Incremental numbering? Post: 302763369

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Top Forums Shell Programming and Scripting Incremental numbering? Post 302763369 by scribling on Wednesday 30th of January 2013 01:46:21 AM

01-30-2013

Registered User

Yes, so close ...

Well, it works great on the input file but unfortunately some other .aep files in the directory also get incremented.

I've altered it to work.

Code:

#!/bin/sh

for file in "$@"
do
        ext=${file##*.}
        base=${file%.*}
        num=${base##*v}
        zeroes=${num%%[!0]*}
        num=${num#$zeroes}      #remove leading zeros, or it uses octal
        num=$((num+1))
        base=${base%v*}
        new=$(printf '%sv%04d.%s' "$base" "$num" "$ext")
        cp -nv "$file" "$new"
done

I wrote it into an Automator Service script.

Thank you!
This is truly sweet.

---------- Post updated at 10:46 PM ---------- Previous update was at 10:30 PM ----------

Is there a way other than "cp -n" to make sure it doesn't overwrite an existing file?

If accidentally run on ...v0016 and ...v0017 already exists I just want it to fail rather than create an incorrect ...v0018. Not that it does that now, but if v0018 was created from a copy of ...v0016 it would be incorrect.

Thanks.

Last edited by scribling; 01-30-2013 at 02:36 AM..

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file::spec::functions

File::Spec::Functions(3pm)				 Perl Programmers Reference Guide				File::Spec::Functions(3pm)

NAME

       File::Spec::Functions - portably perform operations on file names

SYNOPSIS

	       use File::Spec::Functions;
	       $x = catfile('a','b');

DESCRIPTION

       This module exports convenience functions for all of the class methods provided by File::Spec.

       For a reference of available functions, please consult File::Spec::Unix, which contains the entire set, and which is inherited by the
       modules for other platforms. For further information, please see File::Spec::Mac, File::Spec::OS2, File::Spec::Win32, or File::Spec::VMS.

   Exports
       The following functions are exported by default.

	       canonpath
	       catdir
	       catfile
	       curdir
	       rootdir
	       updir
	       no_upwards
	       file_name_is_absolute
	       path

       The following functions are exported only by request.

	       devnull
	       tmpdir
	       splitpath
	       splitdir
	       catpath
	       abs2rel
	       rel2abs
	       case_tolerant

       All the functions may be imported using the ":ALL" tag.

COPYRIGHT

       Copyright (c) 2004 by the Perl 5 Porters.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

SEE ALSO

       File::Spec, File::Spec::Unix, File::Spec::Mac, File::Spec::OS2, File::Spec::Win32, File::Spec::VMS, ExtUtils::MakeMaker

perl v5.12.1							    2010-04-26						File::Spec::Functions(3pm)