samples: update build script (winpack)

- drop EnableDelayedExpansion

samples/_winpack_build_sample.cmd

@@ -7,7 +7,7 @@
 :: - MSVS 2015/2017
 :: (tools are searched on default paths or environment should be pre-configured)
 @echo off
-setlocal ENABLEEXTENSIONS ENABLEDELAYEDEXPANSION
+setlocal
 
 set SCRIPTDIR=%~dp0
 if NOT exist "%SCRIPTDIR%\..\..\build" (
@@ -28,20 +28,20 @@ if NOT "%~x1" == ".cpp" (
   goto die
 )
 set SRC_FILENAME=%~dpnx1
-echo SRC_FILENAME=!SRC_FILENAME!
-call :dirname "!SRC_FILENAME!" SRC_DIR
-echo SRC_DIR=!SRC_DIR!
+echo SRC_FILENAME=%SRC_FILENAME%
+call :dirname "%SRC_FILENAME%" SRC_DIR
+echo SRC_DIR=%SRC_DIR%
 set "SRC_NAME=%~n1"
-echo SRC_NAME=!SRC_NAME!
+echo SRC_NAME=%SRC_NAME%
 echo ================================================================================
 
 :: Path to FFMPEG binary files
-set "PATH=!PATH!;!SCRIPTDIR!\..\..\build\bin\"
+set "PATH=%PATH%;%SCRIPTDIR%\..\..\build\bin\"
 
 :: Detect compiler
 cl /? >NUL 2>NUL <NUL
-if !ERRORLEVEL! NEQ 0 (
-  PUSHD !CD!
+if %ERRORLEVEL% NEQ 0 (
+  PUSHD %CD%
   if exist "C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Auxiliary\Build\vcvars64.bat" (
     CALL "C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Auxiliary\Build\vcvars64.bat"
     goto check_msvc
@@ -61,7 +61,7 @@ if !ERRORLEVEL! NEQ 0 (
 :check_msvc
   POPD
   cl /? >NUL 2>NUL <NUL
-  if !ERRORLEVEL! NEQ 0 (
+  if %ERRORLEVEL% NEQ 0 (
     set "MSG=Can't detect Microsoft Visial Studio C++ compiler (cl.exe). MSVS 2015/2017 are supported only from standard locations"
     goto die
   )
@@ -69,88 +69,85 @@ if !ERRORLEVEL! NEQ 0 (
 
 :: Detect CMake
 cmake --version >NUL 2>NUL
-if !ERRORLEVEL! EQU 0 (
-  set CMAKE_FOUND=1
-) else (
-  if exist "C:\Program Files\CMake\bin" (
-    set "PATH=!PATH!;C:\Program Files\CMake\bin"
-    cmake --version >NUL 2>NUL
-    if !ERRORLEVEL! EQU 0 (
-      set CMAKE_FOUND=1
-    )
-  )
-)
-if NOT DEFINED CMAKE_FOUND (
-  set "MSG=CMake is required to build OpenCV samples. Download it from here: https://cmake.org/download/ and install into 'C:\Program Files\CMake'"
-  goto die
-) else (
-  call :execute cmake --version
-  echo CMake is detected
-)
+if %ERRORLEVEL% EQU 0 GOTO :CMAKE_FOUND
+
+if NOT exist "C:\Program Files\CMake\bin" GOTO CMAKE_NOT_FOUND
+set "PATH=%PATH%;C:\Program Files\CMake\bin"
+cmake --version >NUL 2>NUL
+if %ERRORLEVEL% EQU 0 GOTO :CMAKE_FOUND
+
+:CMAKE_NOT_FOUND
+set "MSG=CMake is required to build OpenCV samples. Download it from here: https://cmake.org/download/ and install into 'C:\Program Files\CMake'"
+goto die
+
+:CMAKE_FOUND
+set CMAKE_FOUND=1
+call :execute cmake --version
+echo CMake is detected
 
 :: Detect available MSVS version
 if NOT DEFINED VisualStudioVersion (
   set "MSG=Can't determine MSVS version. 'VisualStudioVersion' is not defined"
   goto die
 )
-if "!VisualStudioVersion!" == "14.0" (
+if "%VisualStudioVersion%" == "14.0" (
   set CMAKE_GENERATOR="Visual Studio 14 Win64"
-  set "PATH=!PATH!;!SCRIPTDIR!\..\..\build\x64\vc14\bin\"
+  set "PATH=%PATH%;%SCRIPTDIR%\..\..\build\x64\vc14\bin\"
 ) else (
-  if "!VisualStudioVersion!" == "15.0" (
+  if "%VisualStudioVersion%" == "15.0" (
     set CMAKE_GENERATOR="Visual Studio 15 Win64"
-    set "PATH=!PATH!;!SCRIPTDIR!\..\..\build\x64\vc15\bin\"
+    set "PATH=%PATH%;%SCRIPTDIR%\..\..\build\x64\vc15\bin\"
   ) else (
-    set "MSG=Unsupported MSVS version. VisualStudioVersion=!VisualStudioVersion!"
+    set "MSG=Unsupported MSVS version. VisualStudioVersion=%VisualStudioVersion%"
     goto die
   )
 )
 
-set "BUILD_DIR=!SRC_DIR!\build_!SRC_NAME!"
+set "BUILD_DIR=%SRC_DIR%\build_%SRC_NAME%"
 call :set_title Create build directory
-if NOT exist "!BUILD_DIR!" ( call :execute md "!BUILD_DIR!" )
-PUSHD "!BUILD_DIR!"
-if NOT exist "!BUILD_DIR!/sample" ( call :execute md "!BUILD_DIR!/sample" )
-call :execute copy /Y "!SCRIPTDIR!/CMakeLists.example.in" "!BUILD_DIR!/sample/CMakeLists.txt"
+if NOT exist "%BUILD_DIR%" ( call :execute md "%BUILD_DIR%" )
+PUSHD "%BUILD_DIR%"
+if NOT exist "%BUILD_DIR%/sample" ( call :execute md "%BUILD_DIR%/sample" )
+call :execute copy /Y "%SCRIPTDIR%/CMakeLists.example.in" "%BUILD_DIR%/sample/CMakeLists.txt"
 
 call :set_title Configuring via CMake
-call :execute cmake -G!CMAKE_GENERATOR! "!BUILD_DIR!\sample" -DEXAMPLE_NAME=!SRC_NAME! "-DEXAMPLE_FILE=!SRC_FILENAME!" "-DOpenCV_DIR=!SCRIPTDIR!\..\..\build"
-if !ERRORLEVEL! NEQ 0 (
-  set "MSG=CMake configuration step failed: !BUILD_DIR!"
+call :execute cmake -G%CMAKE_GENERATOR% "%BUILD_DIR%\sample" -DEXAMPLE_NAME=%SRC_NAME% "-DEXAMPLE_FILE=%SRC_FILENAME%" "-DOpenCV_DIR=%SCRIPTDIR%\..\..\build"
+if %ERRORLEVEL% NEQ 0 (
+  set "MSG=CMake configuration step failed: %BUILD_DIR%"
   goto die
 )
 
 call :set_title Build sample project via CMake
 call :execute cmake --build . --config Release
-if !ERRORLEVEL! NEQ 0 (
-  set "MSG=Build step failed: !BUILD_DIR!"
+if %ERRORLEVEL% NEQ 0 (
+  set "MSG=Build step failed: %BUILD_DIR%"
   goto die
 )
 
-call :set_title Launch !SRC_NAME!
-if NOT exist "!BUILD_DIR!\Release\!SRC_NAME!.exe" (
-  echo. "ERROR: Can't find executable file (build seems broken): !SRC_NAME!.exe"
+call :set_title Launch %SRC_NAME%
+if NOT exist "%BUILD_DIR%\Release\%SRC_NAME%.exe" (
+  echo. "ERROR: Can't find executable file (build seems broken): %SRC_NAME%.exe"
 ) else (
-  cd "!BUILD_DIR!\Release"
-  call :execute "!SRC_NAME!.exe" --help
+  cd "%BUILD_DIR%\Release"
+  call :execute "%SRC_NAME%.exe" --help
   echo ================================================================================
-  echo **  Type '!SRC_NAME!.exe' to run sample application
-  echo **  Type '!SRC_NAME!.exe --help' to get list of available options (if available)
-  echo **  Type 'start ..\!SRC_NAME!.sln' to launch MSVS IDE
+  echo **  Type '%SRC_NAME%.exe' to run sample application
+  echo **  Type '%SRC_NAME%.exe --help' to get list of available options (if available)
+  echo **  Type 'start ..\%SRC_NAME%.sln' to launch MSVS IDE
   echo **  Type 'cmake --build .. --config Release' to rebuild sample
   echo **  Type 'exit' to exit from interactive shell and open the build directory
   echo ================================================================================
 )
 
-call :set_title Hands-on: !SRC_NAME!
-cmd /k echo Current directory: !CD!
+call :set_title Hands-on: %SRC_NAME%
+cmd /k echo Current directory: %CD%
 
-call :set_title Done: !SRC_NAME!
+call :set_title Done: %SRC_NAME%
 echo Opening build directory with project files...
-explorer "!BUILD_DIR!"
+explorer "%BUILD_DIR%"
 
 POPD
-echo Done!
+echo Done%
 
 pause
 exit /B 0
@@ -166,7 +163,7 @@ exit /B 0
 
 :execute
   echo =================================================================================
-  setlocal enableextensions disabledelayedexpansion
+  setlocal
   echo %*
   call %*
   endlocal