $(PythonVersionNumber)" />
     <Message Importance="high" Text="PythonVersion:       $(PythonVersion)" />
-    <Message Importance="high" Text="$([System.String]::Format(`PythonVersionHex:    0x{0:x}`, $([System.UInt32]::Parse($(PythonVersionHex)))))" />
+    <Message Importance="high" Text="PythonVersionHex:    0x$([System.UInt32]::Parse($(PythonVersionHex)).ToString(`X08`))" />
     <Message Importance="high" Text="Field3Value:         $(Field3Value)" />
   </Target>
 </Project>

Tools/msi/build.bat

@@ -8,10 +8,10 @@ set BUILDX64=
 set BUILDDOC=
 
 :CheckOpts
-if "%1" EQU "-h" goto Help
-if "%1" EQU "-x86" (set BUILDX86=1) && shift && goto CheckOpts
-if "%1" EQU "-x64" (set BUILDX64=1) && shift && goto CheckOpts
-if "%1" EQU "--doc" (set BUILDDOC=1) && shift && goto CheckOpts
+if "%~1" EQU "-h" goto Help
+if "%~1" EQU "-x86" (set BUILDX86=1) && shift && goto CheckOpts
+if "%~1" EQU "-x64" (set BUILDX64=1) && shift && goto CheckOpts
+if "%~1" EQU "--doc" (set BUILDDOC=1) && shift && goto CheckOpts
 
 if not defined BUILDX86 if not defined BUILDX64 (set BUILDX86=1) && (set BUILDX64=1)
 

Tools/msi/bundle/Default.thm

@@ -21,13 +21,24 @@
 
         <Text X="185" Y="50" Width="-11" Height="50" FontId="3" TabStop="yes">#(loc.InstallMessage)</Text>
 
-        <Button Name="InstallJustForMeButton" X="175" Y="101" Width="-11" Height="129" TabStop="yes" FontId="3" HexStyle="0xE">#(loc.InstallJustForMeButton)</Button>
+        <Button Name="InstallButton" X="175" Y="101" Width="-11" Height="129" TabStop="yes" FontId="3" HexStyle="0xE">#(loc.InstallButton)</Button>
         <Button Name="InstallCustomButton" X="175" Y="241" Width="-11" Height="59" TabStop="yes" FontId="3" HexStyle="0xE">#(loc.InstallCustomButton)</Button>
 
         <Checkbox Name="PrependPath" X="185" Y="-13" Width="-100" Height="20" TabStop="yes" FontId="3">#(loc.ShortPrependPathLabel)</Checkbox>
 
         <Button Name="InstallCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.CancelButton)</Button>
     </Page>
+    <Page Name="Upgrade">
+        <Text X="185" Y="11" Width="-11" Height="32" FontId="1" DisablePrefix="yes">#(loc.InstallUpgradeHeader)</Text>
+        <Image X="0" Y="0" Width="162" Height="352" ImageFile="SideBar.png"/>
+
+        <Text X="185" Y="50" Width="-11" Height="50" FontId="3" TabStop="yes">#(loc.InstallUpgradeMessage)</Text>
+
+        <Button Name="InstallUpgradeButton" X="175" Y="101" Width="-11" Height="129" TabStop="yes" FontId="3" HexStyle="0xE">#(loc.InstallUpgradeButton)</Button>
+        <Button Name="InstallUpgradeCustomButton" X="175" Y="241" Width="-11" Height="59" TabStop="yes" FontId="3" HexStyle="0xE">#(loc.InstallUpgradeCustomButton)</Button>
+
+        <Button Name="InstallCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.CancelButton)</Button>
+    </Page>
     <Page Name="SimpleInstall">
         <Text X="185" Y="11" Width="-11" Height="32" FontId="1" DisablePrefix="yes">#(loc.InstallHeader)</Text>
         <Image X="0" Y="0" Width="162" Height="352" ImageFile="SideBar.png"/>

Tools/msi/bundle/Default.wxl

@@ -21,6 +21,8 @@ Continue?</String>
   <String Id="InstallHeader">Install [WixBundleName]</String>
   <String Id="InstallMessage">Select Install Now to install Python with default settings, or choose Customize to enable or disable features.</String>
   <String Id="InstallVersion">Version [WixBundleVersion]</String>
+  <String Id="InstallUpgradeHeader">Upgrade to [WixBundleName]</String>
+  <String Id="InstallUpgradeMessage">Select Upgrade Now to keep your current settings, or choose Customize to enable or disable features.</String>
   <String Id="ConfirmCancelMessage">Are you sure you want to cancel?</String>
   <String Id="ExecuteUpgradeRelatedBundleMessage">Previous version</String>
   <String Id="HelpHeader">Setup Help</String>
@@ -40,8 +42,8 @@ Continue?</String>
     Logs to a specific file. By default, log files are created in %TEMP%.</String>
   <String Id="InstallLicenseLinkText">[WixBundleName] &lt;a href="#"&gt;license terms&lt;/a&gt;.</String>
   <String Id="InstallAcceptCheckbox">I &amp;agree to the license terms and conditions</String>
-  <String Id="InstallJustForMeButton">&amp;Install Now</String>
-  <String Id="InstallJustForMeButtonNote">[DefaultJustForMeTargetDir]
+  <String Id="InstallButton">&amp;Install Now</String>
+  <String Id="InstallButtonNote">[DefaultJustForMeTargetDir]
 
 Includes IDLE, pip and documentation
 Creates shortcuts and file associations</String>
@@ -49,6 +51,13 @@ Creates shortcuts and file associations</String>
   <String Id="InstallCustomButtonNote">Choose location and features</String>
   <String Id="InstallSimpleButton">&amp;Install</String>
   <String Id="InstallSimpleButtonNote">Uses setting preselected by your administrator</String>
+  <String Id="InstallUpgradeButton">&amp;Upgrade Now</String>
+  <String Id="InstallUpgradeButtonNote">[TargetDir]
+
+Replaces your existing installation without changing settings.
+Select Customize to review current options.</String>
+  <String Id="InstallUpgradeCustomButton">C&amp;ustomize installation</String>
+  <String Id="InstallUpgradeCustomButtonNote">Choose location and features</String>
   <String Id="Custom1Header">Optional Features</String>
   <String Id="Custom2Header">Advanced Options</String>
   <String Id="CustomLocationLabel">Customize install location</String>
@@ -107,4 +116,5 @@ Feel free to email &lt;a href="mailto:python-list@python.org"&gt;python-list@pyt
   <String Id="FailureHyperlinkLogText">One or more issues caused the setup to fail. Please fix the issues and then retry setup. For more information see the &lt;a href="#"&gt;log file&lt;/a&gt;.</String>
   <String Id="FailureRestartText">You must restart your computer to complete the rollback of the software.</String>
   <String Id="FailureRestartButton">&amp;Restart</String>
+  <String Id="FailureExistingInstall">Unable to install [WixBundleName] due to an existing install. Use Programs and Features to modify, repair or remove [WixBundleName].</String>
 </WixLocalization>

Tools/msi/bundle/bootstrap/pythonba.vcxproj

@@ -31,7 +31,7 @@
   <PropertyGroup Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
-    <IntDir>$(ProjectDir)..\..\obj\$(Configuration)_Bootstrap\</IntDir>
+    <IntDir>$(PySourcePath)PCBuild\obj\$(Configuration)_$(Platform)_Setup\Bootstrap\</IntDir>
     <OutDir>$(IntDir)</OutDir>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />

Tools/msi/bundle/bundle.wxs

@@ -23,14 +23,18 @@
     <Variable Name="ShortVersion" Value="$(var.MajorVersionNumber).$(var.MinorVersionNumber)" />
     <Variable Name="ShortVersionNoDot" Value="$(var.MajorVersionNumber)$(var.MinorVersionNumber)" />
 
-    <Variable Name="InstallAllUsers" Value="0" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="TargetDir" Value="" Persisted="yes" bal:Overridable="yes" />
+    <Variable Name="InstallAllUsers" Value="0" bal:Overridable="yes" />
+    <Variable Name="TargetDir" Value="" bal:Overridable="yes" />
     <?if $(var.Platform)~="x64" ?>
     <Variable Name="DefaultAllUsersTargetDir" Value="[ProgramFiles64Folder]Python [ShortVersion]" bal:Overridable="yes" />
+    <Variable Name="TargetPlatform" Value="x64" />
     <?else ?>
     <Variable Name="DefaultAllUsersTargetDir" Value="[ProgramFilesFolder]Python [ShortVersion]" bal:Overridable="yes" />
+    <Variable Name="TargetPlatform" Value="x86" />
     <?endif ?>
     <Variable Name="DefaultJustForMeTargetDir" Value="[LocalAppDataFolder]Programs\Python\Python[ShortVersionNoDot]$(var.Suffix32)" bal:Overridable="yes" />
+    <Variable Name="OptionalFeaturesRegistryKey" Value="Software\$(var.TestPrefix)Python\PythonCore\[ShortVersion]$(var.Suffix32)\InstalledFeatures" />
+    <Variable Name="TargetDirRegistryKey" Value="Software\$(var.TestPrefix)Python\PythonCore\[ShortVersion]$(var.Suffix32)\InstallPath" />
     
     <!--
     An empty string will use the other defaults based on InstallAllUsers
@@ -44,23 +48,23 @@
     <Variable Name="TargetDirState" Value="enabled" />
     <Variable Name="CustomBrowseButtonState" Value="enabled" />
 
-    <Variable Name="Include_core" Value="1" Persisted="yes" />
-    <Variable Name="Include_exe" Value="1" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="Include_dev" Value="1" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="Include_lib" Value="1" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="Include_test" Value="1" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="Include_doc" Value="1" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="Include_tools" Value="1" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="Include_tcltk" Value="1" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="Include_pip" Value="1" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="Include_launcher" Value="1" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="Include_symbols" Value="0" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="Include_debug" Value="0" Persisted="yes" bal:Overridable="yes" />
+    <Variable Name="Include_core" Value="1" />
+    <Variable Name="Include_exe" Value="1" bal:Overridable="yes" />
+    <Variable Name="Include_dev" Value="1" bal:Overridable="yes" />
+    <Variable Name="Include_lib" Value="1" bal:Overridable="yes" />
+    <Variable Name="Include_test" Value="1" bal:Overridable="yes" />
+    <Variable Name="Include_doc" Value="1" bal:Overridable="yes" />
+    <Variable Name="Include_tools" Value="1" bal:Overridable="yes" />
+    <Variable Name="Include_tcltk" Value="1" bal:Overridable="yes" />
+    <Variable Name="Include_pip" Value="1" bal:Overridable="yes" />
+    <Variable Name="Include_launcher" Value="1" bal:Overridable="yes" />
+    <Variable Name="Include_symbols" Value="0" bal:Overridable="yes" />
+    <Variable Name="Include_debug" Value="0" bal:Overridable="yes" />
     
-    <Variable Name="AssociateFiles" Value="1" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="Shortcuts" Value="1" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="PrependPath" Value="0" Persisted="yes" bal:Overridable="yes" />
-    <Variable Name="CompileAll" Value="0" Persisted="yes" bal:Overridable="yes" />
+    <Variable Name="AssociateFiles" Value="1" bal:Overridable="yes" />
+    <Variable Name="Shortcuts" Value="1" bal:Overridable="yes" />
+    <Variable Name="PrependPath" Value="0" bal:Overridable="yes" />
+    <Variable Name="CompileAll" Value="0" bal:Overridable="yes" />
     
     <Variable Name="SimpleInstall" Value="0" bal:Overridable="yes" />
     

Tools/msi/bundle/packagegroups/core.wxs

@@ -9,6 +9,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and (Include_core or Include_exe or Include_launcher or Include_pip)">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="core_AllUsers_pdb"
                         SourceFile="core_pdb.msi"
@@ -17,6 +18,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and (Include_core or Include_exe or Include_launcher or Include_pip) and Include_symbols">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="core_AllUsers_d"
                         SourceFile="core_d.msi"
@@ -25,6 +27,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and (Include_core or Include_exe or Include_launcher or Include_pip) and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
 
             <MsiPackage Id="core_JustForMe"
@@ -34,6 +37,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and (Include_core or Include_exe or Include_launcher or Include_pip)">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="core_JustForMe_pdb"
                         SourceFile="core_pdb.msi"
@@ -42,6 +46,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and (Include_core or Include_exe or Include_launcher or Include_pip) and Include_symbols">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="core_JustForMe_d"
                         SourceFile="core_d.msi"
@@ -50,6 +55,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and (Include_core or Include_exe or Include_launcher or Include_pip) and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
         </PackageGroup>
     </Fragment>

Tools/msi/bundle/packagegroups/dev.wxs

@@ -9,6 +9,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and Include_dev">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="dev_AllUsers_d"
                         SourceFile="dev_d.msi"
@@ -17,6 +18,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and Include_dev and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
 
             <MsiPackage Id="dev_JustForMe"
@@ -26,6 +28,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and Include_dev">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="dev_JustForMe_d"
                         SourceFile="dev_d.msi"
@@ -34,6 +37,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and Include_dev and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
         </PackageGroup>
     </Fragment>

Tools/msi/bundle/packagegroups/doc.wxs

@@ -10,6 +10,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and Include_doc">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             
             <MsiPackage Id="doc_JustForMe"
@@ -20,6 +21,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and Include_doc">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
         </PackageGroup>
     </Fragment>

Tools/msi/bundle/packagegroups/exe.wxs

@@ -10,6 +10,7 @@
                         EnableFeatureSelection="yes"
                         InstallCondition="InstallAllUsers and (Include_exe or Include_launcher or Include_pip)">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="exe_AllUsers_pdb"
                         SourceFile="exe_pdb.msi"
@@ -18,6 +19,7 @@
                         DownloadUrl="$(var.DownloadUrl)"
                         InstallCondition="InstallAllUsers and (Include_exe or Include_launcher or Include_pip) and Include_symbols">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="exe_AllUsers_d"
                         SourceFile="exe_d.msi"
@@ -26,6 +28,7 @@
                         DownloadUrl="$(var.DownloadUrl)"
                         InstallCondition="InstallAllUsers and (Include_exe or Include_launcher or Include_pip) and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             
             <MsiPackage Id="exe_JustForMe"
@@ -36,6 +39,7 @@
                         EnableFeatureSelection="yes"
                         InstallCondition="not InstallAllUsers and (Include_exe or Include_launcher or Include_pip)">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="exe_JustForMe_pdb"
                         SourceFile="exe_pdb.msi"
@@ -44,6 +48,7 @@
                         DownloadUrl="$(var.DownloadUrl)"
                         InstallCondition="not InstallAllUsers and (Include_exe or Include_launcher or Include_pip) and Include_symbols">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="exe_JustForMe_d"
                         SourceFile="exe_d.msi"
@@ -52,6 +57,7 @@
                         DownloadUrl="$(var.DownloadUrl)"
                         InstallCondition="not InstallAllUsers and (Include_exe or Include_launcher or Include_pip) and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
         </PackageGroup>
     </Fragment>

Tools/msi/bundle/packagegroups/lib.wxs

@@ -9,6 +9,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and Include_lib">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="lib_AllUsers_pdb"
                         SourceFile="lib_pdb.msi"
@@ -17,6 +18,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and Include_lib and Include_symbols">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="lib_AllUsers_d"
                         SourceFile="lib_d.msi"
@@ -25,6 +27,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and Include_lib and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
 
             <MsiPackage Id="lib_JustForMe"
@@ -34,6 +37,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and Include_lib">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="lib_JustForMe_pdb"
                         SourceFile="lib_pdb.msi"
@@ -42,6 +46,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and Include_lib and Include_symbols">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="lib_JustForMe_d"
                         SourceFile="lib_d.msi"
@@ -50,6 +55,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and Include_lib and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
         </PackageGroup>
     </Fragment>

Tools/msi/bundle/packagegroups/postinstall.wxs

@@ -9,6 +9,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and Include_pip">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="pip_JustForMe"
                         SourceFile="pip.msi"
@@ -17,6 +18,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and Include_pip">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             
             <MsiPackage Id="path_AllUsers"
@@ -26,6 +28,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and PrependPath">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="path_JustForMe"
                         SourceFile="path.msi"
@@ -34,6 +37,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and PrependPath">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             
             <?define CompileAllCommand=-$(var.ShortVersion)$(var.Suffix32) -E -s -Wi "[TargetDir]\Lib\compileall.py" -f -x "bad_coding|badsyntax|site-packages|py2_|lib2to3\\tests|venv\\scripts" "[TargetDir]\Lib"?>

Tools/msi/bundle/packagegroups/tcltk.wxs

@@ -10,6 +10,7 @@
                         EnableFeatureSelection="yes"
                         InstallCondition="InstallAllUsers and Include_tcltk">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="tcltk_AllUsers_pdb"
                         SourceFile="tcltk_pdb.msi"
@@ -19,6 +20,7 @@
                         EnableFeatureSelection="yes"
                         InstallCondition="InstallAllUsers and Include_tcltk and Include_symbols">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="tcltk_AllUsers_d"
                         SourceFile="tcltk_d.msi"
@@ -28,6 +30,7 @@
                         EnableFeatureSelection="yes"
                         InstallCondition="InstallAllUsers and Include_tcltk and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
 
             <MsiPackage Id="tcltk_JustForMe"
@@ -38,6 +41,7 @@
                         EnableFeatureSelection="yes"
                         InstallCondition="not InstallAllUsers and Include_tcltk">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="tcltk_JustForMe_pdb"
                         SourceFile="tcltk_pdb.msi"
@@ -47,6 +51,7 @@
                         EnableFeatureSelection="yes"
                         InstallCondition="not InstallAllUsers and Include_tcltk and Include_symbols">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="tcltk_JustForMe_d"
                         SourceFile="tcltk_d.msi"
@@ -56,6 +61,7 @@
                         EnableFeatureSelection="yes"
                         InstallCondition="not InstallAllUsers and Include_tcltk and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
         </PackageGroup>
     </Fragment>

Tools/msi/bundle/packagegroups/test.wxs

@@ -9,6 +9,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and Include_test">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="test_AllUsers_pdb"
                         SourceFile="test_pdb.msi"
@@ -17,6 +18,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and Include_test and Include_symbols">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="test_AllUsers_d"
                         SourceFile="test_d.msi"
@@ -25,6 +27,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and Include_test and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
 
             <MsiPackage Id="test_JustForMe"
@@ -34,6 +37,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and Include_test">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="test_JustForMe_pdb"
                         SourceFile="test_pdb.msi"
@@ -42,6 +46,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and Include_test and Include_symbols">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             <MsiPackage Id="test_JustForMe_d"
                         SourceFile="test_d.msi"
@@ -50,6 +55,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and Include_test and Include_debug">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
         </PackageGroup>
     </Fragment>

Tools/msi/bundle/packagegroups/tools.wxs

@@ -9,6 +9,7 @@
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and Include_tools">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
             
             <MsiPackage Id="tools_JustForMe"
@@ -18,6 +19,7 @@
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and Include_tools">
                 <MsiProperty Name="TARGETDIR" Value="[TargetDir]" />
+                <MsiProperty Name="OPTIONALFEATURESREGISTRYKEY" Value="[OptionalFeaturesRegistryKey]" />
             </MsiPackage>
         </PackageGroup>
     </Fragment>

Tools/msi/common.wxs

@@ -4,6 +4,15 @@
         <Property Id="REGISTRYKEY" Value="Software\$(var.TestPrefix)Python\PythonCore\$(var.ShortVersion)$(var.Suffix32)" />
     </Fragment>
     
+    <Fragment>
+        <Component Id="OptionalFeature" Guid="*" Directory="InstallDirectory">
+            <Condition>OPTIONALFEATURESREGISTRYKEY</Condition>
+            <RegistryKey Root="HKMU" Key="[OPTIONALFEATURESREGISTRYKEY]">
+                <RegistryValue Type="string" Name="$(var.OptionalFeatureName)" Value="$(var.Version)" KeyPath="yes" />
+            </RegistryKey>
+        </Component>
+    </Fragment>
+    
     <Fragment>
         <Property Id="UpgradeTable" Value="1" />
         

Tools/msi/core/core_d.wxs

@@ -8,6 +8,7 @@
         
         <Feature Id="DebugBinaries" AllowAdvertise="no" Title="!(loc.Title_d)" Description="!(loc.Description_d)">
             <ComponentGroupRef Id="core_dll_d" />
+            <ComponentRef Id="OptionalFeature" />
         </Feature>
     </Product>
 </Wix>

Tools/msi/core/core_pdb.wxs

@@ -8,6 +8,7 @@
         
         <Feature Id="Symbols" AllowAdvertise="no" Title="!(loc.TitlePdb)" Description="!(loc.DescriptionPdb)">
             <ComponentGroupRef Id="core_symbols" />
+            <ComponentRef Id="OptionalFeature" />
         </Feature>
     </Product>
 </Wix>

Tools/msi/dev/dev.wxs

@@ -13,6 +13,7 @@
 <?ifdef IncludeMinGWLib ?>
             <ComponentGroupRef Id="dev_mingw" />
 <?endif ?>
+            <ComponentRef Id="OptionalFeature" />
         </Feature>
     </Product>
 </Wix>

Tools/msi/doc/doc.wxs

@@ -9,13 +9,16 @@
         
         <Feature Id="DefaultFeature" AllowAdvertise="no" Title="!(loc.Title)" Description="!(loc.Description)">
             <ComponentGroupRef Id="doc" Primary="yes" />
+            <ComponentRef Id="OptionalFeature" />
         </Feature>
         <Feature Id="Shortcuts" AllowAdvertise="no" Title="!(loc.Title)" Description="!(loc.Description)">
             <ComponentGroupRef Id="doc" />
             
             <?ifdef DocFilename ?>
             <Component Id="doc_shortcut" Directory="MenuDir" Guid="*">
-                <RegistryValue Root="HKMU" Key="[REGISTRYKEY]\DocShortcuts" Type="integer" Value="1" KeyPath="yes" />
+                <RegistryKey Root="HKMU" Key="[OPTIONALFEATURESREGISTRYKEY]">
+                    <RegistryValue Name="$(var.OptionalFeatureName)_shortcut" Type="string" Value="$(var.Version)" KeyPath="yes" />
+                </RegistryKey>
                 <Shortcut Id="python.chm"
                           Target="[#python.chm]"
                           Name="!(loc.ShortcutName)"

Tools/msi/exe/exe.wxs

@@ -11,6 +11,7 @@
             <ComponentGroupRef Id="exe_python" Primary="yes" />
             <ComponentGroupRef Id="exe_txt" />
             <ComponentGroupRef Id="exe_icons" />
+            <ComponentRef Id="OptionalFeature" />
         </Feature>
             
         <Feature Id="Shortcuts" AllowAdvertise="no" Title="!(loc.Title)" Description="!(loc.Description)">
@@ -23,6 +24,7 @@
                 <RemoveFolder Id="Remove_MenuDir" Directory="MenuDir" On="uninstall" />
                 <RegistryKey Root="HKMU" Key="[REGISTRYKEY]">
                     <RegistryValue Key="InstallPath\InstallGroup" Type="string" Value="!(loc.ProductName)" KeyPath="yes" />
+                    <RegistryValue Key="InstalledFeatures" Name="Shortcuts" Type="string" Value="$(var.Version)" />
                 </RegistryKey>
             </Component>
         </Feature>

Tools/msi/exe/exe_files.wxs

@@ -23,6 +23,7 @@
                 
                 <RegistryKey Root="HKMU" Key="[REGISTRYKEY]">
                     <RegistryValue Key="InstallPath" Type="string" Value="[InstallDirectory]" KeyPath="no" />
+                    <RegistryValue Key="InstallPath" Name="ExecutablePath" Type="string" Value="[#python.exe]" KeyPath="no" />
                 </RegistryKey>
             </Component>
             <Component Id="pythonw.exe" Directory="InstallDirectory" Guid="$(var.PythonwExeComponentGuid)">

Tools/msi/launcher/launcher_files.wxs

@@ -4,6 +4,7 @@
         <ComponentGroup Id="launcher_exe">
             <Component Id="py.exe" Directory="LauncherInstallDirectory" Guid="{B5107402-6958-461B-8B0A-4037D3327160}">
                 <File Id="py.exe" Name="py.exe" Source="py.exe" KeyPath="yes" />
+                <RegistryValue Root="HKMU" Key="Software\Python\PyLauncher" Value="[#py.exe]" Type="string" />
             </Component>
             <Component Id="pyw.exe" Directory="LauncherInstallDirectory" Guid="{8E52B8CD-48BB-4D74-84CD-6238BCD11F20}">
                 <File Id="pyw.exe" Name="pyw.exe" Source="pyw.exe" KeyPath="yes" />
@@ -12,12 +13,12 @@
             <Component Id="launcher_path_cu" Directory="LauncherInstallDirectory" Guid="{95AEB930-367C-475C-A17E-A89BFCD4C670}">
                 <Condition>NOT ALLUSERS=1</Condition>
                 
-                <RegistryValue KeyPath="yes" Root="HKMU" Key="Software\Python\PyLauncher\InstallDir" Value="[LauncherInstallDirectory]" Type="string" />
+                <RegistryValue KeyPath="yes" Root="HKMU" Key="Software\Python\PyLauncher" Name="InstallDir" Value="[LauncherInstallDirectory]" Type="string" />
                 <Environment Id="PATH_CU" Action="set" Name="PATH" Part="first" Value="[LauncherInstallDirectory]" />
             </Component>
             <Component Id="launcher_path_lm" Directory="LauncherInstallDirectory" Guid="{4A41C365-4E27-4D38-A6D1-4A01B4A6500C}">
                 <Condition>ALLUSERS=1</Condition>
-                <RegistryValue KeyPath="yes" Root="HKMU" Key="Software\Python\PyLauncher\InstallDir" Value="[LauncherInstallDirectory]" Type="string" />
+                <RegistryValue KeyPath="yes" Root="HKMU" Key="Software\Python\PyLauncher" Name="InstallDir" Value="[LauncherInstallDirectory]" Type="string" />
             </Component>
         </ComponentGroup>
     </Fragment>

Tools/msi/launcher/launcher_reg.wxs

@@ -3,7 +3,7 @@
     <Fragment>
         <ComponentGroup Id="launcher_reg">
             <Component Id="file_association" Directory="LauncherInstallDirectory" Guid="{5AF84D9A-D820-456B-B230-6E0105A50276}">
-                <RegistryValue KeyPath="yes" Root="HKMU" Key="Software\Python\PyLauncher\AssociateFiles" Value="1" Type="integer" />
+                <RegistryValue KeyPath="yes" Root="HKMU" Key="Software\Python\PyLauncher" Name="AssociateFiles" Value="1" Type="integer" />
                 
                 <ProgId Id="$(var.TestPrefix)Python.File" Description="!(loc.PythonFileDescription)" Advertise="no" Icon="py.exe" IconIndex="1">
                     <Extension Id="$(var.FileExtension)" ContentType="text/plain">

Tools/msi/lib/lib.wxs

@@ -11,6 +11,7 @@
             <ComponentGroupRef Id="lib_py" />
             <ComponentGroupRef Id="lib_files" />
             <ComponentGroupRef Id="lib_extensions" />
+            <ComponentRef Id="OptionalFeature" />
         </Feature>
     </Product>
 </Wix>

Tools/msi/msi.props

@@ -43,7 +43,7 @@
     </ItemGroup>
 
     <PropertyGroup>
-        <IntermediateOutputPath>$(MSBuildThisFileDirectory)\obj\$(Configuration)_$(Platform)\$(OutputName)</IntermediateOutputPath>
+        <IntermediateOutputPath>$(PySourcePath)PCBuild\obj\$(Configuration)_$(Platform)_Setup\$(OutputName)</IntermediateOutputPath>
         <IntermediateOutputPath Condition="'$(OutputSuffix)' != ''">$(IntermediateOutputPath)_$(OutputSuffix)</IntermediateOutputPath>
         <OutputPath Condition="'$(OutputPath)' == ''">$(BuildPath)</OutputPath>
         <OutputPath Condition="!HasTrailingSlash($(OutputPath))">$(OutputPath)\</OutputPath>
@@ -71,6 +71,7 @@
             NextMajorVersionNumber=$(MajorVersionNumber).$([msbuild]::Add($(MinorVersionNumber), 1)).0.0;
             Bitness=$(Bitness);
             PyDebugExt=$(PyDebugExt);
+            OptionalFeatureName=$(OutputName);
         </DefineConstants>
         <DefineConstants Condition="'$(CRTRedist)' != ''">
             $(DefineConstants);CRTRedist=$(CRTRedist);
@@ -112,9 +113,6 @@
         <LinkerBindInputPaths Include="$(CRTRedist)" Condition="'$(CRTRedist)' != ''">
             <BindName>redist</BindName>
         </LinkerBindInputPaths>
-        <LinkerBindInputPaths Include="$(CRTRedist)\$(Platform)" Condition="'$(CRTRedist)' != ''">
-            <BindName>crt</BindName>
-        </LinkerBindInputPaths>
     </ItemGroup>
 
     <Target Name="_ValidateMsiProps" BeforeTargets="PrepareForBuild">

Tools/msi/path/path.wxs

@@ -9,7 +9,9 @@
         <Feature Id="DefaultFeature" AllowAdvertise="no" Title="!(loc.Title)" Description="!(loc.Description)">
             <Component Id="PrependPath_CU" Directory="InstallDirectory" Guid="*">
                 <Condition>NOT ALLUSERS=1</Condition>
-                <RegistryValue KeyPath="yes" Root="HKCU" Key="[REGISTRYKEY]\PrependPath" Value="1" Type="integer" />
+                <RegistryKey Root="HKCU" Key="[REGISTRYKEY]">
+                    <RegistryValue KeyPath="yes" Key="InstalledFeatures" Name="$(var.OptionalFeatureName)" Value="$(var.Version)" Type="string" />
+                </RegistryKey>
                 
                 <CreateFolder Directory="Scripts" />
                 <RemoveFolder Id="Remove_Scripts_CU" Directory="Scripts" On="uninstall" />
@@ -19,7 +21,9 @@
             </Component>
             <Component Id="PrependPath_LM" Directory="InstallDirectory" Guid="*">
                 <Condition>ALLUSERS=1</Condition>
-                <RegistryValue KeyPath="yes" Root="HKLM" Key="[REGISTRYKEY]\PrependPath" Value="1" Type="integer" />
+                <RegistryKey Root="HKLM" Key="[REGISTRYKEY]">
+                    <RegistryValue KeyPath="yes" Key="InstalledFeatures" Name="$(var.OptionalFeatureName)" Value="$(var.Version)" Type="string" />
+                </RegistryKey>
                 
                 <CreateFolder Directory="Scripts" />
                 <RemoveFolder Id="Remove_Scripts_LM" Directory="Scripts" On="uninstall" />

Tools/msi/pip/pip.wxs

@@ -15,9 +15,7 @@
         <Condition Message="!(loc.NoPython)">PYTHON_EXE</Condition>
         
         <Feature Id="DefaultFeature" AllowAdvertise="no" Title="!(loc.Title)" Description="!(loc.Description)">
-            <Component Id="pip" Guid="*" Directory="InstallDirectory">
-                <RegistryValue KeyPath="yes" Root="HKMU" Key="[REGISTRYKEY]\EnsurePipRun" Value="1" Type="integer" />
-            </Component>
+            <ComponentRef Id="OptionalFeature" />
         </Feature>
         
         <?if $(var.Platform)~="x64" ?>

Tools/msi/tcltk/tcltk.wxs

@@ -30,6 +30,7 @@
             <Component Id="idle_reg" Directory="InstallDirectory">
                 <RegistryValue KeyPath="yes" Root="HKMU" Key="[REGISTRYKEY]\Idle" Type="string" Value="[#Lib_idlelib_idle.pyw]" />
             </Component>
+            <ComponentRef Id="OptionalFeature" />
         </Feature>
         <Feature Id="AssociateFiles" AllowAdvertise="no" Title="!(loc.Title)" Description="!(loc.Description)">
             <ComponentGroupRef Id="tkinter_lib" />

Tools/msi/test/test.wxs

@@ -10,6 +10,7 @@
         <Feature Id="DefaultFeature" AllowAdvertise="no" Title="!(loc.Title)" Description="!(loc.Description)">
             <ComponentGroupRef Id="test_py" />
             <ComponentGroupRef Id="test_extensions" />
+            <ComponentRef Id="OptionalFeature" />
         </Feature>
     </Product>
 </Wix>

Tools/msi/tools/tools.wxs

@@ -9,6 +9,7 @@
         <Feature Id="DefaultFeature" AllowAdvertise="no" Title="!(loc.Title)" Description="!(loc.Description)">
             <ComponentGroupRef Id="tools_py" />
             <ComponentGroupRef Id="tools_scripts" />
+            <ComponentRef Id="OptionalFeature" />
         </Feature>
     </Product>
 </Wix>