ci(amd64/msvc): source vsdevcmd.bat

.drone.yml

@@ -13,7 +13,7 @@ platform:
 
 steps:
 - name: unit tests
-  shell: powershell
+  shell: 'C:\Program Files\Microsoft Visual Studio\18\Enterprise\Common7\Tools\VsDevCmd.bat'
   commands: 
     - ./tools/ci/amd64/msvc/unit_tests.ps1
 

tools/ci/amd64/msvc/unit_tests.ps1

@@ -1,8 +1,5 @@
 # @ref https://learn.microsoft.com/en-us/cpp/build/reference/compiler-options-listed-by-category
 
-# @todo(Light): Pull the path from an environment variable
-cmd /c '"C:\Program Files\Microsoft Visual Studio\18\Enterprise\Common7\Tools\VsDevCmd.bat" && powershell -NoProfile -Command "."'
-
 if (Test-Path "./build") {
     Remove-Item "./build" -r -force
 }