cmVSSetupHelper: Support Enterprise WDK build enviornment

Enterprise WDK is a command line build enviornment that does not require
any installation prior to use.

More information and download can be found here:
https://docs.microsoft.com/en-us/windows-hardware/drivers/develop/using-the-enterprise-wdk

Signed-off-by: Jon Doron <arilou@gmail.com>

2 files changed, 34 insertions, 0 deletions

diff --git a/Source/cmVSSetupHelper.cxx b/Source/cmVSSetupHelper.cxx
index 22fe007..7a54e12 100644
--- a/Source/cmVSSetupHelper.cxx
+++ b/Source/cmVSSetupHelper.cxx
@@ -267,6 +267,19 @@ bool cmVSSetupAPIHelper::GetVCToolsetVersion(std::string& vsToolsetVersion)
   return isInstalled && !vsToolsetVersion.empty();
 }
 
+bool cmVSSetupAPIHelper::IsEWDKEnabled()
+{
+  std::string envEnterpriseWDK, envDisableRegistryUse;
+  cmSystemTools::GetEnv("EnterpriseWDK", envEnterpriseWDK);
+  cmSystemTools::GetEnv("DisableRegistryUse", envDisableRegistryUse);
+  if (!cmSystemTools::Strucmp(envEnterpriseWDK.c_str(), "True") &&
+      !cmSystemTools::Strucmp(envDisableRegistryUse.c_str(), "True")) {
+    return true;
+  }
+
+  return false;
+}
+
 bool cmVSSetupAPIHelper::EnumerateAndChooseVSInstance()
 {
   bool isVSInstanceExists = false;
@@ -274,6 +287,26 @@ bool cmVSSetupAPIHelper::EnumerateAndChooseVSInstance()
     return true;
   }
 
+  if (this->IsEWDKEnabled()) {
+    std::string envWindowsSdkDir81, envVSVersion, envVsInstallDir;
+
+    cmSystemTools::GetEnv("WindowsSdkDir_81", envWindowsSdkDir81);
+    cmSystemTools::GetEnv("VisualStudioVersion", envVSVersion);
+    cmSystemTools::GetEnv("VSINSTALLDIR", envVsInstallDir);
+    if (envVSVersion.empty() || envVsInstallDir.empty())
+      return false;
+
+    chosenInstanceInfo.VSInstallLocation =
+      std::wstring(envVsInstallDir.begin(), envVsInstallDir.end());
+    chosenInstanceInfo.Version =
+      std::wstring(envVSVersion.begin(), envVSVersion.end());
+    chosenInstanceInfo.VCToolsetVersion = envVSVersion;
+    chosenInstanceInfo.ullVersion = std::stoi(envVSVersion);
+    chosenInstanceInfo.IsWin10SDKInstalled = true;
+    chosenInstanceInfo.IsWin81SDKInstalled = !envWindowsSdkDir81.empty();
+    return true;
+  }
+
   if (initializationFailure || setupConfig == NULL || setupConfig2 == NULL ||
       setupHelper == NULL)
     return false;
diff --git a/Source/cmVSSetupHelper.h b/Source/cmVSSetupHelper.h
index 4144c15..b9cca45 100644
--- a/Source/cmVSSetupHelper.h
+++ b/Source/cmVSSetupHelper.h
@@ -150,6 +150,7 @@ private:
   HRESULT comInitialized;
   // current best instance of VS selected
   VSInstanceInfo chosenInstanceInfo;
+  bool IsEWDKEnabled();
 
   std::string SpecifiedVSInstallLocation;
 };