VS: Restore include_external_msproject type detection

Refactoring in commit 3882718872 (VS: Decouple solution generation from
`.sln` file format, 2025-09-15) accidentally left out automatic
detection of the external project type id from its file extension.

Source/cmGlobalVisualStudio7Generator.cxx

@@ -175,34 +175,6 @@ std::string cmGlobalVisualStudio7Generator::FindDevEnvCommand()
   return vscmd;
 }
 
-char const* cmGlobalVisualStudio7Generator::ExternalProjectType(
-  std::string const& location)
-{
-  std::string extension = cmSystemTools::GetFilenameLastExtension(location);
-  if (extension == ".vbproj"_s) {
-    return "F184B08F-C81C-45F6-A57F-5ABD9991F28F";
-  }
-  if (extension == ".csproj"_s) {
-    return "FAE04EC0-301F-11D3-BF4B-00C04F79EFBC";
-  }
-  if (extension == ".fsproj"_s) {
-    return "F2A71F9B-5D33-465A-A702-920D77279786";
-  }
-  if (extension == ".vdproj"_s) {
-    return "54435603-DBB4-11D2-8724-00A0C9A8B90C";
-  }
-  if (extension == ".dbproj"_s) {
-    return "C8D11400-126E-41CD-887F-60BD40844F9E";
-  }
-  if (extension == ".wixproj"_s) {
-    return "930C7802-8A8C-48F9-8165-68863BCCD9DD";
-  }
-  if (extension == ".pyproj"_s) {
-    return "888888A0-9F3D-457C-B088-3A5042F75D52";
-  }
-  return "8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942";
-}
-
 std::vector<cmGlobalGenerator::GeneratedMakeCommand>
 cmGlobalVisualStudio7Generator::GenerateBuildCommand(
   std::string const& makeProgram, std::string const& projectName,

Source/cmGlobalVisualStudio7Generator.h

@@ -121,8 +121,6 @@ protected:
   std::string const& GetDevEnvCommand();
   virtual std::string FindDevEnvCommand();
 
-  static char const* ExternalProjectType(std::string const& location);
-
   bool MarmasmEnabled;
   bool MasmEnabled;
   bool NasmEnabled;

Source/cmGlobalVisualStudioGenerator.cxx

@@ -774,6 +774,38 @@ bool cmGlobalVisualStudioGenerator::Open(std::string const& bindir,
   return std::async(std::launch::async, OpenSolution, sln).get();
 }
 
+cm::string_view cmGlobalVisualStudioGenerator::ExternalProjectTypeId(
+  std::string const& path)
+{
+  using namespace cm::VS;
+  std::string const extension = cmSystemTools::GetFilenameLastExtension(path);
+  if (extension == ".vfproj"_s) {
+    return Solution::Project::TypeIdFortran;
+  }
+  if (extension == ".vbproj"_s) {
+    return Solution::Project::TypeIdVisualBasic;
+  }
+  if (extension == ".csproj"_s) {
+    return Solution::Project::TypeIdCSharp;
+  }
+  if (extension == ".fsproj"_s) {
+    return Solution::Project::TypeIdFSharp;
+  }
+  if (extension == ".vdproj"_s) {
+    return Solution::Project::TypeIdVDProj;
+  }
+  if (extension == ".dbproj"_s) {
+    return Solution::Project::TypeIdDatabase;
+  }
+  if (extension == ".wixproj"_s) {
+    return Solution::Project::TypeIdWiX;
+  }
+  if (extension == ".pyproj"_s) {
+    return Solution::Project::TypeIdPython;
+  }
+  return Solution::Project::TypeIdDefault;
+}
+
 bool cmGlobalVisualStudioGenerator::IsDependedOn(
   TargetDependSet const& projectTargets, cmGeneratorTarget const* gtIn) const
 {
@@ -936,7 +968,7 @@ cm::VS::Solution cmGlobalVisualStudioGenerator::CreateSolution(
       if (!projectType.IsEmpty()) {
         project->TypeId = *projectType;
       } else {
-        project->TypeId = Solution::Project::TypeIdDefault;
+        project->TypeId = this->ExternalProjectTypeId(project->Path);
       }
       for (std::string const& config : solution.Configs) {
         cmList mapConfig{ gt->GetProperty(cmStrCat(

Source/cmGlobalVisualStudioGenerator.h

@@ -183,6 +183,8 @@ protected:
   /** Returns true if the target system support debugging deployment. */
   virtual bool TargetSystemSupportsDeployment() const = 0;
 
+  static cm::string_view ExternalProjectTypeId(std::string const& path);
+
   std::set<std::string> IsPartOfDefaultBuild(
     std::vector<std::string> const& configs,
     TargetDependSet const& projectTargets,

Source/cmVSSolution.cxx

@@ -17,12 +17,25 @@
 namespace cm {
 namespace VS {
 
-cm::string_view const Solution::Project::TypeIdDefault =
-  "8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942"_s;
 cm::string_view const Solution::Project::TypeIdCSharp =
   "FAE04EC0-301F-11D3-BF4B-00C04F79EFBC"_s;
+cm::string_view const Solution::Project::TypeIdDatabase =
+  "C8D11400-126E-41CD-887F-60BD40844F9E"_s;
+cm::string_view const Solution::Project::TypeIdDefault =
+  "8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942"_s;
+cm::string_view const Solution::Project::TypeIdFSharp =
+  "F2A71F9B-5D33-465A-A702-920D77279786"_s;
 cm::string_view const Solution::Project::TypeIdFortran =
   "6989167D-11E4-40FE-8C1A-2192A86A7E90"_s;
+cm::string_view const Solution::Project::TypeIdPython =
+  "888888A0-9F3D-457C-B088-3A5042F75D52"_s;
+cm::string_view const Solution::Project::TypeIdVDProj =
+  "54435603-DBB4-11D2-8724-00A0C9A8B90C"_s;
+cm::string_view const Solution::Project::TypeIdVisualBasic =
+  "F184B08F-C81C-45F6-A57F-5ABD9991F28F"_s;
+cm::string_view const Solution::Project::TypeIdWiX =
+  "930C7802-8A8C-48F9-8165-68863BCCD9DD"_s;
+
 cm::string_view const Solution::Folder::TypeId =
   "2150E333-8FDC-42A3-9474-1A3956D46DE8"_s;
 

Source/cmVSSolution.h

@@ -70,9 +70,15 @@ struct Solution final
     std::vector<Project const*> BuildDependencies;
 
     // Project type GUIDs used during creation.
-    static cm::string_view const TypeIdDefault;
     static cm::string_view const TypeIdCSharp;
+    static cm::string_view const TypeIdDatabase;
+    static cm::string_view const TypeIdDefault;
+    static cm::string_view const TypeIdFSharp;
     static cm::string_view const TypeIdFortran;
+    static cm::string_view const TypeIdPython;
+    static cm::string_view const TypeIdVDProj;
+    static cm::string_view const TypeIdVisualBasic;
+    static cm::string_view const TypeIdWiX;
   };
 
   /** Represent one folder in a Solution.  */

Tests/RunCMake/include_external_msproject/AutoType-check-sln.cmake

@@ -0,0 +1,8 @@
+check_project(AutoType externalCS  "" "FAE04EC0-301F-11D3-BF4B-00C04F79EFBC" "" "")
+check_project(AutoType externalDB  "" "C8D11400-126E-41CD-887F-60BD40844F9E" "" "")
+check_project(AutoType externalFS  "" "F2A71F9B-5D33-465A-A702-920D77279786" "" "")
+check_project(AutoType externalPy  "" "888888A0-9F3D-457C-B088-3A5042F75D52" "" "")
+check_project(AutoType externalVB  "" "F184B08F-C81C-45F6-A57F-5ABD9991F28F" "" "")
+check_project(AutoType externalVD  "" "54435603-DBB4-11D2-8724-00A0C9A8B90C" "" "")
+check_project(AutoType externalVF  "" "6989167D-11E4-40FE-8C1A-2192A86A7E90" "" "")
+check_project(AutoType externalWiX "" "930C7802-8A8C-48F9-8165-68863BCCD9DD" "" "")

Tests/RunCMake/include_external_msproject/AutoType-check-slnx.cmake

@@ -0,0 +1,51 @@
+RunCMake_check_slnx("${RunCMake_TEST_BINARY_DIR}/AutoType.slnx" [[
+^<\?xml version="1\.0" encoding="UTF-8"\?>
+<Solution>
+  <Configurations>
+    <BuildType Name="Debug"/>
+    <BuildType Name="Release"/>
+    <BuildType Name="MinSizeRel"/>
+    <BuildType Name="RelWithDebInfo"/>
+    <Platform Name="[^"]+"/>
+  </Configurations>
+  <Project Path="ALL_BUILD\.vcxproj" Id="[0-9a-f-]+">
+    <BuildDependency Project="ZERO_CHECK\.vcxproj"/>
+    <BuildDependency Project="external\.csproj"/>
+    <BuildDependency Project="external\.dbproj"/>
+    <BuildDependency Project="external\.fsproj"/>
+    <BuildDependency Project="external\.pyproj"/>
+    <BuildDependency Project="external\.vbproj"/>
+    <BuildDependency Project="external\.vdproj"/>
+    <BuildDependency Project="external\.vfproj"/>
+    <BuildDependency Project="external\.wixproj"/>
+    <Build Solution="Debug\|\*" Project="false"/>
+    <Build Solution="Release\|\*" Project="false"/>
+    <Build Solution="MinSizeRel\|\*" Project="false"/>
+    <Build Solution="RelWithDebInfo\|\*" Project="false"/>
+  </Project>
+  <Project Path="ZERO_CHECK\.vcxproj" Id="[0-9a-f-]+"/>
+  <Project Path="external\.csproj" Id="[0-9a-f-]+">
+    <BuildDependency Project="ZERO_CHECK.vcxproj"/>
+  </Project>
+  <Project Path="external\.dbproj" Id="[0-9a-f-]+">
+    <BuildDependency Project="ZERO_CHECK.vcxproj"/>
+  </Project>
+  <Project Path="external\.fsproj" Id="[0-9a-f-]+">
+    <BuildDependency Project="ZERO_CHECK.vcxproj"/>
+  </Project>
+  <Project Path="external\.pyproj" Id="[0-9a-f-]+">
+    <BuildDependency Project="ZERO_CHECK.vcxproj"/>
+  </Project>
+  <Project Path="external\.vbproj" Id="[0-9a-f-]+">
+    <BuildDependency Project="ZERO_CHECK.vcxproj"/>
+  </Project>
+  <Project Path="external\.vdproj" Id="[0-9a-f-]+">
+    <BuildDependency Project="ZERO_CHECK.vcxproj"/>
+  </Project>
+  <Project Path="external\.vfproj" Id="[0-9a-f-]+">
+    <BuildDependency Project="ZERO_CHECK.vcxproj"/>
+  </Project>
+  <Project Path="external\.wixproj" Id="[0-9a-f-]+">
+    <BuildDependency Project="ZERO_CHECK.vcxproj"/>
+  </Project>
+</Solution>$]])

Tests/RunCMake/include_external_msproject/AutoType-check.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/AutoType-check-${sln_ext}.cmake)

Tests/RunCMake/include_external_msproject/AutoType.cmake

@@ -0,0 +1,8 @@
+include_external_msproject(externalCS  external.csproj)
+include_external_msproject(externalDB  external.dbproj)
+include_external_msproject(externalFS  external.fsproj)
+include_external_msproject(externalPy  external.pyproj)
+include_external_msproject(externalVB  external.vbproj)
+include_external_msproject(externalVD  external.vdproj)
+include_external_msproject(externalVF  external.vfproj)
+include_external_msproject(externalWiX external.wixproj)

Tests/RunCMake/include_external_msproject/RunCMakeTest.cmake

@@ -8,6 +8,7 @@ else()
   set(sln_ext "slnx")
 endif()
 
+run_cmake(AutoType)
 run_cmake(CustomGuid)
 run_cmake(CustomTypePlatform)
 run_cmake(CustomGuidTypePlatform)