That's a great idea. I started to play with something similar and got the following for the anon function on the @INC array. 
BEGIN {
        use 5.8.0;
        use vars qw(@missing);

        push @INC, sub { 
                my ($coderef, $filename) = @_;

                # Ignore non-modules.
                return undef unless ($filename =~ s/.pm$//);

                # Remember the module.
                $filename =~ s/\//::/g;
                push @missing, $filename;

                # Return a dummy file handle.
                open my $FH, '<', \'1;';
                $FH;
        };
}

[download]
The INIT block is a great idea. 
INIT {
        # Check and clean up.
        die "Missing modules.\n\tcpan -i ", join(' ',' @missing), "\n\
+n" if (@missing);
        pop @INC;
}

[download]
The open my $FH, '<', \'1;'; is available in perl 5.8.8.

Is there a better way to deduce the module name than removing the .pm extension and replacing /s with ::? Will it work on non-UNIX platforms?

Popping the function off again seems like a good idea.

In reply to Re^2: announce missing modules by Arif
in thread announce missing modules by Anonymous Monk

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