I'm looking for a simple way to test if an executable exists in the PATH environment variable from a Windows batch file.
Usage of external tools not provided by the OS is not allowed. The minimal Windows version required is Windows XP.
Windows Vista and later versions ship with a program called where.exe
that searches for programs in the path. It works like this:
D:\>where notepad
C:\Windows\System32\notepad.exe
C:\Windows\notepad.exe
D:\>where where
C:\Windows\System32\where.exe
For use in a batch file you can use the /q
switch, which just sets ERRORLEVEL
and doesn't produce any output.
where /q myapplication
IF ERRORLEVEL 1 (
ECHO The application is missing. Ensure it is installed and placed in your PATH.
EXIT /B
) ELSE (
ECHO Application exists. Let's go!
)
Or a simple (but less readable) shorthand version that prints the message and exits your app:
where /q myapplication || ECHO Cound not find app. && EXIT /B