Let's assume I'm in an offline environment

The point of CPAN::Mini is to create a mirror when you are in an *online* environment (to be used in an offline environment).

I found a module CPAN::Mini::Inject

Yup, looks like it's exactly what you need. It even provides a command-line utility.

In reply to Re^3: Update module in offline cpan by ikegami
in thread Update module in offline cpan by Dirk80

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