For non-root folder, such as "X:\bp", the EDK_TOOLS_PATH will
resolve to "X:\bp\edk2\BaseTools". This is OK.

But if WORKSPACE is at a root folder, such as "X:\", the EDK_TOOLS_PATH
will look like "X:\\BaseTools". The *double backslash* can fail the command
like "del" and thus affect the %ERRORLEVEL% variable, which may break
subsequent build processing.

Cc: Liming Gao <liming....@intel.com>
Cc: Yonghong Zhu <yonghong....@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yunhua Feng <yunhuax.f...@intel.com>
---
 edksetup.bat | 39 +++++++++++++++++++++++++--------------
 1 file changed, 25 insertions(+), 14 deletions(-)

diff --git a/edksetup.bat b/edksetup.bat
index 97e2330e8c..c32755a471 100755
--- a/edksetup.bat
+++ b/edksetup.bat
@@ -57,26 +57,37 @@ if /I "%1"=="/h" goto Usage
 if /I "%1"=="/?" goto Usage
 if /I "%1"=="/help" goto Usage
 
 if /I "%1"=="NewBuild" shift
 if not defined EDK_TOOLS_PATH (
-  if exist %WORKSPACE%\BaseTools (
-    set EDK_TOOLS_PATH=%WORKSPACE%\BaseTools
-  ) else (
-    if defined PACKAGES_PATH (
-      for %%i IN (%PACKAGES_PATH%) DO (
-        if exist %%~fi\BaseTools (
-          set EDK_TOOLS_PATH=%%~fi\BaseTools
-          goto checkNt32Flag
-        )
+  goto SetEdkToolsPath
+) else (
+  goto checkNt32Flag
+)
+
+:SetEdkToolsPath
+if %WORKSPACE:~-1% EQU \ (
+  @set EDK_BASETOOLS=%WORKSPACE%BaseTools
+) else (
+  @set EDK_BASETOOLS=%WORKSPACE%\BaseTools
+)
+if exist %EDK_BASETOOLS% (
+  set EDK_TOOLS_PATH=%EDK_BASETOOLS%
+  set EDK_BASETOOLS=
+) else (
+  if defined PACKAGES_PATH (
+    for %%i IN (%PACKAGES_PATH%) DO (
+      if exist %%~fi\BaseTools (
+        set EDK_TOOLS_PATH=%%~fi\BaseTools
+        goto checkNt32Flag
       )
-    ) else (
-      echo.
-      echo !!! ERROR !!! Cannot find BaseTools !!!
-      echo.
-      goto BadBaseTools
     )
+  ) else (
+    echo.
+    echo !!! ERROR !!! Cannot find BaseTools !!!
+    echo.
+    goto BadBaseTools
   )
 )
 
 :checkNt32Flag
 if exist %EDK_TOOLS_PATH%\Source set BASE_TOOLS_PATH=%EDK_TOOLS_PATH%
-- 
2.12.2.windows.2

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