Assuming a relatively recent version of perl (5.7.1+ IIRC) you can execute INIT at your discretion. However the trick is in avoiding executing them twice. Here's a very bare bones example of executing INIT blocks from both use and require 
package testpkg;

BEGIN { warn "in BEGIN\n" }

{
  no warnings;

  INIT {
    return if $INIT_DONE++;
    warn "in INIT\n";
  }
}

{
  use B;

  $_->object_2svref->() for grep {
    $_->GV->STASH->NAME eq __PACKAGE__
  } B::init_av->ARRAY;
}

1;

[download]
And some usage code 
$ perl -we 'use testpkg;'
in BEGIN
in INIT
$ perl -we 'require testpkg;'
in BEGIN
in INIT

[download]
Unfortunately it uses a rather horrific bodge of a package variable and post-increment behaviour, but nonetheless, it works :) Hopefully there's some very straight-forward solution for determining what state perl is in when a piece of code is executing, but currently I'm out of ideas.
HTH

_________
broquaint

In reply to Re: INIT blocks and runtime code loading by broquaint
in thread INIT blocks and runtime code loading by stvn

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