Poet::Import(3pm)					User Contributed Perl Documentation					 Poet::Import(3pm)

Poet::Import -- Import Poet quick vars and utilities
# In a script... use Poet::Script qw($conf $poet $log :file); # In a module... use Poet qw($conf $poet $log :file);
Poet makes it easy to import certain variables (known as "quick vars") and utility sets into any script or module in your environment. In a script: use Poet::Script qw(...); and in a module: use Poet qw(...); where "..." contains one or more quick var names (e.g. $conf, $poet) and/or utility tags (e.g. ":file", ":web"). (Note that "use Poet::Script" is also necessary for initializing the environment, even if you don't care to import anything, whereas "use Poet" has no effect other than importing.)
Here is the built-in list of quick vars you can import. Some of the variables are singletons, and some of them are specific to each package they are imported into. $poet The global environment object, provided by Poet::Environment. This provides information such as the root directory and paths to subdirectories. For backward compatibility this is also available as $env. $conf The global configuration object, provided by Poet::Conf. $cache The cache for the current package, provided by Poet::Cache. $log The logger for the current package, provided by Poet::Log.
Default utilities The utilities in Poet::Util::Debug are always imported, with no tag necessary. :file This tag imports all the utilities in Poet::Util::File. :web This tag imports all the utilities in Poet::Util::Web. It is automatically included in all Mason components.
Every Mason component automatically gets this on top: use Poet qw($conf $poet :web); "$m->cache" and "$m->log" will get you the cache and log objects for a particular Mason component.
Adding variables To add your own variable, define a method called provide_var_varname in "MyApp::Import". For example to add a variable $dbh: package MyApp::Import; use Poet::Moose; extends 'Poet::Import'; method provide_var_dbh ($caller) { # Generate and return a dbh. # $caller is the package importing the variable. # $poet is the current Poet environment. } "provide_dbh" can return a single global value, or a dynamic value depending on $caller. Now your scripts and libraries can do use Poet::Script qw($dbh); use Poet qw($dbh); Adding utility tags To add your own utility tag, define a class "MyApp::Util::Mytagname" that exports a set of functions via the ':all' tag. For example: package MyApp::Util::Hash; use Hash::Util qw(hash_seed all_keys); use Hash::MoreUtils qw(slice slice_def slice_exists); our @EXPORT_OK = qw(hash_seed all_keys slice slice_def slice_exists); our %EXPORT_TAGS = ( 'all' => @EXPORT_OK ); 1; Now your scripts and libraries can do use Poet::Script qw(:hash); use Poet qw(:hash);
Jonathan Swartz <swartz@pobox.com>
This software is copyright (c) 2012 by Jonathan Swartz. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.14.2 2012-06-05 Poet::Import(3pm)

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