`use` package scope: how to make it cross files?

Question

In scriptA.pl, there is use DBI

In scriptB.pl, there is require \"scriptA.pl\"

But we still cannot use DB

Answer 1

I find myself wondering what it is you are attempting to achieve?

If you simply want to reduce boilerplate code (15 common use Foo declarations in every file), you can use a module like ToolKit to create a standard set of modules to use:

Put this into Powerboy.pm:

 package Powerboy;

 use base 'ToolSet'; 

 ToolSet->use_pragma( 'strict' );
 ToolSet->use_pragma( 'warnings' );

 ToolSet->export(
     'DBI'  => undef,  # Export the default set of symbols
 );

 1; 

And then in your scripts, simply do:

 use Powerboy;

 # We have strict, warnings and DBI now.