Adding flags to a batch script

Question

I'm writing a Batch script that will run on a directory. I want to be able to add a flag (such as -r or /r or something like that) that will make the script run the folder tree instead of the single directory. Is it possible to add flag options using batch?

Thanks

Answer 1

Certainly it's possible. Command line parameters are passed in to your batch file as %1, %2, etc. (%0 is the name of the batch file.)

IF "%1"=="/r" ECHO You passed the /r flag.

Use SHIFT to drop the first argument and move all the others over by one. You can use that to get a bit fancier if you want to allow that /r to be anywhere in the command line. For example:

:processargs
SET ARG=%1
IF DEFINED ARG (
    IF "%ARG%"=="/r" ECHO You passed the /r flag.
    SHIFT
    GOTO processargs
)

Or use %* (which expands to the entire argument list) in a FOR loop like this:

FOR %%A IN (%*) DO (
    IF "%%A"=="/r" ECHO You passed the /r flag.
)