Once I have loaded a file using require, is there a clean way to reload the file?

I am running analyses on several 'families' of text files (Hazard reports, requirements documents, FMEAs.)

A Perl program analyzes the text-files. The program has many options, which I store in a HoH called %runSwitches. Each text-file needs a slightly different set of options.

Each document family has a default set of options, which must be tweaked for the particular text file.

Here's how I set it up: Each document has a short configuration file – documentName.pl. Each family has a file with a set of defaults – family_defaults.pl. The short configuration file loads the defaults, then asserts the tweeks: 

require "family_default.pl";          # default values into %runSwitch
+es
%runSwitches = (%runSwitches,         # tweeks for a single document
                switch1 => 'tweek1',
                switch2 => 'tweek2');

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This works fine. Except now I have a script that iterates though all the documents in a family. The first doc called loads the defaults and runs fine. The second file executes require "family_default.pl"; and does nothing, because family_default.pl is already in %INC. So the tweaks from the first file are still in effect, and I lose. I could Both of these seem like awkward hacks. Is there a better way to do this?

In reply to Right way to force the reloading of a file by throop

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