NAME

IO::File::Cycle - Easily split output file while writing

VERSION

Version 0.01

SYNOPSIS

This module makes it easy to split a file while writing to it. This, for example, will create a number of files in /tmp called "foo.1.txt", "foo.2.txt", &c., all at most 10,000 bytes in size:

use IO::File::Cycle;

my $file = IO::File::Cycle->new('>/tmp/foo.txt');
for ( 1..100_000 ) {
	$file->cycle if tell($file) + length($_) + 1 > 10_000;
	print $file $_, "\n";
}
$file->close;

SUBROUTINES/METHODS

start_at()

Defines the starting number, which can be easily overridden in a subclass.

open()

Sets up some internal variables, then calls IO::File::open().

format_filename()

Formats the filename.

cycle()

Closes the current file, then opens a new file with an incremented number in the filename (before the extension if there is one, and after a "."). After closing the initial file, it renames it to have the index "1" – for example, "filename.1.ext".

filename()

Returns the current file's name. This can be called from a close() method in a subclass to post-process each file.

close()

This is a sample close() method, which in a subclass could post-process each file.

sub close { my $io = shift; my $filename = $io->filename; $io->SUPER::close; system "gzip -f $filename"; }

AUTHOR

Nic Wolff, <nic at angel.net>

BUGS

Please report any bugs or feature requests to bug-io-file-cycle at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=IO-File-Cycle. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

perldoc IO::File::Cycle

You can also look for information at:

• RT: CPAN's request tracker (report bugs here)

  http://rt.cpan.org/NoAuth/Bugs.html?Dist=IO-File-Cycle

• AnnoCPAN: Annotated CPAN documentation

  http://annocpan.org/dist/IO-File-Cycle

• CPAN Ratings

  http://cpanratings.perl.org/d/IO-File-Cycle

• Search CPAN

  http://search.cpan.org/dist/IO-File-Cycle/

ACKNOWLEDGEMENTS

LICENSE AND COPYRIGHT

Copyright 2012 Nic Wolff.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.

cpanm IO::File::Cycle

perl -MCPAN -e shell
install IO::File::Cycle