MSIX: implement initial msix installer

src/common/common.vcxproj

@@ -112,6 +112,7 @@
     <ClInclude Include="two_way_pipe_message_ipc.h" />
     <ClInclude Include="version.h" />
     <ClInclude Include="windows_colors.h" />
+    <ClInclude Include="winstore.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="animation.cpp" />
@@ -133,6 +134,7 @@
     <ClCompile Include="tasklist_positions.cpp" />
     <ClCompile Include="common.cpp" />
     <ClCompile Include="windows_colors.cpp" />
+    <ClCompile Include="winstore.cpp" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

src/common/common.vcxproj.filters

@@ -78,6 +78,9 @@
     <ClInclude Include="json.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="winstore.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="d2d_svg.cpp">
@@ -126,5 +129,8 @@
     <ClCompile Include="json.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="winstore.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>

src/common/winstore.cpp

@@ -0,0 +1,11 @@
+#include "pch.h"
+#include "winstore.h"
+
+#include <appmodel.h>
+
+bool running_as_packaged()
+{
+    UINT32 length = 0;
+    const auto rc = GetPackageFamilyName(GetCurrentProcess(), &length, nullptr);
+    return rc != APPMODEL_ERROR_NO_PACKAGE;
+}

src/common/winstore.h

@@ -0,0 +1,3 @@
+#pragma once
+
+bool running_as_packaged();