NAME

Script::State - Keep script local variables

SYNOPSIS

#!perl
use Script::State;

script_state my $count = 0; # set to last value if exists
say $count++;

# automatically write $count's current value to external file
# to be read at next script execution

FUNCTIONS/METHODS

script_state my $variable = $default;

Keep this variable's state after script execution.

Script::State->store;

Explicitly store current state. This is called in END block.

DESCRIPTION

Script::State stores local variables to file after script execution. Values of scalar variables with script_state are stored in another file, and the values are automatically loaded when script is executed at next time.

HOW THIS WORKS

Script::State stores variable states to file at same directory of script ($0). For example, if $0 eq 'foo/bar.pl', filename containing state is 'foo/.bar.pl.pl'.

When Script::State is import()ed, it will load previous state from the state file, and at the time script_state() is called, bind corresponding value to the variable.

When Script::State's END block is entered, this stores current variable values to the state file.

CAVEATS

This modules currently uses Data::Dumper::Dump and eval() to store/load state, maybe unsafe.

This modules currently does not lock state files.

AUTHOR

motemen <motemen {at} gmail.com>

LICENSE

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