setup_vs_tools.cmd

@if not defined _echo @echo off

REM This script is responsible for setting up the vs2017 or vs2019 env
REM All passed arguments are ignored
REM Script will return with 0 if pass, 1 if there is a failure to find either
REM vs2017 or vs2019

:: Default to highest Visual Studio version available
::
:: For VS2017 and later, multiple instances can be installed on the same box SxS and VS1*0COMNTOOLS
:: is no longer set as a global environment variable and is instead only set if the user
:: has launched the Visual Studio Developer Command Prompt.
::
:: Following this logic, we will default to the Visual Studio toolset assocated with the active
:: Developer Command Prompt. Otherwise, we will query VSWhere to locate the later version of
:: Visual Studio available on the machine. Finally, we will fail the script if not supported
:: instance can be found.

if defined VisualStudioVersion (
    if not defined __VSVersion echo %__MsgPrefix%Detected Visual Studio %VisualStudioVersion% developer command ^prompt environment
    goto skip_setup
)

echo %__MsgPrefix%Searching ^for Visual Studio 2017 or later installation
set _VSWHERE="%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe"
if exist %_VSWHERE% (
    for /f "usebackq tokens=*" %%i in (`%_VSWHERE% -latest -prerelease -property installationPath`) do set _VSCOMNTOOLS=%%i\Common7\Tools
    goto call_vs
)
echo Visual Studio 2017 or later not found
:call_vs
if not exist "%_VSCOMNTOOLS%" (
    echo %__MsgPrefix%Error: Visual Studio 2017 or 2019 required.
    echo        Please see https://github.com/dotnet/runtime/blob/master/docs/workflow/requirements/windows-requirements.md for build instructions.
    exit /b 1
)
echo %__MsgPrefix%"%_VSCOMNTOOLS%\VsDevCmd.bat"
call "%_VSCOMNTOOLS%\VsDevCmd.bat"

:skip_setup

exit /b 0