you can use perl for that.
just take your ordinary perl code and insert #!/usr/bin/perl as the first line to let the shell know, that it's a perl script and give the file a chmod to make it executable.

In reply to Re: Can files with extension ".command" on MacOSX be perl scripts? What is a way to let users execute Perl scripts on macosx from Finder? by Taulmarill
in thread Can files with extension ".command" on MacOSX be perl scripts? What is a way to let users execute Perl scripts on macosx from Finder? by Anonymous Monk

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